Pasquale Mazzarella
(Vice-Sindaco Comune di Anacapri)
05/10/2014, 13:10
Prof.
Leonard Feldman
(Rutgers University)
05/10/2014, 13:30
Invited talk
Channeling for Advanced Electronic Materials Research
Leonard C. Feldman*
Institute for Advanced Materials, Devices and Nanotechnology
Rutgers University
Piscataway, NJ USA 08901
History: Ion channeling as applied to electronic materials research dates from the 1970s (1). This development was a fortuitous coincidence of needs and discovery. Classical channeling had reached a peak of...
FRANK ZIMMERMANN
(CERN)
05/10/2014, 14:15
Invited talk
The highest CERN priority for the next 20 years is the full exploitation of the Large Hadron Collider and its high-luminosity upgrade (HL-LHC). In preparation for the post-LHC era, the Future Circular Collider (FCC) study develops the design of a 100-TeV c.m. proton-proton collider (FCC-hh), based on 16-T Nb3Sn magnets, a new 100-km tunnel infrastructure, and, possibly, crystal collimators....
Dr
Calin Alexandru Ur
(ELI-NP)
05/10/2014, 15:00
Invited talk
Extreme Light Infrastructure – Nuclear Physics (ELI–NP) is one of the three pillars of the pan–European ELI initiative, aiming to use extreme electromagnetic fields for nuclear physics research. The pillar, currently under construction at Magurele – Bucharest, will comprise a high power laser system and a very brilliant gamma beam system. Both systems are at the edge of the present–day’s...
Dr
Didier Mazon
(CEA Cadarache)
05/10/2014, 15:45
Invited talk
After more than fifty research years on different implementations, the concept of the tokamak is a very good candidate to lead to a fusion reactor. In fact, certain regimes of functioning allow today the tokamaks to attain performances close to those requested by a reactor. However, these performances are acquired on extremely short duration only and means to acquire and maintain them are not...
Dr
Artak Mkrtchyan
(Institute of Applied Problems of Physics NAS RA), Prof.
Samvel Haroutiunian
(Chairman of the State Committee of Science Republic Armenia)
05/10/2014, 16:30
Invited talk
Main directions of Armenia's cooperation with other countries in the field of science and innovation
Mr
Xavier Artru
(Université Lyon-1, CNRS/IN2P3, IPNL)
06/10/2014, 09:00
Invited talk
Radiation by relativistic electrons in matter, near matter or in external field, from Channeling to Smith-Purcell radiations, are compared regarding
1) the emission mechanisms. Is it direct or via medium polarization? classical or quantum ? target-coherent ? bunch-coherent ? dipole or non-dipole ? in weak or critical QED field ?
2) the radiation qualities: intensity, hardness, line width...
Dr
Ulrik Uggerhoej
(Dept. Physics and Astronomy)
06/10/2014, 09:45
We present an experimental demonstration of a Small Amplitude Short Period (SASP) Crystal Undulator, proposed by A. Kostyuk. Such a device produces MeV radiation from 6-800 MeV electrons, and observed spectra are in good agreement with calculated values.
Dr
Alexander Shchagin
(Kharkov Institute of Physics and Tecknology)
06/10/2014, 10:00
A.V. Shchagin
Kharkov Institute of Physics and Technology, Kharkov, Ukraine
Belgorod State University, Belgorod, Russia
Usually, results of interaction of relativistic particles with a crystalline deflector are observed as a variation in the angular distribution of the particles. But for recent ten, the understanding of properties of X-ray radiation of relativistic particles moving in a...
Prof.
Yuri Kunashenko
(National Research Tomsk Polytechnic University; Tomsk State Pedagogical University)
06/10/2014, 10:15
In the present paper we investigate the combine effect in CB from axially channelled electrons. To study this combine effect we modified method of virtual photons, taking into account the channelling of the radiating particles.
Mr
Vyacheslav Malyshevsky
(Southern Federal University, 344090, Rostov-on-Don, Russia)
06/10/2014, 10:30
The influence of the processes electrons capture (or loss) by the high-energy multiply charged ions on the Cherenkov and transition electromagnetic radiation are discussed. Multiply charged ion charge fluctuations in the targets lead to an additional contribution to spectral- angular density of radiation (the correlation effect [1]). If the threshold condition for the occurrence of Cherenkov...
Dr
Edward Tsyganov
(UTSWMC)
06/10/2014, 10:45
The paper presents a brief background on cold fusion leading to a discussion on some aspects of atomic physics. We are explaining the selection of the only permitted orbitals of deuterium atoms in conducting crystals when saturated with deuterium. Conduction electrons in metallic crystal are grouped in potential niches of the crystal lattice, resulting in a ban for s-states of hydrogen to...
Prof.
Vladimir Baryshevsky
(Research Institute for Nuclear Problems)
06/10/2014, 11:30
Invited talk
Parametric X-Ray radiation in natural crystals is well known [1-4]. The similar radiation mechanism arises when a charged particle moves in a photonic crystal [5, 6].
Quasi-Cherenkov parametric radiation in a photonic crystal is considered. The expressions for spectral-angular distribution of quasi-Cherenkov radiation emitted by a relativistic particle traversing a photonic crystal are...
Dr
Robert CHEHAB
(IPNL/IN2P3)
06/10/2014, 12:00
X.Artru(a), I.Chaikovskab(b), R.Chehab(a), M.Chevallier(a), O.Dadoun(b), K.Furukawa(c), H.Guler(b), T.Kamitani(c), F.Miyahara(c), M.Satoh(c), P.Sievers(d), T.Suwada(c), K.Umemori(c), A.Variola(b)
(a)IPNL/IN2P3/CNRS and Universite Lyon-1 (France)
(b)LAL/IN2P3/CNRS and...
Prof.
Nikolay Kalashnikov
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, Russia)
06/10/2014, 12:15
One of the important problems in today’s astrophysics and gamma–astronomy is the construction of detectors for high energy photons (more than 1GeV) with the high angle resolution. In this energy range the dominating effect in interaction of photons with matter is e-e+ pair production.The high angle resolution may be achieved using single crystals as an effective converter of photons into...
Prof.
Yury Pivovarov
(National Research Tomsk Polytechnic University)
06/10/2014, 12:30
The difference in angular distributions of the standard Parametric X-Radiation (PXR) from plane-wave electrons (without channeling) and Parametric X-Radiation from channeled electrons (PXRC) is connected with manifestation of two quantum effects: formfactors of transverse quantum channeling states and their initial populations. In the present work we showed that this difference has non-trivial...
Mr
Sergii Trofymenko
(Kharkov Institute of Physics and Technology)
06/10/2014, 12:45
In the present work the theory of ultra relativistic electron-positron pair ionization loss in thin plate, situated on different distances from the substance in which the pair is created (which corresponds to the experimental situation of [1]) is developed. It is shown that in this case the transition radiation which occurs during the pair emission from substance may significantly influence...
Prof.
Nikolai Shul'ga
(Akhiezer Institute for Theoretical Physics of NSC KIPT)
06/10/2014, 14:30
Invited talk
In the present report a short review is given of last results on electromagnetic processes at high energies with “half-bare” particles such as transition radiation, Bremsstrahlung in a structured target, coherent radiation in ultrarelativistic crystals, ionization energy losses in a thin layer of matter, process of high energy electron-positron pairs production, etc. Considered are also some...
Dr
Micola Bondarenco
(Kharkov Institute of Physics and Technology)
06/10/2014, 15:15
Multiphoton spectra for channeling radiation are calculated based on techniques developed in [1], with the addition of averaging over charged particle impact parameters posterior to the calculation of the radiation straggling. Cases of planar and axial channeling in harmonic wells are considered, for which high photon multiplicity approximations for channeling radiation spectra are derived....
Dr
Alexey Tishchenko
(National Research Nuclear University "MEPhI")
06/10/2014, 15:30
Left-handed metamaterials are known to demonstrate unusual optical properties, like negative refractive index, inverse Doppler effect, backward waves (the waves with contrary directed phase and group velocities), focusing beyond the diffraction limit. On the other hand, polarization radiation of charged particles has much in common with the processes of scattering of light in matter....
Prof.
Vladimir Vysotskii
(Kiev National Shevchenko Univ, Kiev, Ukraine)
06/10/2014, 15:45
The influence of the spatial distribution of electrons, atoms and nuclei in condensed media on medium’s susceptibility and on the conditions of both X-ray Cherenkov radiation and laser X-ray (gamma-ray) generation are considered.
It was shown that the “traditional” condition of Cherenkov radiation is incorrect and takes place only in idealized case of a completely homogenous medium without...
Prof.
Hironari Yamada
(Ritsumeikan University)
06/10/2014, 16:30
Invited talk
The theory of Synchrotron-Cherenkov Radiation (SCR) is proposed by Rynne et al. in 1978 in the field of Astronomy, but actual radiations have never been observed. We had to wait this observation until a tabletop synchrotron light source (TSLS) was developped. By hitting light materials by energetic electrons under magnetic field in linear accelerator it could be observed, but SCR is hided...
Dr
Gennady Naumenko
(Tomsk Pilytechnic University)
06/10/2014, 17:00
The usefulness of a radiation of relativistic electrons in optical fibers in beam diagnostics was proposed by X. Artu at the symposium RREPS-11 (see also [1]). In this work the properties of different types of radiation, such as diffraction and Cherencov radiation, induced in fibers by an electromagnetic field of relativistic electron were considered. We present in this report the results of...
Mr
Sergei Anishchenko
(Research Institute for Nuclear Problems)
06/10/2014, 17:00
Poster
We study the features of cooperative parametric (quasi-Cherenkov) radiation arising when an electron bunch passes through a crystal (natural or artificial) under the conditions of dynamical diffraction of electromagnetic waves in the presence of shot noise.
It is shown that the intensity of cooperative quasi-Cherenkov radiation emitted at small angles to the particle velocity direction...
Dr
Evgeny Mazur
(NATIONAL RESEARCH NUCLEAR UNIVERSITY MEPHI)
06/10/2014, 17:00
Poster
In the channeled regime a particle loses its energy to generate the collective and single-particle excitations in the crystal at the same time with the emission of photons. This process is accompanied with transitions of particle from one transverse energy discrete state into another. A theory of energy losses and the corresponding excitation of the crystal for the quantum channeled particle...
Prof.
Nikolay Kalashnikov
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, Russia)
06/10/2014, 17:00
Poster
It is well known that the energy and momentum conservation laws forbid positron-electron annihilation, producing the single photon only. It can produce two photons in vacuum, or the process is possible with a participation of the third body.
The situation can be essentially changed in a single crystal when one or the both leptons are moving in the channeling regime when the transverse motion...
Prof.
Viktor Tikhomirov
(INP Minsk)
06/10/2014, 17:00
Poster
Though crystal undulators (CUs) were devised long ago, reliable realistic description of their functioning has become possible only after the recent development and experimental validation of the corresponding simulation tool. A thorough numerical analysis of both conducted and suggested experiments reveals limited perspectives of development of electron CUs and stimulates a return to the...
Dr
Nickolae Maksyuta
(Kiev National Shevchenko univmsksyu)
06/10/2014, 17:00
Poster
The given paper investigates the orientation motion of charged particles (electrons, positrons, ions) in charged [100] and [110] axes of CsCl-type crystals. Principle difference from previous work which investigated similar problems is in the usage of more correct and ground type of potential of charged axes for such crystals.
This potential is consists of the following steps: 1) the...
Dr
Valery Kaplin
(Tomsk Polytechnic University)
06/10/2014, 17:00
Poster
The effect of asymmetric near-surface X-rays generation, observed recently at a grazing interaction of 33 MeV electrons with a 56 μm Si plate placed along the electron beam in a goniometer into the betatron chamber in a magnetic field, is presented. The evolution of the angular patterns of X-rays generated when changing the orientation of the Si plate relative to the electron beam showed...
Dr
Behnam Azadegan
(Hakim Sabzevari University), Mr
Seyed Ali Mahdipour
(Hakim Sabzevari University), Dr
Wolfgang Wagner
(HZDR Dresden)
06/10/2014, 17:00
Poster
Positron production based on the generation of channeling radiation by relativistic electrons channeled along the <100> axis of a W crystal and the subsequent conversion of radiation into e+e--pairs in an amorphous tungsten target is described. Electron dechanneling is considered by solving of the Fokker-Planck equation which describes the passage of axially channeled electrons through a thick...
Ramazan Nazhmudinov
(Belgorod State Ubiversity)
06/10/2014, 17:00
Poster
A.G. Afonin1, G.I. Britvich1, Yu.A. Chesnokov1, A.A. Durum1, M.Yu. Kostin1,
V.A. Maisheev1, D.A.Savin1, A.A. Yanovich1, R.M. Nazhmudinov2, A.S. Kubankin2,
N.F. Shul’ga3,4, A.V. Shchagin2,3, S.R. Uglov5, A.S. Gogolev5
1Institute of High Energy Physics, Moscow Region, Protvino, Russia
2Belgorod State University, Belgorod, Russia
3Kharkov Institute of Physics and Technology, Kharkov,...
Mr
Ilia Fartushev
(Tomsk State Pedagogical University)
06/10/2014, 17:00
Poster
In the present report we consider the cross - symmetrical process to the channelling radiation the electron - positron pair production by channelled positron. We derive the differential over emission angles cross - section of the electron - positron pair production by channelled positron. The angular distribution of created electron and positron is investigated. The dependence on initial...
Prof.
Yury Pivovarov
(National Research Tomsk Polytechnic University)
06/10/2014, 17:00
Poster
Unless it’s long history and successful applications in detector physics, many fundamental properties of Cherenkov radiation from different types of relativistic particles still are not studied in detail, see e.g. [1-3] and references therein. Here, we report on recent first experiment on Cherenkov light measurements from 255 MeV electrons at SAGA-LS accelerator facility [4]. The target used...
LAURA BANDIERA
(FE)
06/10/2014, 17:00
Poster
When relativistic electrons and positrons transverse a medium bremsstrahlung radiation is emitted. The anisotropy of a crystalline medium can modify the dynamics of the charged particles and so the photon emission. Indeed, if the angle between a charged particle and crystalline planes or axes is small, the particle suffers a series of correlated collision with atoms in the same plane or row,...
Dr
Gennady Naumenko
(Tomsk Polytechnic University), Mr
Vitold Bleko
(National Research Tomsk Polytechnic University)
06/10/2014, 17:00
Poster
The diffraction and Cherenkov radiation have been observed in the millimeter wavelength range from 8 to 30 mm emitted by bunched electron beams of 6.1 MeV passing near a Teflon target. The radiation intensity at wavelength mm is enhanced by a factor in comparison incoherent radiation, the value of this factor equal to the number of electrons in the bunch. Properties of the radiations have...
Mr
Anatoly Konkov
(Tomsk Polytechnic University)
06/10/2014, 17:00
Poster
The Cherenkov radiation (ChR) is generated in the soft X-ray region in the vicinity of the absorption edges, where the well-known Cherenkov condition is fulfilled [1]. This X-ray ChR peculiarity can be useful for different applications such as development of the compact, narrow-band, and intense soft X-ray sources [2, 3]. Authors of the experiments [3, 4] have measured the X-ray yield in the...
Mr
Sergei Abdrashitov
(National Research Tomsk Polytechnic University)
06/10/2014, 17:00
Poster
Electromagnetic waves is proven [1] to possess an intrinsic angular momentum. Two alternative and concordant approaches to the definition of the theory of the angular momentum of the electromagnetic field and general properties of the angular momentum of synchrotron radiation are described in [2].
The computer code BCM-1 [3] is able to calculate the trajectories of electrons and positrons at...
Dr
Timur Tukhfatullin
(National Research Tomsk Polytechnic University), Prof.
Yury Pivovarov
(National Research Tomsk Polytechnic University)
06/10/2014, 17:00
Poster
We present the result of the experiments and comparison with computer simulation and analysis of channeling radiation spectra in HWC as well. The comparison with radiation spectrum from an electron moving in an arc(never studied experimentally) is also performed.
Mr
Gennady Sushko
(Frankfurt Institute for Advanced Studies)
06/10/2014, 17:00
Poster
In the talk the results of simulations of axial channeling of electrons and positrons in straight and periodically bent Si crystals will be reported and compared with the planar channeling case [1-3]. The simulations of trajectories of channelled projectiles with accounting for the all-atom interactions have been performed by solution of the classical relativistic equations of motion using...
Mr
Sergei Abdrashitov
(National Research Tomsk Polytechnic University)
06/10/2014, 17:00
Poster
S.B. Dabagov a,b
S.V. Abdrashitov c,d, O.V. Bogdanov c, Yu.L. Pivovarov c, T.A. Tukhfatullin c
a INFN Laboratori Nazionali di Frascati. Frascati (RM), Italy
b LPI RAS, NRNU MEPhI, Moscow, Russia
c National Research Tomsk Polytechnic University, Tomsk, Russia
d National Research Tomsk State University, Tomsk, Russia
The problem of positron beam generation remains of interest during...
Dr
Hovhannes Muradyan
(Institute of Applied Problems in Physics, Yerevan, Armenia)
06/10/2014, 17:00
Poster
A two-dimensional periodic (the so-called continuous) potential ... is studied, that is obtained by replacing the true potential of a single crystal by the potential averaged (i) over all atomic chains, which are parallel to the selected crystallographic axis of a single crystal, and (ii) over the thermal vibrations of atomic cores of the single crystal: ...=... (Z-axis of the cylindrical...
Prof.
Sergey Blazhevich
(Belgorod National Research University)
06/10/2014, 17:00
Poster
The dynamical theory of coherent X-ray radiation generated in a single-crystal target by the beam of relativistic electrons with a finite divergence is developed in the scattering geometry Laue. Coherent X-ray emission is considered in the general case of asymmetric reflection of the Coulomb field of the electron in the form of two emission mechanisms contributions: of the parametric X-ray...
Prof.
Igor Vnukov
(Belgorod National Research university, Belgorod, Russia)
06/10/2014, 17:00
Poster
Influence of real photon diffraction on parametric X-ray radiation angular distribution in thin perfect crystals
Yu. A. Goponov, S.A. Laktionova, O.O. Pligina, M.A. Sidnin, I.E. Vnukov,
Belgorod National Research University, 14 Studencheskaya str., 308007 Belgorod, Russia
Recently it has been suggested to use parametric X-ray radiation (PXR) angular distribution of fast particles...
Mr
Artur Movsisyan
(Institute of Applied Problems of Physics NAS RA, Yerevan, Armenia)
06/10/2014, 17:00
Poster
The results of experimental investigation of the phenomenon of parametric X-ray radiation (PXR) emitted by relativistic electrons with 40-50 MeV energy is presented. Comparison results of propagation of PXR either forward or beckward to the motion of relativistic electrons is analyzed. New opportunities for crystal structure analysis with light atoms is offered.
Dr
Konstantin Lekomtsev
(High Energy Accelerator Research Organisation (KEK))
06/10/2014, 17:00
Poster
THz frequency region is very challenging part of electromagnetic spectrum for radiation generation and detection because of relatively low maturity level of components and systems that operate in this region. Although situation is improving with more and more advances in the field, much of challenging and exciting potential still remains untapped [1].
Recent advances in generation of short...
Mr
Anatoly Konkov
(Tomsk Polytechnic University), Mr
Dmitry Shkitov
(National Research Tomsk Polytechnic University)
06/10/2014, 17:00
Poster
Nowadays the electron micro-train beams are useful for different applications such as multibunch resonant plasma wakefield acceleration [1], particle acceleration by stimulated emission of radiation [2], generation of intense coherent electromagnetic radiation [3, 4] and etc. Therefore bunch-to-bunch interaction investigation becomes essential. In the general case micro-train is from 2 up to a...
Prof.
Nikolai Shul'ga
(Akhiezer Institute for Theoretical Physics of NSC KIPT)
06/10/2014, 17:00
Poster
We will report estimation of the formation (interference) length of quantum emitted by the electron passing through the undulator based on statistics of recoils undergone by the electron due to emission of quanta. As it is shown, the number of coherent quanta is inversely proportional to the energy of the electron for a fixed adulator period, and in direct proportion to the undulator for a...
Dr
Micola Bondarenco
(Kharkov Institute of Physics and Technology)
06/10/2014, 17:00
Poster
Interference pattern in the spectrum of non-dipole bremsstrahlung on two amorphous foils is investigated. Apart from suppression at lowest photon energies, there is also an enhancement in the adjacent spectral region, and in classical electrodynamics, the net effect of suppression and enhancement must to be zero. We study the location and origin of the spectral features, comparing predictions...
Ms
Darya Sergeeva
(National Research Nuclear University "MEPhI")
06/10/2014, 17:00
Poster
In this work the X-Ray diffraction radiation from the bunch with Gaussian distribution of the particles is considered. The expressions for coherent and incoherent form-factors are obtained with taking into account the particles moving parallel to the surface of the target at arbitrary angles to the general direction of the bunch velocity. The quantitative and qualitative changes in the...
Prof.
Vladimir Vysotskii
(Kiev National Shevchenko Univ, Kiev, Ukraine)
06/10/2014, 17:00
Poster
The radiation processes associated with a supersonic liquid jet exhausting from narrow dielectric or metal channels are considered. During researches of different regimes of cavitation we have observed several anomalous radiative phenomena: very intensive optical glow of liquid jet and controlled X-ray radiation. It has been found for the first time that the output of the channel and the...
Dr
Alexander Shchagin
(Kharkov Institute of Physics and Tecknology)
06/10/2014, 17:00
Poster
A.V. Shchagin1,2, V.S. Miroshnik1, V.I. Volkov1
1Kharkov Institute of Physics and Technology, Kharkov, Ukraine
2Belgorod State University, Belgorod, Russia
Usually, pyroelectric crystals are applied in pyroelectric accelerators. In present paper, the possibility for application of polarized ferroelectric ceramics instead of pyroelectric crystals in a pyroelectric accelerator is shown...
Prof.
Levon Grigoryan
(Institute of Applied Problems in Physics, Yerevan, Armenia)
06/10/2014, 17:15
The radiation generated by a charged particle uniformly moving along Z axis is studied under assumption that the particle first travels inside a semi-infinite homogeneous medium (range ...), then passes an intermediate layer of inhomogeneous matter (...) and eventually to vacuum (...). Inside the intermediate layer the homogeneous medium (...) smoothly transforms into vacuum (...). ...
Dr
Alexander Kubankin
(Belgorod National Research University)
06/10/2014, 17:30
Polarization bremsstrahlung (PB) appears as a result of scattering of a relativistic particle Coulomb field on atoms. The PB spectrum contains Bragg coherent peaks when the particle moves in a structured medium. The position of the peaks is determined by the distance between crystallographic planes, which makes it possible to determine the parameters of the lattice similarly to XRD methods....
Ms
Darya Sergeeva
(National Research Nuclear University "MEPhI")
06/10/2014, 17:45
In this work we consider the radiation from a thin target in X-Ray, optical and lower frequencies regions for two cases: the particle moves in the plane which is perpendicular to the screen; the particle moves in plane which is parallel to the screen. It is the geometry that is important for calculating of horizontal divergence of the bunch. We give analytical description of diffraction...
Dr
Hisataka Takenaka
(Toyama Co.,Ltd.)
06/10/2014, 18:00
The development of compact x-ray generator based on the electron cryo-linear accelerator has been studied in collaboration with Nihon university, High energy accelerator research organization and Toyama. To realize highly sensitive phase contrast imaging at clinics, a parametric x-ray radiation (PXR)-based source is one of attractive candidates[1-3]. However, the monochromatic x-rays of 109 to...
Prof.
peter Wobrauschek
(Atominstitut TU WIEN)
07/10/2014, 09:00
Invited talk
X-ray optics are powerful and effective tools to focus x-rays into small spots ranging from several 100 µm to world records of a few nm. The demand to reach such dimensions is the interest to have an extreme spatial resolution and getting information about elemental distribution, chemical state, morphology of a sample. The classical x-ray optical components are Fresnel lenses, compound...
Prof.
Robert Avakian
(A. Alikhanyan National Laboratory (Yerevan Physics Institute), Brothers Alikhanians, 2, Yerevan, 0036, Armenia)
07/10/2014, 09:30
The final goal of the proposed Project is the creation of a Complex of Accelerator Facilities at the Yerevan Physics Institute (CAF YerPhI) for nuclear physics basic researches, as well as for applied programs including Boron Neutron Capture Therapy (BNCT) and radiation therapy with proton and carbon beams. The CAF will include the following facilities: Cyclotron C70, target/ion source,...
Dr
Didier Mazon
(CEA Cadarache)
07/10/2014, 09:45
In Tokamaks, plasma emits as a volumetric Soft-X-Ray (SXR) source and can give very useful information about plasma stability, shape and impurity content. Measuring the SXR radiation ([0.1 keV; 20 keV]) of magnetic fusion plasmas is a standard way of accessing
valuable information on particle transport and MagnetoHydroDynamic (MHD).Unfortunately, the strong constraints imposed by the...
Dr
Yasushi Hayakawa
(Laboratory for Electron Beam Research and Application (LEBRA), Nihon University)
07/10/2014, 10:00
To demonstrate the element-sensitive computed tomography (CT), CT scanning experiments were carried out for several specimens containing strontium using a parametric X-ray (PXR) beam having energies near the Sr K-shell edge of 16.1keV. The three-dimensional distributions of Sr were successfully obtained from the difference between the CT images taken on opposite sides of the absorption edge....
Prof.
Kouichi Tsuji
(Osaka City University)
07/10/2014, 10:15
A projection type XRF imaging has been studied. We have developed WD-XRF imaging spectrometer using WDS spectrometer, a straight polycapillary optics, and x-ray CCD camera. The advantage of WD-XRS is a high energy-resolution, approximately 40 eV. The problem of the present polycapillary optics will be discussed regarding spatial resolution. Similarly to WD-XRF imaging, XRD imaging spectrometer...
Mr
Luca Marchitto
(Istituto Motori - CNR)
07/10/2014, 10:45
This work reports the results of a X-ray µ-tomography for investigating the inner structure of high pressure fuel sprays. X-ray imaging is widely used in a multitude of industrial applications where non-destructive tests are required for high accuracy measurements of samples morphology. Synchrotron X-ray source is generally used for fuel sprays investigation because its high flux radiation can...
Prof.
Jorge Eduardo Fernandez
(Alma Mater Studiorum University of Bologna)
07/10/2014, 11:30
Invited talk
MCSHAPE [1] is a general purpose Monte Carlo code developed at the University of Bologna to simulate the multiple scattering of the prevailing photon-matter interactions in the energy range 1-1000 keV, including a detailed evolution of the polarization state of the radiation. MCSHAPE is particularly appropriate for describing the multiple scattering terms which, overlapped, build up the whole...
Augusto Marcelli
(LNF), Dr
Mikhail Mazuritskiy
(Southern Federal University)
07/10/2014, 12:00
Capillary optics is a basic X-ray technology capable to deliver a high flux density with a sub-micrometer spot. This compact optics could be easily used used to guide and shape a X-ray beam characterized by a high intensity, a small spot, a low divergence and high homogeneity. We present here synchrotron radiation soft X-ray experiments performed in transmission with different types of...
Prof.
Alexander Lobko
(Institute for Nuclear Problems)
07/10/2014, 12:30
Dynamical diffraction theory of the parametric gamma-rays is presented in the current contribution.
Prof.
Alpik Mkrtchyan
(Institute of Applied Problems of Physics of NAS RA, 0014, Hr. Nersisyan str. 25, Yerevan, Armenia. National Research Tomsk Polytechnic University 634050, Lenin Avenue 30, Tomsk, Russia.)
07/10/2014, 12:45
In the work [1] it was first observed the phenomenon of the full pumping of thermal neutron beams from transmitted direction to the reflection direction from the reflecting atomic planes (101 ̅1) of single quartz crystal in the Laue geometry under the influence of the temperature gradient. In [2] considered theoretically the problem of diffraction of the neutron beam in single crystals under...
Dr
Andrey Solov'yov
(Physics Department, Goethe University, Max-von-Laue Str. 1, D-60438 Frankfurt am Main)
07/10/2014, 14:30
Invited talk
We report results of simulation of axial and planar channeling of electrons, positrons and muons in straight [1] and periodically [2, 3] bent Si crystals. The simulations of trajectories of channelled projectiles with accounting for the all-atom interactions have been performed by solution of the classical relativistic equations of motion using newly developed module of the universal MBN...
Prof.
Hartmut Backe
(Institute of Nuclear Physics, Johannes Gutenberg University, D-55099 Mainz, Germany)
07/10/2014, 15:00
Experiments have been performed at the Mainz Microtron MAMI to investigate planar electron channeling in bent [1], and in periodically bent silicon single crystals [2-4]. The low emittance electron beam of MAMI providing energies below 0.855 GeV is well suited to prepare a beam with small angular divergence which is mandatory for channeling experiments.
A very important prerequisites for...
Dr
Andrey Korol
(Physics Department, Goethe University, Max-von-Laue Str. 1, D-60438 Frankfurt am Main)
07/10/2014, 15:30
The channeling process in periodically bent Si crystals is shown [1-3] to efficiently serve for producing highly monochromatic radiation in a gamma-ray energy spectral range. A short-period small-amplitude bending yields narrow undulator-type spectral peaks in radiation spectrum from multi-GeV electrons and positrons channeling through the crystal. Benchmark theoretical results on the...
Prof.
Nikolai Shul'ga
(Akhiezer Institute for Theoretical Physics of NSC KIPT)
07/10/2014, 15:45
An effect analogous to TSF-effect is possible at passing of particles through thin crystals. In this case, nevertheless, not the Bremstrahlung should be suppressed, but the coherent ultrarelativistic electrons radiation. In the last years a possibility is opened to research experimentally this effect, which is connected with the development of the technology of producing ultra thin crystals...
Prof.
Anand Pathak
(University of Hyderabad)
07/10/2014, 16:30
Invited talk
The phenomenon of electron and positron channeling in a crystal affected by various imperfections has been investigated. We have continued our work on the quantum aspects of the positron channeling in a crystal bent by dislocations where the effects of longitudinal motion of the particle are also considered along with the transverse motion. These calculations are now extended to include...
Dr
Evgeny Mazur
(NATIONAL RESEARCH NUCLEAR UNIVERSITY MEPHI)
07/10/2014, 17:00
The mutual influence of the processes of radiation and generation of excitations in the quantum crystal with the channeled particle (electron or positron) is considered. The emergence of new peaks in the emission spectrum of such a channeled particle associated with the processes of simultaneous resonant hard gamma-quantum and plasmon excitation during its motion in the crystal is...
Dr
Sergey Uglov
(Tomsk Polytechnic University)
07/10/2014, 17:00
Poster
The dynamics of changing the form of angular distribution and intensity of EUV radiation emitted from a multilayer Mo/Si mirror with changing the angle of grazing incidence o of 5.7 MeV electrons on the mirror surface has been investigated. Two series of angular distributions of radiation have been measured in the region of detection angle 60o< D <160o with and without use a 1 μm Al...
Mr
Alexandr Savchenko
(Yurevich), Dr
Alexey Tishchenko
(National Research Nuclear University "MEPhI")
07/10/2014, 17:00
Poster
National Research Nuclear University MEPhI, Moscow, Russia
Parametric X-ray radiation (PXR) occurring when charged particles move in a crystal
was predicted theoretically by M.L. Ter-Mikaelyan in 1972 [1], and then observed
experimentally at the Tomsk Synchrotron Sirius in 1985 [2]. Since then PXR has been
studied very well, both theoretically and experimentally (see, for...
Mr
Alexsandr Ponomarenko
(Russia)
07/10/2014, 17:00
Poster
Diffraction radiation (DR) occurs when a charged particle moves near the target. Smith-Purcell effect in DR, or Smith-Purcell radiation (SPR), is caused by periodicity of the target. Both DR and Smith-Purcell radiation have a lot in common with the widely known Cherenkov radiation (CR): all these types of radiation arise due to the polarization of the target material by the Coulomb field of...
Ms
Elena Fiks
(National Research Tomsk Polytechnic University)
07/10/2014, 17:00
Poster
When the relativistic heavy ions (RHI) penetrate through the thin solid amorphous target (plate) with a constant velocity, two types of electromagnetic radiation may appear: Cherenkov radiation (ChR) (optically transparent plate) and transition radiation (TR) – in optical and/or in X-Ray regions. The RHI bremsstrahlung is strongly suppressed (compared to relativistic electrons) due to large...
Prof.
Karo Ispirian
(A. Alikhanyan National Laboratory (Yerevan Physics Institute), Brothers Alikhanian 2, Yerevan,), Dr
Victor Yaralov
(A. Alikhanyan National Laboratory (Yerevan Physics Institute), Brothers Alikhanian 2, Yerevan,)
07/10/2014, 17:00
Poster
Though the influence of the laser field on channeling radiation (ChR) of electrons with energies up to ~100 MeV has been studied quantum mechanically in many works [1-7], nevertheless, up to now there are no experimental results on such effect. With the purpose to accelerate the necessary experiments and developing the results of [8-10] carried out with the help of the methods [11] for...
Dr
Gennady Naumenko
(Tomsk Polytechnic University), Ms
Veronika Soboleva
(National Research Tomsk Polytechnic University)
07/10/2014, 17:00
Poster
The interaction of relativistic electron field with periodic wire structure was considered theoretically in [1] for semi-infinite wire structure. We present in this work the experimental investigation of the interaction of relativistic electron field with periodic wire structure. The used target represented the right triangular prism. The measurements were done in millimeter wavelength region...
Dr
Anna Kotanjyan
(Yerevan State University)
07/10/2014, 17:00
Poster
We investigate the radiation intensity for a charged particle moving along a helical trajectory with an arbitrary cross section around a dielectric cylinder immersed into a homogeneous medium. The corresponding formulae generalize our previous results for the special case of a coaxial circular orbit. For the latter geometry, under certain conditions for the charge velocity and dielectric...
Mr
Alexsandr Ponomarenko
(Russia)
07/10/2014, 17:00
Poster
The nature of polarization radiation is the dynamic polarization of the material by the Coulomb field of passing particles [1]. Depending on the conditions the different types of polarization radiation can occur: Cherenkov radiation (CR), transition radiation, diffraction radiation, Smith-Purcell radiation (SPR) and so on. Sometimes simultaneously two or more mechanisms can take place and then...
Dr
Pavel Karataev
(Royal Holloway, Unviersity of London)
07/10/2014, 17:00
Poster
Optical Transition Radiation appearing when a charged particle crosses a boundary between two media with different dielectric properties has widely been used for transverse beam size, energy spread, position, and emittance diagnostics. Recent developments have demonstrated an ability to achieve sub-micrometre resolution for transverse beam size measurements [1]. However, a high power beam...
Dr
Hrant Khachatryan
(Institute of Applied Problems in Physics, 25 Hr. Nersessian Str., 0014 Yerevan, Armenia)
07/10/2014, 17:00
Poster
Some characteristic features in the electromagnetic field of a charged particle uniformly revolving along an equatorial orbit around a metallic ball has been studied. The obtained numerical results are based on the corresponding exact solutions of the Maxwell equations. They have been derived in [1,2] by means of the Green functions method, and earlier in [3] for special cases when the...
Mr
Koryun Gevorgyan
(Yerevan State University (student))
07/10/2014, 17:00
Poster
The problem of the radiation of channeled positron beam in a system nanotubes is solved. The polarization of the medium imposes a ban on the value of the beam energy for the formation of radiation. The energy threshold increases with increasing amplitude of the oscillations of positrons. The case is considered whenthe beam energy coincides with the threshold energy for the maximum amplitude...
Prof.
Lekdar Gevorgian
(A. Alikhanyan National Labortory (Yerevan Physics Insitute))
07/10/2014, 17:00
Poster
We investigate the undulator radiation from relativistic positrons channeled in wiggler nanotub.It is shown that the main contribution to the radiation intensity comes from higher harmonics.The energy range of the total spectrum of the number of emitted photons is wide.Both the number of emitted photons and the radiation angle do not depend on the photon energy.However, the spectral...
Mrs
Anahit Shamamian
(A. Alikhanyan National Laboratory (Yerevan Physics Inistute))
07/10/2014, 17:00
Poster
The problem of coherent radiation from microbunchedFEL beam passing through the plasma and interacting with laser beat waves (LBW) is considered. The interaction of plasma with LBWgenerates harmonic modulation of longitudinal density with increasing amplitude and also alongitudinal periodic electric field.Therefore, the beam electrons are influenced by the inhomogeneity of the medium and by...
Mr
Denis Nikitin
(Lomonosov Moscow State University, Faculty of Physics, Russia, 119991, Moscow, GSP-1, 1-2 Leninskiye Gory), Prof.
Vladislav Grishin
(Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University)
07/10/2014, 17:00
Poster
PBR is generated as result of the scattering own Coulomb's field of fast electron on matter electrons. This field can be represented as a stream of virtual photons, scattering them on atomic electrons generates PBR. Therefore PBR is very sensitive to electronic configuration that is of obvious interest to PBR as a possible method of diagnostics of the matter structure of. However, the spectrum...
Mr
Vyacheslav Malyshevsky
(Southern Federal University, 344090, Rostov-on-Don, Russia)
07/10/2014, 17:00
Poster
The features of the angular distributions of accelerated neutral atoms at grazing incidence on the surface of Al ( 001) [1,2] are theoretically investigated. Interaction of accelerated atoms with atoms of the crystal lattice, electronic properties and atomic structure of the surface of the Al ( 001) are calculated using the DFT methods. Simulation of angular distributions of scattered atoms...
Prof.
Alexander Lobko
(Institute for Nuclear Problems, Belarus State University)
07/10/2014, 17:00
Poster
In the report we will describe fabrication and characterisation of nanodiamond targets for accelerator x-ray experiments.
Prof.
Vladimir Vysotskii
(Kiev National Shevchenko Univ, Kiev, Ukraine)
07/10/2014, 17:00
Poster
The problem of creation of effective short-focus X-ray optics is discussed. In our works was investigated the problem of effective multiple transformation of pulse X-ray radiation to acoustic shock waves and acoustic shock waves to X-ray radiation at the interfaces of different media (e.g. air and metal) without phase distortion. In our experiments it was found that the impact of shock...
Mr
Vasily Sukharev
(National Research Nuclear University MEPhI)
07/10/2014, 17:00
Poster
The phenomenon of anomalous reflection of X-rays, i.e. origination of non-mirror peak of angular spectrum of scattered radiation from rough surface near angle of total reflection, was discovered about fifty years ago [1]. The same phenomenon was discovered for thermal and diffusive Compton-scattered gamma-rays as well [2]. Later works demonstrated that when grazing angle is close to angle of...
Giacomo Germogli
(FE)
07/10/2014, 17:00
Poster
In the last years, thanks to innovative techniques for crystals design and fabrication, based on silicon micromachining, it was possible to realize bent crystals for beam manipulation through coherent interactions, thin enough to avoid the loss of deflection efficiency caused by dechanneling, while maintaining the crystal structure perfectly intact. The realization of such thin bent crystals...
Mr
Yury Cherepennikov
(Tomsk Polytechnic University)
07/10/2014, 17:00
Poster
Nowadays X-ray absorptiometry is widely used in the X-ray structural analysis [1]. Moreover, this approach can be applied to elemental analysis of substance [2]. Another important applied task in which X-ray absorption approach is used is content control of components in media containing limited number of fractions, e.g. composition control of two- and three-component media that industry needs...
Prof.
Yury Pivovarov
(National Research Tomsk Polytechnic University)
07/10/2014, 17:00
Poster
We present the results of calculations of the neutron yield using CR generated by initial electrons with energies 200 - 1600. MeV (SPARC Facility, LNF) focused on Be and D targets. The comparison with other methods of generation of fast neutron beams (with neutron energy up to several MeV) is performed, especially with so called “neutron focus in the field of synchrotron radiation”.
Mr
Sergei Stuchebrov
(Tomsk Polytechnic University)
07/10/2014, 17:00
Poster
Reduce the problem of dose loads on biological objects engaged for several decades, especially in the methods of X-ray computed tomography.
The problem of decreasing of dose rate for the biological objects is highly relevant for a last few decades. This is especially important in X-ray computer tomography methods. There are few approaches to solve this problem. One of the most effective of...
Prof.
Nikolai Shul'ga
(Akhiezer Institute for Theoretical Physics of NSC KIPT)
07/10/2014, 17:00
Poster
The scattering of the plane electromagnetic wave on the fiber-like target is considered. The formula for the scattering cross section is used for building the kinetic equation that describes the propagation of the radiation in the rope of parallel fibers. The approach to building the kinetic equation is analogous to one applied in the description of multiple scattering of particles in...
Claudia Polese
(LNF)
07/10/2014, 17:00
Poster
Micro-XRF is a powerful instrument for the non-destructive characterization of materials of cultural interest.
At XLab Frascati this technique is already well performed thanks to polyCO set equipment. For instance, micro-XRF 2D mapping have been carried out on different samples, such as painting layers, adobe and pottery.
However, in the cultural heritage field "in situ" analysis are often...
Mr
Fedor Mikhailov
(Nikolaevich)
07/10/2014, 17:00
Poster
We study the mechanical properties of the carbine. Model is an array of long chains of 13 nm, located in the cell with periodic boundaries on the sides. At a temperature of 300K, the model is the longitudinal tension. Results on the change of the interatomic bonds, calculated Young's modulus ≈ 0.15 TPa whose order is consistent with the recently published work [1].
References
1. A.K. Nair,...
Dr
Vahan Kocharyan
(Institute of Applied Problems of Physics of NAS RA, 0014, Hr. Nersisyan str. 25, Yerevan, Armenia. National Research Tomsk Polytechnic University 634050, Lenin Avenue 30, Tomsk, Russia)
07/10/2014, 17:00
Poster
In the works [1] it was first observed that the phenomenon of the full pumping of X-rays from transmitted direction to the reflection direction in single quartz crystals in the Laue geometry under the influence of the temperature gradient or acoustic vibrations. In work [2] it is shown that the angular width of the full pumping radiation is directly proportional to the thickness of the sample....
Dr
Vardan Margaryan
(Institute of Applied Problems of Physics of NAS RA, 0014, Hr. Nersisyan str. 25, Yerevan, Armenia)
07/10/2014, 17:00
Poster
In the works [1,2] it was first observed that the phenomenon of the full pumping of X-rays from transmitted direction to the reflection direction in single quartz crystals in the Laue geometry under the influence of the temperature gradient or acoustic vibrations. In work [3] it was experimentally and theoretically shown that with the help of an acoustic field and temperature gradient it is...
Prof.
Sergey Blazhevich
(Belgorod National Research University)
07/10/2014, 17:15
In the present work a theory of coherent radiation of a relativistic electron moving at a constant speed in a combined target, consisting of several amorphous matter layers and a monocrystalline layer is built. The expressions describing the amplitudes of diffracted transition radiation (DTR) and parametric X-ray radiation (PXR) are derived in the framework of two-wave approach of the dynamic...
Dr
Oleg Bogdanov
(LNF&TPU)
07/10/2014, 17:30
The well-known Tamm-Frank theory [1] describes the Cherenkov radiation (ChR) from relativistic charged particles moving uniformly and rectilinearly in an optically transparent radiator. There are two main reasons leading to deviations from this ideal character of motion: 1) multiple scattering – particle’s velocity vector changes [2]; 2) stopping in a radiator – particle’s velocity magnitude...
Dr
Erine Babakhanyan
(National Research Laboratory after A.I. Alikhanian (Yerevan Physics Institute), Armenia)
07/10/2014, 17:45
Consideration of moving of the fast charged particle in crystals within the classical theory framework is possible for protons, ions and other heavy particles of a specific range of energies, whereas for positrons and especially for electrons due to the presence of diffraction effects it is necessary the quantum description.
Redistribution of density of electrons and positrons during their...
Dr
Arsen Ghalumyan
(A. Alikhanian National Laboratory (Yerevan Physics Institute), Armenia, 0036, Alikhanian Br. Str. 2)
07/10/2014, 18:00
The work is devoted to the suppression of a few peaks in spectral distribution of coherent bremsstrahlung radiation of the relativistic electrons with 40-50 MeV energy and obtaining of new coherent intensive peaks at the presence of external acoustic field of 1.024 GHz frequency. It was experimentally shown that a new peak appear in the range of ~1keV. The quartz single crystal of X cut with...
Dr
Uli Wienands
(SLAC)
08/10/2014, 09:00
Invited talk
Comparatively little data exists for channeling and volume-reflection of electrons in the 1 to 10 GeV energy range. In this talk I will report on recent experiments at SLAC on channeling and volume reflection of a high-energy electron beam using a 60 micron thick quasimosaic Si(111) crystal. The experiments were done at several beam energies in the range of 3 to above 10 GeV. We have observed...
Prof.
Joseph REMILLIEUX
(Institut de Physique Nucléaire de Lyon)
08/10/2014, 09:30
After a short review of the past and recent activities of the Lyon group on high energy particle channeling (with heavy ions, electron and positron beams) and applications, in particular a powerful positron source dedicated to linear colliders using axial channeling radiation, we will concentrate on the experimental investigation of the internal clock, predicted for any particle by Louis de...
08/10/2014, 09:45
Mr
Esteban Irribarra
(BelSU)
08/10/2014, 10:00
Elastic and inelastic processes take place in tapered glass capillaries within the guiding of the beam of electrons. We represent the study of the energy spectrum and intensity dependence of the guided beam of 10 keV electrons on the tilt angle of the tapered glass tube with respect to the beam axis. Experimental results show not only the possibility to guide electrons using macro size...
Mr
Stylianos Sarros
(University of Athens)
08/10/2014, 10:15
Channeling of 10 MeV protons in various types of radially compressed chiral carbon nanotubes is considered. Monte Carlo simulation program is used for the calculation of the trajectories, energy losses and angular distributions of protons in nanotubes of various lengths, where the potential in Doyle-Turner approximation is used to describe the interaction between a proton and a nanotube....
Dr
Gennadiy Filippov
(Cheboksary Polytechnic Institute)
08/10/2014, 10:30
The paper is devoted to analysis of influence of spatial dispersion on a point charge imagination near a surface of a dielectric or a metal. The charge imagination sufficiently well describes the polarization field which occurs near a surface in the presence of the external point charge. Usually, in classical electrodynamics (see, e.g. [1]), this problem is solved without taking into account...
Dr
Alexey Rusetskii
(Lebedev Physical Institute RAS, Moscow, Russia), Dr
Mikhail Negodaev
(Lebedev Physical Institute RAS, Moscow, Russia)
08/10/2014, 10:45
At the ion accelerator HELIS [1-4] at the LPI, the neutron yield is investigated in DD reactions within a polycrystalline deuterium-saturated CVD diamond, during an irradiation of its surface by a deuterium ion beam with the energy less than 30 keV. The measurements of the neutron flux in the beam direction are performed in dependence on the target angle, β, with respect to the beam axis....
Prof.
Young-Min Shin
(Northern Illinois University)
08/10/2014, 11:30
Invited talk
In principle, crystals, if excited by a short pulse bunch or a high power laser, can hold acceleration gradient of 0.1 - 10 TeV/m since they have a few orders of magnitude higher ambient charge density than gas-state plasma. In the effort to prove the concept, we have been planning a feasibility test of beam-driven channeling acceleration with a carbon nanotubes (CNTs) target. This talk will...
Dr
Vesna Berec
(Institute of Nuclear Sciences Vinca, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia)
08/10/2014, 12:00
As charged particles impinge on atomic planes of a crystalline structure at an angle lower than the so called “critical angle”, planar channeling occurs. Under such condition the particle does not see the material as a disordered medium, and collisions with atoms of the crystal lattice are correlated. Particle is confined between two neighbor atomic planes, and its motion is characterized by...
Prof.
Alexander Kovalenko
(Joint Institute for Nuclear Research)
08/10/2014, 12:15
Proposal on the crystal assisted extraction of halo particles from a new 100 TeV proton collider which is under study in CERN is presented. It is suggested to produce a horisontal dogleg with the Lambertson magnet in a straight section of the collider as it was planned for a Super Fixed Target Beauty Fasility at the SSC. In this case the deflection angle of about 100 μrad or even smaller may...
Prof.
Yury Chesnokov
(IHEP)
08/10/2014, 12:30
Phenomenon of deflection of charged particle beam due to channeling in a bent crystal is good investigated and successfully applied for extraction of beam in high-energy accelerators, at the energies of about 10 GeV and higher. However, a big practical interest presents the task of bending and extraction of charged particles with energies below 1 GeV, for example, production of ultrastable...
Danilo Giulietti
(PI)
08/10/2014, 18:30
Round Table
The propagation of super-intense and ultra-short laser pulses in plasmas is a main concern in several applications of the laser-plasma interactions, from ICF to HEP. During the propagation in the plasma the light beam deeply changes its parameters, due to the onset of non-linear effects, among them the relativistic regime of the electron quivering motion. These extreme conditions are suitable...
Prof.
Alexander Potylitsyn
(Tomsk Polytechnic University)
09/10/2014, 09:00
Invited talk
The mechanisms of Thomson and Compton scattering under linear and nonlinear interactions between relativistic electrons and counter propagated intense laser wave are considered. The quantum consideration of the Compton scattering process allows to calculate a probability of a few successive collisions k of an electron with laser photons accompanying by absorption of n photons (nonlinear regime...
Prof.
Karo Ispirian
(A. Alikhanyan National Laboratory (Yerevan Physics Institute), Brothers Alikhanians, 2, Yerevan, 0036, Armenia)
09/10/2014, 09:30
Invited talk
It is given a short discussion of the existing publications [1] devoted to the analytical and numerical study of the motion of electrons in various laser fields as well as a consideration of the complicated expressions of the laser fields and relatively simple expressions which are satisfactory approximations corresponding to the measured intensity profiles of really existing beams. Then...
Mr
Evgenii Frolov
(LPI RAS and NR TPU)
09/10/2014, 10:00
The questions of electron beam-laser interaction form a vast research area involving a great number of scientists all over the world. Thomson scattering, charged particles laser acceleration, laser wakefield acceleration and beam longitudinal phase space manipulation are probably the most popular aspects of laser-beam interaction research.
Nevertheless more and more work these days is...
Dr
Dennis Thomas Palmer
(MI)
09/10/2014, 10:15
The Southern european Thomson source for Applied Research (STAR) project ultimate goal is to install, commission and operate a dedicated user facility that produces monochromatic tunable, ps-long, polarized X-ray beams, ranging from 20 to 140 keV. These X-rays will be devoted to peer reviewed experiments dealing with material science, artifacts of archeological significance and advanced...
Mr
Xavier Artru
(IPNL, Université de Lyon-I and CNRS/IN2P3)
09/10/2014, 10:30
Synchroton radiation and light escaping a bent optical fiber are very similar. In both cases the photons are emitted at some impact parameter (IP) away from the electron trajectory or from the fiber. The IP profile is a Airy function, the fringes of which are interferences between two emission points. Optical systems for observing these fringes are suggested.
Dr
Pavel Karataev
(Royal Holloway, Unviersity of London)
09/10/2014, 10:45
Diffraction Radiation (DR) is generated when a charged particle moves in the vicinity of a medium (e.g. passes through an opening in a conducting screen in vacuum). Non-invasive nature and a broad DR radiation spectrum enables to develop non-invasive beam diagnostics instrumentation for a variety of particle beam parameters, e.g. transverse beam size and position, emittance, bunch length, beam...
Alexey Petrenko
(CERN, Budker INP), Prof.
Allen Caldwell
(Managing Director, Max Planck Institute for Physics)
09/10/2014, 11:30
Invited talk
AWAKE is a proton-driven PWFA experiment planned to start in late 2016 at CERN. It is in its planning and design phase. An update on the experimental setup as well as the current experimental plan will be presented.
Prof.
Victor Malka
(LOA (CNRS/ENSTA/Ecole Polytechnique))
09/10/2014, 12:00
Invited talk
Ultra-bright femtosecond X-ray pulses resulting from the laser beam interacting with a plasma medium have been successfully developed this last decade. An important role in the development of the compact X-ray sources, is given to the laser plasma accelerators, that deliver today high quality and high peak current electron beams. I present here a review of the different schemes that allow to...
Dr
giuseppe dattoli
(enea)
09/10/2014, 12:30
Invited talk
Scattering processes which cannot be treated in dipole approximation demand for the use of analytical tools going beyond the ordinary special functions and in particular beyond the use of cylindrical Bessel function of first kind. The emission of radiation by relativistic electrons in linearly magnetic undulator and the scattering by intense laser radiation as well require the use of “new”...
Massimo Ferrario
(LNF)
09/10/2014, 14:30
Invited talk
A test facility named SPARC_LAB (Sources for Plasma Accelerators and Radiation Compton with Lasers and Beams) is in operation at the INFN National Labs in Frascati, merging the potentialities of an ultra-brilliant electron beam photoinjector and of a high power Ti:Sa laser. The test facility is hosting a 150 MeV high brightness electron beam injector which feeds a 12 meters long undulator....
Leonida Antonio Gizzi
(PI)
09/10/2014, 15:00
Invited talk
Ultraintense lasers are now delivering high peak power beyond the PW level, with pulse duration as short as 20 fs. Laser-driven acceleration in mm-sized plasmas using multi- TW laser systems is now established for the generation of high energy electron bunches. Depending on the acceleration regime, electrons can be used directly for applications such as radiobiology and radiotherapy or for...
Dr
Marco Galimberti
(Science and Technology Facilities Council)
09/10/2014, 15:30
The development of the ultrafast laser technology has enabled the generation of laser pulses with peak powers in the 1PW regime, opening up new fields of research and possible applications. Projects have been established to go beyond the 1PW level pushing laser technology to the limit.
Whilst, there have been significant advances in the peak power of laser systems, the repetition rate of...
Dr
Marco Galimberti
(Science and Technology Facilities Council), Mr
Mario Galletti
(Univeristà di Pisa)
09/10/2014, 15:45
The characterization of the ultra-short high power laser pulses has always been a challenge.
It requires using the same pulse to measure itself because do not exist an event shorter to compare to.
In addition to that, there are also many other difficulties both for the pulse itself (no-linear effects, distortion, etc.) and for the complexity of the set up (alignment, devices, etc.)...
Prof.
Danilo Giulietti
(University and INFN, Pisa)
09/10/2014, 16:30
Invited talk
The importance of stable and reproducible plasma channels is strongly connected to the need of guiding high intensity laser pulses in different experimental contexts from the remote sensing, to Inertial Confinement Fusion and Laser Plasma Acceleration. In particular, one of the major tasks for the progress of laser acceleration of electrons in plasmas is the guiding of focused pulses along...
Andrea Liedl
(LNF)
09/10/2014, 17:00
Poster
A novel study about different types of polycapillary optics utilization is presented. The scope of this study is to achieve efficient radiation collimation that avoids total external reflection into the capillary channel. For this purpose a vibration is induced to emulate a "virtual roughness" on the channel surface.
The transmission properties of the system is studied at different...
Dr
Valentina Trunova
(1A.V. Nikolaev Institute of Inorganic Chemistry SB RAS)
09/10/2014, 17:00
Poster
The availability of right reference sample with certified concentrations of all elements of interest often becomes a problem in the SRXRF analysis because of a wide range of objects with different matrices and varieties of element content to analyze. In this case, the mass attenuation coefficients of characteristic radiation in matrices to analyze can be applied to absorption correction, and...
Dr
Szabina Torok
(HAS Centre for Energy Research, Budapest)
09/10/2014, 17:00
Poster
Different neutron guide materials are selected for the future European Spallation Source under construction in Lund, Sweden. Many charged particle and neutron sources around the globe have never considered the activation of beam material being exposed to the ionizing radiation. When the operation is terminated or refurbishment of beam lines becomes necessary the beam line scientists face the...
Prof.
Akbarali Rasulov
(Andijan State University, University Str. 129, 110020 Andijan, Uzbekistan)
09/10/2014, 17:00
Poster
Ion implantation has become a very important technique for modifying surface and impurity doping of semiconductors. The ion implantation processes lead to change of a profile of composition and structure of the subsurface layers. Using glancing-angle ion implantation for surface modification rather than conventional near-normal incidence ions allows expanding the energy range up to ~10 keV and...
Dr
Yuichi Takabayashi
(SAGA Light Source)
09/10/2014, 17:00
Poster
Channeling phenomena have been extensively studied using mainly single crystals as targets. In this report, we present experimental results on channeling effects for 255-MeV electrons in a Mo polycrystal. Its applications to beam manipulation techniques and radiation sources are also discussed.
Dr
Behnam Azadegan
(Hakim Sabzevari University, Physics department)
09/10/2014, 17:00
Poster
Louis de Broglie predicted that the electron has an internal clock oscillating with frequency ν_B=(m_e c^2)/h determined by its rest mass me [1]. He then deduced that the frequency of a moving electron observed in a laboratory will be ν_L=ν_B/γ where γ is the relativistic time dilation factor. Detecting the internal electron clock seemed out of the question because of the ultrahigh frequency...
Mr
Andrey Oleinik
(BelSU)
09/10/2014, 17:00
Poster
Turning of non-relativistic electron beam in the transverse electric field created by pyroelectic crystals is shown experimentally for the first time. The angle of the beam bending is measured and the value of the transverse electric field is estimated. Prospects for application of pyroelectric crystals for steering of particle beams are discussed.
Prof.
Nikolai Shul'ga
(Akhiezer Institute for Theoretical Physics of NSC KIPT)
09/10/2014, 17:00
Poster
The probability of close interactions of high-energy positively and negatively charged particles with atoms in a bent crystal was considered as a function of the angle between the initial particle momentum and the bending plane. The results of simulation of positively charged particle motion in a bent crystal show the great efficiency of high-energy positively charged particle deflection by a...
Dr
Anatoly Sabirov
(Chuvash State University, Cheboksary, Russia)
09/10/2014, 17:00
Poster
A great number of papers are devoted to theoretical investigation of the atomic particle channeling in nanotubes. As a rule the nanotubes with ideal structure are considered for which thin effects connected with the scattering on atoms and electrons are taken into account. Actually the real nanotubes always have imperfections one of them is their curved shape. In this work we attempt to...
Dr
Alexander Shchagin
(Kharkov Institute of Physics and Tecknology)
09/10/2014, 17:00
Poster
A.V. Shchagin1,2, N.F. Shul’ga1,3, S.V. Trofymenko1
1Kharkov Institute of Physics and Technology, Kharkov, Ukraine
2Belgorod State University, Belgorod, Russia
3Kharkov National University, Kharkov, Ukraine
The thickness of the depleted zone in a partially depleted semiconductor detector can be smoothly changed by variation of high voltage power supply of the detector [1]. In present...
Dr
Alexander Shchagin
(Kharkov Institute of Physics and Tecknology)
09/10/2014, 17:00
Poster
O.C. Druj, V.V. Yegorenkov, A.V. Shchagin, V.B. Yuferov
Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine
The deflection of the electron beam passing through a bent glass tube without any external power supply is shown experimentally. The incident electron beam was produced by the inductive accelerator with energy 200 keV, current 10 kA, duration 100 ns. The glass tube...
Prof.
Karo Ispirian
(A. Alikhanyan National Laboratory (Yerevan Physics Institute), Brothers Alikhanians, 2, Yerevan, 0036, Armenia)
09/10/2014, 17:00
Poster
Many recent analytical and numerical calculations show that stable electron acceleration in vacuum and production of attosecond electron bunches are possible only with the help of very high intensity laser beams, while the calculations [1] carried out only in plane wave approximation show that weaker laser beams are required in order to obtain significant transversal deflection of high energy...
Ms
Irina Lysova
(Chuvash State Pedagogical University)
09/10/2014, 17:00
Poster
In modern works by channeling in carbon nanotubes treated basically the process of ion [1] and the proton channeling. In our work, we have attempted to examine the process of channeling atomic flux consisting of 50 or more particles. Basic atoms that were considered is O, H, N.
In the simulation, we used LAMMPS [2] with developing interatomic potentials ReaxFF. Currently, we investigated the...
Mr
Yuriy Shtanov
(Nikolaevich)
09/10/2014, 17:00
Poster
Modeling the deflection of 855 MeV electrons in (111) the planar channels bent crystal silicon performed by numerically solving the kinetic Fokker−Planck equation in the phase space of the transverse coordinates and velocities. It is shown that the simulation results do not describe the experiment.
Prof.
Nikolay Kalashnikov
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, Russia)
09/10/2014, 17:00
Poster
The channeling particles is characterized by the bound quantum states of its transversal motion. Photon interactions with the channeling particles in a single crystal may be accompanied by the energy transitions between the transverse motion levels of channeling particles. The photon combination (Raman) scattering by the quasi-bound channeling particles leads to the appearance of a frequency...
Mr
Yuri Eykhorn
(National Research Tomsk Polytechnic University)
09/10/2014, 17:00
Poster
It is shown that the band structure which calculated by the proposed method, agrees with the results obtained by the standard method - by the transformation of the Schrödinger equation with relativistic mass into an algebraic equation using the Fourier series [2-3]. Comparison carried out both for a periodic Pöschl-Teller potential and for the "real" average periodic potential of (220) planes...
Mr
Alexey Dik
(Lebedev Physical Institute of Russian Academy of Science)
09/10/2014, 17:00
Poster
Since the first work on the phenomenology of charged beams channeling in the field of aligned crystals the interest of physicists to this feature of the beam motion in solids is defined by the possibilities of beam manipulation that aims in the beam shaping (crystal collimation) as well as in the radiation release (channeling radiation) [1, 2, 3].
Known and recent studies on interaction of...
Prof.
Igor Vnukov
(Belgorod sate university, Belgorod, Russia)
09/10/2014, 17:00
Poster
It is well known that microstructure of the crystals essentially influence on interaction processes of fast particles and quanta. On the base of approaches developed for description of X-ray diffraction in mosaic crystals type a and b influence of crystals microstructures on emission observed characteristics such as parametric X-ray radiation and real photons of bremsstrahlung and transition...
Mr
Anton Stepanov
(Cheboksary Polytechnic Institute, Cheboksary, Russian Federation), Dr
Gennadiy Filippov
(Cheboksary Polytechnic Institute)
09/10/2014, 17:00
Poster
Slow particles channeling in carbon nanotubes (CNT) is applicable to physical vapor deposition processes (PVD), ion beam assisted deposition (IBAD), focused ion beam (FIB) modification of thin film materials and driving of ion beam. Slow moving channeling particles in CNTs may excite elastic waves of the nanotube walls [1]. We provide molecular dynamic simulation of 100 eV Ar+ ion channeling...
Mr
Aleksei Ivanov
(Russian)
09/10/2014, 17:00
Poster
In this paper analyzes the process of dynamic screening of external charges, moving over the surface of graphene disposed on a substrate. We are considered here relatively slow ions with velocities from thermal speeds to Bohr velocity. We explore here the effects of dynamic polarization of graphene on a substrate by ion motion parallel to its surface. We limited the study of the effects...
Dr
Gennady Kovalev
(UofM)
09/10/2014, 17:00
Poster
It is well known that main source of orthogonal coordinate systems is a conformal transformation, but the use of analytical functions
for separation of Schrodinger or Helmholtz equations in 2D space is restricted to only 4 coordinate systems: Cartesian, polar, parabolic and elliptic. The first 3 coordinate systems are unique and can be considered as degenerated cases of the last one. In...
Ishmumin Yadgarov
(1Institute of Ion-Plasma and Laser Technologies, Tashkent, Uzekistan)
09/10/2014, 17:00
Poster
Using molecular dynamics method with Brenner interatomic potential [1], we studied the channeling of ideally collimated beam of hydrogen atoms (1000 atoms, 100-250eV/atom) through carbon nanotubes (CNT). CNT with diameter of 13.6 angstroms were placed in one plane, parallel to each other at a distance apart 3 angstroms. Hydrogen atoms are directed along the axes of the tubes. During H...
Mr
Yury Gavrikov
(PNPI)
09/10/2014, 17:00
Poster
Since experiment at circulating beam of CERN Super Proton Synchrotron has been started in 2009 the need of crystal positioning became a crucial for success of experiment. The present status of experiment on crystal collimation study, experience of development and using of goniometers at CERN SPS is presented.
The working principle, features and performance of goniometers which have been...
Mr
Yury Gavrikov
(PNPI)
09/10/2014, 17:00
Poster
Crystal channelling and collimation experiments are based on precise angular orientation of crystals provided by linear and rotational stages. Autocollimation principle is one of the most optimal, direct and contactless method widely used for precise angular measurements.
In the frame of UA9 crystal collimation experiment at CERN different type of commercial and custom made autocollimators...
Dr
Valery Nikoghosyan
(A. Alikhanian National Laboratory (Yerevan Physics Institute), Armenia, 0036, Alikhanian Br. Str. 2)
09/10/2014, 17:00
Poster
A.R. Mkrtchyan, A.H. Mkrtchyan, A.A. Saharian, V.R. Kocharyan, A.S. Ghalumyan, V.Ts. Nikoghosyan, A.Z. Babayan, E.M. Harutyunyan, V.V. Nalbandyan, H.R. Muradyan, G.A. Ayvazyan, A.I. Soghomonyan, V.V. Margaryan, A.E. Movsisyan, E.H. Baghdasaryan, S.A. Miraqyan
The work is devoted to the suppression of noncoherent bremsstrahlung radiation of the relativistic electrons with 40-50 MeV energy...
Vladimir Shpakov
(LNF)
09/10/2014, 17:00
Poster
Advanced accelerator technology, based on plasma structures, produce high brightness electron beams, which can be used to drive advanced radiation sources. Indeed, electron beams to be injected into the plasma and
accelerated in the plasma channel are characterized by small transverse size and ultra-short time duration,
allowing the production of coherent radiation in the THz range. In...
Dr
Bruno Paroli
(Universita degli Studi di MIlano)
09/10/2014, 17:00
Poster
Simulation and detection of betatron radiation in laser-wakefield acceleration are important tasks because they can reveal theoretical and practical information about beam properties in beam-plasma interaction. We present the results of a 3-dimensional simulation with particular attention to the coherence of the radiation. Furthermore we discuss about a single-shot diagnostics to map the...
Prof.
Vladimir Vysotskii
(Kiev National Shevchenko Univ, Kiev, Ukraine)
09/10/2014, 17:00
Poster
The problem of optimization of "accelerating (beam)" fusion in crystal lattice is discussed. It is shown that in monocrystal targets like LiD the rate of fusion process with the participation of both target nuclei and beam of fast nuclei, directed at Lindhard angle, may be increased by 10-100 times compared to the alternative process of deceleration on atomic electrons. Such changes are based...
Dr
Vladimir Zvorykin
(P.N. Lebedev Physical Institute)
09/10/2014, 17:30
Multiple filamentation of UV picosecond pulses being amplified in hybrid Ti:Sapphire/KrF laser facility GARPUN-MTW was investigated under propagation in atmospheric air over ~100 m. Peak pulse power attained 0.3 TW, which is in 3000 times higher than the critical value (~0.1 GW) for filamentation of 248 nm wavelength radiation. In contrast to 100-fs pulses significant distinctive features (3...
Prof.
Lorenzo Torrisi
(University of Messina)
09/10/2014, 17:45
Laser-matter interaction in regime of Target Normal Sheath Acceleration (TNSA) confers to ions energies above 1.0 MeV per charge state. The ion acceleration strongly depends on the laser parameters (intensity, wavelength, pulse duration,…), irradiation conditions (spot size, incidence angle, focalization with respect to the target surface,…) and target properties (composition and...
Mr
Alessandro Curcio
(University and INFN Pisa)
09/10/2014, 18:00
Developments in laser technology with regard to infrared and visible light have been a rather fast and fairly easy process, for the availability of technologies capable of producing coherent, brilliant light in those ranges from the very beginning. Not the same fate befell ultraviolet and X-rays light technologies that had been stuck in their initial stage, not so much progressed since the...
Dr
Stefano Redaelli
(CERN)
10/10/2014, 09:00
Invited talk
Two bent crystals have been installed in the Large Hadron Collider (LHC) for crystal collimation studies of horizontal and vertical halos, with proton and ion beams at energies close to 7*Z TeV. In addition to demonstrating the feasibility of crystal channeling at these unprecedented beam energies, these tests are targeted at addressing specific beam collimation issues at the LHC and its High...
Dr
Alexander Taratin
(Joint Institute for Nuclear Research)
10/10/2014, 09:50
The process of multiple scattering of high energy protons in a silicon crystal at its amorphous orientation was studied by simulation of proton trajectories in the model of binary collisions and by simulation of the sequences of proton collisions with atoms when their impact paramters are randomly and uniformly distributed on the symmetry cell for a given crystallography direction. The value...
Dr
Philippe Schoofs
(CERN)
10/10/2014, 10:30
Channeling in bent crystals is more and more frequently considered as an option for collimating high-energy beams. The installation of crystals in the LHC, having taken place during this past year, aims at demonstrating the feasibility of multi-stage crystal-assisted collimation and possibly improving cleaning efficiency [1]. Energy deposition studies in the LHC are routinely performed with...
Mr
Daniele Mirarchi
(CERN)
10/10/2014, 10:50
A routine has been developed to simulate interactions of protons with bent crystals in the collimation version of SixTrack. This routine is optimized in view of producing high-statistics tracking simulations for the highly efficient LHC collimation system. The routine has recently been reviewed after detailed comparison with experimental data, benchmark with other codes and improved modelling...
Dr
Yury Ivanov
(Petersburg Nuclear Physics Institute)
10/10/2014, 11:50
In 2013-2014, the advanced quasi-mosaic silicon crystal deflectors for UA9/LUA9 Collimation Project were developed and installed in LHC ring. The design of deflectors is based on elastic quasi-mosaicity effect firstly discovered in quartz [1] and later observed in silicon [2]. This effect arises from anisotropic properties of crystal lattice and results in the curving of the normal cross...
Dr
Alessandro Masi
(CERN)
10/10/2014, 12:10
An innovative piezo goniometer that fully fulfils all the requirements for the channeling experiment in the LHC is presented. The piezo rotational stage is based on a specifically designed flexural structure with closed loop position control using a high accuracy interferometric angular sensor. The design guidelines as well as the experimental validation results are also presented.
Mr
Alexei Sytov
(Research Institute for Nuclear Problems)
10/10/2014, 12:30
Both long-lasting UA9 studies and coming Large Hadron Collider collimation and extraction experiments strengthen the need to develop reliable codes for the modelling of the proton interaction with bent crystals.
A CRYSTAL simulation code [1] for particle tracking in crystal is introduced. Its essence consists in both adequate and fast evaluation of proton trajectories in crystals with all...
Dr
Davide De Salvador
(INFN-LNL and Padova University)
10/10/2014, 13:10
Most of the experimental knowledge about channeling and related phenomena in bent crystals has been gathered with Si, thanks to its high crystalline quality and mature micro-machining technology. Silicon is not optimized as a far as it concerns the interaction strength with beams since of it’s relatively low z-number. We recently demonstrated that germanium can be a concrete alternative. It is...
Francesca Galluccio
(NA)
10/10/2014, 13:30
Dr
Konstantin Batrakov
(Institute for Nuclear Problems, Belarus State University)
Oral
Parametric (quasi-Cherenkov)radiation mechanism utilizes crystal periodicity, which provides Cherenkov condition for wave synchronism with electron beam and, simultaneously, two-wave(or multi-wave) distributed feedback. As result, generation process can develop on shorter "beam - wave" interaction length. This mechanism was proposed earlier as the candidate for XFEL generation [1, 2]. The...
Prof.
khalid chouffani
(Idaho Accelerator Center)
Oral
Laser-Compton Scattering (LCS) is the exchange of energy between a relativistic electron beam and a laser beam. Laser photons interact with high-energy moving electrons (in the MeV region or higher) and the electrons scatter these low energy photons to a higher energy at the expense of the electrons’ kinetic energy. This interaction results in the emission of highly directed,...
Dr
Artak Mkrtchyan
(Institute of Applied Problems of Physics of NAS RA, 0014, Hr. Nersisyan str. 25, Yerevan, Armenia)
Invited talk
Review of Scientific Works of the Institute of Applied Problems of Physics of NAS RA
Prof.
Aram Saharian
(Institute of Applied Problems in Physics)
Oral
We investigate the coherent bremsstrahlung of soft X-rays from 50 MeV electrons moving in a single crystal under the influence of hypersonic waves. The consideration is done for an arbitrary profile of the deformation field generated by the hypersound. The coherent effectsdominate when the electron enters into the crystal at small angles with respect to a crystallographic axis. With dependence...
Prof.
Viktor Tikhomirov
(Research Institute for Nuclear Problems)
Recently a start for the 100 TeV p-p Future circular collider (FCC) project was given. Earlier a proton energy increase up to 33/2 TeV began to be studied in the framework of the high-energy phase of the LHC upgrade. The energies of the secondary e± and γ will reach many TeVs in the high pseudorapidity regions at both FCC and HE-LHC. The point is that these e±, γ energies are high enough to...
