Conveners
PS2 - Poster session
- Sergey Galyamin (Saint Petersburg State University)
Prof.
Alexander Potylitsyn
(Tomsk Polytechnic University)
25/09/2018, 18:40
Poster
Femtosecond and sub-femtosecond electron pulses are used in different scientific fields (pump-probe experiments, laser-driven acceleration, ultrafast electron diffraction, etc.). Diagnostics tools for such ultrashort electron bunches have to be developed parallel to the progress of accelerator technologies.
In the paper [1] the coherent transition radiation process is proposed to measure not...
Prof.
Vladimir Baryshevsky
(Research Institute for Nuclear Problems)
25/09/2018, 18:40
Poster
The electrostatic cumulation of current density in relativistic vacuum diodes with ring-type cathodes is described theoretically and confirmed experimentally. The distinctive feature of the suggested cumulation mechanism is a very low energy spread of electrons. As a result of electrostatic cumulation, a thin relativistic electron beam with a current density of 1 kA/mm2 can be formed. This...
Dr
Dmitry Shkitov
(National Research Tomsk Polytechnic University)
25/09/2018, 18:40
Poster
The Grating Diffraction Radiation (GDR) mechanism can provide monochromatic beams in THz and sub-THz ranges with a possibility of the spectral line tuning [1]. Additional advantage of this mechanism is connected with its flexible polarization characteristics. In contrast with THz beams generated via the transition radiation (TR) mechanism [2], where polarization is radial, for the GDR case (as...
Dr
Anatoly Konkov
(Tomsk Polytechnic University)
25/09/2018, 18:40
Poster
Some eight decades after the first experimental observation of the polarization radiation mechanism, new systems of particle acceleration, beam diagnostics and radiation sources are still being designed and implemented, illustrating the continued and dynamic interest in this unique physical phenomenon. Polarization radiation, like many other processes of the particle-medium interaction, brings...
Prof.
Andrey Tyukhtin
(Saint Petersburg State University)
25/09/2018, 18:40
Poster
We study a "longwave" radiation of a charge moving along a corrugated structure perpendicularly to its grooves. The wavelengths under consideration are assumed to be much more than the period and the depth of corrugations. The real surface is replaced with the plane on which equivalent boundary conditions are set. It is shown that relativistic charge can generate surface waves. The detailed...
Prof.
Vladimir Vysotskii
(Kiev National Shevchenko Univ, Kiev, Ukraine)
25/09/2018, 18:40
Poster
Controlled long-distance transportation of neutral particle beams is one of the most interesting problems of atomic physics. Some features of the interaction of moving neutral atoms, molecules and clusters with a superlattice field (e.g., crystal lattice and system of magnetic or electric domains) were considered in [1]. In our new paper we consider the possibility of using the...
Mr
Aleksandr Baryshnikov
(NRNU MEPhI)
26/09/2018, 18:40
Poster
Capillary optics is one of the best tools for controlling X-ray radiation. It allows handling the X-ray beams, which pass through many materials practically without breaking and much loss of intensity, with the correct selection of the parameters of the optics and the source of radiation.
In order to proper calculate the experiment as well as to define optimized optics it is necessary to...
Dr
Rozhkova Elena
(National Research Tomsk Polytechnic University)
26/09/2018, 18:40
Poster
Properties of spectral and angular distributions of Cherenkov radiation (ChR) from relativistic heavy ions (RHI) in solid radiators taking account of their slowing-down have been recently investigated [1-3]. The obtained new peculiarities such as the bright diffraction like structure showed that not all features of ChR are well studied yet while they might be attractive for modern detector...
Prof.
Lorenzo Torrisi
(Dipartimento MIFT, Università di Messina, Italy)
26/09/2018, 18:40
Poster
A compact Thomson parabola spectrometer for diagnostics of laser-generated plasma was built in Messina University to be employed in different experiments. It allows to detect the charge particles emitted from hot and fast plasma separating them per charge state, energy and mass-to-charge ratio. Moreover, it is possible to detect electrons emitted from plasma. It uses a double pin-hole input...
Mr
Yury Cherepennikov
(Tomsk Polytechnic University)
26/09/2018, 18:40
Poster
In this paper, the numerical simulation and the experimental study of the electron beams propagation in polymer materials suitable for the sample production by rapid prototyping technique were carried out [1]. To conduct experimental studies the sets of plates with various thicknesses were made of ABS and HIPS plastics by fused deposition modeling [1]. The combination of these plates allows...
Dr
Valentina Trunova
(Nikolaev Institute of Inorganic Chemistry Siberian Branch of the Russian Academy of Sciences)
26/09/2018, 18:40
Poster
The analysis of bottom settlings by the scanning X-ray fluorescence spectrometry method (SR-XRF scan) is carried out in the context of paleoclimate research.
Comparison of these reconstructed Siberian records with the annual record of air temperature for the Northern Hemisphere shows similar trends in climatic variability over the past 800 yr. Estimated harmonic oscillations of temperature...
Prof.
Szabina Torok
(HAS Centre for Energy Research)
26/09/2018, 18:40
Poster
The objective of the presented cave is to shield users from radiation of a series of macromolecular neutron diffraction experiments planned at European Spallation Source being constructed in Lund Sweden. The design process was iterative considering physical (radiological) and engineering constraints. The vicinity of the cave is considered as supervised area and a factor two was considered as...
Ms
Anush Sargsyan
(Institute of Applied Problems of Physics NAS RA, 25 Hr. Nersessian St.,Yerevan, Armenia)
26/09/2018, 18:40
Poster
The phenomenon of scattering of a plane electromagnetic wave on a conductive ball is studied taking into account the dispersion of electromagnetic waves inside the ball material. The analysis is based on the corresponding exact analytical solutions of Maxwell equations. These solutions are obtained by the method of Green function presented in [1,2].
A visual explanation is given about why...
Dr
Alfio TORRISI
(Nuclear Physics Institute, AS CR)
26/09/2018, 18:40
Poster
Graphene oxide foils implanted by copper ions at low energy and high dose, have been proposed as hybrid graphene based materials suitable to be laser irradiated in vacuum to produce hot plasmas. The special lattice structure of the graphene oxide foil can improve the propagation of the laser accelerated electrons inside the foil and enhance the electron density emerging from the rear foil...
Dr
Nikolai Maksyuta
(Taras Shevchenko National University of Kiev)
26/09/2018, 18:40
Poster
As shown in [1], the radial profile function of the probability density of localization of channeled hydrogen atoms in a carbon nanotube (CNT) has two clearly fixed maxima. One of them (the greater) is in the center of the CNT. The second maximum (smaller) is located in the region of the minimum of the averaged interaction potential of hydrogen atoms with the inner wall of a CNT. It was shown...
Mr
Vito Turco
(Università del Salento - Dipartimento di Matematica e Fisica)
26/09/2018, 18:40
Poster
We study the light scattering by localized quasi planar excitations of a Cholesteric Liquid Crystal known as spherulites. We quantitatively evaluate the cross section of the axis-rotation for polarized light, by taking into account the anisotropic optical properties of the medium and the peculiar shape of the excitations. Because of the complexity of the system under consideration, first we...
Mr
Sergei Stuchebrov
(Tomsk Polytechnic University)
26/09/2018, 18:40
Poster
The report presents result of experimental measurement of gamma radiation beam profile in the cross section. The measurement done using radioactive gamma source Со60. Dielectric fiber located under different angles in the scanned plane is used as sensitive detector. The interaction between gamma radiation and dielectric material causes creation of electrons with energy sufficient to generate...
Dr
Subhendu Ghosh
(Inter University Accelerator Centre)
26/09/2018, 18:40
Poster
A Coherent Synchrotron Radiation source is under construction at Inter University Accelerator Centre, New Delhi. In this project, a train of super-radiant electron microbunches will be created inside a 2.6 cell normal conducting photo-injector and injected in to a compact undulator to produce coherent radiation in the frequency range of 0.18 - 3.0 THz. The synchrotron radiation emitted by an...
Mr
Vladimir Smolyanskiy
(Tomsk Polytechnic University)
26/09/2018, 18:40
Poster
The paper presents the results obtained in the study of the properties of bremsstrahlung generated at the grazing incidence of 18-MeV betatron electrons with narrow targets, 50 μm and 8 μm thick Si crystals and 13 μm thick Ta foil with a length of 4 mm along the electron beam, mounted in an internal goniometer inside the betatron chamber.
The results show strong changes in the angular...
Dr
Luciano Velardi
(Università del Salento, Dipartimento di Matematica e Fisica, LEAS Laboratory, Lecce)
26/09/2018, 18:40
Poster
We present a new method for the hydrogen enrichment of targets for high-power laser-matter interaction. Transition metals (Ta, Ti, Nb, Pd) are known as good H2 adsorbers. After a laser cleaning process (by KrF excimer laser) of thin samples (thickness ~ 10 µm) a constant flow of H2 (6.0 pure) was maintained inside the vessel. Next, we exposed the metal foils to excimer laser irradiation (1500...
Mr
Evgenii Frolov
(LPI RAS and NR TPU)
26/09/2018, 18:40
Oral presentation
Charged particles interaction with high-intensity optical lattice is often referred to as channeling. Indeed, as was shown previously, charged particles could be trapped, guided, focused or collimated with channels of effective potential, formed in non-uniform laser field [1].
On the one hand, beams shaping and control techniques, based on charged particles channeling in optical lattice,...
Mr
Sergei Stuchebrov
(Tomsk Polytechnic University)
26/09/2018, 18:40
Poster
In this work, we study the features of the passage of an electron beam through polymer samples manufactured using additive technologies with different printing parameters.
The technology of layer-by-layer fusing makes it possible to produce samples with different filling factor by plastic in the volume of the product [1]. For the experimental studies, ten polymer test samples with different...
Prof.
Lorenzo Torrisi
(Dipartimento MIFT, Università di Messina, Italy)
26/09/2018, 18:40
Poster
Advanced targets based on thin films of graphene oxide covered by metallic layers have been irradiated at high laser intensity (1018 - 1019 W/cm2) with 40 fs laser pulses to investigate the forward ion acceleration in the TNSA regime. Time-of-flight technique was employed with silicon-carbide detectors and ion collectors as on-line plasma diagnostics. At the optimized laser focus position with...
Mr
Yury Cherepennikov
(Tomsk Polytechnic University)
26/09/2018, 18:40
Poster
X-ray computed tomography (CT) is one of the most advanced methods for the non-destructive investigation of the internal structures of various objects. Researchers have been developing instrumentations for the CT research over several decades. As a result, some modern units can provide a spatial resolution of about several microns but their contrast resolution is often not high enough for CT...
Mr
Vardazar Kotanjyan
(erevan State University)
26/09/2018, 18:40
Poster
The electromagnetic fields and the energy-momentum tensor are considered for a charged particle rotating in a homogeneous medium from the point of view of a rotating observer. In the corresponding coordinate system there is a horizon and the latter can serve as a simple model for horizons in more complicated problems with gravitational fields.
Prof.
Alpik Mkrtchyan
(Institute of Applied Problems of Physics NAS RA)
26/09/2018, 18:40
Poster
The transparency effect in two wall acoustic tubes at the presence of standing and running acoustic fields excited there which allows to manage all working parameters of transparency.
It has been investigated experimentally and theoretically the dependence of X-ray absorption on the parameters of external acoustic waves [1]. Sharp decrease of the X-ray absorption coefficients has been...
Prof.
Aram Saharian
(Institute of Applied Problems in Physics NAS RA)
26/09/2018, 18:40
Poster
We investigate the electromagnetic fields and the radiation from a charged particle intersecting the boundary between two dielectric media on which surface waves are excited. A formula is derived for the spectral-angular density of the radiation intensity assuming that the amplitude of the surface wave is small compared with the corresponding wavelength. The dependence of the peaks in the...
Mr
Mario Galletti
(Instituto Superior Tecnico, Universidade de Lisboa)
26/09/2018, 18:40
Poster
Coherent light sources in spectral regions which are inaccessible to lasers has been an
important issue for more than five decades. Despite tremendous progress in laser
technology over the last five decades, substantial portions of the optical spectrum from the
ultraviolet (UV) to the infrared (IR) still remain inaccessible to conventional laser sources,
at time scales ranging from...
Dr
Alexey Gogolev
(Tomsk polytechnic university), Dr
Roman Rezaev
(Tomsk polytechnic university)
26/09/2018, 18:40
Poster
The challenge of reliable measurement and diagnostics of extremely short electron bunches is of crucial importance for commissioning and operation of the accelerators like a FELs and colliders. A method widely applied for bunch length diagnostics is Coherent Radiation Diagnostics (CRD). Radiation is emitted coherently if the wavelength is in the order of the bunch length, i.e. information...
