Conveners
PS2: Poster Session
- Luca Marchitto (Istituto Motori- Im)
Prof.
Igor Vnukov
(Belgorod sate university, Belgorod, Russia)
27/09/2016, 18:40
Poster
Yu. A. Goponov1, M.A. Sidnin1, K. Sumitani2, Y. Takabayashi2, I.E. Vnukov1
1) Belgorod National Research University, 14 Studencheskaya str., 308007 Belgorod, Russia
2) SAGA Light Source - 8-7 Yayoigaoka, Tosu, Saga 841-0005, Japan
Recently, in connection with the design of the International Linear Collider [1] and Compact Linear International Collider [2] increased interest in new...
Prof.
Vyacheslav Tlyachev
(AdSU)
27/09/2016, 18:40
Poster
The results of numerical analysis of angular distribution of the radiation of an electron moving on a plane along a circle arc are presented. The numerical values of global extremum of the sigma and pi-components of the linear polarization are determined. The analysis has shown that there are invariant directions where there is always the maximum (minimum) value of the radiation power.
134.
Angular Distributions and Spectra of VUV Radiation Generated by 5.7 MeV Electrons in Multilayer
Dr
Alexander Kubankin
(Belgorod National Research University)
27/09/2016, 18:40
Poster
Recently, in [1,2] radiation generated by the electron beam in a multilayer periodic structure was experimentally observed in the vacuum ultraviolet (VUV) range. The mechanism of this radiation is similar to the parametric X-ray radiation (PXR) of relativistic charged particles in crystals [3]
This report presents the results of an experimental study of the angular distributions and spectra...
Dr
Gennady Naumenko
(Tomsk Polytechnic University), Mr
Vitold Bleko
(National Research Tomsk Polytechnic University)
27/09/2016, 18:40
Poster
The dielectric fibers are widely used in technique for light transport and as the beam loss position monitor in particle accelerators. This work reports the results of the experimental investigations of polarisation radiation properties in the dielectric fibers for different fiber positions relative to an electron beam. The experimental results show that we can use fibers for non-invasive beam...
Mr
Andrey Oleinik
(Belgorod National Research University)
27/09/2016, 18:40
Poster
Pyroelectric crystal with a tungsten tip is a well-known setup used to accelerate ions for the D-D neutron generation [1,2]. The use of the tungsten tip enables to ionize residual gas in a local volume, generating ions for further acceleration. Such peculiarity allows developing a compact neutron source. The neutron flux produced by such generator is low but can be applied for different...
Dr
Alexander Shchagin
(Kharkov Institute of Physics and Tecknology)
27/09/2016, 18:40
Poster
In the charge-exchange accelerators, negatively charged accelerated ions loss their electrons in a thin charge-exchange target and become positively charged ions. In the present paper, radiation arising at charge-exchange of non-relativistic ions a thin transparent charge-
exchange target is considered. The formula for spectral and angular distribution of the number of...
Mr
Hayk Gevorgyan
(Student)
27/09/2016, 18:40
Poster
The radiation in stack of the two plates of the electron bunch, microbunched in SASE FEL process, was investigated. Frequency-angular distribution of the radiation consists of two factors: the bunch form-factor around the resonant frequency and the radiation distribution formed by the passage of a single electron through a stack of plates. The region of radiated frequencies l both above and...
Prof.
Alexander Potylitsyn
(Tomsk Polytechnic University)
27/09/2016, 18:40
Poster
In the report we analyze a possibility to use for a diagnostics aims the process of coherent transition radiation (CTR) produced by a train of tilted ultrashort electron bunches. Measuring spectral-angular distributions of CTR produced by such a train it is possible to determine microbunch length, bunch tilting angle, separation between bunches and modulation depth.
Prof.
Anton Noskov
(Belgorod State University)
27/09/2016, 18:40
Poster
The dynamic theory of coherent X-ray radiation generated by a beam of relativistic electrons in three-layer structure consisted of amorphous layer, vacuum (air) layer and a single crystal has been developed. The expressions for spectral-angular density of diffracted transition radiation (DTR), parametric X-ray radiation (PXR) and their interference term have been derived within the framework...
Dr
Alexey Dik
(LPI RAS, NRNU MEPhI)
27/09/2016, 18:40
Poster
The process of charged particles channeling through potential channels formed by crossed laser beams is described using classical approach and covering the effect of charged particles radiative deceleration in such channels. The way to increase charged particle beam cooling efficiency is present.
Dr
Sergey Galyamin
(Saint Petersburg State University)
27/09/2016, 18:40
Poster
Recently we have reported on specific form of dielectric target that effectively concentrates Cherenkov radiation from a point charge into a small vicinity of the focus point [1]. It was shown that for decimeter-sized target made from typical dielectric (e.g., Teflon) and terahertz radiation frequencies, the field in focus can be around two orders of magnitude larger compared to the field at...
Mr
Artur Movsisyan
(Institute of Applied Problems of Physics NAS RA, Yerevan, Armenia)
27/09/2016, 18:40
Poster
The diffraction of thermal neutrons on x-cut quartz crystal for the symmetric Laue geometry under the action of a temperature gradient perpendicular to the reflecting atomic planes (101 ฬ
1) was theoretically considered. The controllability of a neutron beam in space and time is analyzed and its parameters are estimated (relative maximum intensity, the angular and energy distribution of...
Ms
Darya Danilova
(National Research Nuclear Univesity MEPhI)
27/09/2016, 18:40
Poster
Nowadays there is a tendency to use short bunches rather than long ones. The shorter electron bunch is, the shorter the pulse of generated radiation can be. Extremely short pulses of electromagnetic radiation are to be widely used in nanotechnology, medicine, biology. In this report we investigate effects of correlations between electrons in transition radiation as far as these effects remain...
Mr
Vaghan Ivanyan
(YerPhI)
27/09/2016, 18:40
Poster
By means of program GEANT4 the research of possibility obtaining low energy neutron beams was performed. To get the neutron flux 18 MeV external proton beam from cyclotron C18/18 is planned. As a source of neutron flux is planned proton induced reactions on 9Be target. The neutron yield dependence on the thickness of beryllium target was investigated. The problems of reducing the ratio of...
Mr
Ramazan Nazhmudinov
(Belgorod National Research University)
27/09/2016, 18:40
Poster
Parametric X-ray radiation (PXR) appears during coherent scattering of the charged particle Coulomb field on the atomic structures. PXR was studied theoretically and experimentally in different geometries, in a wide range of charged particles energies and different targets (crystalline, polycrystalline and multilayer mirrors). Nevertheless, the PXR form powders is one of sufficient lacuna for...
Dr
Gennadiy Filippov
(Cheboksary Polytechnic Institute), Ms
Irina Lysova
(Chuvash State Pedagogical University)
27/09/2016, 18:40
Poster
At the present work we consider the problem of electromagnetic radiation generated in the uniform motion of a point charge along the dielectric tube, on a small distance from the axis.
At the presence of a moving charge inside the tube will be excited as the own frequencies, and all the others.
The problem is solved using Maxwell's equations for the vortex and potential fields. By...
Prof.
Vladimir Vysotskii
(Kiev National Shevchenko Univ, Kiev, Ukraine)
27/09/2016, 18:40
Poster
In the work the prperties of long-distant undamped thะตhermal waves generated in pulse radiative processes are studied.
Dr
Alexander Shchagin
(Kharkov Institute of Physics and Tecknology)
27/09/2016, 18:40
Poster
Properties of Vavilov-Cherenkov radiation were obtained by Frank and Tamm in classic approach. Shortly after, Ginzburg described these properties in quantum approach. Later, expressions for frequencies of coherent bremsstrahlung and parametric X-ray radiation in
periodic medium were obtained by Ter-Mikaelian in classic approach neglecting transverse...
Dr
Sergey Galyamin
(Saint Petersburg State University)
27/09/2016, 18:40
Poster
We consider radiation produced by a point charge flying through the plane interface between vacuum and half-infinite isotropic chiral medium. For description of chiral medium, we use symmetrized material relations and Condon dispersion model [1]. We deal with charge motion from vacuum into medium and backwards. In the case where charge enters medium, we perform generalization of paper [2],...
Dr
Artur Aramyan
(IAPP NAS RA)
27/09/2016, 18:40
Poster
The presented results of model numerical calculations indicate that at the ionization with a strong shock wave travelling at supersonic speed, the air must ยซglowยป with low frequency electromagnetic radiation (1-2 MHz), just as the solar wind generates the aurora borealis as a result of interaction with the magnetic field of the Earth.
The results of ground-based observations of the process...
Mr
Aleksandr Baryshnikov
(NRNU MEPhI)
27/09/2016, 18:40
Poster
This study provides insight into the performance of the capillary system, as well as getting a qualitative picture of X beam redistributions while passing through these structures that becomes important for definition of optimal parameters of capillary structures specially designed.
Mr
Sergei Anishchenko
(Research Institute for Nuclear Problems)
27/09/2016, 18:40
Poster
Shot noise, intrinsic to electron beams, is the cause of statistical fluctuations in
radiation generated by quasi-Cherenkov generators operating in stationary and non-stationary regimes. Radiated power and instability time growth are
the main output parameters
characterizing the dynamics of electron beam interacting
via the radiation field.
Shot-noise related fluctuations of radiated...
Dr
Sergii Trofymenko
(Kharkov Institute of Physics and Technology)
27/09/2016, 18:40
Poster
The problem of ionization energy loss of high-energy electron-positron pair in thin layer of substance is considered. It is assumed that the thin layer is situated in vacuum in the direction of the pair motion on some distance from the substance in which the pair is created. It is shown that in this case the approximation of parallel electron and positron velocities, which is usually used for...
Dr
Anahit Shamamyan
(A. I. Alikhanyan National Laboratory (Yerevan Physics Institute)), Prof.
Lekdar Gevorgian
(A. Alikhanyan National Laboratory (Yerevan Physics Intitute))
27/09/2016, 18:40
Poster
The undulator radiation theory of channeling positrons in the crystalline undulator (CU), which consists of a bent single crystals, separated by intervals, was developed. The calculation formula for the frequency distribution of the radiation formed in CU with intervals was received in [1]. It is shown that undulator radiation may be intensified by the presence of intervals. In this paper, an...
Mr
Alexsandr Ponomarenko
(Russia)
27/09/2016, 18:40
Poster
Generation of electromagnetic radiation in the frequency region of terahertz (THz) has attracted ever-growing attention owing to fundamental significance and interesting applications. In our previous work [1] we investigated source of THz radiation based on electrons moving through the channel with variable radius, where radiation arises due to Cherenkov (CR) and Smith-Purcell radiations...
Mr
Sergei Abdrashitov
(National Research Tomsk Polytechnic University)
27/09/2016, 18:40
Poster
As is known, the channeling radiation (CR) of high-energy electrons in a crystalline target (radiator) and subsequent electron-positron pair production in downstream amorphous target (convertor), so called a โhybridโ solution [1, 2], is the effective positron source.
The Mathematicaโข code BCM-1 [3] developed by the authors enables calculating the trajectories and radiation spectra of...
Mr
Vyacheslav Malyshevsky
(Southern Federal University, 344090, Rostov-on-Don, Russia)
27/09/2016, 18:40
Poster
The problem of the transition radiation of multicharged ions at the interface between two media and in a thin plate under the charge-exchange conditions has been solved. It has been shown that the processes of pickup (or loss) of electrons by accelerated multicharged ions at the interface between two media significantly increases the yield of transition radiation. To observe the effects...
Mr
Evgeny Gurnevich
(Research Institute for Nuclear Problems of Belarusian State University)
27/09/2016, 18:40
Poster
Volume FEL (VFEL) lasing in centimeter and millimeter wavelength ranges [1-5] is an encouraging demonstration of the potential for the development of similar sources in other ranges of electromagnetic spectrum. This paper considers THz generation by a relativistic electron beam in a VFEL whose slow-wave structure (resonator) consists of a rectangular waveguide with an array of periodically...
