Mr
Vyacheslav Malyshevsky
(Southern Federal University, 344090, Rostov-on-Don, Russia)
27/09/2012, 19:20
Poster Session
Dynamic effects that have been recently discovered in the rainbow scattering of neutral atoms from crystal surfaces at grazing incidence are interpreted. It is shown that these features can be explained by the electron drag of scattered atomic particles near the crystal surface.
Prof.
Danilo Giulietti
(PI)
27/09/2012, 19:21
Channeling Primer
LILIA is an experiment of light ions acceleration trough laser interaction with thin metal targets to be done at the SPARC-LAB facility under operation in Frascati. The main goal is to obtain a beam suitable for injection in other accelerating structure. The laser beam and focusing optics parameters available for the first phase of experiments are: beam diameter โ120mm, ~flat top, M2โ1.5 ;...
Mr
Vladimir Shpakov
(RAS P.N.Lebedev Physical Institute)
27/09/2012, 19:22
Poster Session
New research in acceleration physics leads to growing up the brilliance of charged particles bunches. Existed methods based on interaction of detection devices with bunches do not satisfy our need, because of the fact that new high intensity bunches could damage this devices. Moreover, these methods do not allow analyzing the bunches in real time. Recently new technique based on ODRI (optical...
Dr
Yuichi Takabayashi
(SAGA Light Source)
27/09/2012, 19:23
Poster Session
We propose two new methods (local and remote methods) of measuring electron beam profiles using parametric X-ray radiation (PXR). For the local method, we have demonstrated a proof-of-principle experiment, in good agreement with the results obtained with an ordinary method using a fluorescent screen. For the remote method, we have proposed to use Fresnel zone plates (FZPs) as X-ray lenses. As...
Prof.
Yury Pivovarov
(National Research Tomsk Polytechnic University)
27/09/2012, 19:24
Poster Session
The X-radiation from relativistic channelled electrons at the Bragg angles โ Parametric X-Radiation at Channeling (PXRC) โ is studied both experimentally and theoretically.
The experiment was carried out using a 255 MeV electron beam from a linac at newly constructed beam line for the study of interactions between a relativistic electron beam and crystals at the SAGA Light Source. The...
Prof.
Toshiro Sakae
(Department of Histology, Nihon Univeristy School of Dentistry at Matsudo)
27/09/2012, 19:25
Poster Session
Using the energy-valuable monochromatic X-ray beam sourced by Parametric X-ray radiation at the Laboratory for Electron Beam Research and Application (LEBRA) of Nihon University, distribution map of Sr in the fossil dinosaur eggshell could be revealed by tracing the X-ray absorption edge. The more advanced and smart element detecting system was built at LEBRA. The new system enabled to detect...
Prof.
Alexey Aleksandrovich Tishchenko
(National Research Nuclear University (MEPhI))
27/09/2012, 19:26
Poster Session
We present a theory of diffraction radiation based on the Smith - Purcell mechanism of the radiation generation from a circularly symmetric photonic wire with one - dimensional periodic dielectric function.
Dr
Vahram Parazian
(Institute of Applied Problems in Physics)
27/09/2012, 19:27
Poster Session
We consider the forward transition radiation generated by a monoenergetic electron bunch in a dielectric plate in presence of ultrasonic waves. The expression for the spectral-angular distribution of the radiation intensity is given for the general case of electrons distribution in the bunch. Various special cases are discussed and the coherence effects are investigated. Conditions are...
Dr
Luca Marchitto
(Istituto Motori- IM)
27/09/2012, 19:28
Poster Session
In this work the results of numerical computation applied to X-ray absorption by fuel sprays are reported. A radiation source of Cu K๏ก X-ray tube in combination with a polycapillary halflens has been simulated with the emerging radiation impacted on a CCD detector. A 3D software reproduces both parallel and low divergent X-ray beams irradiating the samples of various shapes and different...
Dr
Yuji Oishi
(INFN(PI), CRIEPI)
27/09/2012, 19:29
Poster Session
X-ray generation by tribocharging is currently an attractive issue. C.G.Camara et al showed that x-rays can be generated by only peeling adhesive tape in vacuum without external electrical high-voltage power supply and demonstrated radiography of human fingers using this unique x-ray source. The X-ray emission, in this scheme, is interpreted as Bremsstrahlung radiation from electrons which are...
Mr
Azamat Ligidov
(National Research Nuclear University "MEPHI")
27/09/2012, 19:30
Poster Session
This report describes research work on studying and testing the enhanced harmonic generation at FEL machines by external amplified signal of high harmonics generated in a gas to be applied to the SPARC accelerated electron beam. The aim is to investigate how the presence of the reinforcing laser radiation affects the motion of electrons and its characteristics. The task of this work is to...
Dr
Ashot Gevorkyan
(Institute of Informatics and Automation Problems, NAS RA)
27/09/2012, 19:31
Poster Session
The formation and governing of periodically modulated refractive index in medium is a most important problem of solid state physics and material science. First of all it is related to the possibility of developing compact UV or X-ray Free-Electron Lasers (FEL) based on emission of transition radiation (TR).
Currently the following two problems are discussed intensely:
a. A gas-plasma...
Prof.
Alpik Mkrtchyan
(Institute of Applied Problems of Physics NAS RA)
27/09/2012, 19:32
Poster Session
By the method of solving the noncorrect inverse problem is explored the influence of controlling parameters on the formation of acoustoplasma emission radiation lines and is determined the operating parameters of acoustic vibrations. With the help of experimental measurements of current and voltage values the parameters of acoustoplasma in a discharge tube are determined.
Mr
Artur Movsisyan
(Institute of Applied Problems of Physics NAS RA, Yerevan, Armenia)
27/09/2012, 19:33
Poster Session
The aim of this work is to show the advantages of monochromatic X-ray beam obtained by the acoustic monochromator (AM) with respect to X-ray beam obtained by the Bragg monochromator. On the basis of the AM, X-ray detector and a goniometer with two heads, developed at the Institute of IAPP NAS RA, and using only usual (old) diffractometers X-ray tube, an automated diffractometer for structural...
Mr
Alexsandr Ponomarenko
(National Research Nuclear University ยซMEPHIยป)
27/09/2012, 19:35
Poster Session
Cherenkov radiation arising when electrons pass through the hole (channel) in a target is known to be a very good source of THz radiation. In this work we explore theoretically the situation when internal radius of the channel is periodically changed. In this case Smith-Purcell radiation is added to the Cherenkov one. The expressions obtained coincide with the known ones in case of usual...
Dr
Alexey Tishchenko
(National Research Nuclear University "MEPhI")
27/09/2012, 19:36
Poster Session
Polarization radiation from a relativistic charged particles bunch is considered at its oblique incidence onto amorphous target. The spectral-angular characteristics of both Cherenkov and transition radiation are explored at the X-ray frequencies. It is shown that for forward radiation the peaks both transition and Cherenkov (near the absorption lines) exist, whereas for backward direction...
Prof.
Alpik Mkrtchyan
(Institute of Applied Problems of Physics NAS RA)
27/09/2012, 19:37
Poster Session
Changing of the emission spectrum of the first positive system of nitrogen is obtained in nitric low-pressure acoustoplasma (<1 torr) at a discharge current modulation. The intensity of all lines of the first positive system of nitrogen decreases, while the intensity of the line of doubly ionized nitrogen atom N II at 0,6482 micron is increasing significantly. Because the ionization potential...
Dr
Sergey Uglov
(Tomsk Polytechnic University)
27/09/2012, 19:38
Poster Session
Experimental setup on the base of 5.7 MeV microtron for investigation of the radiation in the ultrasoft X-ray and vacuum ultraviolet region generated at incidence of relativistic electrons on the surface of a multilayer X-ray mirror is described. The results of the first test experiments carried out for observing the contribution of parametric radiation in generated X-rays are also presented.
Dr
Sergey Uglov
(Tomsk Polytechnic University)
27/09/2012, 19:39
Poster Session
In this work the energy dependences of the spots and bands in angular patterns of X-rays generated by 20-35 MeV rechanneling electrons in a 2 mm thick Si crystal are presented. It is shown that such a complicated โbackgroundโ additional to ordinary bremsstrahlung must be taken into account at studying of X-ray generation in periodic structures created on crystalline substrates because in the...
Prof.
Aleksandr Potylitsyn
(Tomsk Polytechnic University)
27/09/2012, 19:40
Poster Session
The interference pattern obtained by two diffraction radiation (DR) beams from two shifted targets may be used to determine the length of ultra-short electron bunches.Recently there was established the flexible coherent diffraction radiation interferometry scheme at the SINAP accelerator facility. Here we report the results of the first measurement of the electron bunch length down to...
Prof.
Sergei Kukhlevsky
(University of Pecs)
27/09/2012, 19:41
Channeling Primer
An experimental set-up has been developed at University of Pecs to generate plasma based waveguides for acceleration of electrons by the Hungarian Extreme Laser Infrastructure (ELI). The present study is focused on the theoretical analysis and experimental adjustment of the most critical parameters of the hydrogen-plasma generator that uses the so-called C-C excitation scheme for creation of a...
Dr
Alexander Shchagin
(Kharkov Institute of Physics and Tecknology)
27/09/2012, 19:42
Poster Session
Emission of parametric X-ray radiation by relativistic charged particle is considered as a result of conversion of virtual quanta accompanying the relativistic charged particle moving in a crystal to real ones. A simple expression for conversion coefficient is obtained. Conditions when the coefficient value can exceed the unity are found.
Dr
Gennady Kovalev
(UofM)
27/09/2012, 19:43
Poster Session
The total cross section for the wave scattering by prolate spheroid is compared with the traditional approach of solving the similar problem of scattering by atomic chain.
We show that a set of piecewise continuous spheroidal coordinates and corresponding spheroidal functions can be a powerful tool for wide class of scatterers, in particular: cylinders with polygon profiles and 3D...
Dr
M.A. Aginian
(Yerevan Physics Institute)
27/09/2012, 19:44
Poster Session
Analytical and numerical results on the coherent parametric X-ray radiation (CXPXR) produced by microbunched beams passing through the crystalline planes of single crystals under certain conditions are obtained. Despite the expectations the preliminary results for ultrarelativistic particles obtained in first approximation under certain assumptions show that the intensity of CXPXR is lower...
Dr
L. Bobb
(John Adams Institute at Royal Holloway, Egham, Surrey, United Kingdom)
27/09/2012, 19:45
Poster Session
Diffraction radiation (DR) is produced when a relativistic charged particle moves in the vicinity of a medium. The electric field of the charged particle polarizes the target atoms which then oscillate, emitting radiation with a very broad spectrum. The spatial-spectral properties of DR are sensitive to a range of electron beam parameters. Furthermore, the energy loss due to DR is so small...
Dr
Sergio Bartalucci
(INFN Laboratori Nazionali di Frascati)
27/09/2012, 19:46
Poster Session
In ordered crystal lattice very strong influence of crystal axes and planes electrical field on motion and interaction of fast charged particles with crystal atoms and nuclei exists. In works [1,2] it was shown that in monocrystal targets like possibility of fusion process with the participation of both target nuclei (e.g. ) and beam of fast nuclei (e.g. ), directed at Lindhard angle,...
Dr
Alexey Dik
(PN Lebedev Phys Institute, Moscow)
27/09/2012, 19:47
Poster Session
Researches of the last years showed that interaction of intense ultrashort laser impulses with plasma can be a source of compact bunches of electrons as well as of powerful high- energy electromagnetic radiation. Due to the high gradient of the field of a laser, impulse electrons can be accelerated till the speeds close to the light velocity. Plasma waves being formed behind a laser impulse...
