Coordinatori
PS3 - Poster session
- Luca Marchitto (Istituto Motori- Im)
Dr.
Vladimir Maisheev
(IHEP, Protvino, Russia)
27/09/18, 18:40
Poster
Recently started studies on the application of volume reflection of particles in crystals for the steering beams (for extraction and collimation of a circulating beam in accelerators). Volume reflection is more efficient than channeling, but requires amplification of the deflection angle by applying multicrystals. The report discusses two new applications of multicrystals made like ...
Valerio Mascagna
(MIB)
27/09/18, 18:40
Poster
The last decade has seen a growing interest in the study of the passage of high energy charged particles in oriented or bent crystals. An increasing number of experiments on high energy beam lines are performed to investigate all the involved physical processes.
An experimental apparatus which includes different type of detectors run by a modular architecture data acquisition software is...
Dr.
Pavel Karataev
(Royal Holloway, Unviersity of London)
27/09/18, 18:40
Poster
Development of non-invasive instrumentation for modern and future accelerator facilities including linear and circular colliders and X-ray free electron lasers has become a separate area of research in accelerator physics during the past two decades. The reason is that the usage of any invasive devices is excluded in high-energy particle accelerators because of safety reasons.
Since the...
Sig.
Ramazan Nazhmudinov
(Belgorod National Research University)
27/09/18, 18:40
Poster
Diagnostics of transverse phase space of charged particle beams is an important task for modern scientific research. Solid wire-scanners are still very popular due to their simplicity, robustness and sufficient resolution. In high energy linear accelerators bremsstrahlung photons are highly collimated, therefore a detector have to be placed very far downstream that implies difficulties with...
Sig.
Sergii Trofymenko
(Akhiezer Institute for Theoretical Physics of NSC KIPT)
27/09/18, 18:40
Poster
Positrons are usually produced in tungsten (further W) single-crystalline and amorphous targets (see, e.g. [1]). However, in tungsten single-crystals dechanneling length of incident electrons is rather short, which restricts their applicability. The possibility of application of textured polycrystalline targets (in which the channeling of electrons was recently observed [2]) for increasing of...
Egor Kurnikov
(NRNU MEPhI)
27/09/18, 18:40
Poster
Charged particle beams are now widely used in various fields of science, from basic and applied research to technology, in biomedicine and other fields. In this regard, an important task is to transport the beam to the object of investigation or processing. At present, the main technique to form the beams of charged particles is to use magneto-optical systems that are quite complex and require...
Sig.
Andrey Oleinik
(BelSU)
27/09/18, 18:40
Poster
Pyroelectric materials (for example, single crystals of lithium niobate and lithium tantalate or PZT ceramics) are used to generate high potential in vacuum, to accelerate electrons and positive ions, to produce X-rays and neutrons [1-4]. Portable X-ray and neutron sources are being developed, based on this phenomenon [5,6]. However, low intensity makes it difficult to use such sources for...
Sig.
Hayk Gevorgyan
(Student)
27/09/18, 18:40
Poster
The problem of increasing the efficiency of free electron laser (FEL) during the passage of a relativistic electron bunch through an undulator with intervals is considered. A formula is obtained for the spectral distribution of spontaneous radiation. The dependence of FEL gain on the number of undulator sections is investigated. It is shown that a increase in the efficiency of FEL, when...
Dr.
Timur Tukhfatullin
(National Research Tomsk Polytechnic University)
27/09/18, 18:40
Poster
Half-wavelength crystal (HWC) is a thin crystal, when a channelled particle experiences only one collision with crystallographic plane during penetration through a HWC. Recent experiment [1] demonstrated 2 MeV protons mirroring by thin silicon HWC. More recently, the mirroring effect was observed for 400 GeV protons at CERN-SPS [2]. The existence of mirroring effect using HWC in the case of...
Sig.
Alexey Pronikov
(National Research Nuclear University MEPhI)
27/09/18, 18:40
Poster
It is very important task to define the tolerances necessary for correct operation of electron linac. The detuning of linac main parameters as frequency, RF-field amplitude and phase can sufficiently influence to the beam parameters. It is highly sufficient for linacs with high brightness beams which are necessary for light sources and colliders. It is also sufficient for industrial linacs....
Sig.
Iliya Ashanin
(NRNU MEPHI), Dr.
Sergey Polozov
(NRNU MEPhI)
27/09/18, 18:40
Poster
In this report we present first results of the design of the compact XFEL based on prototype of new linac-injector. This linac develops for the one of the largest Russian scientific projects, 6 GeV 4-th generation light source SSRS4. Both synchrotron and XFEL based on top-up injection linac are proposed to construct in SSRS4 complex. Suggested prototype of the injector initially will include...
Dr.
Gennady Naumenko
(Tomsk Polytechnic University)
27/09/18, 18:40
Poster
In Ref. [1,2] authors observed the monochromatic lines in the spectrum of the coherent transition and diffraction radiation generated by modulated electron beam with the frequency of the accelerating RF field and corresponding to the resonances for .
In this report we present the results of coherent grating transition radiation (CGTR) and spectra measurements within the frequency range...
Prof.
Igor Vnukov
(Belgorod sate university, Belgorod, Russia)
27/09/18, 18:40
Poster
Projected International Linear Collider [1] and Compact Linear Collider [2] need new measurement methods of parameters of relativistic electron beam with size of some nm and divergence about 10-40 $\mu$rad. Using of fast electrons diffracted transition radiation (DTR) in thin crystals for beam divergence measurements [3] is really impossible because of the crystals destroying [4]. Using of...
Sig.ra
Yulia Kluchevskaia
(NRNU MEPHI)
27/09/18, 18:40
Poster
The beam dynamics analysis of the RF-photogun as the LUCX facility at KEK, Japan, and new photo injector for the Russian 4th generation light source SSRS4 was done to chose the optimal length of the section and cell’s number and also to define optimal accelerating gradient and injection phase. The simulation of electrodynamics characteristics and fields distribution in the RF-gun based on...
Dr.
Kristina Vokhmyanina
(International Scientific and Educational Laboratory of Radiation Physics, Belgorod National Research University), Dr.
Ramazan Nazhmudinov
(Belgorod National Research University)
27/09/18, 18:40
Poster
Possibility of charged particles beam manipulation by means of dielectric surfaces has been demonstrated earlier. This effect is caused by formation of a self-consistent charge distribution on the dielectric channel walls. The distribution provides the passage of a part of the charged particle beam without direct contact with the surface of the channel. Efficiency of controlling a beam passing...
Sig.
Oleg Ivashchuk
(Belgorod National State University)
27/09/18, 18:40
Poster
Pyroelectric deflector of 7 MeV electron beam
O. Ivashchuka, I. Kishina,b, A. Kubankina,b, A. Oleinika,c, A. Shchagina,d, V.I. Alekseev a,b, A.N. Eliseyeva,b
a Laboratory of Radiation Physics, Belgorod National Research University, Belgorod, Russia
b Lebedev Physical Institute, Moscow, Russia
c John Adams Institute at Royal Holloway, University of London, Egham, UK.
d Kharkov...
Dr.
Timur Tukhfatullin
(National Research Tomsk Polytechnic University)
27/09/18, 18:40
Poster
Experiments with high-energy particle beams using straight and bent crystals is a popular recent trend in high-energy accelerator physics. The strong electrical field of the crystal planes allows steering of particle trajectories. Recently, experiments on the bent crystal channelling of 6.5-TeV protons were performed at the Large Hadron Collider in CERN toward the future beam collimation...
39.
Status of Diagnostic and Control System Development for Russian New Light Source Project SSRS-4*
Dr.
Timur Kulevoy
(ITEP)
27/09/18, 18:40
Poster
The project of the new light source of 4th geberation is under development in Russia under Kurchatov institute leadership. In framework of this project the test bench for timing system as well for diagnostic system is under development. The approach to the control and diagnostic systems for this light sosurce are discussed. Also the first results obtained at the test-bench are presented and discussed.
Sig.na
Yangmei Li
(University of Manchester, Cockcroft Institute)
27/09/18, 18:40
Poster
Hollow plasma has been demonstrated in favor of beam quality preservation in the proton-driven plasma wakefield accelerators, where the transverse wakefields acting on the accelerated beam vary in radius and time in uniform plasma even in the nonlinear regime. With hollow plasma, there is completely no transverse plasma wakefields. However, this scheme requires prefect beam-channel alignment....
Dr.
Alessandro Curcio
(CERN)
27/09/18, 18:40
Poster
We report on preliminary experimental studies on mm-waves at CLEAR electron LINAC (CERN). The production of coherent radiation in the (sub-)THz region by using ps-long electron bunches is the first step towards the realization of an intense source for both users and applications in accelerator physics. Some of different mechanisms like coherent transition, diffraction, Cherenkov and Smith...
Sig.
Yury Eikhorn
(National Research Tomsk Polytechnic University)
27/09/18, 18:40
Poster
The aim of our investigations is to create the physical model for effective reflection of charged particle beam by the crystal surface to take into account relativistic effects. Particularly, calculation of the optimal structure and reflecting surface geometry, at which the reflection coefficient of incident beam will be maximum.
Dr.
Mykhaylo Vysotskyy
(Kiev National Shevchenko Univ)
27/09/18, 18:40
Poster
In atomic and nuclear physics the state of moving particles is usually described by idealized plane waves. Such model is approximate and characterizes the features of such particles with some inaccuracies.
A real alternative is to describe the particle as a moving localized wave packet. The main disadvantage of this description is the instability and continuous "spreading" and delocalization...
Dr.
Mykhaylo Vysotskyy
(Kiev National Shevchenko Univ)
27/09/18, 18:40
Poster
In the report, the problem of realization and optimization of nuclear fusion reactions in electric discharge channel (for example, in a natural lightning channel) is considered. The main mechanism for optimization of such processes is connected with the self-similar formation of coherent correlated states under action of a pulsed magnetic field accompanying such a discharge.
It is shown for...
