Keyword: electron
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MOX02 Development and Implementation of Bunch Shape Instrumentation for Ion Linacs linac, target, detector, instrumentation 1
 
  • A. Feschenko, V. Gaidash, S.A. Gavrilov
    RAS/INR, Moscow, Russia
  
  A longitudinal charge distribution in beam bunches, so-called bunch shape, is one of the most important and difficult to measure characteristics of a beam in ion linear accelerators. Despite the variety of approaches only the methods using low energy secondary electrons emitted, when the beam passes through a thin target, found practical application. The most common beam instrumentation, based on this method, became Bunch Shape Monitor developed in INR RAS. The monitor provides direct measurements of bunch shape and bunch longitudinal halo, allows to carry out such complex diagnostic procedures as longitudinal emittance measurements, amplitude and phase setting of accelerating cavities and control of bunch shape evolution in time to check the overall quality of longitudinal tuning of the accelerator. The principle of the monitor operation, design features, ultimate parameters and limitations are discussed. Several modifications of the monitor with implementation peculiarities are described as well as lots of measurement results at different ion linacs with a variety of beam parameters. New challenges for bunch shape instrumentation to satisfy demands of forthcoming linacs are also characterized.  
slides icon Slides MOX02 [9.840 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOX02  
About • Received ※ 30 September 2021 — Revised ※ 04 October 2021 — Accepted ※ 07 October 2021 — Issued ※ 20 October 2021
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MOPSA02 Experimental Tests of CW Resonance Accelerator With 7.5 MeV High Intensity Electron Beam cavity, experiment, injection, resonance 132
 
  • L.E. Polyakov, Ya.V. Bodryashkin, M.A. Guzov, I.I. Konishev, N.N. Kurapov, V.V. Kuznetsov, I.A. Mashin, V.R. Nikolaev, A.M. Opekunov, G. Pospelov, A.N. Shein, I.V. Shorikov, N.V. Zavyalov, I.V. Zhukov
    RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia
  • S.A. Putevskoy, M.L. Smetanin, A.V. Telnov
    VNIIEF, Sarov, Russia
  
  CW resonance accelerator with high average power electron beam is developed at RFNC-VNIIEF. Electron energy range is varied from 1.5 to 7.5 MeV and average beam current is up to 40 mA. Electrons obtain the required energy by several passing of coaxial half-wave accelerating cavity. In this paper we present the results of electron beam dynamics simulation during its acceleration and transportation. The operating parameters of RF system, beam optics and bending magnets are determined. These parameters permit to obtain output beam with minimal current losses on each accelerating stage. As a result of carried out tests we obtained 7.5 MeV electron beam after five passes of accelerating cavity. The electron energy spectrum, average beam current, transverse beam dimensions were determined on each accelerating stage. Common beam current loss is under 10 %.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA02  
About • Received ※ 25 September 2021 — Revised ※ 26 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 21 October 2021
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MOPSA11 Room Temperature Folding Segment for a Transfer of Multiple Charge States Uranium Ions Between Sections of Linac-100 linac, simulation, heavy-ion, emittance 153
 
  • V.S. Dyubkov
    MEPhI, Moscow, Russia
  
  Beam dynamics simulations results of multiple charge states uranium ions (238U59+,60+,61+) in a transfer line between two LINAC-100 superconducting sections of DERICA project (JINR, Dubna, Russia) are presented. Transfer line is an advanced magnetic optical system and provides beams bending on 180 degrees. Transfer line options are proposed. Parameters of its optic element are chosen so that dispersion function has zero value at the start and end of the channel for transporting the 50 MeV/nucleon ion beams.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA11  
About • Received ※ 28 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 17 October 2021  
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MOPSA29 Applied Research Stations and New Beam Transfer Lines at the NICA Accelerator Complex detector, diagnostics, radiation, beam-diagnostic 172
 
  • A. Slivin, A. Agapov, A.A. Baldin, A.V. Butenko, G.A. Filatov, A.R. Galimov, S.Yu. Kolesnikov, K.N. Shipulin, E. Syresin, G.N. Timoshenko, A. Tuzikov, V.I. Tyulkin, A.S. Vorozhtsov
    JINR, Dubna, Moscow Region, Russia
  • S. Antoine, W. Beeckman, X.G. Duveau, J. Guerra-Phillips, P.J. Jehanno, A. Lancelot
    SIGMAPHI S.A., Vannes, France
  • D.V. Bobrovskiy, A.I. Chumakov, S. Soloviev
    MEPhI, Moscow, Russia
  • P.N. Chernykh, S. Osipov, E. Serenkov
    Ostec Enterprise Ltd, Moscow, Russia
  • I.L. Glebov, V.A. Luzanov
    GIRO-PROM, Dubna, Moscow Region, Russia
  • A.S. Kubankin
    BelSU, Belgorod, Russia
  • T. Kulevoy, Y.E. Titarenko
    ITEP, Moscow, Russia
  • A.M. Tikhomirov
    JINR/VBLHEP, Dubna, Moscow region, Russia
  
  Applied research at the NICA accelerator complex include the following areas that are under construction: single event effects testing on capsulated microchips (energy range of 150-500 MeV/n) at the Irradiation Setup for Components of Radioelectronic Apparature (ISCRA) and on decapsulated microchips (ion energy up to 3,2 MeV/n) at the Station of CHip Irradiation (SOCHI), space radiobiological research and modelling of influence of heavy charged particles on cognitive functions of the brain of small laboratory animals and primates (ener-gy range 500-1000 MeV/n) at the Setup for Investigation of Medical Biological Objects (SIMBO). Description of main systems and beam parameters at the ISCRA, SOCHI and SIMBO applied research stations is presented. The new beam transfer lines from the Nuclotron to ISCRA and SIMBO stations, and from HILAC to SOCHI station are being constructed. Description of the transfer lines layout, the magnets and diagnostic detectors, results of the beam dynamics simulations are described given.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA29  
About • Received ※ 01 October 2021 — Revised ※ 02 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021
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MOPSA42 Compact S-Band Accelerating Structure for Medical Applications coupling, linac, impedance, bunching 186
 
  • M.V. Lalayan, A. Batov, M. Gusarova, S.M. Polozov, R.A. Zbruev
    MEPhI, Moscow, Russia
  
  This paper describes electromagnetic design results for the compact 6.3 MeV electron linac for the radiation therapy facility. Linac is based on S-band biperiodic accelerating structure with inner coupling cells with an increased coupling coefficient.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA42  
About • Received ※ 01 October 2021 — Revised ※ 02 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 11 October 2021
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MOPSA57 Experimental Investigation the Synthetic Crystal Diamond Plates of Methods of Positron Annihilation Spectroscopy positron, experiment, radiation, laser 231
 
  • M.K. Eseev
    NArFU, Arhangelsk, Russia
  • A.G. Kobets, I.N. Meshkov, O. Orlov, A.A. Sidorin
    JINR, Dubna, Moscow Region, Russia
  • A.G. Kobets
    IERT, Kharkov, Ukraine
  • K. Siemek
    JINR/DLNP, Dubna, Moscow region, Russia
  • K. Siemek
    IFJ-PAN, Kraków, Poland
  
  The results of experimental studies of synthetic diamond plates as a promising element of X-ray optics of synchrotrons by positron annihilation spectroscopy using the LNP im. V.P. Dzhelepov, JINR.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA57  
About • Received ※ 25 September 2021 — Revised ※ 02 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 17 October 2021
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MOPSA58 Sources of Ultrashort X-Ray Pulses in the Investigation of the Structure and Dynamics of Nanosystems FEL, laser, scattering, radiation 234
 
  • M.K. Eseev
    NArFU, Arhangelsk, Russia
  
  Free electron lasers are today one of the main sources of ultrashort X-ray pulses. The installations used in the world today and the results of experiments and calculations with various nanosystems are presented.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA58  
About • Received ※ 01 October 2021 — Revised ※ 02 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 24 October 2021
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TUA01 VEPP-4M Electron Positron Collider Operation at High Energy experiment, polarization, luminosity, laser 34
 
  • P.A. Piminov, G.N. Baranov, A.V. Bogomyagkov, V.M. Borin, V.L. Dorokhov, S.E. Karnaev, K.Yu. Karyukina, V.A. Kiselev, E.B. Levichev, O.I. Meshkov, S.I. Mishnev, I.A. Morozov, I.B. Nikolaev, I.N. Okunev, A.G. Shamov, E.A. Simonov, S.V. Sinyatkin, E.V. Starostina, V.N. Zhilich, A.A. Zhukov, A.N. Zhuravlev
    BINP SB RAS, Novosibirsk, Russia
  • C. Todyshev
    Budker Institute of Nuclear Physics, Novosibirsk, Russia
  
  VEPP-4M is an electron positron collider equipped with the universal KEDR detector for HEP experiments in the beam energy range from 1 GeV to 6 GeV. A unique feature of VEPP 4M is the high precision beam energy calibration by resonant polarization technique which allows conducting of interesting experiments despite the low luminosity of the collider. Recently we have started new luminosity acquisition run above 2 GeV. The hadron cross section was measured from 2.3 GeV to 3.5 GeV has been done. The luminosity run for gamma-gamma physics has been started. The luminosity at Y(1S) meson has been obtained. For the beam energy calibration the laser polarimeter is used. The paper discusses recent results from VEPP 4M collider.  
slides icon Slides TUA01 [4.705 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUA01  
About • Received ※ 25 September 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 22 October 2021
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TUA02 Current Status of VEPP-5 Injection Complex positron, injection, operation, controls 37
 
  • Yu.I. Maltseva, A.V. Andrianov, K.V. Astrelina, V.V. Balakin, A.M. Barnyakov, A.M. Batrakov, O.V. Belikov, D.E. Berkaev, D. Bolkhovityanov, F.A. Emanov, A.R. Frolov, G.V. Karpov, A.S. Kasaev, A.A. Kondakov, N.Kh. Kot, E.S. Kotov, G.Y. Kurkin, R.M. Lapik, N.N. Lebedev, A.E. Levichev, A.Yu. Martynovsky, P.V. Martyshkin, S.V. Motygin, A.A. Murasev, V. Muslivets, D.A. Nikiforov, A.V. Pavlenko, A.M. Pilan, Yu.A. Rogovsky, S.L. Samoylov, A.G. Tribendis, S. Vasiliev, V.D. Yudin
    BINP SB RAS, Novosibirsk, Russia
  • A.V. Andrianov, V.V. Balakin, F.A. Emanov, E.S. Kotov, A.E. Levichev, Yu.I. Maltseva, D.A. Nikiforov, A.V. Pavlenko, Yu.A. Rogovsky
    NSU, Novosibirsk, Russia
  • A.G. Tribendis
    NSTU, Novosibirsk, Russia
  
  VEPP-5 Injection Complex (IC) supplies VEPP-2000 and VEPP-4 colliders at Budker Institute of Nuclear Physics (BINP, Russia) with high energy electron and positron beams. Since 2016 the IC has shown the ability to support operation of both colliders routinely with maximum positron storage rate of 1.7·1010 e+/s. Stable operation at the energy of 430 MeV has been reached. Research on further improvements on the IC performance is carried out. In particular control system was improved, additional beam diagnostics systems were developed, monitoring of RF system was upgraded. In this paper, the latest achieved IC performance, operational results and prospects are presented.  
slides icon Slides TUA02 [2.966 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUA02  
About • Received ※ 28 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 11 October 2021
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TUB04 Development of the Electron Cooling System for NICA Collider gun, high-voltage, solenoid, collider 48
 
  • M.I. Bryzgunov, A.M. Batrakov, E.A. Bekhtenev, O.V. Belikov, A.V. Bubley, V.A. Chekavinskiy, A.P. Denisov, M.G. Fedotov, A.D. Goncharov, K. Gorchakov, V.C. Gosteyev, I.A. Gusev, I.V. Ilyin, A.V. Ivanov, G.V. Karpov, M.N. Kondaurov, N.S. Kremnev, V.M. Panasyuk, V.V. Parkhomchuk, D.N. Pureskin, A.A. Putmakov, V.B. Reva, D.V. Senkov, K.S. Shtro, D.N. Skorobogatov, R.V. Vakhrushev, A.A. Zharikov
    BINP SB RAS, Novosibirsk, Russia
  • E.A. Bekhtenev, A.V. Ivanov, N.S. Kremnev, V.B. Reva
    NSU, Novosibirsk, Russia
  
  The high voltage electron cooling system for the NICA collider is now under development in the Budker Institute of Nuclear Physics (Russia). The aim of the cooler is to increase ion beams intencity during accumulation and to decrease both longitudinal and transverse emmitances of colliding beams during experiment in order to increase luminosity. Status of its development and results of tests of the cooler elements are described in the article.  
slides icon Slides TUB04 [16.028 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB04  
About • Received ※ 04 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 24 October 2021  
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TUC01 Status of the Kurchatov Synchrotron Radiation Source wiggler, controls, vacuum, synchrotron 55
 
  • A.G. Valentinov, A. Belkov, Ye. Fomin, E.V. Kaportsev, V. Korchuganov, Y.V. Krylov, V.I. Moiseev, K. Moseev, N.I. Moseiko, D.G. Odintsov, S.G. Pesterev, A.S. Smygacheva, A.I. Stirin, V.A. Ushakov
    NRC, Moscow, Russia
  
  The Kurchatov synchrotron radiation source goes on to operate in the range of synchrotron radiation from VUV up to hard X-ray. An electron current achieves 150 mA at 2.5 GeV, up to 12 experimental stations may function simultaneously. Improvement of the facility according Federal Program of KSRS modernization is in progress. Two 3 Tesla superconducting wigglers have been installed at main ring at 2019. They were tested with small electron beam current at 2020-2021. Wigglers’ influence on beam parameters is much closed to calculated value. Vacuum system has been upgraded at 2020. In 2021 control system will be completely modified. Manufactoring of third 181 MHz RF generator, new preliminary amplification cascades and new waveguides for all three generators continues in Budker Institute (Novosibirsk). Preparation of great modernization of the whole facility according Federal Program for science infrastructure development has been started.  
slides icon Slides TUC01 [17.060 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUC01  
About • Received ※ 24 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 09 October 2021  
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TUC03 Development of Powerful Long-Pulse THz-Band FEL Driven by Linear Induction Accelerator FEL, undulator, experiment, simulation 58
 
  • N.Yu. Peskov, V.I. Belousov, N.S. Ginzburg, D.I. Sobolev, V.Yu. Zaslavsky
    IAP/RAS, Nizhny Novgorod, Russia
  • A.V. Arzhannikov, D.A. Nikiforov, E.S. Sandalov, S.L. Sinitsky, D.I. Skovorodin, A.A. Starostenko, K.I. Zhivankov
    BINP SB RAS, Novosibirsk, Russia
  
  Funding: This work is supported by the Russian Science Foundation (grant #19-12-00212).
Project of high-power long-pulse THz-band FEL is under development in collaboration between BINP (Novosibirsk) and IAP RAS (N.Novgorod) driven by the linac LIU 5 - 20 MeV / 2 kA / 200 ns. The aim of this project is to achieve a record sub-GW power level and pulse energy content up to 10 - 100 J at THz frequencies. Principal problems in realization of this generator include: formation of the electron beam with parameters acceptable for operation in the short-wavelength ranges, development of undulator for pumping operating transverse oscillations in the beam, and elaboration of electrodynamic system that can provide stable narrow-band oscillation regime in a strongly oversized interaction space. Initial proof-of-principle experiments are planned to start at the LIU-5 accelerator in the 0.3 THz frequency range, with prospects of transition to 0.6 THz range and higher frequencies after positive results would be demonstrated. In the report, the design parameters of the FEL project are discussed. Results of electron-optical experiments on the beam formation are presented. Structural elements of the FEL magnetic system based on helical undulator and a guide solenoid that provides intense beam transportation were elaborated. An electrodynamic system was proposed exploiting advanced Bragg structures, which have significantly improved selective properties. Structures of such type were designed with the diameter of 20 and 40 wavelengths for operation in specified frequency ranges. 		 
slides icon Slides TUC03 [4.780 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUC03  
About • Received ※ 24 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 28 September 2021
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TUPSB04 Features of the Electronic Cooling System of the NICA Booster booster, experiment, gun, cathode 236
 
  • A.G. Kobets, E.V. Ahmanova, S.A. Melnikov, I.N. Meshkov, O. Orlov, S.V. Semenov, A.S. Sergeev, A.A. Sidorin
    JINR, Dubna, Moscow Region, Russia
  • A.V. Butenko, K.G. Osipov, A.O. Sidorin, E. Syresin
    JINR/VBLHEP, Dubna, Moscow region, Russia
  • A.V. Ivanov
    BINP SB RAS, Novosibirsk, Russia
  
  The report presents the results obtained during the commissioning the Electron Cooling System (ECS) of the Booster, the first in the chain of three synchrotrons of the NICA accelerator complex. The work was performed without an ion beam and with a circulating ion beam He1+. In the work with a circulating ion beam, the effect of reducing the lifetime of the circulating ions was observed when the velocities of the cooling electrons and the cooled ions coincide. The dependences of the electron beam current on the ECS parameters for different electron energy values were experimentally obtained. The specific features of operation of electron gun of the NICA Booster are hollow beam formation and the phenomenon of virtual cathode creation confirmed both experiments and by numerical simulation.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB04  
About • Received ※ 20 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021
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TUPSB07 Particle Collimation in the NICA Collider collider, collimation, scattering, dipole 242
 
  • O.S. Kozlov, I.N. Meshkov
    JINR, Dubna, Moscow Region, Russia
  • E. Syresin
    JINR/VBLHEP, Dubna, Moscow region, Russia
  
  The system of particles collimation developed for the NICA collider is considered. The main collimation goal is the beam halo cleaning to minimize the background for experiment. The main mechanisms of particle losses, including the ion recombination in electron cooler, are also reviewed.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB07  
About • Received ※ 24 September 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 18 October 2021
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TUPSB20 Selection of a System for Correcting the Energy Spread of Relativistic Electron Bunches for a Free Electron Laser GUI, wakefield, radiation, ECR 268
 
  • A. Altmark, N.A. Lesiv, K. Mukhamedgaliev
    LETI, Saint-Petersburg, Russia
  
  The object of this work is a device called dechirper, which is used to decrease energy spread in relativistic electron bunch for free electron laser application. This system is based on cylindrical dielectric waveguide with vacuum channel needed for electron bunch passing. The Vavilov-Cherenkov radiation excited in waveguide is used to profile electromagnetic field inside the bunch and as a consequence to achieve the required energy distribution. The work includes numerical modeling of the electron beam passage through a waveguide structure, the generation of wake radiation and the interaction of this radiation with an electron bunch. We made original code to carry out numerical modeling, where the method of macroparticles and the method of Green’s function are implemented. The dependences of the energy compression coefficient and the length at which the maximum energy compression coefficient is achieved on various parameters of the dielectric waveguide structure and the physical parameters of electron bunches were identified. Various recommendations were also made on the choice of a waveguide used as a dechirper.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB20  
About • Received ※ 27 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 08 October 2021
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TUPSB21 System for Correcting the Longitudinal Length of Electron Bunches for Generation a Free Electron Laser wakefield, laser, simulation, dipole 271
 
  • A. Altmark, N.A. Lesiv, K. Mukhamedgaliev
    LETI, Saint-Petersburg, Russia
  
  The chicane is device for longitudinal compression of electron bunch for generation of coherent radiation in free electron laser. It is present a numerical simulation of beam dynamics passing through system which consist dielectric waveguide and four dipole magnets. The simulations made with use the modified Euler method based on Green function knowledge for cylindrical dielectric waveguide. We researched influence of various physical parameters of the electron bunch, as well as the chicane parameters on the change in the longitudinal bunch length. The optimal parameters of the focusing system were proposed for a relativistic particle beam with given initial bunch parameters. Recommendations for the selection of chicane parameters are also presented.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB21  
About • Received ※ 27 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 21 October 2021
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TUPSB22 Wakefield Undulator Based on a Sinusoidal Dielectric Waveguide GUI, undulator, wakefield, radiation 274
 
  • I.L. Sheinman, O.S. Alekseeva
    LETI, Saint-Petersburg, Russia
  
  The idea of creating an undulator based on the wake principle by passing a beam through a sinusoidal dielectric waveguide is proposed. A numerical analysis of the dynamics of a short electron beam in a wake undulator on a bending wave of a waveguide with a dielectric filling is carried out. The possibility of reducing the instability of the beam by choosing the initial phase of the flexural wave and the initial transverse positioning of the beam is considered.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB22  
About • Received ※ 19 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 28 September 2021  
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TUPSB28 X-ray Thomson Inverse Scattering from Periodically Modulated Laser Pulses laser, radiation, scattering, HOM 283
 
  • D.Yu. Sergeeva, A.A. Tishchenko
    MEPhI, Moscow, Russia
  • D.Yu. Sergeeva
    BelSU/LRP, Belgorod, Russia
  • D.Yu. Sergeeva, A.A. Tishchenko
    NRC, Moscow, Russia
  • A.A. Tishchenko
    BNRU, Belgorod, Russia
  
  Funding: This work is performed within the project supported by the Russian Foundation for Basic Research (RFBR), grant # 19-29-12036
Being a compact source of x-rays based on the Thomson backscattering Thomson source has potential to be used in medicine and biology and in other area where narrow band x-ray beams are essential. We suggest and investigate theoretically the idea to use laser pulses modulated with a short period in Thomson backscattering. The coherent radiation is obtained with intensity proportional to the squared number of micro-pulses in the whole laser pulse. 		 
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB28  
About • Received ※ 23 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 21 October 2021  
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TUPSB29 Geant4 for Inverse Compton Radiation Source Simulations laser, photon, scattering, radiation 286
 
  • A.A. Savchenko, D.Yu. Sergeeva, A.A. Tishchenko
    MEPhI, Moscow, Russia
  • A.A. Savchenko, D.Yu. Sergeeva, A.A. Tishchenko
    NRC, Moscow, Russia
  • A.A. Savchenko, A.A. Tishchenko
    BNRU, Belgorod, Russia
  • D.Yu. Sergeeva
    BelSU/LRP, Belgorod, Russia
  
  Funding: This work was supported by the RFBR grant 19-29-12036.
Compton backscattering* is a promising mechanism for engineering of a bright, compact and versatile X-ray source: with dimensions being significantly smaller, the brightness of this source is comparable with that of synchrotron radiation. Nowadays, active researches are underway on various aspects of this phenomenon** aiming at increasing of radiation intensity and quality. In modern science, such kind of research is necessarily accompanied by the computer simulations. In this report, we are talking about creation and implementation of the Compton backscattering module into the Geant4 package***, which is the leading simulation toolkit in high-energy physics, accelerator physics, medical physics, and space studies. Created module of Compton backscattering has been implemented as a discrete physical process and operates with a fixed light target (a virtual volume with the properties of a laser beam), with which a beam of charged particles interacts. Such a description allows user to flexibly change necessary parameters depending on the problem being solved, which opens up new possibilities for using Geant4 in the studied area.
* K.T. Phuoc et al., Nat. Photonics 6, 308 (2012).
** A. Ovodenko et al., Appl. Phys. Lett. 109, 253504 (2016).
*** S. Agostinelli et al., Nucl. Instrum. Meth. A 506, 250 (2003). 		 
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB29  
About • Received ※ 17 September 2021 — Revised ※ 22 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 02 October 2021
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TUPSB33 2.5 GeV Booster Synchrotron for a New Kurchatov Synchrotron Radiation Source booster, synchrotron, lattice, storage-ring 293
 
  • A.S. Smygacheva, Ye. Fomin, V. Korchuganov, V.A. Ushakov, A.G. Valentinov
    NRC, Moscow, Russia
  
  The Project of complete modernization of the current accelerator complex is in progress in the NRC «Kurchatov Institute». A new booster synchrotron is a part of the injection complex for a new 3-d generation synchrotron light source. The booster has to ensure reliable and stable operation of the upgraded main storage ring. The paper presents the final design of the new booster synchrotron and its main parameters.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB33  
About • Received ※ 22 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 16 October 2021  
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TUPSB39 Study of Space Charge Compensation Process of a 400 KeV Pulsed Hydrogen Ion Beam space-charge, plasma, focusing, ion-source 313
 
  • A. Belov, O.T. Frolov, S.A. Gavrilov, L.P. Nechaeva, A.V. Turbabin, V. Zubets
    RAS/INR, Moscow, Russia
  
  Funding: Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia
A three grid energy analyzer of slow secondary ions with a twin analyzing grid is described. The analyzer has cylindrical geometry and Pi angle for recording of the slow ions. The analyzer has been used for measurements of degree of space-charge compensation (SCC) of a pulsed hydrogen ion beam with energy of 400 keV and peak beam current of 60 mA. Results of the measurements are presented and compared with theoretical estimations based on model in which the SCC degree is limited by heating of electrons in collisions with fast ions of the beam. 		 
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB39  
About • Received ※ 20 September 2021 — Revised ※ 05 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021
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TUPSB44 Design and Simulation of an S-Band RF Photogun for a New Injector of the Accelerator Linac-200 at JINR gun, laser, cavity, linac 322
 
  • Y.A. Samofalova, V.V. Kobets, M.A. Nozdrin, A. Zhemchugov
    JINR, Dubna, Moscow Region, Russia
  • A.M. Barnyakov
    BINP SB RAS, Novosibirsk, Russia
  
  A new 2.856 GHz S-band RF photogun for the generation of ultrashort electron beams at the LINAC-200 accelerator at JINR is simulated. The beam parameters at the photogun output are determined to meet the requirements of the LINAC-200 injection. The general design of the photogun is presented. The electrodynamic parameters are determined and the accelerating field distribution is calculated. The particle dynamics is simulated and analyzed to obtain the required beam properties.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB44  
About • Received ※ 29 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 17 October 2021
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WEA03 200 MeV Linac Development for the SKIF Light Source Injector linac, bunching, injection, gun 68
 
  • M.V. Arsentyeva, A.V. Andrianov, A.M. Barnyakov, D.I. Chekmenyov, A.E. Levichev, O.I. Meshkov, D.A. Nikiforov, O.A. Pavlov, I.L. Pivovarov, S.L. Samoylov, V. Volkov
    BINP SB RAS, Novosibirsk, Russia
  
  A new synchrotron light source SKIF of the 4th gen-eration is construction at Budker institute of nuclear physics (Novosibirsk, Russia). It consists of the main ring, the booster ring and the linear accelerator. This paper presents design of the linear accelerator which is expected to provide electron beams with the energy of 200 MeV. Construction of the linear accelerator is discussed. Description of the linear accelerator main systems is presented.  
slides icon Slides WEA03 [4.794 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEA03  
About • Received ※ 20 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021
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WED05 Nondestructive Diagnostics of Accelerated Ion Beams With MCP-Based Detectors at the Accelerator Complex NICA. Experimental Results and Prospects detector, booster, diagnostics, vacuum 82
 
  • A.A. Baldin, V.I. Astakhov, A.V. Beloborodov, D.N. Bogoslovsky, A.N. Fedorov, P.R. Kharyuzov, A.P. Kharyuzova, D.S. Korovkin, A.B. Safonov
    JINR, Dubna, Russia
  
  Funding: This work was supported in part by the Russian Foundation for Basic Research, project no.18-02-40097.
Non-destructive ion beam detectors based on micro-channel plates are presented. The design of two-coordinate profilometer situated in the high vacuum volume of the Booster ring is discussed. Experimental data on registration of circulating beam of the Booster in the second run (September 2021) are presented. The possibility of adjustment of the electron cooling system with the help of this detector based on the obtained ex-perimental data is discussed. 		 
slides icon Slides WED05 [5.105 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WED05  
About • Received ※ 05 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 12 October 2021  
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WEPSC03 Multipactor Discharge in Short 5-Gap 80 MHz IH Structures multipactoring, cavity, impedance, simulation 343
 
  • M.M. Bulgacheva, M. Gusarova, M.V. Lalayan
    MEPhI, Moscow, Russia
  
  The results of numerical simulations of multipacting discharge in accelerating Interdigital H-type (IH) cavities are presented in this paper. Optimal design parameters were selected to reduce the number of multipactor electrons. The localization of multipactor trajectories in the short 5-gap 80 MHz IH cavities at various levels of accelerating voltage is considered.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC03  
About • Received ※ 26 September 2021 — Revised ※ 27 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 17 October 2021
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WEPSC04 Accelerating Structure of 8 MeV Electron Linac resonance, GUI, coupling, radiation 346
 
  • A.N. Shein, I.V. Shorikov
    RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia
  • A.V. Telnov
    VNIIEF, Sarov, Russia
  
  Linear resonance electron accelerator LU-10-20 is under operation in RFNC-VNIIEF since 1994*. LU-10-20 is aimed at carrying out radiation processing of materials and researching radiation processes. The energy of accelerated electrons is up to 10 MeV, the average beam power - up to 12 kW. This accelerator has demonstrated that it is highly useful for performing radiation researches and tests. As of today work is underway on modernization of LU-10-20 including its accelerating structure and RF power supply. Accelerating structure is aimed at electron beam acceleration up to nominal energy and consists of complicated resonance TW RF structure, which uncluded iris-loaded waveguide, input and output matching devices. The paper presents the electrodynamic calculation results of modernized accelerating structure, input and output matching devices, and also beam dynamics calculation results.
*N.V.Zavyalov et al. Commercial linear accelerator of electrons LU-10-20. Materials of the XV All-Union Seminar on Linear Accelerators of Charged Particles, Nucl. Phys. Res.No2, 3(29, 30),1997, p.39-41. 		 
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC04  
About • Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 18 October 2021
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WEPSC05 Modeling of the Energy Compression System SLED for the LINAC-200 Accelerator cavity, linac, klystron, coupling 349
 
  • K. Yunenko, M. Gostkin, V.V. Kobets, A. Zhemchugov
    JINR, Dubna, Moscow Region, Russia
  
  This paper is devoted to the research of the possibility of increasing the output energy of an electron beam at the LINAC-200 linear accelerator by using the SLED energy compression system with constant parameters of the storage cavities. In order to select the necessary parameters and characteristics for the successful creation of this system on the acceleratorm, the SLED system structure simulation and the characteristics of cylindrical hollow resonators calculation were conducted using the CST MICROWAVE STUDIO program.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC05  
About • Received ※ 18 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021
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WEPSC06 Asess Input Data Uncertainties in Thermal-Mechanical Calculations of the Outlet Window Membrane of the LUE-200 Accelerator neutron, operation, simulation, experiment 352
 
  • I.V. Burkov
    JINR/FLNP, Moscow Region, Russia
  • A.P. Sumbaev
    JINR, Dubna, Moscow Region, Russia
  
  The maximum values of the temperature fields and stress-strain state are calculated for various configurations of the outlet window membrane of the LUE-200 accelera-tor with assessing uncertainties in input data. The ther-momechanical parameters are estimated by simulating the electron beam pulsed action mode on the membrane in the computational models based on the mathematical description of the most significant physical processes. The obtained numerical modelling results demonstrated the importance of assessing uncertainties in input data for substantiating the safe operation limits of IREN facility.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC06  
About • Received ※ 24 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 09 October 2021
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WEPSC16 Numerical Research of Design Solutions for the Bending Magnets of the Electron Beam Facility GESA-1M target, simulation, space-charge, site 376
 
  • N.I. Kazachenko, E.I. Gapionok, V.P. Kukhtin, I.Yu. Rodin, K.I. Tkachenko
    NIIEFA, St. Petersburg, Russia
  • D.A. Ovsyannikov, S.E. Sytchevsky
    Saint Petersburg State University, Saint Petersburg, Russia
  
  Comparative simulations of magnet configurations have been performed searching for the optimum design of bending magnets for the intense pulsed electron beam facility GESA-1M. GESA-1M is used for improvement of material surface properties and is capable to generate a 120 kV, 10 A/cm2, 50 mks electron beam with the diameter of 10 cm. One of specific concerns is to prevent the beam path from contamination withμparticles of treated materials. To overcome this problem a system of bending magnets is used. The beam trajectory through electric and magnetic fields was simulated for three candidate configurations of the bending magnets. A comparison was focused on the expected power density and divergence angle at the target. The most efficient concept was found to be two pairs of coils arranged orthogonally to each other. This configuration produces highly uniform distribution of the current density at the target, the divergence angle being as low as several degrees. An important advantage is that the initial beam power can be intensified by a 20% at the target.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC16  
About • Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021
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WEPSC36 Simulation of the Coherent Radiation Interferometry for the Beam Temporal Structure Diagnostics radiation, detector, simulation, target 413
 
  • D.A. Shkitov, M. Shevelev, S. Stuchebrov, M. Toktaganova
    TPU, Tomsk, Russia
  
  Today, free electron lasers and new facilities that are capable of generating sequences of short electron bunches with a high (THz) repetition rate have widely developed. The existing diagnostic methods for such sequences have limitations or are not applicable. Therefore, it is important to develop new approaches to diagnose the temporal structure of such sequences (trains) in modern accelerators. In this report, we describe a model of coherent radiation interferometry using a Michelson interferometer. The mechanisms of transition and diffraction radiation are selected as the radiation source. The model takes into account the finite target size, the parameters of the sequence structure and the detector characteristics. The simulation results allow us to conclude that the analysis of the radiation intensity autocorrelation function itself can be applied as diagnostics method of an arbitrary bunch train temporal structure. Based on such method we can obtain information on the bunch number in the train and the distance between bunches.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC36  
About • Received ※ 24 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021
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WEPSC42 RF Cavity Based Charge Detector for a Low Charge Ultra Sort Singe Electron Bunch Measurement detector, cavity, experiment, linac 423
 
  • V. Gubin
    Institute of Laser Physics, SB RAS, Novosibirsk, Russia
  • A.M. Barnyakov, S.L. Samoylov, D.P. Sukhanov
    BINP SB RAS, Novosibirsk, Russia
  
  Nowadays project of laser-driven Compton light source started in ILP SB RAS in collaboration with BINP SB RAS. It is expected production of 1-10 pC electron beams sub-ps time range duration with energies up to 100-150 MeV as result of the first stage of the project. It is necessary to have the non-destructive charge detector for on line measurements during experiments. We proposed detector based on reentrant RF resonator technology. Singe circular cylinder geometry of measuring RF cavity is insensitive to electron beam position and size as well as time structure of bunch (on the assumption of sufficiently short bunch). Base data of cavity are close to acceleration section elements of VEPP-5 linac. Prototype of detector successfully tested at the VEPP-5 electron linac. Measured charge of single bunch reaches down to 1 pC and less. This paper presents the results of development and testing of diagnostics  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC42  
About • Received ※ 21 September 2021 — Revised ※ 06 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021
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WEPSC44 Beam Loss Monitoring System for the SKIF Synchrotron Light Source storage-ring, operation, simulation, diagnostics 426
 
  • Yu.I. Maltseva, A.D. Khilchenko, O.I. Meshkov, A.A. Morsina
    BINP SB RAS, Novosibirsk, Russia
  • S.V. Ivanenko, E.A. Puryga
    Budker Institute of Nuclear Physics, Novosibirsk, Russia
  • X.C. Ma
    BINP, Novosibirsk, Russia
  • Yu.I. Maltseva, O.I. Meshkov
    NSU, Novosibirsk, Russia
  • A.A. Morsina
    NSTU, Novosibirsk, Russia
  
  The Siberian ring source of photons (SKIF) is a new 3 GeV fourth-generation synchrotron light source being developed by the Budker Institute of Nuclear Physics (BINP). In order to ensure its reliable operation, beam loss diagnostics system is required. Two types of beam loss monitors will be installed at the SKIF: 5 fiber-based Cherenkov Beam Loss Monitors (CBLM) for the linac and transfer lines and 128 Scintillator-based Beam Loss Monitors (SBLM) for the storage ring. Sophisticated electronic equipment are employed to use these monitors at different SKIF operating modes. The article describes the design of the SKIF beam loss diagnostics system based on numerical simulations and experimental studies.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC44  
About • Received ※ 08 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 18 October 2021  
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WEPSC45 Measurement of the Electron Beam Spectrum by the Absorbing Filters Method During a Single Pulse experiment, gun, operation, high-voltage 430
 
  • A.A. Drozdovsky, A.V. Bogdanov, S.A. Drozdovsky, A.V. Kantsyrev, A. Khurchiev, V.A. Panyushkin, S.M. Savin, A.V. Skobliakov, S.A. Visotski, V.A. Volkov
    ITEP, Moscow, Russia
  
  Funding: Work supported by R&D Project between NRC "Kurchatov Institute" - ITEP and TRINITI
The interest in measuring spectrum of electron beams by the method of absorbing filters is due to its technical accessibility, compactness, efficiency and usability at various research facilities. The complexity of this method lies in severe ill-posedness of the inverse problem of reconstruction the spectrum from the beam absorption. The task of our work is the operational control of the spectrum of a beam with the maximum energy up to 300 keV. The current collector package consists of 16 insulated identical aluminum foils with the 1 mm gap between. The thickness range of the foils is 10 to 25 microns, depending on the maximum electron energy. The charge of the foils after passing the beam is measured by the ADC. The assembly geometry was calculated by the Monte Carlo method to determine the accumulation of charges on foils when monoenergetic beams are transmitted in the range from 10 to 300 keV with step increment of 10 keV. The inverse problem was solved by Tikhonov regularization. It turned out that a high-accuracy fitting of the input data and the transformation kernel by statistical distributions is the primary factor, which allows to reduce the regularization parameter to almost zero. The validity of the technique applied is confirmed by the fact that the spectrum obtained at the maximum electron energy of the beam of 250 keV is in satisfactory agreement with the spectrum measured on a magnetic spectrometer. 		 
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC45  
About • Received ※ 20 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 09 October 2021
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WEPSC57 System of on-Line Energy Control of Electron Beam for Accelerator monitoring, controls, detector, radiation 446
 
  • N.N. Kurapov, Ya.V. Bodryashkin, A.S. Cherkasov, I.V. Shorikov
    RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia
  • A.V. Telnov
    VNIIEF, Sarov, Russia
  
  There arises a need for measuring the output electron energy in the on-line mode during set-up, adjustment or operation of an accelerator. For this purpose a system is developed, allowing an on-line control of an accelerated electron energy spectrum simultaneously with average current measurement. This system is meant for reconstruction of the energy spectrum of accelerated electrons in the energy range from 1 up to 10 MeV at the average beam current from 20 up to 150 µA. The system is based on the method of absorbing filters and consists of an assembly, absorbing an accelerated electron beam, and a measuring system. The absorption assembly represents a set of insulated from each other electro-conducting plates of dimension 100x100 mm and thickness from 0.15 up to 1 mm with an air gap between plates 2 mm. The operation involves development, manufacture and calculation of electron beam transmission through the absorption assembly, development and manufacture of hardware for automated measuring of absorbed charges in the assembly elements, development of a master computer program as well as a program of energy spectrum reconstruction, using measured and calculated data, testing of the energy on-line control system on the LU-10-20 linear resonance electron accelerator. Tests of the developed sample on the electron accelerator have proved the applicability of the system to control the electron beam energy in the real-time mode.  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC57  
About • Received ※ 27 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 22 October 2021
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THC03 Numerical Simulations of Space Charge Dominated Beam Dynamics in Experimentally Optimized PITZ RF Photogun cathode, experiment, space-charge, laser 89
 
  • V.I. Rashchikov, S.M. Polozov
    MEPhI, Moscow, Russia
  
  Funding: The reported study was partly funded by RFBR, project number 19-29-12036
Discrepancies between experimental data and comput-er simulation results of picosecond highly charged beam photoemission are discussed. New space charge limited emission numerical model with positively charged ions arising in the cathode region and dynamically changing during the emission is presented. Estimates on the time characteristics of the charge migrating process in the semiconductor region are given. The numerical results are compared with the results of other numerical models and with experimental observations at the Photo Injector Test facility at DESY in Zeuthen (PITZ) 		 
slides icon Slides THC03 [1.292 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-THC03  
About • Received ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 17 October 2021  
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FRA04 The Experimental Research of Cyclotron DC-280 Beam Parameters cyclotron, controls, experiment, diagnostics 102
 
  • V.A. Semin, K. Gikal, I.V. Kalagin, N.Yu. Kazarinov, V.I. Mironov, S.V. Mitrofanov, Yu.G. Teterev
    JINR, Dubna, Moscow Region, Russia
  • A. Issatov, L.A. Pavlov, A.A. Protasov
    JINR/FLNR, Moscow region, Russia
  
  The DC-280 is the high intensity cyclotron for Super Heavy Elements Factory in FLNR JINR. It was designed for production of accelerated ions beam with intensity up 10 pµA to energy in range 4 - 8 MeV/n. The beam power is up 3,5 kW. The diagnostics elements shall be capable of withstanding this power. Moreover such intensity beam required continuous control for avoid of equipment damage. Special diagnostic equipment were designed, manufactured and commissioning. During the design the calculation of thermal loads was made. Some of them were tested before installation on cyclotron. Diagnostic elements used on DC-280 cyclotron are described in this paper. The special Faraday cup was designed for beam cur-rent measurement. The moving inner probe and multylamellar probe are inside the cyclotron. The Scanning two-dimension ionization profile monitor was produced for space distribution analysis of accelerated high intensity beam. Inner Pickup electrode system with special elec-tronic was created for beam phase moving analysis. Time of flight system based on two pick-up electrodes for energy measured was placed in transport channel. These and over diagnostic system were commissioned and tested. The results present in report.  
slides icon Slides FRA04 [16.527 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRA04  
About • Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 13 October 2021 — Issued ※ 22 October 2021
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FRB02 Accelerators of ELV Series: Current Status and Further Development extraction, operation, power-supply, status 111
 
  • D.S. Vorobev, E.V. Domarov, S. Fadeev, M. Golkovsky, Yu.I. Golubenko, D.A. Kogut, A.I. Korchagin, N.K. Kuksanov, A. Lavrukhin, P.I. Nemytov, R.A. Salimov, A.V. Semenov
    BINP SB RAS, Novosibirsk, Russia
  
  For many years Budker Institute of Nuclear Physics produces medium-energy industrial electron beam accelerators. Flexible (due to the possibility of completing with different systems) and reliable accelerators cover the energy range from 0.3 to 3 MeV, and up to 130 mA of beam current, with power up to 100 kW. High electrical efficiency allows the use of accelerators in almost all areas of radiation technology, from cross-linking of the insulation, heat shrinkable tubes and films to the production of foamed polyethylene and modification of rubber blanks for tires. All models have a unified design with a difference in overall dimensions, the length of the accelerating tube, the number of high-voltage rectifier sections, and the type of extraction device. This makes it easy to adapt the accelerators to the requirements of the technology line. ELV accelerator with an energy range of 0.3-0.5 MeV, beam current up to 130 mA, and power up to 100 kW was successfully designed, tested, and installed on the customer’s site. The accelerator is compact in overall dimensions and installed in the local steel shielding. The electron beam is extracted through a two-windows extraction system with one titanium foil 180 mm wide. New accelerators of the ELV type are also being developed. Namely ELV-15 with energy range up to 3.0 MeV and power up to 100 kW. At present time accelerator was assembled and under testing in Novosibirsk.  
slides icon Slides FRB02 [5.380 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB02  
About • Received ※ 26 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 11 October 2021  
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FRB03 Upgrated the Extraction Device of Focused Electron Beam Into the Atmosphere focusing, extraction, cathode, permanent-magnet 114
 
  • E.V. Domarov, I. Chakin, V.G. Cherepkov, S. Fadeev, M. Golkovsky, Yu.I. Golubenko, A.I. Korchagin, N.K. Kuksanov, A. Lavrukhin, P.I. Nemytov, R.A. Salimov, A.V. Semenov
    BINP SB RAS, Novosibirsk, Russia
  
  For over 30 years, an extraction device has been successfully working in BINP at the ELV-6 accelerator to extract a focused beam of electrons into the atmosphere. The accelerating tube with permanent magnetic lenses was used in this installation. The design of these accelerator tubes with magnetic lenses is rather complicated. Recently, simpler design and high reliability accelerating tubes with big aperture is operating in ELV accelerators. For this reason, the problem number one at present is to develop the extraction device, capable of reliably working with serial accelerator tubes, of the ELV accelerator with power up to100 kW. The lens L1 is located directly at the lower end of the accelerating tube. Passing the lens L1, the beam is focused near the diaphragm D6 and increases to a diameter of 10 mm in the diaphragm D5. For passing the beam along the axis of the diaphragms, there are corrections coils C1 C2 C3. The diameter of diaphragm hole D1 is the most critical, because it determines the flow of gas that should be pumped out in the following steps of the vacuum system. Measurements of the parameters of a high-power electron beam were carried out up to a power of 100 kW. As a result of the made experiments the minimum diameter of the beam at the exit from the extractions device has been 2 mm at the energy of 1,4 MeV and the beam current of 60 mA.  
slides icon Slides FRB03 [2.785 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB03  
About • Received ※ 02 September 2021 — Revised ※ 15 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 19 October 2021
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