RuPAC2021 - List of Keywords (linac)

Paper	Title	Other Keywords	Page
MOX02	Development and Implementation of Bunch Shape Instrumentation for Ion Linacs	electron, 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 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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MOPSA04	The Tuning of RF Parameters of 40 MHz RFQ	rfq, coupling, cavity, Windows	139
	A. Sitnikov, G. Kropachev, T. Kulevoy, D.N. Selesnev, A.I. Semennikov ITEP, Moscow, Russia
	The new linac for A/Z = 8, output energy 4 MeV/u and 10 mA current is under development at NRC "Kurchatov Institute" - ITEP. The linac consists of Radio-Frequency Quadrupole (RFQ) and two sections of Drift Tube Linac (DTL). The 40 MHz 11 meters long RFQ is based on a 4-vane structure with magnetic coupling windows. The paper presents results of tuning radio-frequency (RF) RFQ parameters.
	Poster MOPSA04 [1.243 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA04
About •	Received ※ 24 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 16 October 2021
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MOPSA06	Parameters of the Normal Conducting Accelerating Structure for the Up to 1 GeV Hadron Linacs	cavity, coupling, multipactoring, hadron	142
	I.V. Rybakov, A. Feschenko, L.V. Kravchuk, V.V. Paramonov, V.L. Serov RAS/INR, Moscow, Russia
	Compensated bi-periodic accelerating structure Cut Disk Structure (CDS) was developed for accelerating particle beams at beta eq 1. In the papers dedicated to the development of this structure, a significant decrease in Ze was shown for medium energies range, beta 0.4-0.5. For high-intensity hadron linacs, this energy range, in which particles are captured to acceleration from the drift tube structure, is of the greatest interest. In this paper, a set of CDS parameters was obtained, which provides a Ze value not lower in the comparison to the proven structures in the medium energy range. By the comparison of the electrodynamic and technological parameters of CDS with these structures, the advantages of its application in multi-section cavities for the up to 1 GeV linacs are shown. The selection of optimal cells manufacturing tolerances, the method of its tuning before brazing and frequency parameters control, and the selection of the method for multipactor discharge suppression are determined. The results of the sketch project of the CDS cavity numerical simulation as a non-uniform coupled system and optimization of the transition part of sections and bridge devices are presented.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA06
About •	Received ※ 22 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 16 October 2021
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MOPSA07	200 MeV Linear Electron Accelerator - Pre-Injector for a New Kurchatov Synchrotron Radiation Source	simulation, injection, synchrotron, ion-source	145
	I.A. Ashanin, S.M. Polozov, A.I. Pronikov, V.I. Rashchikov MEPhI, Moscow, Russia I.A. Ashanin, V. Korchuganov, S.M. Polozov, A.I. Pronikov, V.I. Rashchikov, V.A. Ushakov NRC, Moscow, Russia
	New linear electron accelerator (linac) with an energy of about 200 MeV (or 300 MeV in a high-energy version) is being proposed for injection into the booster synchrotron, which is being developed for the reconstruction of the SIBERIA-2 accelerator complex with the aim of upgrade to 3rd generation source at the NRC «Kurchatov Institute». A modernized linac and its specific elements layout will described in the report. The modeling of accelerating structure and optimization of electrodynamics characteristics and fields distribution and geometric in order to reduce the beam spectrum at the output of the linac was done. A step-by-step front-to-end beam dynamics simulation results will discuss.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA07
About •	Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 12 October 2021
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MOPSA08	Beam Dynamics Simulation in a Linear Electron Accelerator - Injector for the 4th Generation Specialized Synchrotron Radiation Source USSR	simulation, gun, injection, cathode	149
	I.A. Ashanin, Yu.D. Kliuchevskaia, S.M. Polozov, A.I. Pronikov MEPhI, Moscow, Russia I.A. Ashanin, S.M. Polozov, A.I. Pronikov NRC, Moscow, Russia
	USSR project (Ultimate Source of Synchrotron Radiation, 4th generation synchrotron light source) is being developed in the NRC «Kurchatov Institute». This Light Source will include both storage ring and soft FEL (Free Electron Laser) and one linac with an energyof 6 GeV, which is planned to be used both for beam injection into storage ring (top-up injection) and as a high-brightness bunch driver for FEL. It is suggested to use two front-ends in this linac: RF-gun with thermionic cathode with adiabatic buncher for injection into storage ring and RF-gun with photocathode will use to generate a bunch train for FEL. The purpose of this work was to development a general layout of the top-up linac with the aim of minimize of the beam energy spread and transverse emittance at the exit and analysis the front-to-end beam dynamics in this linear accelerator.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA08
About •	Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 09 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	simulation, heavy-ion, electron, 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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MOPSA41	Effect of a Proton Beam from a Linear Accelerator for Radiation Therapy	proton, radiation, simulation, distributed	182
	L. Ovchinnikova, S.V. Akulinichev, A.P. Durkin, A. Kolomiets, V.V. Paramonov RAS/INR, Moscow, Russia A. Kurilik Private Address, Moscow, Russia L. Ovchinnikova Ferrite Domen Co., St. Petersburg, Russia
	Linear accelerators can provide beam characteristics that cannot be achieved by circular accelerators. We refer to the concept of a compact linac for creating a proton accelerator with a maximum energy of 230 MeV, operating in a pulsed mode. The linac is designed to accelerate up to 10¹³ particles per 10 to 200 seconds irradiation cycle and is capable of fast adjustment the output energy in the range from 60 to 230 MeV, forming a pencil-like beam with a diameter of ~2 mm. Simulation of dose distribution from a proton beam in a water phantom has been performed. The radiological effect of the linac beam during fast energy scanning is considered, and the features for providing the high dose rate flash radiation therapy are specified. The possibility of a magnetic system for increasing the transverse dimensions of the beam-affected region is discussed.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA41
About •	Received ※ 28 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021
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MOPSA42	Compact S-Band Accelerating Structure for Medical Applications	coupling, electron, 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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TUX01	Status of the HIAF Accelerator Facility in China	ECR, injection, cavity, vacuum	23
	J.C. Yang, D.Q. Gao, Y. He, L.J. Mao, G.D. Shen, L.N. Sheng, L.T. Sun, Z. Xu, Y.Q. Yang, Y.J. Yuan IMP/CAS, Lanzhou, People’s Republic of China
	The High Intensity heavy-ion Accelerator Facility (HIAF) is under constructed at IMP in China. The HIAF main feature is rapid acceleration of ions in the booster synchrotron ring (BRing) with the ramping rate up to 12 T/s. The challenges are related to the systems RF cavities, dipole power supplies, vacuum etc. Works on key prototypes of the HIAF machine are ongoing at IMP. In this paper, the test results of the power supplies, RF cavities and vacuum chambers are presented. As the construction of the HIAF facility has started, an overview of the hardware developments will also be reported.
	Slides TUX01 [17.099 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUX01
About •	Received ※ 13 September 2021 — Revised ※ 27 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 20 October 2021
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TUB07	The Conceptual Design of the 7.5 MeV/u Light Ion Injector	cavity, rfq, simulation, ion-source	51
	S.M. Polozov, A.E. Aksentyev, M.M. Bulgacheva, O.V. Deryabochkin, M.S. Dmitriyev, V.V. Dmitriyeva, M.V. Dyakonov, V.S. Dyubkov, A.V. Gerasimenko, A.A. Gorchakov, M. Gusarova, M.A. Guzov, E.N. Indiushnii, A.M. Korshunov, K.I. Kozlovskiy, A.S. Krasnov, M.V. Lalayan, Y. Lozeev, T.A. Lozeeva, A.I. Makarov, S.V. Matsievskiy, A.P. Melekhov, O.V. Murygin, R.E. Nemchenko, G.G. Novikov, A.E. Novozhilov, A.S. Panishev, V.N. Pashentsev, A.G. Ponomarenko, A.V. Prokopenko, V.I. Rashchikov, A.V. Samoshin, A.A. Savchik, V.L. Shatokhin, A.E. Shikanov, K.D. Smirnov, G.A. Tsarev, S.A. Tumanov, I.A. Yurin, M.I. Zhigailova MEPhI, Moscow, Russia M.L. Smetanin, A.V. Telnov VNIIEF, Sarov, Russia N.V. Zavyalov RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia
	The new linac for light ion beam injection is under development at MEPhI. Such linac was proposed for acceleration of 7.5 MeV/u ion beam with A/Z=1-3 and current up to 5 mA for proton and 0.4 pmA for light ions. The linac general layout will include two types of ion sources: ECR ion source for proton anf He ions and laser ion source for ions form Li to O. Following the LEBT ions will be bunched and accelerated to the final energy using RFQ section and 14 IH cavities. These IH-cavities will be identical (divided into two groups) and independently phased. All cavities will operate on 81 MHz. Results of the beam dynamics simulations and the cavities design will presented in the report.
	Slides TUB07 [5.210 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB07
About •	Received ※ 16 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 14 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, electron, laser, cavity	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	electron, 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 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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WEPSC05	Modeling of the Energy Compression System SLED for the LINAC-200 Accelerator	cavity, electron, 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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WEPSC42	RF Cavity Based Charge Detector for a Low Charge Ultra Sort Singe Electron Bunch Measurement	detector, electron, cavity, experiment	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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WEPSC50	Enhancement of Transverse Beam Phase Space Analysis by Tomography Method at INR Linac	emittance, simulation, quadrupole, cavity	433
	A.I. Titov, S. Bragin, S.A. Gavrilov, O. Volodkevich RAS/INR, Moscow, Russia S.A. Gavrilov, A.I. Titov MIPT, Dolgoprudniy, Moscow Region, Russia
	The investigation of transverse beam phase space parameters behavior along the accelerator is important for proper accelerator tuning. At INR RAS linac transverse emittance and Twiss parameters are reconstructed from beam profile measurements with quadrupole scan technique at several measurement points along the accelerator. Profile treatment is performed with ordinary transverse profiles method and tomographic reconstruction method. Various experimental data is presented. The comparison of the results obtained by the two methods is done. Features of beam dynamics simulation based on the data from these methods are discussed.
	Poster WEPSC50 [6.621 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC50
About •	Received ※ 17 September 2021 — Revised ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 22 October 2021
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WEPSC51	Concept of Decision Support System for INR RAS Linac Beam Tuning	software, factory, detector, network	436
	A.I. Titov, S.A. Gavrilov RAS/INR, Moscow, Russia S.A. Gavrilov, A.I. Titov MIPT, Dolgoprudniy, Moscow Region, Russia
	During the last decade, instruments of machine learning are gaining popularity in accelerator control systems. One of these instruments is decision support system (DSS) that is already successfully used in other fields of science. In this article a motivation for implementation of such system for INR RAS linac tuning is discussed. Concept of developed DSS is presented. Changes in INR RAS linac data acquisition system essential for future DSS operation are proposed.
	Poster WEPSC51 [6.759 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC51
About •	Received ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 01 October 2021
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THA01	Status of the SC HWR Cavities Production for NICA Project	cavity, light-ion, proton, niobium	85
	M. Gusarova, M.V. Lalayan, S.V. Matsievskiy, R.E. Nemchenko, S.M. Polozov, V.L. Shatokhin, N.P. Sobenin MEPhI, Moscow, Russia A.V. Butenko, M.V. Lalayan, E. Syresin, G.V. Trubnikov JINR, Dubna, Moscow Region, Russia D. Bychanok, S.A. Maksimenko INP BSU, Minsk, Belarus V.S. Petrakovsky, I.L. Pobol, A.I. Pokrovsky, A. Shvedov, S.V. Yurevich, V.G. Zaleski Physical-Technical Institute of the National Academy of Sciences of Belarus, Minsk, Belarus G.V. Trubnikov JINR/VBLHEP, Dubna, Moscow region, Russia
	Since 2015 the superconducting (SC) linac-injector development for Nuclotron NICA (JINR, Dubna, Russia) is carried out by the collaboration of JINR, NRNU MEPhI, INP BSU, PTI NASB. This new SC linac is to accelerate protons up to 20 MeV and light ions to 7.5 MeV/u with possible energy upgrade up to 50 MeV for proton beam. This paper reports the current status of the development and manufacturing of superconducting accelerating cavities for a new linear accelerator of the injection complex of the Nuclotron-NICA project.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-THA01
About •	Received ※ 26 September 2021 — Revised ※ 27 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 24 October 2021
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FRB04	A Linear Accelerator for Proton Therapy	proton, acceleration, operation, focusing	117
	V.V. Paramonov, A.P. Durkin, A. Kolomiets RAS/INR, Moscow, Russia
	For applications in proton therapy, linear accelerators can provide beam performances not achievable with cyclic facilities. The results of the development of a proposal for a linac with the maximal proton energy of 230 MeV are presented. Operating in a pulsed mode, with a repetition rate not less than 50 Hz, the linac is designed to accelerate up to 10¹³ protons per irradiation cycle lasting from 10 to 200 seconds. Possibilities of fast, from pulse to pulse, adjustment of the output energy in the range from 60 MeV to 230 MeV, formation and acceleration to the output energy of a "pencil-like" beam with a diameter of ~ 2 mm are shown. Optimized solutions, proposed for both the accelerating-focusing channel and the technical systems of the linac make it possible to create a facility with high both target and technical and economic features. Special attention, due to the selection of proven in long-term operation parameters of the systems, is paid to ensuring the reliability of the linac operation. The feasibility of linac is substantiated on the basis of mastered or modified with a guarantee industrial equipment.
	Slides FRB04 [5.370 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB04
About •	Received ※ 16 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021
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Paper

Title

Other Keywords

Page

MOX02

Development and Implementation of Bunch Shape Instrumentation for Ion Linacs

electron, 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 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

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA04

The Tuning of RF Parameters of 40 MHz RFQ

rfq, coupling, cavity, Windows

139

A. Sitnikov, G. Kropachev, T. Kulevoy, D.N. Selesnev, A.I. Semennikov
ITEP, Moscow, Russia

The new linac for A/Z = 8, output energy 4 MeV/u and 10 mA current is under development at NRC "Kurchatov Institute" - ITEP. The linac consists of Radio-Frequency Quadrupole (RFQ) and two sections of Drift Tube Linac (DTL). The 40 MHz 11 meters long RFQ is based on a 4-vane structure with magnetic coupling windows. The paper presents results of tuning radio-frequency (RF) RFQ parameters.

Poster MOPSA04 [1.243 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA04

About •

Received ※ 24 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 16 October 2021

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MOPSA06

Parameters of the Normal Conducting Accelerating Structure for the Up to 1 GeV Hadron Linacs

cavity, coupling, multipactoring, hadron

142

I.V. Rybakov, A. Feschenko, L.V. Kravchuk, V.V. Paramonov, V.L. Serov
RAS/INR, Moscow, Russia

Compensated bi-periodic accelerating structure Cut Disk Structure (CDS) was developed for accelerating particle beams at beta eq 1. In the papers dedicated to the development of this structure, a significant decrease in Ze was shown for medium energies range, beta 0.4-0.5. For high-intensity hadron linacs, this energy range, in which particles are captured to acceleration from the drift tube structure, is of the greatest interest. In this paper, a set of CDS parameters was obtained, which provides a Ze value not lower in the comparison to the proven structures in the medium energy range. By the comparison of the electrodynamic and technological parameters of CDS with these structures, the advantages of its application in multi-section cavities for the up to 1 GeV linacs are shown. The selection of optimal cells manufacturing tolerances, the method of its tuning before brazing and frequency parameters control, and the selection of the method for multipactor discharge suppression are determined. The results of the sketch project of the CDS cavity numerical simulation as a non-uniform coupled system and optimization of the transition part of sections and bridge devices are presented.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA06

About •

Received ※ 22 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 16 October 2021

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MOPSA07

200 MeV Linear Electron Accelerator - Pre-Injector for a New Kurchatov Synchrotron Radiation Source

simulation, injection, synchrotron, ion-source

145

I.A. Ashanin, S.M. Polozov, A.I. Pronikov, V.I. Rashchikov
MEPhI, Moscow, Russia
I.A. Ashanin, V. Korchuganov, S.M. Polozov, A.I. Pronikov, V.I. Rashchikov, V.A. Ushakov
NRC, Moscow, Russia

New linear electron accelerator (linac) with an energy of about 200 MeV (or 300 MeV in a high-energy version) is being proposed for injection into the booster synchrotron, which is being developed for the reconstruction of the SIBERIA-2 accelerator complex with the aim of upgrade to 3rd generation source at the NRC «Kurchatov Institute». A modernized linac and its specific elements layout will described in the report. The modeling of accelerating structure and optimization of electrodynamics characteristics and fields distribution and geometric in order to reduce the beam spectrum at the output of the linac was done. A step-by-step front-to-end beam dynamics simulation results will discuss.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA07

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Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 12 October 2021

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MOPSA08

Beam Dynamics Simulation in a Linear Electron Accelerator - Injector for the 4th Generation Specialized Synchrotron Radiation Source USSR

simulation, gun, injection, cathode

149

I.A. Ashanin, Yu.D. Kliuchevskaia, S.M. Polozov, A.I. Pronikov
MEPhI, Moscow, Russia
I.A. Ashanin, S.M. Polozov, A.I. Pronikov
NRC, Moscow, Russia

USSR project (Ultimate Source of Synchrotron Radiation, 4th generation synchrotron light source) is being developed in the NRC «Kurchatov Institute». This Light Source will include both storage ring and soft FEL (Free Electron Laser) and one linac with an energyof 6 GeV, which is planned to be used both for beam injection into storage ring (top-up injection) and as a high-brightness bunch driver for FEL. It is suggested to use two front-ends in this linac: RF-gun with thermionic cathode with adiabatic buncher for injection into storage ring and RF-gun with photocathode will use to generate a bunch train for FEL. The purpose of this work was to development a general layout of the top-up linac with the aim of minimize of the beam energy spread and transverse emittance at the exit and analysis the front-to-end beam dynamics in this linear accelerator.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA08

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Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 09 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

simulation, heavy-ion, electron, 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

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Received ※ 28 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 17 October 2021

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MOPSA41

Effect of a Proton Beam from a Linear Accelerator for Radiation Therapy

proton, radiation, simulation, distributed

182

L. Ovchinnikova, S.V. Akulinichev, A.P. Durkin, A. Kolomiets, V.V. Paramonov
RAS/INR, Moscow, Russia
A. Kurilik
Private Address, Moscow, Russia
L. Ovchinnikova
Ferrite Domen Co., St. Petersburg, Russia

Linear accelerators can provide beam characteristics that cannot be achieved by circular accelerators. We refer to the concept of a compact linac for creating a proton accelerator with a maximum energy of 230 MeV, operating in a pulsed mode. The linac is designed to accelerate up to 10¹³ particles per 10 to 200 seconds irradiation cycle and is capable of fast adjustment the output energy in the range from 60 to 230 MeV, forming a pencil-like beam with a diameter of ~2 mm. Simulation of dose distribution from a proton beam in a water phantom has been performed. The radiological effect of the linac beam during fast energy scanning is considered, and the features for providing the high dose rate flash radiation therapy are specified. The possibility of a magnetic system for increasing the transverse dimensions of the beam-affected region is discussed.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA41

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Received ※ 28 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021

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MOPSA42

Compact S-Band Accelerating Structure for Medical Applications

coupling, electron, 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

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Received ※ 01 October 2021 — Revised ※ 02 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 11 October 2021

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TUX01

Status of the HIAF Accelerator Facility in China

ECR, injection, cavity, vacuum

23

J.C. Yang, D.Q. Gao, Y. He, L.J. Mao, G.D. Shen, L.N. Sheng, L.T. Sun, Z. Xu, Y.Q. Yang, Y.J. Yuan
IMP/CAS, Lanzhou, People’s Republic of China

The High Intensity heavy-ion Accelerator Facility (HIAF) is under constructed at IMP in China. The HIAF main feature is rapid acceleration of ions in the booster synchrotron ring (BRing) with the ramping rate up to 12 T/s. The challenges are related to the systems RF cavities, dipole power supplies, vacuum etc. Works on key prototypes of the HIAF machine are ongoing at IMP. In this paper, the test results of the power supplies, RF cavities and vacuum chambers are presented. As the construction of the HIAF facility has started, an overview of the hardware developments will also be reported.

Slides TUX01 [17.099 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUX01

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Received ※ 13 September 2021 — Revised ※ 27 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 20 October 2021

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TUB07

The Conceptual Design of the 7.5 MeV/u Light Ion Injector

cavity, rfq, simulation, ion-source

51

S.M. Polozov, A.E. Aksentyev, M.M. Bulgacheva, O.V. Deryabochkin, M.S. Dmitriyev, V.V. Dmitriyeva, M.V. Dyakonov, V.S. Dyubkov, A.V. Gerasimenko, A.A. Gorchakov, M. Gusarova, M.A. Guzov, E.N. Indiushnii, A.M. Korshunov, K.I. Kozlovskiy, A.S. Krasnov, M.V. Lalayan, Y. Lozeev, T.A. Lozeeva, A.I. Makarov, S.V. Matsievskiy, A.P. Melekhov, O.V. Murygin, R.E. Nemchenko, G.G. Novikov, A.E. Novozhilov, A.S. Panishev, V.N. Pashentsev, A.G. Ponomarenko, A.V. Prokopenko, V.I. Rashchikov, A.V. Samoshin, A.A. Savchik, V.L. Shatokhin, A.E. Shikanov, K.D. Smirnov, G.A. Tsarev, S.A. Tumanov, I.A. Yurin, M.I. Zhigailova
MEPhI, Moscow, Russia
M.L. Smetanin, A.V. Telnov
VNIIEF, Sarov, Russia
N.V. Zavyalov
RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia

The new linac for light ion beam injection is under development at MEPhI. Such linac was proposed for acceleration of 7.5 MeV/u ion beam with A/Z=1-3 and current up to 5 mA for proton and 0.4 pmA for light ions. The linac general layout will include two types of ion sources: ECR ion source for proton anf He ions and laser ion source for ions form Li to O. Following the LEBT ions will be bunched and accelerated to the final energy using RFQ section and 14 IH cavities. These IH-cavities will be identical (divided into two groups) and independently phased. All cavities will operate on 81 MHz. Results of the beam dynamics simulations and the cavities design will presented in the report.

Slides TUB07 [5.210 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB07

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Received ※ 16 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 14 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, electron, laser, cavity

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

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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

electron, 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 WEA03 [4.794 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEA03

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Received ※ 20 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021

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WEPSC05

Modeling of the Energy Compression System SLED for the LINAC-200 Accelerator

cavity, electron, 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

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Received ※ 18 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021

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WEPSC42

RF Cavity Based Charge Detector for a Low Charge Ultra Sort Singe Electron Bunch Measurement

detector, electron, cavity, experiment

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

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC42

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Received ※ 21 September 2021 — Revised ※ 06 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021

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WEPSC50

Enhancement of Transverse Beam Phase Space Analysis by Tomography Method at INR Linac

emittance, simulation, quadrupole, cavity

433

A.I. Titov, S. Bragin, S.A. Gavrilov, O. Volodkevich
RAS/INR, Moscow, Russia
S.A. Gavrilov, A.I. Titov
MIPT, Dolgoprudniy, Moscow Region, Russia

The investigation of transverse beam phase space parameters behavior along the accelerator is important for proper accelerator tuning. At INR RAS linac transverse emittance and Twiss parameters are reconstructed from beam profile measurements with quadrupole scan technique at several measurement points along the accelerator. Profile treatment is performed with ordinary transverse profiles method and tomographic reconstruction method. Various experimental data is presented. The comparison of the results obtained by the two methods is done. Features of beam dynamics simulation based on the data from these methods are discussed.

Poster WEPSC50 [6.621 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC50

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Received ※ 17 September 2021 — Revised ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 22 October 2021

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WEPSC51

Concept of Decision Support System for INR RAS Linac Beam Tuning

software, factory, detector, network

436

A.I. Titov, S.A. Gavrilov
RAS/INR, Moscow, Russia
S.A. Gavrilov, A.I. Titov
MIPT, Dolgoprudniy, Moscow Region, Russia

During the last decade, instruments of machine learning are gaining popularity in accelerator control systems. One of these instruments is decision support system (DSS) that is already successfully used in other fields of science. In this article a motivation for implementation of such system for INR RAS linac tuning is discussed. Concept of developed DSS is presented. Changes in INR RAS linac data acquisition system essential for future DSS operation are proposed.

Poster WEPSC51 [6.759 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC51

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Received ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 01 October 2021

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THA01

Status of the SC HWR Cavities Production for NICA Project

cavity, light-ion, proton, niobium

85

M. Gusarova, M.V. Lalayan, S.V. Matsievskiy, R.E. Nemchenko, S.M. Polozov, V.L. Shatokhin, N.P. Sobenin
MEPhI, Moscow, Russia
A.V. Butenko, M.V. Lalayan, E. Syresin, G.V. Trubnikov
JINR, Dubna, Moscow Region, Russia
D. Bychanok, S.A. Maksimenko
INP BSU, Minsk, Belarus
V.S. Petrakovsky, I.L. Pobol, A.I. Pokrovsky, A. Shvedov, S.V. Yurevich, V.G. Zaleski
Physical-Technical Institute of the National Academy of Sciences of Belarus, Minsk, Belarus
G.V. Trubnikov
JINR/VBLHEP, Dubna, Moscow region, Russia

Since 2015 the superconducting (SC) linac-injector development for Nuclotron NICA (JINR, Dubna, Russia) is carried out by the collaboration of JINR, NRNU MEPhI, INP BSU, PTI NASB. This new SC linac is to accelerate protons up to 20 MeV and light ions to 7.5 MeV/u with possible energy upgrade up to 50 MeV for proton beam. This paper reports the current status of the development and manufacturing of superconducting accelerating cavities for a new linear accelerator of the injection complex of the Nuclotron-NICA project.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-THA01

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Received ※ 26 September 2021 — Revised ※ 27 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 24 October 2021

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FRB04

A Linear Accelerator for Proton Therapy

proton, acceleration, operation, focusing

117

V.V. Paramonov, A.P. Durkin, A. Kolomiets
RAS/INR, Moscow, Russia

For applications in proton therapy, linear accelerators can provide beam performances not achievable with cyclic facilities. The results of the development of a proposal for a linac with the maximal proton energy of 230 MeV are presented. Operating in a pulsed mode, with a repetition rate not less than 50 Hz, the linac is designed to accelerate up to 10¹³ protons per irradiation cycle lasting from 10 to 200 seconds. Possibilities of fast, from pulse to pulse, adjustment of the output energy in the range from 60 MeV to 230 MeV, formation and acceleration to the output energy of a "pencil-like" beam with a diameter of ~ 2 mm are shown. Optimized solutions, proposed for both the accelerating-focusing channel and the technical systems of the linac make it possible to create a facility with high both target and technical and economic features. Special attention, due to the selection of proven in long-term operation parameters of the systems, is paid to ensuring the reliability of the linac operation. The feasibility of linac is substantiated on the basis of mastered or modified with a guarantee industrial equipment.

Slides FRB04 [5.370 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB04

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Received ※ 16 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021

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