RuPAC2021 - List of Keywords (detector)

Paper	Title	Other Keywords	Page
MOX02	Development and Implementation of Bunch Shape Instrumentation for Ion Linacs	electron, linac, target, 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)

MOPSA29	Applied Research Stations and New Beam Transfer Lines at the NICA Accelerator Complex	diagnostics, radiation, electron, 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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MOPSA39	Application of a Scintillation Detector for Periodic Monitoring of Beam Parameters at Medical Proton Therapy Complex "Prometheus"	proton, radiation, extraction, synchrotron	176
	A.E. Shemyakov, Belikhin, M.A. Belikhin, A.A. Pryanichnikov, A.I. Shestopalov PhTC LPI RAS, Protein, Moscow region, Russia Belikhin, M.A. Belikhin, A.A. Pryanichnikov MSU, Moscow, Russia
	Introduction: In November 2015 the first domestic complex of proton therapy "Prometheus" start to treat oncology patients. This complex uses a modern technique for irradiation of tumors by scanning with a pencil beam. This technique requires continuous monitoring and regular verification of main beam parameters such as range in water, focusing and lateral dimension. To control these parameters, we developed a waterproof detector for measurements in air and in a water phantom. Methods and materials: The detector system consists of a luminescent screen 5 cm in diameter, a mirror and a CCD camera. When the beam goes through the screen, a glow appears, the reflected image of which is perceived by the camera and analyzed. This design is waterproof, which makes it possible to perform measurements in water. To measure the range of protons in water, this detector was fixed on a special positioner, which allows to move the sensor with an accuracy of 0.2 mm. We measured the beams also in comparison with EBT3 dosimetric film for energies from 60 to 250 MeV with a step of 10 MeV. Same measurements of the ranges were carried out using a standard PTW Bragg Peak ionization chamber. Results: It was shown that this system is a simple and inexpensive tool for conducting regular quality assurance of beam parameters. Unlike the EBT3 dosimetric film, this detector gives an immediate response, which makes it possible to use it when debugging the accelerator and adjusting the beam.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA39
About •	Received ※ 17 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021
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MOPSA47	Verification of a Beam of Epithermal Neutrons for Boron-Neutron Capture Therapy	neutron, radiation, proton, experiment	199
	G.D. Verkhovod Budker INP & NSU, Novosibirsk, Russia D.A. Kasatov, Ia.A. Kolesnikov, S.Yu. Taskaev NSU, Novosibirsk, Russia D.A. Kasatov, Ia.A. Kolesnikov, A.N. Makarov, S. Savinov, I.M. Shchudlo, T. Sycheva, S.Yu. Taskaev BINP SB RAS, Novosibirsk, Russia S. Savinov BINP & NSTU, Novosibirsk, Russia
	Funding: The research was supported by Russian Science Foundation, grant No. 19-72-30005. At Budker Institute of Nuclear Physics it was proposed and developed a source of epithermal neutrons based on a tandem accelerator with vacuum insulation and a lithium target for the development of boron neutron capture therapy, a promising method for treating malignant tumors. To measure the "boron" dose due to the boron-lithium reaction, a small-sized detector has been developed. It consists of two polystyrene scintillators, one of which is enriched with boron. Using the detector, the spatial distribution of boron dose and dose of gamma radiation in a 330x330x315 mm water phantom was measured and the results obtained were compared with the results of numerical simulation of the absorbed dose components in such a tissue-equivalent phantom. It is shown that the results obtained are in good agreement with the calculated ones. It was found that the use of a 72 mm Plexiglas moderator provides an acceptable quality of the neutron beam for in vitro and in vivo studies, namely: 1 mA 2.05 MeV proton beam on a lithium target provides a dose rate of 30 Gy-Eq/h in cells containing boron at a concentration of 40 ppm, and 6 Gy-Eq/h in cells without boron. The developed technique for on-line measurement of boron dose and dose of gamma radiation makes it possible to carry out a similar verification of a neutron beam prepared for clinical trials of BNCT after placing a neutron beam shaping assembly with a magnesium fluoride moderator in a bunker adjacent to the accelerator.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA47
About •	Received ※ 27 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 22 October 2021
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MOPSA55	Beam-induced Background Simulations for the CMS Experiment at the LHC	simulation, experiment, background, radiation	225
	I.L. Azhgirey, I.S. Bayshev, I.A. Kurochkin, A.D. Riabchikova IHEP, Moscow Region, Russia A.E. Dabrowski CERN, Geneva, Switzerland S. Mallows KIT, Karlsruhe, Germany
	Beam-induced background comes from interactions of the beam and beam halo particles with either the residual gas in the vacuum chamber of accelerator or the collimators that define the beam aperture. Beam-induced processes can potentially be a significant source of background for physics analyses at the LHC. This contribution describes the simulation software environment used for this part of the CMS experiment activity and recent beam-induced background simulation results for the Phase-2 CMS operation design.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA55
About •	Received ※ 14 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 14 October 2021
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TUY01	VEPP-2000 Collider Complex Operation in 2019-2021 Runs	luminosity, collider, operation, vacuum	28
	M.V. Timoshenko, Yu. Aktershev, O.V. Belikov, D.E. Berkaev, D.B. Burenkov, V.P. Druzhinin, K. Gorchakov, G.V. Karpov, A.S. Kasaev, A.N. Kirpotin, S.A. Kladov, I. Koop, A.V. Kupurzhanov, G.Y. Kurkin, M.A. Lyalin, A.P. Lysenko, S.V. Motygin, A.V. Otboev, A.V. Pavlenko, E. Perevedentsev, V.P. Prosvetov, Yu.A. Rogovsky, A.M. Semenov, A.I. Senchenko, L.E. Serdakov, P.Yu. Shatunov, Y.M. Shatunov, D.B. Shwartz, V.D. Yudin, I.M. Zemlyansky, Yu.M. Zharinov BINP SB RAS, Novosibirsk, Russia S.A. Kladov, I. Koop, M.A. Lyalin, A.V. Pavlenko, E. Perevedentsev, Yu.A. Rogovsky, A.I. Senchenko, P.Yu. Shatunov, Y.M. Shatunov, D.B. Shwartz NSU, Novosibirsk, Russia Yu.A. Rogovsky Budker INP & NSU, Novosibirsk, Russia A.M. Semenov BINP & NSTU, Novosibirsk, Russia
	VEPP-2000 is the only electron-positron collider operating with a round beam permitting to increase the limit of beam-beam effects. VEPP-2000 is the compact collider with 24.4 m-circumference which has record luminosity at energy up to 1 GeV per bunch (1032 1/cm²s), magnetic fields in superconducting solenoids (13 T) and in the bending magnets (2.4 T). Collider complex experimental program of 2019-2021 was focused on several energy ranges per bunch. Energy range in the second half of 2019 was 180-300 MeV, in the first half of 2020 ¿ 935-970 MeV, in the first half of 2021 - 970-1003.5 MeV. Data taking was carried out by CMD-3 and SND detectors and operation efficiency is compared with previous runs. Luminosity was limited by beam-beam effects. 2021 year was clouded by vacuum accident and subsequent intensive degassing using beam synchrotron radiation.
	Slides TUY01 [2.449 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUY01
About •	Received ※ 11 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 23 October 2021
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TUPSB11	Numerical Investigation of the Robustness of Spin-Navigator Polarization Control Method in a Spin-Transparent Storage Ring	polarization, solenoid, lattice, controls	254
	A.A. Melnikov, A.E. Aksentyev, V. Senichev RAS/INR, Moscow, Russia A.E. Aksentyev MEPhI, Moscow, Russia V. Ladygin JINR, Dubna, Moscow Region, Russia
	The robustness of spin-navigator based method for manipulating the beam polarization axis has been investigated with respect to bend magnet installation errors. Toward that end, variation of the invariant spin axis components along the beamline of an imperfect storage ring operating in the spin-transparent mode has been estimated. The beam polarization vector behavior in the given lattice has been investigated. Conclusions are made regarding the feasibility of using spin navigator solenoids for defining the beam polarization axis in the detector region.
	Poster TUPSB11 [0.536 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB11
About •	Received ※ 12 September 2021 — Revised ※ 13 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 11 October 2021
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TUPSB51	Measurement of Neutron Field Functionals Around a Neutron Converter of 50 GeV Protons	neutron, proton, experiment, hadron	330
	Ja.N. Rascvetalov, Yu.V. Beletskaya, A.G. Denisov, A.A. Durum, V.L. Ilukin, A. Mamaev, V.N. Peleshko, I.N. Piryazev, E.N. Savitskaya, M.M. Sukharev, S.E. Sukhikh, A.A. Yanovich IHEP, Moscow Region, Russia
	The experiment was performed on a pulsed neutron source of the "Neutron" research bench, being created at the U-70 accelerator at National Research Center "Kurchatov Institute" - IHEP, Protvino. Neutrons were generated by the 50 GeV proton beam in the special converter. As a measurement method, neutron activation analysis was used with a set of threshold activation detectors made of C, Al, Nb, In, Bi materials. The neutron energy thresholds of these detectors are in the range from 1 MeV to 75 MeV. The aluminium activation foils were used to calculate the absolute values of the proton quantities in the exposures. The results of measurements and calculations are presented in the form of the following functionals: nuclides activity of threshold reactions in detectors at the end of the exposure; reaction rate; neutron fluences with energies greater than the threshold. To estimate these values, the spectra of neutrons, protons and pions were calculated using the particle transport codes MARS and HADRON with the FAN15 as a low-energy block. It was found that neutrons dominate up to 100 MeV, and the charged hadrons contribution to the total reaction rate for a particular nuclide formation can range from 4% to 46%.
	Poster TUPSB51 [1.129 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB51
About •	Received ※ 15 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 04 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	electron, 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 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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WEPSC34	Treatment of the Results Measurement of Profile Beam Using Wire Scanners at Accelerator U-70 IHEP	proton, feedback, betatron, operation	410
	D.A. Vasiliev, V.T. Baranov, V.A. Kalinin, O.P. Lebedev, A. Lutchev, D.A. Savin IHEP, Moscow Region, Russia
	The IHEP has developed fast wire scanners based on servomotors with a scanning speed of V = 16m/s. For processing of analog signals from detectors, a digital USB oscilloscope NI USB-5133 manufactured by National Instruments has been chosen. The paper describes methods of data processing from a wire scanner using a program developed in the LabVIEW environment and obtaining information about beam parameters as well. To determine the frequency of beam revolution, a fast Fourier transform is used. The measured input signal is integrated at a chosed number of turns of the beam. The amplitude, center position, offset, rms deviation of the resulting distribution and beam sizes at the corresponding energy level are calculated using the Gaussian Peak Fit VI library element. The data of beam profile in different modes of accelerator operation are presented.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC34
About •	Received ※ 06 September 2021 — Revised ※ 07 September 2021 — Accepted ※ 13 September 2021 — Issued ※ 28 September 2021
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WEPSC36	Simulation of the Coherent Radiation Interferometry for the Beam Temporal Structure Diagnostics	radiation, simulation, electron, 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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WEPSC40	Detection of Anomalies in BPM Signals at the VEPP-4M	ISOL, experiment, optics, simulation	420
	I.A. Morozov, P.A. Piminov BINP SB RAS, Novosibirsk, Russia
	Beam position monitors (BPMs) are widely used for beam diagnostics in particle accelerators. Turn-by-turn (TbT) beam centroid data provide a means to estimate performance-critical accelerator parameters, like betatron frequency and optical functions. Parameter estimation accuracy is heavily related to TbT data quality. BPM faults might lead to erroneous estimation of accelerator parameters and should be accounted for achieving accurate and reliable results. Several anomaly detection methods for TbT data cleaning are considered. Derived features of BPM signals along with their robust dispersion estimation are used to flag faulty BPM signals. Estimated contamination factor is used with unsupervised learning methods (Local Outlier Factor and Isolation Forest). Application of anomaly detection methods for the VEPP-4M experimental TbT data is reported.
	Poster WEPSC40 [2.681 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC40
About •	Received ※ 05 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 21 September 2021
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WEPSC42	RF Cavity Based Charge Detector for a Low Charge Ultra Sort Singe Electron Bunch Measurement	electron, 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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WEPSC51	Concept of Decision Support System for INR RAS Linac Beam Tuning	linac, software, factory, 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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WEPSC57	System of on-Line Energy Control of Electron Beam for Accelerator	electron, monitoring, controls, 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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Paper

Title

Other Keywords

Page

MOX02

Development and Implementation of Bunch Shape Instrumentation for Ion Linacs

electron, linac, target, 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)

MOPSA29

Applied Research Stations and New Beam Transfer Lines at the NICA Accelerator Complex

diagnostics, radiation, electron, 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

Cite •

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

MOPSA39

Application of a Scintillation Detector for Periodic Monitoring of Beam Parameters at Medical Proton Therapy Complex "Prometheus"

proton, radiation, extraction, synchrotron

176

A.E. Shemyakov, Belikhin, M.A. Belikhin, A.A. Pryanichnikov, A.I. Shestopalov
PhTC LPI RAS, Protein, Moscow region, Russia
Belikhin, M.A. Belikhin, A.A. Pryanichnikov
MSU, Moscow, Russia

Introduction: In November 2015 the first domestic complex of proton therapy "Prometheus" start to treat oncology patients. This complex uses a modern technique for irradiation of tumors by scanning with a pencil beam. This technique requires continuous monitoring and regular verification of main beam parameters such as range in water, focusing and lateral dimension. To control these parameters, we developed a waterproof detector for measurements in air and in a water phantom. Methods and materials: The detector system consists of a luminescent screen 5 cm in diameter, a mirror and a CCD camera. When the beam goes through the screen, a glow appears, the reflected image of which is perceived by the camera and analyzed. This design is waterproof, which makes it possible to perform measurements in water. To measure the range of protons in water, this detector was fixed on a special positioner, which allows to move the sensor with an accuracy of 0.2 mm. We measured the beams also in comparison with EBT3 dosimetric film for energies from 60 to 250 MeV with a step of 10 MeV. Same measurements of the ranges were carried out using a standard PTW Bragg Peak ionization chamber. Results: It was shown that this system is a simple and inexpensive tool for conducting regular quality assurance of beam parameters. Unlike the EBT3 dosimetric film, this detector gives an immediate response, which makes it possible to use it when debugging the accelerator and adjusting the beam.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA39

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Received ※ 17 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021

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MOPSA47

Verification of a Beam of Epithermal Neutrons for Boron-Neutron Capture Therapy

neutron, radiation, proton, experiment

199

G.D. Verkhovod
Budker INP & NSU, Novosibirsk, Russia
D.A. Kasatov, Ia.A. Kolesnikov, S.Yu. Taskaev
NSU, Novosibirsk, Russia
D.A. Kasatov, Ia.A. Kolesnikov, A.N. Makarov, S. Savinov, I.M. Shchudlo, T. Sycheva, S.Yu. Taskaev
BINP SB RAS, Novosibirsk, Russia
S. Savinov
BINP & NSTU, Novosibirsk, Russia

Funding: The research was supported by Russian Science Foundation, grant No. 19-72-30005.
At Budker Institute of Nuclear Physics it was proposed and developed a source of epithermal neutrons based on a tandem accelerator with vacuum insulation and a lithium target for the development of boron neutron capture therapy, a promising method for treating malignant tumors. To measure the "boron" dose due to the boron-lithium reaction, a small-sized detector has been developed. It consists of two polystyrene scintillators, one of which is enriched with boron. Using the detector, the spatial distribution of boron dose and dose of gamma radiation in a 330x330x315 mm water phantom was measured and the results obtained were compared with the results of numerical simulation of the absorbed dose components in such a tissue-equivalent phantom. It is shown that the results obtained are in good agreement with the calculated ones. It was found that the use of a 72 mm Plexiglas moderator provides an acceptable quality of the neutron beam for in vitro and in vivo studies, namely: 1 mA 2.05 MeV proton beam on a lithium target provides a dose rate of 30 Gy-Eq/h in cells containing boron at a concentration of 40 ppm, and 6 Gy-Eq/h in cells without boron. The developed technique for on-line measurement of boron dose and dose of gamma radiation makes it possible to carry out a similar verification of a neutron beam prepared for clinical trials of BNCT after placing a neutron beam shaping assembly with a magnesium fluoride moderator in a bunker adjacent to the accelerator.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA47

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Received ※ 27 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 22 October 2021

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MOPSA55

Beam-induced Background Simulations for the CMS Experiment at the LHC

simulation, experiment, background, radiation

225

I.L. Azhgirey, I.S. Bayshev, I.A. Kurochkin, A.D. Riabchikova
IHEP, Moscow Region, Russia
A.E. Dabrowski
CERN, Geneva, Switzerland
S. Mallows
KIT, Karlsruhe, Germany

Beam-induced background comes from interactions of the beam and beam halo particles with either the residual gas in the vacuum chamber of accelerator or the collimators that define the beam aperture. Beam-induced processes can potentially be a significant source of background for physics analyses at the LHC. This contribution describes the simulation software environment used for this part of the CMS experiment activity and recent beam-induced background simulation results for the Phase-2 CMS operation design.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA55

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Received ※ 14 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 14 October 2021

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TUY01

VEPP-2000 Collider Complex Operation in 2019-2021 Runs

luminosity, collider, operation, vacuum

28

M.V. Timoshenko, Yu. Aktershev, O.V. Belikov, D.E. Berkaev, D.B. Burenkov, V.P. Druzhinin, K. Gorchakov, G.V. Karpov, A.S. Kasaev, A.N. Kirpotin, S.A. Kladov, I. Koop, A.V. Kupurzhanov, G.Y. Kurkin, M.A. Lyalin, A.P. Lysenko, S.V. Motygin, A.V. Otboev, A.V. Pavlenko, E. Perevedentsev, V.P. Prosvetov, Yu.A. Rogovsky, A.M. Semenov, A.I. Senchenko, L.E. Serdakov, P.Yu. Shatunov, Y.M. Shatunov, D.B. Shwartz, V.D. Yudin, I.M. Zemlyansky, Yu.M. Zharinov
BINP SB RAS, Novosibirsk, Russia
S.A. Kladov, I. Koop, M.A. Lyalin, A.V. Pavlenko, E. Perevedentsev, Yu.A. Rogovsky, A.I. Senchenko, P.Yu. Shatunov, Y.M. Shatunov, D.B. Shwartz
NSU, Novosibirsk, Russia
Yu.A. Rogovsky
Budker INP & NSU, Novosibirsk, Russia
A.M. Semenov
BINP & NSTU, Novosibirsk, Russia

VEPP-2000 is the only electron-positron collider operating with a round beam permitting to increase the limit of beam-beam effects. VEPP-2000 is the compact collider with 24.4 m-circumference which has record luminosity at energy up to 1 GeV per bunch (1032 1/cm²s), magnetic fields in superconducting solenoids (13 T) and in the bending magnets (2.4 T). Collider complex experimental program of 2019-2021 was focused on several energy ranges per bunch. Energy range in the second half of 2019 was 180-300 MeV, in the first half of 2020 ¿ 935-970 MeV, in the first half of 2021 - 970-1003.5 MeV. Data taking was carried out by CMD-3 and SND detectors and operation efficiency is compared with previous runs. Luminosity was limited by beam-beam effects. 2021 year was clouded by vacuum accident and subsequent intensive degassing using beam synchrotron radiation.

Slides TUY01 [2.449 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUY01

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Received ※ 11 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 23 October 2021

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TUPSB11

Numerical Investigation of the Robustness of Spin-Navigator Polarization Control Method in a Spin-Transparent Storage Ring

polarization, solenoid, lattice, controls

254

A.A. Melnikov, A.E. Aksentyev, V. Senichev
RAS/INR, Moscow, Russia
A.E. Aksentyev
MEPhI, Moscow, Russia
V. Ladygin
JINR, Dubna, Moscow Region, Russia

The robustness of spin-navigator based method for manipulating the beam polarization axis has been investigated with respect to bend magnet installation errors. Toward that end, variation of the invariant spin axis components along the beamline of an imperfect storage ring operating in the spin-transparent mode has been estimated. The beam polarization vector behavior in the given lattice has been investigated. Conclusions are made regarding the feasibility of using spin navigator solenoids for defining the beam polarization axis in the detector region.

Poster TUPSB11 [0.536 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB11

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Received ※ 12 September 2021 — Revised ※ 13 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 11 October 2021

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TUPSB51

Measurement of Neutron Field Functionals Around a Neutron Converter of 50 GeV Protons

neutron, proton, experiment, hadron

330

Ja.N. Rascvetalov, Yu.V. Beletskaya, A.G. Denisov, A.A. Durum, V.L. Ilukin, A. Mamaev, V.N. Peleshko, I.N. Piryazev, E.N. Savitskaya, M.M. Sukharev, S.E. Sukhikh, A.A. Yanovich
IHEP, Moscow Region, Russia

The experiment was performed on a pulsed neutron source of the "Neutron" research bench, being created at the U-70 accelerator at National Research Center "Kurchatov Institute" - IHEP, Protvino. Neutrons were generated by the 50 GeV proton beam in the special converter. As a measurement method, neutron activation analysis was used with a set of threshold activation detectors made of C, Al, Nb, In, Bi materials. The neutron energy thresholds of these detectors are in the range from 1 MeV to 75 MeV. The aluminium activation foils were used to calculate the absolute values of the proton quantities in the exposures. The results of measurements and calculations are presented in the form of the following functionals: nuclides activity of threshold reactions in detectors at the end of the exposure; reaction rate; neutron fluences with energies greater than the threshold. To estimate these values, the spectra of neutrons, protons and pions were calculated using the particle transport codes MARS and HADRON with the FAN15 as a low-energy block. It was found that neutrons dominate up to 100 MeV, and the charged hadrons contribution to the total reaction rate for a particular nuclide formation can range from 4% to 46%.

Poster TUPSB51 [1.129 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB51

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Received ※ 15 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 04 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

electron, 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 WED05 [5.105 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WED05

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Received ※ 05 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 12 October 2021

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WEPSC34

Treatment of the Results Measurement of Profile Beam Using Wire Scanners at Accelerator U-70 IHEP

proton, feedback, betatron, operation

410

D.A. Vasiliev, V.T. Baranov, V.A. Kalinin, O.P. Lebedev, A. Lutchev, D.A. Savin
IHEP, Moscow Region, Russia

The IHEP has developed fast wire scanners based on servomotors with a scanning speed of V = 16m/s. For processing of analog signals from detectors, a digital USB oscilloscope NI USB-5133 manufactured by National Instruments has been chosen. The paper describes methods of data processing from a wire scanner using a program developed in the LabVIEW environment and obtaining information about beam parameters as well. To determine the frequency of beam revolution, a fast Fourier transform is used. The measured input signal is integrated at a chosed number of turns of the beam. The amplitude, center position, offset, rms deviation of the resulting distribution and beam sizes at the corresponding energy level are calculated using the Gaussian Peak Fit VI library element. The data of beam profile in different modes of accelerator operation are presented.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC34

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Received ※ 06 September 2021 — Revised ※ 07 September 2021 — Accepted ※ 13 September 2021 — Issued ※ 28 September 2021

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WEPSC36

Simulation of the Coherent Radiation Interferometry for the Beam Temporal Structure Diagnostics

radiation, simulation, electron, 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.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC36

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Received ※ 24 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021

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WEPSC40

Detection of Anomalies in BPM Signals at the VEPP-4M

ISOL, experiment, optics, simulation

420

I.A. Morozov, P.A. Piminov
BINP SB RAS, Novosibirsk, Russia

Beam position monitors (BPMs) are widely used for beam diagnostics in particle accelerators. Turn-by-turn (TbT) beam centroid data provide a means to estimate performance-critical accelerator parameters, like betatron frequency and optical functions. Parameter estimation accuracy is heavily related to TbT data quality. BPM faults might lead to erroneous estimation of accelerator parameters and should be accounted for achieving accurate and reliable results. Several anomaly detection methods for TbT data cleaning are considered. Derived features of BPM signals along with their robust dispersion estimation are used to flag faulty BPM signals. Estimated contamination factor is used with unsupervised learning methods (Local Outlier Factor and Isolation Forest). Application of anomaly detection methods for the VEPP-4M experimental TbT data is reported.

Poster WEPSC40 [2.681 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC40

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Received ※ 05 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 21 September 2021

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WEPSC42

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

electron, 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

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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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WEPSC51

Concept of Decision Support System for INR RAS Linac Beam Tuning

linac, software, factory, 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]

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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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WEPSC57

System of on-Line Energy Control of Electron Beam for Accelerator

electron, monitoring, controls, 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.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC57

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Received ※ 27 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 22 October 2021

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