RuPAC2021 - List of Keywords (controls)

Paper	Title	Other Keywords	Page
MOPSA17	Automated System for Heating High-Vacuum Elements of Superconducting Synchrotrons of the NICA Complex	vacuum, synchrotron, booster, collider	168
	A.S. Sergeev, A.N. Svidetelev JINR, Dubna, Moscow Region, Russia A.V. Butenko JINR/VBLHEP, Dubna, Moscow region, Russia
	To obtain an ultrahigh vacuum, it is necessary to preliminarily degass the "warm" sections of the vacuum system of accelerators by prolonged heating to remove water vapor and molecules of other substances adsorbed on the inner surface of the walls of the vacuum chamber. The presented system allows you to heat products with a known unknown heat capacity and thermal conductivity. Some of the accelerators of the NICA complex are supplied without their own heating system and heating is carried out by specialists directly at the accelerator site.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA17
About •	Received ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 11 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUA02	Current Status of VEPP-5 Injection Complex	positron, injection, operation, electron	37
	Yu.I. Maltseva, A.V. Andrianov, K.V. Astrelina, V.V. Balakin, A.M. Barnyakov, A.M. Batrakov, O.V. Belikov, D.E. Berkaev, D. Bolkhovityanov, F.A. Emanov, A.R. Frolov, G.V. Karpov, A.S. Kasaev, A.A. Kondakov, N.Kh. Kot, E.S. Kotov, G.Y. Kurkin, R.M. Lapik, N.N. Lebedev, A.E. Levichev, A.Yu. Martynovsky, P.V. Martyshkin, S.V. Motygin, A.A. Murasev, V. Muslivets, D.A. Nikiforov, A.V. Pavlenko, A.M. Pilan, Yu.A. Rogovsky, S.L. Samoylov, A.G. Tribendis, S. Vasiliev, V.D. Yudin BINP SB RAS, Novosibirsk, Russia A.V. Andrianov, V.V. Balakin, F.A. Emanov, E.S. Kotov, A.E. Levichev, Yu.I. Maltseva, D.A. Nikiforov, A.V. Pavlenko, Yu.A. Rogovsky NSU, Novosibirsk, Russia A.G. Tribendis NSTU, Novosibirsk, Russia
	VEPP-5 Injection Complex (IC) supplies VEPP-2000 and VEPP-4 colliders at Budker Institute of Nuclear Physics (BINP, Russia) with high energy electron and positron beams. Since 2016 the IC has shown the ability to support operation of both colliders routinely with maximum positron storage rate of 1.7·10¹⁰ e+/s. Stable operation at the energy of 430 MeV has been reached. Research on further improvements on the IC performance is carried out. In particular control system was improved, additional beam diagnostics systems were developed, monitoring of RF system was upgraded. In this paper, the latest achieved IC performance, operational results and prospects are presented.
	Slides TUA02 [2.966 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUA02
About •	Received ※ 28 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 11 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUC01	Status of the Kurchatov Synchrotron Radiation Source	wiggler, vacuum, electron, synchrotron	55
	A.G. Valentinov, A. Belkov, Ye. Fomin, E.V. Kaportsev, V. Korchuganov, Y.V. Krylov, V.I. Moiseev, K. Moseev, N.I. Moseiko, D.G. Odintsov, S.G. Pesterev, A.S. Smygacheva, A.I. Stirin, V.A. Ushakov NRC, Moscow, Russia
	The Kurchatov synchrotron radiation source goes on to operate in the range of synchrotron radiation from VUV up to hard X-ray. An electron current achieves 150 mA at 2.5 GeV, up to 12 experimental stations may function simultaneously. Improvement of the facility according Federal Program of KSRS modernization is in progress. Two 3 Tesla superconducting wigglers have been installed at main ring at 2019. They were tested with small electron beam current at 2020-2021. Wigglers’ influence on beam parameters is much closed to calculated value. Vacuum system has been upgraded at 2020. In 2021 control system will be completely modified. Manufactoring of third 181 MHz RF generator, new preliminary amplification cascades and new waveguides for all three generators continues in Budker Institute (Novosibirsk). Preparation of great modernization of the whole facility according Federal Program for science infrastructure development has been started.
	Slides TUC01 [17.060 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUC01
About •	Received ※ 24 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 09 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB11	Numerical Investigation of the Robustness of Spin-Navigator Polarization Control Method in a Spin-Transparent Storage Ring	polarization, detector, solenoid, lattice	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
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB13	Charged Particle Dynamics Optimization in Discrete Systems	dynamic-aperture, collider, factory, simulation	259
	E.D. Kotina, D.A. Ovsyannikov Saint Petersburg State University, Saint Petersburg, Russia
	Discrete optimization methods of dynamic systems are widely presented in the scientific literature. However, to solve various problems of beam dynamics optimization, it is necessary to create special optimization models that would take into account the specifics of the problems under study. The paper proposes a new mathematical model that includes the joint optimization of a selected (calculated) motion and an ensemble of perturbed motions. Functionals of a general form are considered, which makes it possible to estimate various characteristics of a charged particle beam and the dynamics of the calculated trajectory. The optimization of a bundle of smooth and nonsmooth functionals is investigated. These functionals estimate both the integral characteristics of the beam as a whole and various maximum deviations of the parameters of the particle beam. The variation of a bundle of functionals is given in an analytical form, which allows us to construct directed optimization methods. The selected trajectory can be taken, for example, as the trajectory of a synchronous particle or the center of gravity of a beam (closed orbit). We come to discrete models when we consider the dynamics of particles using a transfer matrices or transfer maps. Optimization problems can be of orbit correction, dynamic aperture optimization, and many other optimization problems in both cyclic and linear accelerators of charged particle beams.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB13
About •	Received ※ 16 September 2021 — Revised ※ 18 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 22 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEB02	Magnetic Field Measurements for the NICA Collider Magnets and FAIR Quadrupole Units	quadrupole, dipole, collider, multipole	71
	A.V. Shemchuk, I.I. Donguzov, D. Khramov, S.A. Kostromin, A.V. Kudashkin, T. Parfylo, M.M. Shandov, D.A. Zolotykh, E.V. Zolotykh JINR/VBLHEP, Dubna, Moscow region, Russia V.V. Borisov, O. Golubitsky, H.G. Khodzhibagiyan, B.Yu. Kondratiev, D. Nikiforov JINR, Dubna, Moscow Region, Russia
	The magnetic system of the NICA collider includes 86 quadrupole and 80 dipole superconducting magnets. The serial production and testing of the dipole magnets was completed in the summer of 2021. The tests of the quadrupole magnets of the collider and the quadrupole units of the FAIR project have successfully entered the phase of serial assembly and testing at the Joint Institute for Nuclear Research (VBLHEP JINR). One of the important testing tasks is to measure the characteristics of the magnetic field of magnets. The article describes the state of magnetic measurements and the main results of magnetic measurements of NICA collider magnets, quadrupole units of the FAIR project, as well as plans for measuring the following types of magnets of the NICA project.
	Slides WEB02 [18.282 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEB02
About •	Received ※ 05 October 2021 — Revised ※ 09 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 15 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC14	Booster RF System First Beam Tests	booster, acceleration, cavity, injection	370
	A.Yu. Grebentsov, O.I. Brovko, A.V. Butenko, V.A. Gerklotts, A.M. Malyshev, V.D. Petrov, O.V. Prozorov, E. Syresin, A.A. Volodin JINR, Dubna, Moscow Region, Russia A.M. Batrakov, S.A. Krutikhin, G.Y. Kurkin, V.M. Petrov, A.M. Pilan, E. Rotov, A.G. Tribendis BINP SB RAS, Novosibirsk, Russia G.A. Fatkin NSU, Novosibirsk, Russia
	The project NICA is being constructed in JINR, to provide collisions of heavy ion beams in the energy range from 1 to 4.5 GeV/u at the luminosity level of 1·1027 cm^-2·s⁻¹. A key element in the collider injection chain is the Booster a cycling accelerator of ions 197Au³¹⁺. The injection energy of particles is 3.2 MeV/u, extraction energy is 600MeV/u. Two Booster RF stations provide 10 kV of acceleration voltage. The frequency range from 587 kHz to 2526 kHz at the operation of the stations in the injector chain. The RF stations were fabricated in the Budker Institute of Nuclear Physics. The main design features and parameters of the first beam tests of the Booster RF system are discussed in this paper.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC14
About •	Received ※ 17 September 2021 — Revised ※ 27 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC39	Data Collection, Archiving and Monitoring System for U70 Synchrotron	database, monitoring, synchrotron, interface	417
	N.A. Oreshkova, V.A. Kalinin IHEP, Moscow Region, Russia
	This paper describes a data collection, archiving and monitoring system for U70 synchrotron. The system is designed to monitor the operation of the U-70 accelerator and is responsible for the collection of low-frequency (less than 2 kHz) analog signals from the U-70 technological systems, their processing and subsequent sending to the database using the Data Socket technology. The developed complex block diagram is presented. The hardware and its characteristics (number of channels, resolution, bandwidth) and the interface and functionality of the software are described. The results of using this system at the U-70 accelerator complex are presented.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC39
About •	Received ※ 09 September 2021 — Revised ※ 23 September 2021 — Accepted ※ 24 September 2021 — Issued ※ 11 October 2021
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WEPSC55	Development of the Low Intensity Extraction Beam Control System at Protom Synchrotron for Proton Radiography Implementation	proton, extraction, synchrotron, experiment	439
	A.A. Pryanichnikov, Belikhin, M.A. Belikhin, A.E. Shemyakov, P.B. Zhogolev PhTC LPI RAS, Protvino, Russia Belikhin, M.A. Belikhin, A.A. Pryanichnikov, A.E. Shemyakov, P.B. Zhogolev Protom Ltd., Protvino, Russia Belikhin, M.A. Belikhin, A.P. Chernyaev, A.A. Pryanichnikov MSU, Moscow, Russia V. Rykalin ProtonVDA, Naperville, Illinois, USA
	Currently, the calculation of the proton range in patients receiving proton therapy is based on the conversion of Hounsfield CT units of the patient’s tissues into the relative stopping power of protons. Proton radiography is able to reduce these uncertainties by directly measuring proton stopping power. However, proton imaging systems cannot handle the proton beam intensities used in standard proton therapy. This means that for implementation of proton radiography it is necessary to reduce the intensity of the protons significantly. This study demonstrates the current version of the new beam control system for low proton intensity extraction. The system is based on automatic removable unit with special luminescence film and sensitive photoreceptor. Using of the removable module allows us to save initial parameters of the therapy beam. Remote automatic control of this unit will provide switch therapy and imaging modes between synchrotron cycles. The work describes algorithms of low flux beam control, calibration procedures and experimental measurements. Measurements and calibration procedures were performed with certified Protom Faraday Cup, PTW Bragg Peak Chamber and specially designed experimental external detector. The development can be implemented in any proton therapy complexes based on the Protom synchrotron. This allow us to use initial synchrotron beam as a tool for patient verification and to eliminate proton range uncertainties.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC55
About •	Received ※ 17 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 04 October 2021
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WEPSC57	System of on-Line Energy Control of Electron Beam for Accelerator	electron, monitoring, detector, radiation	446
	N.N. Kurapov, Ya.V. Bodryashkin, A.S. Cherkasov, I.V. Shorikov RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia A.V. Telnov VNIIEF, Sarov, Russia
	There arises a need for measuring the output electron energy in the on-line mode during set-up, adjustment or operation of an accelerator. For this purpose a system is developed, allowing an on-line control of an accelerated electron energy spectrum simultaneously with average current measurement. This system is meant for reconstruction of the energy spectrum of accelerated electrons in the energy range from 1 up to 10 MeV at the average beam current from 20 up to 150 µA. The system is based on the method of absorbing filters and consists of an assembly, absorbing an accelerated electron beam, and a measuring system. The absorption assembly represents a set of insulated from each other electro-conducting plates of dimension 100x100 mm and thickness from 0.15 up to 1 mm with an air gap between plates 2 mm. The operation involves development, manufacture and calculation of electron beam transmission through the absorption assembly, development and manufacture of hardware for automated measuring of absorbed charges in the assembly elements, development of a master computer program as well as a program of energy spectrum reconstruction, using measured and calculated data, testing of the energy on-line control system on the LU-10-20 linear resonance electron accelerator. Tests of the developed sample on the electron accelerator have proved the applicability of the system to control the electron beam energy in the real-time mode.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC57
About •	Received ※ 27 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 22 October 2021
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FRA04	The Experimental Research of Cyclotron DC-280 Beam Parameters	cyclotron, experiment, diagnostics, electron	102
	V.A. Semin, K. Gikal, I.V. Kalagin, N.Yu. Kazarinov, V.I. Mironov, S.V. Mitrofanov, Yu.G. Teterev JINR, Dubna, Moscow Region, Russia A. Issatov, L.A. Pavlov, A.A. Protasov JINR/FLNR, Moscow region, Russia
	The DC-280 is the high intensity cyclotron for Super Heavy Elements Factory in FLNR JINR. It was designed for production of accelerated ions beam with intensity up 10 pµA to energy in range 4 - 8 MeV/n. The beam power is up 3,5 kW. The diagnostics elements shall be capable of withstanding this power. Moreover such intensity beam required continuous control for avoid of equipment damage. Special diagnostic equipment were designed, manufactured and commissioning. During the design the calculation of thermal loads was made. Some of them were tested before installation on cyclotron. Diagnostic elements used on DC-280 cyclotron are described in this paper. The special Faraday cup was designed for beam cur-rent measurement. The moving inner probe and multylamellar probe are inside the cyclotron. The Scanning two-dimension ionization profile monitor was produced for space distribution analysis of accelerated high intensity beam. Inner Pickup electrode system with special elec-tronic was created for beam phase moving analysis. Time of flight system based on two pick-up electrodes for energy measured was placed in transport channel. These and over diagnostic system were commissioned and tested. The results present in report.
	Slides FRA04 [16.527 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRA04
About •	Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 13 October 2021 — Issued ※ 22 October 2021
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FRA05	Cyclotron System C-250	proton, cyclotron, resonance, radiation	105
	K.E. Smirnov, A.V. Galchuck, Yu.N. Gavrish, S.V. Grigorenko, V.I. Grigoriev, R.M. Klopenkov, L.E. Korolev, K.A. Kravchuk, A.N. Kuzhlev, I.I. Mezhov, V.G. Mudrolyubov, Yu.K. Osina, Yu.I. Stogov, M.V. Usanova NIIEFA, St. Petersburg, Russia
	JSC "NIIEFA" is designing a cyclotron system that gen-erates intensive proton beams with final energy in the range of 30-250 MeV. We have adopted a non-standard technical solution: at the energy of less than 125 MeV negative hydrogen ions are accelerated with the extrac-tion of protons by the stripping device; at higher energies protons are accelerated, and the beam is extracted by a deflector and a magnetic channel. The isochronous de-pendence of the magnetic field on the radius for different final energies is provided by changing the current in the main coil and tuning the correction coils. The cyclotron electromagnet has an H-shaped design with a pole diameter of 4 meters, a four-sector magnetic structure, and high spirality sectors. The dees of the reso-nance system are formed by delta electrodes and placed in the opposite valleys; stems are brought outwards through holes in the valleys. The operating frequency range is 24-33.2 MHz. The power of the RF generator is 60 kW. The cyclotron complex is equipped with a branched beam transport system and target devices for applied re-search on the radiation resistance of materials. Computer control of the cyclotron and its associated systems is provided.
	Slides FRA05 [6.105 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRA05
About •	Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPSA17

Automated System for Heating High-Vacuum Elements of Superconducting Synchrotrons of the NICA Complex

vacuum, synchrotron, booster, collider

168

A.S. Sergeev, A.N. Svidetelev
JINR, Dubna, Moscow Region, Russia
A.V. Butenko
JINR/VBLHEP, Dubna, Moscow region, Russia

To obtain an ultrahigh vacuum, it is necessary to preliminarily degass the "warm" sections of the vacuum system of accelerators by prolonged heating to remove water vapor and molecules of other substances adsorbed on the inner surface of the walls of the vacuum chamber. The presented system allows you to heat products with a known unknown heat capacity and thermal conductivity. Some of the accelerators of the NICA complex are supplied without their own heating system and heating is carried out by specialists directly at the accelerator site.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA17

About •

Received ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 11 October 2021

Cite •

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

TUA02

Current Status of VEPP-5 Injection Complex

positron, injection, operation, electron

37

Yu.I. Maltseva, A.V. Andrianov, K.V. Astrelina, V.V. Balakin, A.M. Barnyakov, A.M. Batrakov, O.V. Belikov, D.E. Berkaev, D. Bolkhovityanov, F.A. Emanov, A.R. Frolov, G.V. Karpov, A.S. Kasaev, A.A. Kondakov, N.Kh. Kot, E.S. Kotov, G.Y. Kurkin, R.M. Lapik, N.N. Lebedev, A.E. Levichev, A.Yu. Martynovsky, P.V. Martyshkin, S.V. Motygin, A.A. Murasev, V. Muslivets, D.A. Nikiforov, A.V. Pavlenko, A.M. Pilan, Yu.A. Rogovsky, S.L. Samoylov, A.G. Tribendis, S. Vasiliev, V.D. Yudin
BINP SB RAS, Novosibirsk, Russia
A.V. Andrianov, V.V. Balakin, F.A. Emanov, E.S. Kotov, A.E. Levichev, Yu.I. Maltseva, D.A. Nikiforov, A.V. Pavlenko, Yu.A. Rogovsky
NSU, Novosibirsk, Russia
A.G. Tribendis
NSTU, Novosibirsk, Russia

VEPP-5 Injection Complex (IC) supplies VEPP-2000 and VEPP-4 colliders at Budker Institute of Nuclear Physics (BINP, Russia) with high energy electron and positron beams. Since 2016 the IC has shown the ability to support operation of both colliders routinely with maximum positron storage rate of 1.7·10¹⁰ e+/s. Stable operation at the energy of 430 MeV has been reached. Research on further improvements on the IC performance is carried out. In particular control system was improved, additional beam diagnostics systems were developed, monitoring of RF system was upgraded. In this paper, the latest achieved IC performance, operational results and prospects are presented.

Slides TUA02 [2.966 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUA02

About •

Received ※ 28 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 11 October 2021

Cite •

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

TUC01

Status of the Kurchatov Synchrotron Radiation Source

wiggler, vacuum, electron, synchrotron

55

A.G. Valentinov, A. Belkov, Ye. Fomin, E.V. Kaportsev, V. Korchuganov, Y.V. Krylov, V.I. Moiseev, K. Moseev, N.I. Moseiko, D.G. Odintsov, S.G. Pesterev, A.S. Smygacheva, A.I. Stirin, V.A. Ushakov
NRC, Moscow, Russia

The Kurchatov synchrotron radiation source goes on to operate in the range of synchrotron radiation from VUV up to hard X-ray. An electron current achieves 150 mA at 2.5 GeV, up to 12 experimental stations may function simultaneously. Improvement of the facility according Federal Program of KSRS modernization is in progress. Two 3 Tesla superconducting wigglers have been installed at main ring at 2019. They were tested with small electron beam current at 2020-2021. Wigglers’ influence on beam parameters is much closed to calculated value. Vacuum system has been upgraded at 2020. In 2021 control system will be completely modified. Manufactoring of third 181 MHz RF generator, new preliminary amplification cascades and new waveguides for all three generators continues in Budker Institute (Novosibirsk). Preparation of great modernization of the whole facility according Federal Program for science infrastructure development has been started.

Slides TUC01 [17.060 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUC01

About •

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

Cite •

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

TUPSB11

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

polarization, detector, solenoid, lattice

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

Cite •

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

TUPSB13

Charged Particle Dynamics Optimization in Discrete Systems

dynamic-aperture, collider, factory, simulation

259

E.D. Kotina, D.A. Ovsyannikov
Saint Petersburg State University, Saint Petersburg, Russia

Discrete optimization methods of dynamic systems are widely presented in the scientific literature. However, to solve various problems of beam dynamics optimization, it is necessary to create special optimization models that would take into account the specifics of the problems under study. The paper proposes a new mathematical model that includes the joint optimization of a selected (calculated) motion and an ensemble of perturbed motions. Functionals of a general form are considered, which makes it possible to estimate various characteristics of a charged particle beam and the dynamics of the calculated trajectory. The optimization of a bundle of smooth and nonsmooth functionals is investigated. These functionals estimate both the integral characteristics of the beam as a whole and various maximum deviations of the parameters of the particle beam. The variation of a bundle of functionals is given in an analytical form, which allows us to construct directed optimization methods. The selected trajectory can be taken, for example, as the trajectory of a synchronous particle or the center of gravity of a beam (closed orbit). We come to discrete models when we consider the dynamics of particles using a transfer matrices or transfer maps. Optimization problems can be of orbit correction, dynamic aperture optimization, and many other optimization problems in both cyclic and linear accelerators of charged particle beams.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB13

About •

Received ※ 16 September 2021 — Revised ※ 18 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 22 October 2021

Cite •

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

WEB02

Magnetic Field Measurements for the NICA Collider Magnets and FAIR Quadrupole Units

quadrupole, dipole, collider, multipole

71

A.V. Shemchuk, I.I. Donguzov, D. Khramov, S.A. Kostromin, A.V. Kudashkin, T. Parfylo, M.M. Shandov, D.A. Zolotykh, E.V. Zolotykh
JINR/VBLHEP, Dubna, Moscow region, Russia
V.V. Borisov, O. Golubitsky, H.G. Khodzhibagiyan, B.Yu. Kondratiev, D. Nikiforov
JINR, Dubna, Moscow Region, Russia

The magnetic system of the NICA collider includes 86 quadrupole and 80 dipole superconducting magnets. The serial production and testing of the dipole magnets was completed in the summer of 2021. The tests of the quadrupole magnets of the collider and the quadrupole units of the FAIR project have successfully entered the phase of serial assembly and testing at the Joint Institute for Nuclear Research (VBLHEP JINR). One of the important testing tasks is to measure the characteristics of the magnetic field of magnets. The article describes the state of magnetic measurements and the main results of magnetic measurements of NICA collider magnets, quadrupole units of the FAIR project, as well as plans for measuring the following types of magnets of the NICA project.

Slides WEB02 [18.282 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEB02

About •

Received ※ 05 October 2021 — Revised ※ 09 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 15 October 2021

Cite •

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

WEPSC14

Booster RF System First Beam Tests

booster, acceleration, cavity, injection

370

A.Yu. Grebentsov, O.I. Brovko, A.V. Butenko, V.A. Gerklotts, A.M. Malyshev, V.D. Petrov, O.V. Prozorov, E. Syresin, A.A. Volodin
JINR, Dubna, Moscow Region, Russia
A.M. Batrakov, S.A. Krutikhin, G.Y. Kurkin, V.M. Petrov, A.M. Pilan, E. Rotov, A.G. Tribendis
BINP SB RAS, Novosibirsk, Russia
G.A. Fatkin
NSU, Novosibirsk, Russia

The project NICA is being constructed in JINR, to provide collisions of heavy ion beams in the energy range from 1 to 4.5 GeV/u at the luminosity level of 1·1027 cm^-2·s⁻¹. A key element in the collider injection chain is the Booster a cycling accelerator of ions 197Au³¹⁺. The injection energy of particles is 3.2 MeV/u, extraction energy is 600MeV/u. Two Booster RF stations provide 10 kV of acceleration voltage. The frequency range from 587 kHz to 2526 kHz at the operation of the stations in the injector chain. The RF stations were fabricated in the Budker Institute of Nuclear Physics. The main design features and parameters of the first beam tests of the Booster RF system are discussed in this paper.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC14

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Received ※ 17 September 2021 — Revised ※ 27 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021

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WEPSC39

Data Collection, Archiving and Monitoring System for U70 Synchrotron

database, monitoring, synchrotron, interface

417

N.A. Oreshkova, V.A. Kalinin
IHEP, Moscow Region, Russia

This paper describes a data collection, archiving and monitoring system for U70 synchrotron. The system is designed to monitor the operation of the U-70 accelerator and is responsible for the collection of low-frequency (less than 2 kHz) analog signals from the U-70 technological systems, their processing and subsequent sending to the database using the Data Socket technology. The developed complex block diagram is presented. The hardware and its characteristics (number of channels, resolution, bandwidth) and the interface and functionality of the software are described. The results of using this system at the U-70 accelerator complex are presented.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC39

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Received ※ 09 September 2021 — Revised ※ 23 September 2021 — Accepted ※ 24 September 2021 — Issued ※ 11 October 2021

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WEPSC55

Development of the Low Intensity Extraction Beam Control System at Protom Synchrotron for Proton Radiography Implementation

proton, extraction, synchrotron, experiment

439

A.A. Pryanichnikov, Belikhin, M.A. Belikhin, A.E. Shemyakov, P.B. Zhogolev
PhTC LPI RAS, Protvino, Russia
Belikhin, M.A. Belikhin, A.A. Pryanichnikov, A.E. Shemyakov, P.B. Zhogolev
Protom Ltd., Protvino, Russia
Belikhin, M.A. Belikhin, A.P. Chernyaev, A.A. Pryanichnikov
MSU, Moscow, Russia
V. Rykalin
ProtonVDA, Naperville, Illinois, USA

Currently, the calculation of the proton range in patients receiving proton therapy is based on the conversion of Hounsfield CT units of the patient’s tissues into the relative stopping power of protons. Proton radiography is able to reduce these uncertainties by directly measuring proton stopping power. However, proton imaging systems cannot handle the proton beam intensities used in standard proton therapy. This means that for implementation of proton radiography it is necessary to reduce the intensity of the protons significantly. This study demonstrates the current version of the new beam control system for low proton intensity extraction. The system is based on automatic removable unit with special luminescence film and sensitive photoreceptor. Using of the removable module allows us to save initial parameters of the therapy beam. Remote automatic control of this unit will provide switch therapy and imaging modes between synchrotron cycles. The work describes algorithms of low flux beam control, calibration procedures and experimental measurements. Measurements and calibration procedures were performed with certified Protom Faraday Cup, PTW Bragg Peak Chamber and specially designed experimental external detector. The development can be implemented in any proton therapy complexes based on the Protom synchrotron. This allow us to use initial synchrotron beam as a tool for patient verification and to eliminate proton range uncertainties.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC55

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Received ※ 17 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 04 October 2021

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WEPSC57

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

electron, monitoring, detector, radiation

446

N.N. Kurapov, Ya.V. Bodryashkin, A.S. Cherkasov, I.V. Shorikov
RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia
A.V. Telnov
VNIIEF, Sarov, Russia

There arises a need for measuring the output electron energy in the on-line mode during set-up, adjustment or operation of an accelerator. For this purpose a system is developed, allowing an on-line control of an accelerated electron energy spectrum simultaneously with average current measurement. This system is meant for reconstruction of the energy spectrum of accelerated electrons in the energy range from 1 up to 10 MeV at the average beam current from 20 up to 150 µA. The system is based on the method of absorbing filters and consists of an assembly, absorbing an accelerated electron beam, and a measuring system. The absorption assembly represents a set of insulated from each other electro-conducting plates of dimension 100x100 mm and thickness from 0.15 up to 1 mm with an air gap between plates 2 mm. The operation involves development, manufacture and calculation of electron beam transmission through the absorption assembly, development and manufacture of hardware for automated measuring of absorbed charges in the assembly elements, development of a master computer program as well as a program of energy spectrum reconstruction, using measured and calculated data, testing of the energy on-line control system on the LU-10-20 linear resonance electron accelerator. Tests of the developed sample on the electron accelerator have proved the applicability of the system to control the electron beam energy in the real-time mode.

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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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FRA04

The Experimental Research of Cyclotron DC-280 Beam Parameters

cyclotron, experiment, diagnostics, electron

102

V.A. Semin, K. Gikal, I.V. Kalagin, N.Yu. Kazarinov, V.I. Mironov, S.V. Mitrofanov, Yu.G. Teterev
JINR, Dubna, Moscow Region, Russia
A. Issatov, L.A. Pavlov, A.A. Protasov
JINR/FLNR, Moscow region, Russia

The DC-280 is the high intensity cyclotron for Super Heavy Elements Factory in FLNR JINR. It was designed for production of accelerated ions beam with intensity up 10 pµA to energy in range 4 - 8 MeV/n. The beam power is up 3,5 kW. The diagnostics elements shall be capable of withstanding this power. Moreover such intensity beam required continuous control for avoid of equipment damage. Special diagnostic equipment were designed, manufactured and commissioning. During the design the calculation of thermal loads was made. Some of them were tested before installation on cyclotron. Diagnostic elements used on DC-280 cyclotron are described in this paper. The special Faraday cup was designed for beam cur-rent measurement. The moving inner probe and multylamellar probe are inside the cyclotron. The Scanning two-dimension ionization profile monitor was produced for space distribution analysis of accelerated high intensity beam. Inner Pickup electrode system with special elec-tronic was created for beam phase moving analysis. Time of flight system based on two pick-up electrodes for energy measured was placed in transport channel. These and over diagnostic system were commissioned and tested. The results present in report.

Slides FRA04 [16.527 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRA04

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Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 13 October 2021 — Issued ※ 22 October 2021

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FRA05

Cyclotron System C-250

proton, cyclotron, resonance, radiation

105

K.E. Smirnov, A.V. Galchuck, Yu.N. Gavrish, S.V. Grigorenko, V.I. Grigoriev, R.M. Klopenkov, L.E. Korolev, K.A. Kravchuk, A.N. Kuzhlev, I.I. Mezhov, V.G. Mudrolyubov, Yu.K. Osina, Yu.I. Stogov, M.V. Usanova
NIIEFA, St. Petersburg, Russia

JSC "NIIEFA" is designing a cyclotron system that gen-erates intensive proton beams with final energy in the range of 30-250 MeV. We have adopted a non-standard technical solution: at the energy of less than 125 MeV negative hydrogen ions are accelerated with the extrac-tion of protons by the stripping device; at higher energies protons are accelerated, and the beam is extracted by a deflector and a magnetic channel. The isochronous de-pendence of the magnetic field on the radius for different final energies is provided by changing the current in the main coil and tuning the correction coils. The cyclotron electromagnet has an H-shaped design with a pole diameter of 4 meters, a four-sector magnetic structure, and high spirality sectors. The dees of the reso-nance system are formed by delta electrodes and placed in the opposite valleys; stems are brought outwards through holes in the valleys. The operating frequency range is 24-33.2 MHz. The power of the RF generator is 60 kW. The cyclotron complex is equipped with a branched beam transport system and target devices for applied re-search on the radiation resistance of materials. Computer control of the cyclotron and its associated systems is provided.

Slides FRA05 [6.105 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRA05

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Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021

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