RuPAC2021 - List of Keywords (collider)

Paper	Title	Other Keywords	Page
MOY02	NICA Ion Coolider at JINR	booster, injection, dipole, kicker	12
	E. Syresin, N.N. Agapov, A.V. Alfeev, V. Andreev, A.A. Baldin, A.M. Bazanov, O.I. Brovko, V.V. Bugaev, A.V. Butenko, D.E. Donets, E.D. Donets, E.E. Donets, A.V. Eliseev, G.A. Filatov, V.V. Fimushkin, A.R. Galimov, B.V. Golovenskiy, E.V. Gorbachev, A. Govorov, A.Yu. Grebentsov, E.V. Ivanov, V. Karpinsky, V. Kekelidze, H.G. Khodzhibagiyan, A. Kirichenko, A.G. Kobets, V.V. Kobets, S.A. Korovkin, S.A. Kostromin, O.S. Kozlov, K.A. Levterov, D.A. Lyuosev, A.M. Malyshev, A.A. Martynov, S.A. Melnikov, I.N. Meshkov, V.A. Mikhailov, Iu.A. Mitrofanova, V.A. Monchinsky, A. Nesterov, A.L. Osipenkov, A.V. Philippov, R.V. Pivin, D.O. Ponkin, S. Romanov, P.A. Rukojatkin, I.V. Shirikov, A.A. Shurygin, A.O. Sidorin, V. Slepnev, A. Slivin, G.V. Trubnikov, A. Tuzikov, B. Vasilishin, V. Volkov JINR, Dubna, Moscow Region, Russia I.V. Gorelyshev, A.V. Konstantinov, K.G. Osipov JINR/VBLHEP, Dubna, Moscow region, Russia
	The Nuclotron-based Ion Collider fAcility (NICA) is under construction in JINR. The NICA goals are providing of colliding beams for studies of hot and dense strongly interacting baryonic matter and spin physics. The accelerator facility of collider NICA consists of following elements: acting Alvarez-type linac LU-20 of light ions at energy 5 MeV/u, constructed a new light ion linac of light ions at energy 7 MeV/n and protons at energy 13 MeV, new acting heavy ion linac HILAC with RFQ and IH DTL sections at energy 3.2 MeV/u, new acting superconducting booster synchrotron at energy up 600 MeV/u, acting superconducting synchrotron Nuclotron at gold ion energy 4.5 GeV/n and mounted two Collider storage rings with two interaction points. The status of acceleration complex NICA is under discussion.
	Slides MOY02 [15.467 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOY02
About •	Received ※ 24 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 12 October 2021
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MOPSA14	Production of Superconducting Magnets for the NICA Collider at JINR	vacuum, dipole, cryogenics, quadrupole	159
	S.A. Korovkin, V.V. Borisov, H.G. Khodzhibagiyan, H.G. Khodzhibagiyan, S.A. Kostromin, S.A. Kostromin, D. Nikiforov, M.V. Petrov JINR, Dubna, Moscow Region, Russia Yu.G. Bespalov, S.A. Kostromin JINR/VBLHEP, Dubna, Moscow region, Russia
	The collider structure of the NICA project includes 86 quadrupole and 80 dipole superconducting (SC) magnets. The serial production and testing of these magnets are near to completion at the Veksler and Baldin Laboratory of High Energy Physics of the Joint Institute for Nuclear Research (VBLHEP, JINR). Manufacturing and assembly technology directly affects the quality of the magnetic field. The article describes the technology behind the production of different NICA collider magnets.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA14
About •	Received ※ 29 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 23 October 2021
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MOPSA17	Automated System for Heating High-Vacuum Elements of Superconducting Synchrotrons of the NICA Complex	controls, vacuum, synchrotron, booster	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
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TUY01	VEPP-2000 Collider Complex Operation in 2019-2021 Runs	luminosity, operation, vacuum, detector	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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TUB02	NICA Collider Magnetic Field Correction System	quadrupole, FEM, dipole, lattice	41
	M.M. Shandov, H.G. Khodzhibagiyan JINR, Dubna, Russia S.A. Kostromin, O.S. Kozlov, I. Nikolaichuk, T. Parfylo, A.V. Philippov, A. Tuzikov JINR/VBLHEP, Dubna, Moscow region, Russia
	The NICA Collider is a new superconducting facility that has two storage rings, each of about 503 m in circumference, which is under construction at the Joint Institute for Nuclear Research, Dubna, Russia. The influence of the fringe fields and misalignments of the lattice magnets, the field imperfections and natural chromaticity should be corrected by the magnetic field correction system. The layout and technical specification of the magnetic field correction system, the main parameters, arrangements and the field calculations and measurement results of the corrector magnets are presented. The results of dynamic aperture calculation at working energies are shown.
	Slides TUB02 [2.299 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB02
About •	Received ※ 07 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 17 October 2021
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TUB04	Development of the Electron Cooling System for NICA Collider	electron, gun, high-voltage, solenoid	48
	M.I. Bryzgunov, A.M. Batrakov, E.A. Bekhtenev, O.V. Belikov, A.V. Bubley, V.A. Chekavinskiy, A.P. Denisov, M.G. Fedotov, A.D. Goncharov, K. Gorchakov, V.C. Gosteyev, I.A. Gusev, I.V. Ilyin, A.V. Ivanov, G.V. Karpov, M.N. Kondaurov, N.S. Kremnev, V.M. Panasyuk, V.V. Parkhomchuk, D.N. Pureskin, A.A. Putmakov, V.B. Reva, D.V. Senkov, K.S. Shtro, D.N. Skorobogatov, R.V. Vakhrushev, A.A. Zharikov BINP SB RAS, Novosibirsk, Russia E.A. Bekhtenev, A.V. Ivanov, N.S. Kremnev, V.B. Reva NSU, Novosibirsk, Russia
	The high voltage electron cooling system for the NICA collider is now under development in the Budker Institute of Nuclear Physics (Russia). The aim of the cooler is to increase ion beams intencity during accumulation and to decrease both longitudinal and transverse emmitances of colliding beams during experiment in order to increase luminosity. Status of its development and results of tests of the cooler elements are described in the article.
	Slides TUB04 [16.028 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB04
About •	Received ※ 04 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 24 October 2021
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TUPSB05	Longitudinal Impedance of the NICA Collider Ring and Ion Beam Stability	impedance, kicker, feedback, vacuum	239
	S.A. Melnikov, E.V. Ahmanova, I.N. Meshkov JINR, Dubna, Moscow Region, Russia A.V. Ivanov NSU, Novosibirsk, Russia A.V. Ivanov BINP SB RAS, Novosibirsk, Russia M.Yu. Korobitsina, K.G. Osipov JINR/VBLHEP, Dubna, Moscow region, Russia
	The report presents the results of optimization of the longitudinal coupling impedance of the NICA collider ring using numerical simulation of its individual elements by the CST Studio. Based on the obtained results, analytical estimates of the stability of the ion beam in the ring are obtained for one energy value - 3 GeV/u.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB05
About •	Received ※ 27 September 2021 — Revised ※ 04 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 14 October 2021
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TUPSB07	Particle Collimation in the NICA Collider	electron, collimation, scattering, dipole	242
	O.S. Kozlov, I.N. Meshkov JINR, Dubna, Moscow Region, Russia E. Syresin JINR/VBLHEP, Dubna, Moscow region, Russia
	The system of particles collimation developed for the NICA collider is considered. The main collimation goal is the beam halo cleaning to minimize the background for experiment. The main mechanisms of particle losses, including the ion recombination in electron cooler, are also reviewed.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB07
About •	Received ※ 24 September 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 18 October 2021
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TUPSB08	Magneto-Optical Structure of the NICA Collider With High Critical Energy	quadrupole, sextupole, dynamic-aperture, focusing	245
	S.D. Kolokolchikov, V. Senichev RAS/INR, Moscow, Russia E. Syresin JINR, Dubna, Moscow Region, Russia
	In the proton option of the NICA collider, there is a problem of crossing transition energy. To do this, we have investigated ways to increase the critical energy for the proton option of the NICA collider. The method of superperiodic modulation of quadrupole gradients is applied. Two variants of dispersion suppression on the arch for matching with straight sections are considered. The selection of sextupoles is carried out to suppress the natural chromaticity and compensate for the sextupole component. The Twiss parameters for the proposed structures are given, as well as the dynamic apertures and working points are investigated.
	Poster TUPSB08 [3.646 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB08
About •	Received ※ 17 September 2021 — Revised ※ 27 September 2021 — Accepted ※ 02 October 2021 — Issued ※ 21 October 2021
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TUPSB13	Charged Particle Dynamics Optimization in Discrete Systems	controls, dynamic-aperture, 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
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WEB02	Magnetic Field Measurements for the NICA Collider Magnets and FAIR Quadrupole Units	quadrupole, dipole, multipole, controls	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
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WED04	Precise Analysis of Beam Optics at the VEPP-4M by Turn-by-Turn Betatron Phase Advance Measurement	optics, lattice, betatron, experiment	79
	I.A. Morozov, P.A. Piminov, I.S. Yakimov BINP SB RAS, Novosibirsk, Russia
	Turn-by-turn (TbT) beam centroid signals can be used to evaluate various relevant accelerator parameters including betatron frequencies and optical functions. Accurate estimation of parameters and corresponding variances are important to drive accelerator lattice correction. Signals acquired from beam position monitors (BPMs) are limited by beam decoherence and BPM resolution. Therefore, it is important to obtain accurate estimations from available data. Several methods based on harmonic analysis of TbT data are compared and applied to the VEPP-4M experimental signals. The accuracy of betatron frequency, amplitude, and phase measurements are investigated. Optical functions obtained from amplitudes and phases are compared.
	Slides WED04 [3.771 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WED04
About •	Received ※ 12 September 2021 — Revised ※ 20 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 20 October 2021
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WEPSC15	Barrier Station RF1 of the NICA Collider. Design Features and Influence on Beam Dynamics	impedance, injection, simulation, space-charge	373
	A.M. Malyshev, A.A. Krasnov, Ya.G. Kruchkov, S.A. Krutikhin, G.Y. Kurkin, A.Yu. Martynovsky, N.V. Mityanina, S.V. Motygin, A.A. Murasev, V.N. Osipov, V.M. Petrov, A.M. Pilan, E. Rotov, V.V. Tarnetsky, A.G. Tribendis, I.A. Zapryagaev, A.A. Zhukov BINP SB RAS, Novosibirsk, Russia O.I. Brovko, I.N. Meshkov, E. Syresin JINR/VBLHEP, Moscow, Russia I.N. Meshkov Saint Petersburg State University, Saint Petersburg, Russia E. Rotov NSU, Novosibirsk, Russia A.G. Tribendis NSTU, Novosibirsk, Russia
	This paper reports on the design features and con-struction progress of the barrier bucket RF systems for the NICA collider being built at JINR, Dubna. Each of two collider rings has three RF systems named RF1 to 3. RF1 is a barrier bucket system used for particles capturing and accumulation during injection, RF2 and 3 are resonant systems operating at 22nd and 66th harmonics of the revolution frequency and used for the 22 bunches formation. The RF systems are de-signed by Budker INP. Both RF1 stations were manu-factured, delivered to JINR and tested at the stand. The test results are presented in the article, as well as some results of calculating the effect of the RF1 system on the beam dynamics.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC15
About •	Received ※ 24 September 2021 — Revised ※ 26 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 18 October 2021
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WEPSC17	Vibrating Wire System for Fiducialization NICA Booster Superconducting Quadrupole Magnets	focusing, quadrupole, booster, synchrotron	379
	T. Parfylo, M.A. Kashunin, V.A. Mykhailenko JINR/VBLHEP, Dubna, Moscow region, Russia V.V. Borisov, H.G. Khodzhibagiyan, B.Yu. Kondratiev, S.A. Kostromin, M.M. Shandov JINR, Dubna, Moscow Region, Russia
	The NICA (Nuclotron-based Ion Collider fAcility) is anew accelerator complex under construction at the the Laboratory of High Energy Physics (LHEP) JINR. The facility includes two injector chains, two existing superconducting synchrotrons Nuclotron and a new Booster, under construction superconducting Collider, consisting of two rings. The lattice of the Booster includes 48 superconducting quadrupole magnets that combined in doublets. Each doublet must be fiducialized to the calculated trajectory of the beam. Alignment of the magnetic axis is necessary for properly install the magnets at the beam trajectory. The vibrating wire technique was applied to obtain the position of the magnetic axis. A new measurement system has been worked out and produced at the LHEP. The magnetic axis positions of the quadrupole doublets are determined at the ambient temperature. Thepaper describes design of the measurement system, measuring procedure and results of the magnetic axis position measurements.
	Poster WEPSC17 [0.693 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC17
About •	Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 22 October 2021
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WEPSC18	Serial Magnetic Measurements of the NICA Collider Twin-Aperture Dipoles. The Main Results	dipole, acceleration, superconducting-magnet, status	383
	D.A. Zolotykh, I.I. Donguzov, S.A. Kostromin, I. Nikolaichuk, T. Parfylo, M.M. Shandov, A.V. Shemchuk, E.V. Zolotykh JINR/VBLHEP, Dubna, Moscow region, Russia V.V. Borisov, O. Golubitsky, H.G. Khodzhibagiyan, B.Yu. Kondratiev JINR, Dubna, Moscow Region, Russia
	NICA Collider includes 80 dipole two-aperture superconducting magnets. 80 main and 6 reserve magnets were manufactured and tested by specially designed magnetic measurement system. Dipoles were tested at an ambient and operating temperatures. This paper contains the main results of magnetic measurements of the NICA Collider dipoles.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC18
About •	Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 22 October 2021
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Paper

Title

Other Keywords

Page

MOY02

NICA Ion Coolider at JINR

booster, injection, dipole, kicker

12

E. Syresin, N.N. Agapov, A.V. Alfeev, V. Andreev, A.A. Baldin, A.M. Bazanov, O.I. Brovko, V.V. Bugaev, A.V. Butenko, D.E. Donets, E.D. Donets, E.E. Donets, A.V. Eliseev, G.A. Filatov, V.V. Fimushkin, A.R. Galimov, B.V. Golovenskiy, E.V. Gorbachev, A. Govorov, A.Yu. Grebentsov, E.V. Ivanov, V. Karpinsky, V. Kekelidze, H.G. Khodzhibagiyan, A. Kirichenko, A.G. Kobets, V.V. Kobets, S.A. Korovkin, S.A. Kostromin, O.S. Kozlov, K.A. Levterov, D.A. Lyuosev, A.M. Malyshev, A.A. Martynov, S.A. Melnikov, I.N. Meshkov, V.A. Mikhailov, Iu.A. Mitrofanova, V.A. Monchinsky, A. Nesterov, A.L. Osipenkov, A.V. Philippov, R.V. Pivin, D.O. Ponkin, S. Romanov, P.A. Rukojatkin, I.V. Shirikov, A.A. Shurygin, A.O. Sidorin, V. Slepnev, A. Slivin, G.V. Trubnikov, A. Tuzikov, B. Vasilishin, V. Volkov
JINR, Dubna, Moscow Region, Russia
I.V. Gorelyshev, A.V. Konstantinov, K.G. Osipov
JINR/VBLHEP, Dubna, Moscow region, Russia

The Nuclotron-based Ion Collider fAcility (NICA) is under construction in JINR. The NICA goals are providing of colliding beams for studies of hot and dense strongly interacting baryonic matter and spin physics. The accelerator facility of collider NICA consists of following elements: acting Alvarez-type linac LU-20 of light ions at energy 5 MeV/u, constructed a new light ion linac of light ions at energy 7 MeV/n and protons at energy 13 MeV, new acting heavy ion linac HILAC with RFQ and IH DTL sections at energy 3.2 MeV/u, new acting superconducting booster synchrotron at energy up 600 MeV/u, acting superconducting synchrotron Nuclotron at gold ion energy 4.5 GeV/n and mounted two Collider storage rings with two interaction points. The status of acceleration complex NICA is under discussion.

Slides MOY02 [15.467 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOY02

About •

Received ※ 24 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 12 October 2021

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

MOPSA14

Production of Superconducting Magnets for the NICA Collider at JINR

vacuum, dipole, cryogenics, quadrupole

159

S.A. Korovkin, V.V. Borisov, H.G. Khodzhibagiyan, H.G. Khodzhibagiyan, S.A. Kostromin, S.A. Kostromin, D. Nikiforov, M.V. Petrov
JINR, Dubna, Moscow Region, Russia
Yu.G. Bespalov, S.A. Kostromin
JINR/VBLHEP, Dubna, Moscow region, Russia

The collider structure of the NICA project includes 86 quadrupole and 80 dipole superconducting (SC) magnets. The serial production and testing of these magnets are near to completion at the Veksler and Baldin Laboratory of High Energy Physics of the Joint Institute for Nuclear Research (VBLHEP, JINR). Manufacturing and assembly technology directly affects the quality of the magnetic field. The article describes the technology behind the production of different NICA collider magnets.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA14

About •

Received ※ 29 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 23 October 2021

Cite •

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

MOPSA17

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

controls, vacuum, synchrotron, booster

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

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TUY01

VEPP-2000 Collider Complex Operation in 2019-2021 Runs

luminosity, operation, vacuum, detector

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

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

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TUB02

NICA Collider Magnetic Field Correction System

quadrupole, FEM, dipole, lattice

41

M.M. Shandov, H.G. Khodzhibagiyan
JINR, Dubna, Russia
S.A. Kostromin, O.S. Kozlov, I. Nikolaichuk, T. Parfylo, A.V. Philippov, A. Tuzikov
JINR/VBLHEP, Dubna, Moscow region, Russia

The NICA Collider is a new superconducting facility that has two storage rings, each of about 503 m in circumference, which is under construction at the Joint Institute for Nuclear Research, Dubna, Russia. The influence of the fringe fields and misalignments of the lattice magnets, the field imperfections and natural chromaticity should be corrected by the magnetic field correction system. The layout and technical specification of the magnetic field correction system, the main parameters, arrangements and the field calculations and measurement results of the corrector magnets are presented. The results of dynamic aperture calculation at working energies are shown.

Slides TUB02 [2.299 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB02

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Received ※ 07 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 17 October 2021

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TUB04

Development of the Electron Cooling System for NICA Collider

electron, gun, high-voltage, solenoid

48

M.I. Bryzgunov, A.M. Batrakov, E.A. Bekhtenev, O.V. Belikov, A.V. Bubley, V.A. Chekavinskiy, A.P. Denisov, M.G. Fedotov, A.D. Goncharov, K. Gorchakov, V.C. Gosteyev, I.A. Gusev, I.V. Ilyin, A.V. Ivanov, G.V. Karpov, M.N. Kondaurov, N.S. Kremnev, V.M. Panasyuk, V.V. Parkhomchuk, D.N. Pureskin, A.A. Putmakov, V.B. Reva, D.V. Senkov, K.S. Shtro, D.N. Skorobogatov, R.V. Vakhrushev, A.A. Zharikov
BINP SB RAS, Novosibirsk, Russia
E.A. Bekhtenev, A.V. Ivanov, N.S. Kremnev, V.B. Reva
NSU, Novosibirsk, Russia

The high voltage electron cooling system for the NICA collider is now under development in the Budker Institute of Nuclear Physics (Russia). The aim of the cooler is to increase ion beams intencity during accumulation and to decrease both longitudinal and transverse emmitances of colliding beams during experiment in order to increase luminosity. Status of its development and results of tests of the cooler elements are described in the article.

Slides TUB04 [16.028 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB04

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Received ※ 04 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 24 October 2021

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TUPSB05

Longitudinal Impedance of the NICA Collider Ring and Ion Beam Stability

impedance, kicker, feedback, vacuum

239

S.A. Melnikov, E.V. Ahmanova, I.N. Meshkov
JINR, Dubna, Moscow Region, Russia
A.V. Ivanov
NSU, Novosibirsk, Russia
A.V. Ivanov
BINP SB RAS, Novosibirsk, Russia
M.Yu. Korobitsina, K.G. Osipov
JINR/VBLHEP, Dubna, Moscow region, Russia

The report presents the results of optimization of the longitudinal coupling impedance of the NICA collider ring using numerical simulation of its individual elements by the CST Studio. Based on the obtained results, analytical estimates of the stability of the ion beam in the ring are obtained for one energy value - 3 GeV/u.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB05

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Received ※ 27 September 2021 — Revised ※ 04 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 14 October 2021

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TUPSB07

Particle Collimation in the NICA Collider

electron, collimation, scattering, dipole

242

O.S. Kozlov, I.N. Meshkov
JINR, Dubna, Moscow Region, Russia
E. Syresin
JINR/VBLHEP, Dubna, Moscow region, Russia

The system of particles collimation developed for the NICA collider is considered. The main collimation goal is the beam halo cleaning to minimize the background for experiment. The main mechanisms of particle losses, including the ion recombination in electron cooler, are also reviewed.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB07

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Received ※ 24 September 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 18 October 2021

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TUPSB08

Magneto-Optical Structure of the NICA Collider With High Critical Energy

quadrupole, sextupole, dynamic-aperture, focusing

245

S.D. Kolokolchikov, V. Senichev
RAS/INR, Moscow, Russia
E. Syresin
JINR, Dubna, Moscow Region, Russia

In the proton option of the NICA collider, there is a problem of crossing transition energy. To do this, we have investigated ways to increase the critical energy for the proton option of the NICA collider. The method of superperiodic modulation of quadrupole gradients is applied. Two variants of dispersion suppression on the arch for matching with straight sections are considered. The selection of sextupoles is carried out to suppress the natural chromaticity and compensate for the sextupole component. The Twiss parameters for the proposed structures are given, as well as the dynamic apertures and working points are investigated.

Poster TUPSB08 [3.646 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB08

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Received ※ 17 September 2021 — Revised ※ 27 September 2021 — Accepted ※ 02 October 2021 — Issued ※ 21 October 2021

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TUPSB13

Charged Particle Dynamics Optimization in Discrete Systems

controls, dynamic-aperture, 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

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

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WEB02

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

quadrupole, dipole, multipole, controls

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]

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

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

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WED04

Precise Analysis of Beam Optics at the VEPP-4M by Turn-by-Turn Betatron Phase Advance Measurement

optics, lattice, betatron, experiment

79

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

Turn-by-turn (TbT) beam centroid signals can be used to evaluate various relevant accelerator parameters including betatron frequencies and optical functions. Accurate estimation of parameters and corresponding variances are important to drive accelerator lattice correction. Signals acquired from beam position monitors (BPMs) are limited by beam decoherence and BPM resolution. Therefore, it is important to obtain accurate estimations from available data. Several methods based on harmonic analysis of TbT data are compared and applied to the VEPP-4M experimental signals. The accuracy of betatron frequency, amplitude, and phase measurements are investigated. Optical functions obtained from amplitudes and phases are compared.

Slides WED04 [3.771 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WED04

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Received ※ 12 September 2021 — Revised ※ 20 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 20 October 2021

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WEPSC15

Barrier Station RF1 of the NICA Collider. Design Features and Influence on Beam Dynamics

impedance, injection, simulation, space-charge

373

A.M. Malyshev, A.A. Krasnov, Ya.G. Kruchkov, S.A. Krutikhin, G.Y. Kurkin, A.Yu. Martynovsky, N.V. Mityanina, S.V. Motygin, A.A. Murasev, V.N. Osipov, V.M. Petrov, A.M. Pilan, E. Rotov, V.V. Tarnetsky, A.G. Tribendis, I.A. Zapryagaev, A.A. Zhukov
BINP SB RAS, Novosibirsk, Russia
O.I. Brovko, I.N. Meshkov, E. Syresin
JINR/VBLHEP, Moscow, Russia
I.N. Meshkov
Saint Petersburg State University, Saint Petersburg, Russia
E. Rotov
NSU, Novosibirsk, Russia
A.G. Tribendis
NSTU, Novosibirsk, Russia

This paper reports on the design features and con-struction progress of the barrier bucket RF systems for the NICA collider being built at JINR, Dubna. Each of two collider rings has three RF systems named RF1 to 3. RF1 is a barrier bucket system used for particles capturing and accumulation during injection, RF2 and 3 are resonant systems operating at 22nd and 66th harmonics of the revolution frequency and used for the 22 bunches formation. The RF systems are de-signed by Budker INP. Both RF1 stations were manu-factured, delivered to JINR and tested at the stand. The test results are presented in the article, as well as some results of calculating the effect of the RF1 system on the beam dynamics.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC15

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Received ※ 24 September 2021 — Revised ※ 26 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 18 October 2021

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WEPSC17

Vibrating Wire System for Fiducialization NICA Booster Superconducting Quadrupole Magnets

focusing, quadrupole, booster, synchrotron

379

T. Parfylo, M.A. Kashunin, V.A. Mykhailenko
JINR/VBLHEP, Dubna, Moscow region, Russia
V.V. Borisov, H.G. Khodzhibagiyan, B.Yu. Kondratiev, S.A. Kostromin, M.M. Shandov
JINR, Dubna, Moscow Region, Russia

The NICA (Nuclotron-based Ion Collider fAcility) is anew accelerator complex under construction at the the Laboratory of High Energy Physics (LHEP) JINR. The facility includes two injector chains, two existing superconducting synchrotrons Nuclotron and a new Booster, under construction superconducting Collider, consisting of two rings. The lattice of the Booster includes 48 superconducting quadrupole magnets that combined in doublets. Each doublet must be fiducialized to the calculated trajectory of the beam. Alignment of the magnetic axis is necessary for properly install the magnets at the beam trajectory. The vibrating wire technique was applied to obtain the position of the magnetic axis. A new measurement system has been worked out and produced at the LHEP. The magnetic axis positions of the quadrupole doublets are determined at the ambient temperature. Thepaper describes design of the measurement system, measuring procedure and results of the magnetic axis position measurements.

Poster WEPSC17 [0.693 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC17

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Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 22 October 2021

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WEPSC18

Serial Magnetic Measurements of the NICA Collider Twin-Aperture Dipoles. The Main Results

dipole, acceleration, superconducting-magnet, status

383

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

NICA Collider includes 80 dipole two-aperture superconducting magnets. 80 main and 6 reserve magnets were manufactured and tested by specially designed magnetic measurement system. Dipoles were tested at an ambient and operating temperatures. This paper contains the main results of magnetic measurements of the NICA Collider dipoles.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC18

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Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 22 October 2021

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