RuPAC2021 - List of Keywords (dipole)

Paper	Title	Other Keywords	Page
MOY02	NICA Ion Coolider at JINR	collider, booster, injection, 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
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA14	Production of Superconducting Magnets for the NICA Collider at JINR	collider, vacuum, 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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MOPSA46	Preliminary Design Study of the Gantry for the Proton Radiotherapy Center NRC "Kurchatov Institute"	proton, vacuum, quadrupole, synchrotron	196
	A.N. Chernykh, M.S. Bulatov, V.S. Khoroshkov, G.I. Klenov NRC, Moscow, Russia
	A typical proton radiation therapy center, which includes a synchrotron with a power of 250 V, a gantry unit with a 360° rotation angle, and a unit with a fixed channel has been developed at NRC "Kurchatov Institute". In report, a diagram of a magneto-optical channel of a gantry beam installation and a project of a beamline of a gantry beam installation with magnetic elements will be presented. In addition, a frame for accommodation of the magnetic elements of the considered project of the gantry beamline will be presented.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA46
About •	Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021
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TUB02	NICA Collider Magnetic Field Correction System	collider, quadrupole, FEM, 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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TUB03	Methods and Systematic Errors for Searching for the Electric Dipole Moment of Charged Particle Using a Storage Ring	storage-ring, proton, site, experiment	44
	V. Senichev, A.E. Aksentyev, A.A. Melnikov RAS/INR, Moscow, Russia
	One of possible argument for CP-invariance violation is the existence of non-vanishing electric dipole moment (EDM) of elementary particles. To search for the EDM the BNL proposed to construct a special ring implementing the frozen spin mode in order to detect the EDM signal. Since systematic errors determine the sensitivity of a method, this article analyzes some major methods proposed for searching for the EDM from the point of view of this problem. The frequency domain method (FDM) proposed by the authors does not require a special accelerator for deuterons and requires spin precession frequency measurements only. The method has four features: the total spin precession frequency due both to the electric and the magnetic dipole moments in an imperfect ring in the longitudinal-vertical plane is measured at an absolute statistic error value of ~10^-7 rad/sec in one ring filling; the ring elements position remain unchanged when changing the beam circulation direction from clockwise (CW) to counterclockwise (CCW); calibration of the effective Lorentz factor by means of spin precession frequency measurements in the horizontal plane is carried out alternately in each CW and CCW procedure; the approximate relationship between the spin precession frequency components is set to exclude them from mixing to the expected EDM signal at a statistical sensitivity level approaching 10^-29 e cm. The FDM solves the problem of systematic errors, and can be applied in the NICA facility.
	Slides TUB03 [6.184 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB03
About •	Received ※ 10 September 2021 — Revised ※ 18 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 17 October 2021
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TUPSB07	Particle Collimation in the NICA Collider	collider, electron, collimation, scattering	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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TUPSB21	System for Correcting the Longitudinal Length of Electron Bunches for Generation a Free Electron Laser	electron, wakefield, laser, simulation	271
	A. Altmark, N.A. Lesiv, K. Mukhamedgaliev LETI, Saint-Petersburg, Russia
	The chicane is device for longitudinal compression of electron bunch for generation of coherent radiation in free electron laser. It is present a numerical simulation of beam dynamics passing through system which consist dielectric waveguide and four dipole magnets. The simulations made with use the modified Euler method based on Green function knowledge for cylindrical dielectric waveguide. We researched influence of various physical parameters of the electron bunch, as well as the chicane parameters on the change in the longitudinal bunch length. The optimal parameters of the focusing system were proposed for a relativistic particle beam with given initial bunch parameters. Recommendations for the selection of chicane parameters are also presented.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB21
About •	Received ※ 27 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 21 October 2021
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TUPSB47	Stability Conditions for a Penning Trap with Rotating Quadrupole or Dipole Electric Fields	quadrupole, space-charge, experiment, synchrotron	324
	A.D. Ovsyannikov Saint Petersburg State University, Saint Petersburg, Russia
	The dynamics of particles in a Penning Malmberg Surko trap with Rotating Wall (rotating quadrupole and/or dipole electric field) and a buffer gas is considered. Electromagnetic traps are widely used for the accumulation and confinement of charged particles during various experiments in nuclear and accelerator physics, mass spectroscopy, and other fields. Traps are the main element of sources of charged particles in accelerators. An especially important role is played by traps with efficient accumulation during operation (in a cyclic mode) of ion synchrotrons and colliders with short-lived isotopes. The purpose of this work was to develop algorithms for constructing regions of asymptotic stability (according to Lyapunov) in the space of parameters describing additional rotating electric fields, and to determine the analytical conditions that must be satisfied by the trap parameters to achieve a given degree of stability. The influence of the space charge of a beam of accumulated particles on the stability of the system is also investigated. The calculation results and the proposed models can be used in the selection and adjustment of the main parameters of the designed traps of the considered type.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB47
About •	Received ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 15 October 2021
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WEB02	Magnetic Field Measurements for the NICA Collider Magnets and FAIR Quadrupole Units	quadrupole, collider, 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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WEB03	First Experience of Production and Testing the Superconducting Quadrupole and Corrector Magnets for the SIS100 Heavy Ion Accelerator of FAIR	quadrupole, sextupole, operation, synchrotron	75
	E.S. Fischer, Yu.G. Bespalov, T. Parfylo JINR/VBLHEP, Dubna, Moscow region, Russia A. Bleile, A. Waldt GSI, Darmstadt, Germany V.V. Borisov, H.G. Khodzhibagiyan, B.Yu. Kondratiev, D. Nikiforov, M.V. Petrov JINR, Dubna, Moscow Region, Russia
	The fast cycling superconducting SIS100 heavy ion accelerator is the designated working horse of the international Facility for Antiproton and Ion Research (FAIR) under construction at GSI in Darmstadt, Germany. The main dipoles will ramp with 4 T/s and with a repetition frequency of 1 Hz up to a maximum magnetic field of 1.9 T. The field gradient of the main quadrupole will reach 27.77 T/m. The integral magnetic field length of the horizontal/vertical steerer and of the chromaticity sextupole corrector magnets will provide 0.403/0.41 m and 0.383 m, respectively. The series production of the high current quadrupoles and of the individually ramped low current corrector magnets was started in 2020 at the JINR in Dubna and is planned to be completed in 2023. We present the technological challenges that have to be solved from production of the first magnets toward a stable and high rate series production with reliably magnet quality as well as the first test results at operation conditions.
	Slides WEB03 [18.411 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEB03
About •	Received ※ 07 October 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 19 October 2021
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WEPSC18	Serial Magnetic Measurements of the NICA Collider Twin-Aperture Dipoles. The Main Results	collider, 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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WEPSC20	Magnets Design for 2.5 GeV Booster Synchrotron	HOM, sextupole, booster, synchrotron	386
	A.S. Smygacheva, Ye. Fomin, V. Korchuganov NRC, Moscow, Russia
	The Project of complete modernization of the current accelerator complex is in progress in the NRC «Kurchatov Institute». The development of a new booster synchrotron as a part of the injection complex for a new 3-d generation synchrotron light source is included in the Project. The booster synchrotron has 24 dipoles, 60 quadrupoles, 48 sextupoles and 24 correctors. In order to obtain the required field quality, 2D- and 3D-simulations of magnets were carried out. The obtained geometry for each of the magnets is presented in the paper.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC20
About •	Received ※ 18 September 2021 — Revised ※ 23 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 08 October 2021
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WEPSC21	Light Ion Accelerator Magnets	quadrupole, simulation, power-supply, operation	390
	I.A. Yurin, M.S. Dmitriyev, E.N. Indiushnii, S.M. Polozov MEPhI, Moscow, Russia
	At the moment, the National Research Nuclear University (MEPhI) is developing an injector for an accelerator of light ions with an energy of 7.5 MeV / nucleon. The injector uses several tens of quadrupole magnets with a magnetic field gradient of 6-18 T / m and several units of dipole magnets. Key requirements for quadrupole magnets include large aperture, compact transverse dimensions, uniform shape and design, ease of fabrication from a manufacturing standpoint, field accuracy within 0.1%, and low power consumption. This article will describe the requirements, simulation results, and preliminary designs for quadrupole and dipole magnets.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC21
About •	Received ※ 21 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 15 October 2021
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FRA03	Simulation and Design of the Permanent Magnet Multipole for DC140	simulation, factory, permanent-magnet, focusing	99
	V.P. Kukhtin, A.A. Firsov, M. Kaparkova, E.A. Lamzin, M.S. Larionov, A. Makarov, A. Nezhentzev, I.Yu. Rodin, N. Shatil NIIEFA, St. Petersburg, Russia N.S. Edamenko, D.A. Ovsyannikov St. Petersburg State University, St. Petersburg, Russia G.G. Gulbekyan, I.A. Ivanenko, I.V. Kalagin, N.Yu. Kazarinov, N.F. Osipov JINR, Dubna, Moscow Region, Russia S.E. Sytchevsky Saint Petersburg State University, Saint Petersburg, Russia
	Permanent magnet (PM) multipoles in some cases are good candidates in accelerator applications for beam transportation and focusing. The PM quadrupole will be utilized in the DC140 cyclotron which is under construction in JINR. A passive magnetic channel and a PM quad will be used for the compensation of horizontal defocusing in the high and low field regions, respectively. The quad is designed as a set of identical PMs rigidly fixed in a non-magnetic housing and capable to generate a a 8.1 T/m gradient field in the 64x25 mm aperture and 29.926 cm effective length. The error of linear approximation should be 1% or less. A special study was accomplished to define the PM specification reasoning from the demand for desired field strength, simple geometry, minimized nomenclature, and commercial availability. The quad design was selected with the use a 2D analytical model and then optimized in iterative 3D FE simulations with realistic PM shape and magnetic characteristics in mind. The resultant concept is the quad formed with 6 coaxial sections each 5cm in width. Every section has 26 identical PM bricks with the dimensions 11mmx11mmx50mm and different orientations. The PM bricks have remanent induction of 1.185 T and magnetic susceptibility of 0.1. Temperature characteristics and expected lifetime were also analysed. From the results obtained, candidate PM materials were proposed and mechanical and magnetic precision were recommended.
	Slides FRA03 [1.465 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRA03
About •	Received ※ 09 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 12 October 2021
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FRB06	The Results Obtained on "Radiobiological Stand" Facility, Working with the Extracted Carbon Ion Beam of the U-70 Accelerator	experiment, target, status, radiation	124
	V.A. Pikalov, A.G. Alexeev, Y.M. Antipov, V.A. Kalinin, A.V. Koshelev, A.V. Maximov, M.P. Ovsienko, M.K. Polkovnikov, A.P. Soldatov IHEP, Moscow Region, Russia
	This report provides an information of present status of the "Radiobiological stand" facility at the extracted carbon ions beam of the U-70 accelerator. The results of the development of the RBS facility are presented. A plans for development an experimental medical center for carbon ion therapy on the basis of the U-70 accelerator complex are also reported.
	Slides FRB06 [11.249 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB06
About •	Received ※ 26 September 2021 — Revised ※ 08 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 23 October 2021
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Paper

Title

Other Keywords

Page

MOY02

NICA Ion Coolider at JINR

collider, booster, injection, 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

Cite •

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

MOPSA14

Production of Superconducting Magnets for the NICA Collider at JINR

collider, vacuum, 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)

MOPSA46

Preliminary Design Study of the Gantry for the Proton Radiotherapy Center NRC "Kurchatov Institute"

proton, vacuum, quadrupole, synchrotron

196

A.N. Chernykh, M.S. Bulatov, V.S. Khoroshkov, G.I. Klenov
NRC, Moscow, Russia

A typical proton radiation therapy center, which includes a synchrotron with a power of 250 V, a gantry unit with a 360° rotation angle, and a unit with a fixed channel has been developed at NRC "Kurchatov Institute". In report, a diagram of a magneto-optical channel of a gantry beam installation and a project of a beamline of a gantry beam installation with magnetic elements will be presented. In addition, a frame for accommodation of the magnetic elements of the considered project of the gantry beamline will be presented.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA46

About •

Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021

Cite •

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

TUB02

NICA Collider Magnetic Field Correction System

collider, quadrupole, FEM, 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

Cite •

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

TUB03

Methods and Systematic Errors for Searching for the Electric Dipole Moment of Charged Particle Using a Storage Ring

storage-ring, proton, site, experiment

44

V. Senichev, A.E. Aksentyev, A.A. Melnikov
RAS/INR, Moscow, Russia

One of possible argument for CP-invariance violation is the existence of non-vanishing electric dipole moment (EDM) of elementary particles. To search for the EDM the BNL proposed to construct a special ring implementing the frozen spin mode in order to detect the EDM signal. Since systematic errors determine the sensitivity of a method, this article analyzes some major methods proposed for searching for the EDM from the point of view of this problem. The frequency domain method (FDM) proposed by the authors does not require a special accelerator for deuterons and requires spin precession frequency measurements only. The method has four features: the total spin precession frequency due both to the electric and the magnetic dipole moments in an imperfect ring in the longitudinal-vertical plane is measured at an absolute statistic error value of ~10^-7 rad/sec in one ring filling; the ring elements position remain unchanged when changing the beam circulation direction from clockwise (CW) to counterclockwise (CCW); calibration of the effective Lorentz factor by means of spin precession frequency measurements in the horizontal plane is carried out alternately in each CW and CCW procedure; the approximate relationship between the spin precession frequency components is set to exclude them from mixing to the expected EDM signal at a statistical sensitivity level approaching 10^-29 e cm. The FDM solves the problem of systematic errors, and can be applied in the NICA facility.

Slides TUB03 [6.184 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB03

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Received ※ 10 September 2021 — Revised ※ 18 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 17 October 2021

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TUPSB07

Particle Collimation in the NICA Collider

collider, electron, collimation, scattering

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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TUPSB21

System for Correcting the Longitudinal Length of Electron Bunches for Generation a Free Electron Laser

electron, wakefield, laser, simulation

271

A. Altmark, N.A. Lesiv, K. Mukhamedgaliev
LETI, Saint-Petersburg, Russia

The chicane is device for longitudinal compression of electron bunch for generation of coherent radiation in free electron laser. It is present a numerical simulation of beam dynamics passing through system which consist dielectric waveguide and four dipole magnets. The simulations made with use the modified Euler method based on Green function knowledge for cylindrical dielectric waveguide. We researched influence of various physical parameters of the electron bunch, as well as the chicane parameters on the change in the longitudinal bunch length. The optimal parameters of the focusing system were proposed for a relativistic particle beam with given initial bunch parameters. Recommendations for the selection of chicane parameters are also presented.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB21

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Received ※ 27 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 21 October 2021

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TUPSB47

Stability Conditions for a Penning Trap with Rotating Quadrupole or Dipole Electric Fields

quadrupole, space-charge, experiment, synchrotron

324

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

The dynamics of particles in a Penning Malmberg Surko trap with Rotating Wall (rotating quadrupole and/or dipole electric field) and a buffer gas is considered. Electromagnetic traps are widely used for the accumulation and confinement of charged particles during various experiments in nuclear and accelerator physics, mass spectroscopy, and other fields. Traps are the main element of sources of charged particles in accelerators. An especially important role is played by traps with efficient accumulation during operation (in a cyclic mode) of ion synchrotrons and colliders with short-lived isotopes. The purpose of this work was to develop algorithms for constructing regions of asymptotic stability (according to Lyapunov) in the space of parameters describing additional rotating electric fields, and to determine the analytical conditions that must be satisfied by the trap parameters to achieve a given degree of stability. The influence of the space charge of a beam of accumulated particles on the stability of the system is also investigated. The calculation results and the proposed models can be used in the selection and adjustment of the main parameters of the designed traps of the considered type.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB47

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Received ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 15 October 2021

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WEB02

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

quadrupole, collider, 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

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

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WEB03

First Experience of Production and Testing the Superconducting Quadrupole and Corrector Magnets for the SIS100 Heavy Ion Accelerator of FAIR

quadrupole, sextupole, operation, synchrotron

75

E.S. Fischer, Yu.G. Bespalov, T. Parfylo
JINR/VBLHEP, Dubna, Moscow region, Russia
A. Bleile, A. Waldt
GSI, Darmstadt, Germany
V.V. Borisov, H.G. Khodzhibagiyan, B.Yu. Kondratiev, D. Nikiforov, M.V. Petrov
JINR, Dubna, Moscow Region, Russia

The fast cycling superconducting SIS100 heavy ion accelerator is the designated working horse of the international Facility for Antiproton and Ion Research (FAIR) under construction at GSI in Darmstadt, Germany. The main dipoles will ramp with 4 T/s and with a repetition frequency of 1 Hz up to a maximum magnetic field of 1.9 T. The field gradient of the main quadrupole will reach 27.77 T/m. The integral magnetic field length of the horizontal/vertical steerer and of the chromaticity sextupole corrector magnets will provide 0.403/0.41 m and 0.383 m, respectively. The series production of the high current quadrupoles and of the individually ramped low current corrector magnets was started in 2020 at the JINR in Dubna and is planned to be completed in 2023. We present the technological challenges that have to be solved from production of the first magnets toward a stable and high rate series production with reliably magnet quality as well as the first test results at operation conditions.

Slides WEB03 [18.411 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEB03

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Received ※ 07 October 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 19 October 2021

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WEPSC18

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

collider, 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

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

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WEPSC20

Magnets Design for 2.5 GeV Booster Synchrotron

HOM, sextupole, booster, synchrotron

386

A.S. Smygacheva, Ye. Fomin, V. Korchuganov
NRC, Moscow, Russia

The Project of complete modernization of the current accelerator complex is in progress in the NRC «Kurchatov Institute». The development of a new booster synchrotron as a part of the injection complex for a new 3-d generation synchrotron light source is included in the Project. The booster synchrotron has 24 dipoles, 60 quadrupoles, 48 sextupoles and 24 correctors. In order to obtain the required field quality, 2D- and 3D-simulations of magnets were carried out. The obtained geometry for each of the magnets is presented in the paper.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC20

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Received ※ 18 September 2021 — Revised ※ 23 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 08 October 2021

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WEPSC21

Light Ion Accelerator Magnets

quadrupole, simulation, power-supply, operation

390

I.A. Yurin, M.S. Dmitriyev, E.N. Indiushnii, S.M. Polozov
MEPhI, Moscow, Russia

At the moment, the National Research Nuclear University (MEPhI) is developing an injector for an accelerator of light ions with an energy of 7.5 MeV / nucleon. The injector uses several tens of quadrupole magnets with a magnetic field gradient of 6-18 T / m and several units of dipole magnets. Key requirements for quadrupole magnets include large aperture, compact transverse dimensions, uniform shape and design, ease of fabrication from a manufacturing standpoint, field accuracy within 0.1%, and low power consumption. This article will describe the requirements, simulation results, and preliminary designs for quadrupole and dipole magnets.

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC21

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Received ※ 21 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 15 October 2021

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FRA03

Simulation and Design of the Permanent Magnet Multipole for DC140

simulation, factory, permanent-magnet, focusing

99

V.P. Kukhtin, A.A. Firsov, M. Kaparkova, E.A. Lamzin, M.S. Larionov, A. Makarov, A. Nezhentzev, I.Yu. Rodin, N. Shatil
NIIEFA, St. Petersburg, Russia
N.S. Edamenko, D.A. Ovsyannikov
St. Petersburg State University, St. Petersburg, Russia
G.G. Gulbekyan, I.A. Ivanenko, I.V. Kalagin, N.Yu. Kazarinov, N.F. Osipov
JINR, Dubna, Moscow Region, Russia
S.E. Sytchevsky
Saint Petersburg State University, Saint Petersburg, Russia

Permanent magnet (PM) multipoles in some cases are good candidates in accelerator applications for beam transportation and focusing. The PM quadrupole will be utilized in the DC140 cyclotron which is under construction in JINR. A passive magnetic channel and a PM quad will be used for the compensation of horizontal defocusing in the high and low field regions, respectively. The quad is designed as a set of identical PMs rigidly fixed in a non-magnetic housing and capable to generate a a 8.1 T/m gradient field in the 64x25 mm aperture and 29.926 cm effective length. The error of linear approximation should be 1% or less. A special study was accomplished to define the PM specification reasoning from the demand for desired field strength, simple geometry, minimized nomenclature, and commercial availability. The quad design was selected with the use a 2D analytical model and then optimized in iterative 3D FE simulations with realistic PM shape and magnetic characteristics in mind. The resultant concept is the quad formed with 6 coaxial sections each 5cm in width. Every section has 26 identical PM bricks with the dimensions 11mmx11mmx50mm and different orientations. The PM bricks have remanent induction of 1.185 T and magnetic susceptibility of 0.1. Temperature characteristics and expected lifetime were also analysed. From the results obtained, candidate PM materials were proposed and mechanical and magnetic precision were recommended.

Slides FRA03 [1.465 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRA03

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Received ※ 09 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 12 October 2021

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FRB06

The Results Obtained on "Radiobiological Stand" Facility, Working with the Extracted Carbon Ion Beam of the U-70 Accelerator

experiment, target, status, radiation

124

V.A. Pikalov, A.G. Alexeev, Y.M. Antipov, V.A. Kalinin, A.V. Koshelev, A.V. Maximov, M.P. Ovsienko, M.K. Polkovnikov, A.P. Soldatov
IHEP, Moscow Region, Russia

This report provides an information of present status of the "Radiobiological stand" facility at the extracted carbon ions beam of the U-70 accelerator. The results of the development of the RBS facility are presented. A plans for development an experimental medical center for carbon ion therapy on the basis of the U-70 accelerator complex are also reported.

Slides FRB06 [11.249 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB06

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Received ※ 26 September 2021 — Revised ※ 08 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 23 October 2021

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