RuPAC2021 - List of Keywords (quadrupole)

Paper	Title	Other Keywords	Page
MOPSA13	Computer Simulation of the Mechanical Behavior of the FFS Superconducting Quadrupole Coil	induction, simulation, vacuum, experiment	156
	A.D. Riabchikova, A.I. Ageev, Altukhov, Y.V. Altukhov, I. Bogdanov, S. Kozub, T. Ryabov, L. Tkachenko IHEP, Moscow Region, Russia
	In the frame of the work, carried out at the Research Center of the Kurchatov Institute - IHEP on the development of four wide-aperture superconducting quadrupoles, a mathematical study of the mechanical behavior of the coil block of these magnets was carried out. The quadrupoles are intended for use in the magnetic final focusing system (FFS) of the ion beam in the experiments of the HED@FAIR collaboration. At the design stage of superconducting magnets, it is necessary to perform mathematical modeling to analyze the deformation of coil blocks during the assembly stages, cooling to operating temperature and the influence of ponderomotor forces. The results of computer simulation of changes in the geometry and distribution of forces in the coil block at all these stages are necessary to determine the value of the preliminary mechanical stress in the superconducting coil. The main results of numerical simulation of the mechanics of these magnets are presented in the article.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA13
About •	Received ※ 26 September 2021 — Revised ※ 27 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 09 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, dipole, cryogenics	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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MOPSA15	Thermodynamic Characteristics of the Superconducting Quadrupole Magnets of the NICA Booster Synchrotron	booster, synchrotron, experiment, radiation	162
	A.A. Bortsova JINR/VBLHEP, Dubna, Moscow region, Russia H.G. Khodzhibagiyan, D. Nikiforov JINR, Dubna, Moscow Region, Russia
	The Booster synchrotron of the NICA accelerator complex in Dubna is designed for acceleration of heavy ions before injection into the Nuclotron. The first run of the Booster synchrotron was carried out in the end of 2020. This work presents calculated and experimental data of static heat leak and dynamic heat releases for quadrupole magnets of the Booster synchrotron with different configuration of the corrector magnets. Obtained results will be taken into account for development of new superconducting magnets and cryogenic installations.
	Poster MOPSA15 [3.928 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA15
About •	Received ※ 25 September 2021 — Revised ※ 26 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021
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MOPSA46	Preliminary Design Study of the Gantry for the Proton Radiotherapy Center NRC "Kurchatov Institute"	dipole, proton, vacuum, 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, 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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TUPSB08	Magneto-Optical Structure of the NICA Collider With High Critical Energy	sextupole, dynamic-aperture, focusing, collider	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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TUPSB12	Development of a Program Code for Calculation of Charged Particle Dynamics in RFQ	rfq, simulation, acceleration, space-charge	256
	A.S. Boriskov, A.M. Opekunov, L.E. Polyakov, N.V. Zavyalov RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia M.L. Smetanin, A.V. Telnov VNIIEF, Sarov, Russia
	The calculation of charged particles dynamics is the initial stage in the development of an accelerator. The advancement of computer technology makes it possible to calculate particle dynamics using numerical methods with a required accuracy. During beam dynamics calculation it is necessary to take into account RF field force and self-induced Coulomb forces which also have an effect on charged particles. In this paper a model of «large particles» was chosen to simulate a space charge effect. To implement this model, a program code was written using parallel computing tools in the «C» programming language in the CUDA toolkit. The dynamics of ions with a ratio A / Z from 1 to 3.2 (A - the mass number, Z - the charge state of the ion) in the RFQ structure was calculated. The operating frequency of structure is 81.25 MHz, output energy is up to 820 keV / nucleon. Output beam characteristics (relative velocity, particle capture coefficient, beam profile, transverse emittances, longitudinal phase portrait) were determined. These results were verified by the BEAMDULAC-RFQ program. Polozov S. M., Prob. of Atomic Sci. and Tech., 3 (79), 2012, pp. 131-136.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB12
About •	Received ※ 30 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 14 October 2021
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TUPSB47	Stability Conditions for a Penning Trap with Rotating Quadrupole or Dipole Electric Fields	dipole, 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	dipole, 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	sextupole, dipole, 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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WEPSC17	Vibrating Wire System for Fiducialization NICA Booster Superconducting Quadrupole Magnets	focusing, booster, collider, 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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WEPSC21	Light Ion Accelerator Magnets	dipole, 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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WEPSC50	Enhancement of Transverse Beam Phase Space Analysis by Tomography Method at INR Linac	emittance, linac, simulation, cavity	433
	A.I. Titov, S. Bragin, S.A. Gavrilov, O. Volodkevich RAS/INR, Moscow, Russia S.A. Gavrilov, A.I. Titov MIPT, Dolgoprudniy, Moscow Region, Russia
	The investigation of transverse beam phase space parameters behavior along the accelerator is important for proper accelerator tuning. At INR RAS linac transverse emittance and Twiss parameters are reconstructed from beam profile measurements with quadrupole scan technique at several measurement points along the accelerator. Profile treatment is performed with ordinary transverse profiles method and tomographic reconstruction method. Various experimental data is presented. The comparison of the results obtained by the two methods is done. Features of beam dynamics simulation based on the data from these methods are discussed.
	Poster WEPSC50 [6.621 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC50
About •	Received ※ 17 September 2021 — Revised ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 22 October 2021
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FRB07	Transmission Studies With Ion Beams Within FAMA	ion-source, target, light-ion, experiment	127
	Z.M. Jovanovic, R. Balvanovic, M.M. Ćosić, N. Neskovic, I. Teleski VINCA, Belgrade, Republic of Serbia
	Funding: Ministry of Education, Science and Technological Development of the Republic of Serbia. FAMA is a user facility for materials science with low energy ions beams in the Vinca Institute of Nuclear Sciences, Belgrade, Serbia. It includes a heavy ion source, a light ion source, two channels for modification of materials, and two channels for analysis of materials. Recently, designing of a channel for transmission studies within FAMA, the C3 channel, has begun. The initially planned studies are related to the rainbow effects with electrostatic very thin lenses (VTLs) and two-dimensional (2D) materials. In the former case, the main aim is to develop a method for generation of narrow ion beams, to be used, for example, in materials science and technology. The main aim in the latter case is to determine precisely the interaction potential of the projectile and target atoms. In both cases, the theoretical basis of the explorations is the theory of crystal rainbows. From the technological point of view, construction and use of the C3 channel includes the following challenges: (i) production and diagnostics of the narrow and parallel ion beams to be directed to the chosen VTLs and 2D materials, (ii) registration of the transmitted ion beams with high resolution 2D position sensitive detectors, (iii) preparation of the 2D materials and maintaining their cleanliness during the measurements, and (iv) providing the ultra-high vacuum conditions in measurements with the 2D materials.
	Slides FRB07 [11.209 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB07
About •	Received ※ 27 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021
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Paper

Title

Other Keywords

Page

MOPSA13

Computer Simulation of the Mechanical Behavior of the FFS Superconducting Quadrupole Coil

induction, simulation, vacuum, experiment

156

A.D. Riabchikova, A.I. Ageev, Altukhov, Y.V. Altukhov, I. Bogdanov, S. Kozub, T. Ryabov, L. Tkachenko
IHEP, Moscow Region, Russia

In the frame of the work, carried out at the Research Center of the Kurchatov Institute - IHEP on the development of four wide-aperture superconducting quadrupoles, a mathematical study of the mechanical behavior of the coil block of these magnets was carried out. The quadrupoles are intended for use in the magnetic final focusing system (FFS) of the ion beam in the experiments of the HED@FAIR collaboration. At the design stage of superconducting magnets, it is necessary to perform mathematical modeling to analyze the deformation of coil blocks during the assembly stages, cooling to operating temperature and the influence of ponderomotor forces. The results of computer simulation of changes in the geometry and distribution of forces in the coil block at all these stages are necessary to determine the value of the preliminary mechanical stress in the superconducting coil. The main results of numerical simulation of the mechanics of these magnets are presented in the article.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA13

About •

Received ※ 26 September 2021 — Revised ※ 27 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 09 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, dipole, cryogenics

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)

MOPSA15

Thermodynamic Characteristics of the Superconducting Quadrupole Magnets of the NICA Booster Synchrotron

booster, synchrotron, experiment, radiation

162

A.A. Bortsova
JINR/VBLHEP, Dubna, Moscow region, Russia
H.G. Khodzhibagiyan, D. Nikiforov
JINR, Dubna, Moscow Region, Russia

The Booster synchrotron of the NICA accelerator complex in Dubna is designed for acceleration of heavy ions before injection into the Nuclotron. The first run of the Booster synchrotron was carried out in the end of 2020. This work presents calculated and experimental data of static heat leak and dynamic heat releases for quadrupole magnets of the Booster synchrotron with different configuration of the corrector magnets. Obtained results will be taken into account for development of new superconducting magnets and cryogenic installations.

Poster MOPSA15 [3.928 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA15

About •

Received ※ 25 September 2021 — Revised ※ 26 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021

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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"

dipole, proton, vacuum, 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, 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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TUPSB08

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

sextupole, dynamic-aperture, focusing, collider

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

TUPSB12

Development of a Program Code for Calculation of Charged Particle Dynamics in RFQ

rfq, simulation, acceleration, space-charge

256

A.S. Boriskov, A.M. Opekunov, L.E. Polyakov, N.V. Zavyalov
RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia
M.L. Smetanin, A.V. Telnov
VNIIEF, Sarov, Russia

The calculation of charged particles dynamics is the initial stage in the development of an accelerator. The advancement of computer technology makes it possible to calculate particle dynamics using numerical methods with a required accuracy. During beam dynamics calculation it is necessary to take into account RF field force and self-induced Coulomb forces which also have an effect on charged particles. In this paper a model of «large particles» was chosen to simulate a space charge effect. To implement this model, a program code was written using parallel computing tools in the «C» programming language in the CUDA toolkit. The dynamics of ions with a ratio A / Z from 1 to 3.2 (A - the mass number, Z - the charge state of the ion) in the RFQ structure was calculated. The operating frequency of structure is 81.25 MHz, output energy is up to 820 keV / nucleon. Output beam characteristics (relative velocity, particle capture coefficient, beam profile, transverse emittances, longitudinal phase portrait) were determined. These results were verified by the BEAMDULAC-RFQ program*.
* Polozov S. M., Prob. of Atomic Sci. and Tech., 3 (79), 2012, pp. 131-136.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB12

About •

Received ※ 30 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 14 October 2021

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

TUPSB47

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

dipole, 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

dipole, 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

sextupole, dipole, 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

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

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WEPSC17

Vibrating Wire System for Fiducialization NICA Booster Superconducting Quadrupole Magnets

focusing, booster, collider, 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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WEPSC21

Light Ion Accelerator Magnets

dipole, 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

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

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WEPSC50

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

emittance, linac, simulation, cavity

433

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

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

Poster WEPSC50 [6.621 MB]

DOI •

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

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

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FRB07

Transmission Studies With Ion Beams Within FAMA

ion-source, target, light-ion, experiment

127

Z.M. Jovanovic, R. Balvanovic, M.M. Ćosić, N. Neskovic, I. Teleski
VINCA, Belgrade, Republic of Serbia

Funding: Ministry of Education, Science and Technological Development of the Republic of Serbia.
FAMA is a user facility for materials science with low energy ions beams in the Vinca Institute of Nuclear Sciences, Belgrade, Serbia. It includes a heavy ion source, a light ion source, two channels for modification of materials, and two channels for analysis of materials. Recently, designing of a channel for transmission studies within FAMA, the C3 channel, has begun. The initially planned studies are related to the rainbow effects with electrostatic very thin lenses (VTLs) and two-dimensional (2D) materials. In the former case, the main aim is to develop a method for generation of narrow ion beams, to be used, for example, in materials science and technology. The main aim in the latter case is to determine precisely the interaction potential of the projectile and target atoms. In both cases, the theoretical basis of the explorations is the theory of crystal rainbows. From the technological point of view, construction and use of the C3 channel includes the following challenges: (i) production and diagnostics of the narrow and parallel ion beams to be directed to the chosen VTLs and 2D materials, (ii) registration of the transmitted ion beams with high resolution 2D position sensitive detectors, (iii) preparation of the 2D materials and maintaining their cleanliness during the measurements, and (iv) providing the ultra-high vacuum conditions in measurements with the 2D materials.

Slides FRB07 [11.209 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB07

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Received ※ 27 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021

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