TUB —  Beam dynamics, new acceleration and cooling methods   (28-Sep-21   11:50—15:50)
Paper Title Page
TUB01
 Ion Beam Dynamics in NICA Collider  
 
  • S.A. Kostromin
    JINR, Dubna, Moscow Region, Russia
  
  Main beam parameters of NICA collider are reviewed. Luminosity value and its main limiting factors are discussed. Collider ring structure and the main parameters of the beam formation system are presented. IBS influence xtox on the luminosity lifetime are estimated. Ring optics non-linearities influence on the collider dynamic aperture are considered.  
slides icon Slides TUB01 [9.393 MB]  
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TUB02 NICA Collider Magnetic Field Correction System 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 icon 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 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 icon 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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TUB04 Development of the Electron Cooling System for NICA Collider 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 icon 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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TUB06
 NICA Stochastic Cooling: Conceptual Design Project and Status  
 
  • I.V. Gorelyshev, K.G. Osipov, A.O. Sidorin
    JINR/VBLHEP, Dubna, Moscow region, Russia
  • V.V. Filimonov
    JINR, Dubna, Russia
  • A.O. Sidorin
    Saint Petersburg State University, Saint Petersburg, Russia
  
  The broadband feedback system for the beam stochastic cooling is one of the crucial elements of the NICA collider. The goals of the system are to support the beam accumulation and to preserve the beam quality during collisions by counteracting the beam heating processes. The Conceptual Design Project and current status of the system are presented.  
slides icon Slides TUB06 [3.443 MB]  
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TUB07 The Conceptual Design of the 7.5 MeV/u Light Ion Injector 51
 
  • S.M. Polozov, A.E. Aksentyev, M.M. Bulgacheva, O.V. Deryabochkin, M.S. Dmitriyev, V.V. Dmitriyeva, M.V. Dyakonov, V.S. Dyubkov, A.V. Gerasimenko, A.A. Gorchakov, M. Gusarova, M.A. Guzov, E.N. Indiushnii, A.M. Korshunov, K.I. Kozlovskiy, A.S. Krasnov, M.V. Lalayan, Y. Lozeev, T.A. Lozeeva, A.I. Makarov, S.V. Matsievskiy, A.P. Melekhov, O.V. Murygin, R.E. Nemchenko, G.G. Novikov, A.E. Novozhilov, A.S. Panishev, V.N. Pashentsev, A.G. Ponomarenko, A.V. Prokopenko, V.I. Rashchikov, A.V. Samoshin, A.A. Savchik, V.L. Shatokhin, A.E. Shikanov, K.D. Smirnov, G.A. Tsarev, S.A. Tumanov, I.A. Yurin, M.I. Zhigailova
    MEPhI, Moscow, Russia
  • M.L. Smetanin, A.V. Telnov
    VNIIEF, Sarov, Russia
  • N.V. Zavyalov
    RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia
  
  The new linac for light ion beam injection is under development at MEPhI. Such linac was proposed for acceleration of 7.5 MeV/u ion beam with A/Z=1-3 and current up to 5 mA for proton and 0.4 pmA for light ions. The linac general layout will include two types of ion sources: ECR ion source for proton anf He ions and laser ion source for ions form Li to O. Following the LEBT ions will be bunched and accelerated to the final energy using RFQ section and 14 IH cavities. These IH-cavities will be identical (divided into two groups) and independently phased. All cavities will operate on 81 MHz. Results of the beam dynamics simulations and the cavities design will presented in the report.  
slides icon Slides TUB07 [5.210 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB07  
About • Received ※ 16 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 14 October 2021
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