Author: Trubnikov, G.V.
Paper Title Page
TUYCH01
 Application of the Beam Cooling Methods at the NICA Project  
 
  • G.V. Trubnikov, I.N. Meshkov, A.O. Sidorin, A.V. Smirnov, S. Yakovenko
    JINR, Dubna, Moscow Region, Russia
  • T. Katayama
    GSI, Darmstadt, Germany
  
  The Nuclotron-based Ion Collider fAcility (NICA) is a new accelerator complex being constructed at JINR aimed to provide experiments with colliding heavy ions up to Au for experimental study of hot and dense strongly interacting baryonic matter and search for possible signs of the mixed phase and critical endpoint in the centre-of-mass energy range sq.root(SNN) = 4-11 GeV. This facility includes new 3 MeV/u linac, 600 MeV/u booster synchrotron (Booster), upgraded superconducting (SC) synchrotron Nuclotron (4,5 GeV/u maximal kinetic energy for ions with Z/A = 1/3) and collider consisting of two vertically separated SC rings, which provide average luminosity of the order of 10e27cm2s1 at high energies. Beam cooling systems are proposed for elements of the NICA project. The Booster synchrotron will be equipped with an electron cooling system. Two beam cooling systems – stochastic and electron will be used in the collider rings. Parameters of the cooling systems, proposed scenario of operation and peculiarities of their design intended to achieve required beam parameters are presented in this report.  
slides icon Slides TUYCH01 [3.574 MB]  
 
TUYCH02 Beam Cooling at NICA Collider 53
 
  • T. Katayama
    GSI, Darmstadt, Germany
  • I.N. Meshkov, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
  
  At the NICA collider project it is planned to make collision of 24 short bunches, each containing around 109 197Au79+ ions, at the two colliding points in the ring. The operation energy is envisaged from 1 GeV/u to 4.5 GeV/u. To prepare such beam conditions, the beam cooling technique, stochastic and electron beam, is employed at the beam accumulation from the injector Nuclotron and the following short bunch formation stage. Rather long pulse beam could be injected and accumulated in the collider with use of barrier voltage and beam cooling. After the enough beam accumulation, typically 2.4·1010, the high voltage RF with harmonic number 24 is applied to the accumulated coasting beam as well as the beam cooling which allow us to make the required short bunch of around 1nsec rms bunch length. The equilibrium condition is attained after 100~200 sec cooling, with the balance of RF force, cooling effects, IBS diffusion and the space charge repulsion force. In the present paper, detailed simulation results of beam accumulation and short bunch formation with stochastic cooling and electron cooling are presented including the space charge effects.  
slides icon Slides TUYCH02 [6.065 MB]  
 
THAOR01 Superconducting Quadrupole Module System for the SIS100 Synchrotron 143
 
  • E.S. Fischer, O.K. Kester, J.P. Meier, A. Mierau, P. Schnizer, P.J. Spiller, K. Sugita
    GSI, Darmstadt, Germany
  • H.G. Khodzhibagiyan, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
  
  The SIS100 heavy ion synchrotron, the core machine of the FAIR complex, uses fast ramped superconducting magnets. As for its ancestor, the Nuclotron operational at JINR Dubna since 1993, its superconducting magnets are based on iron dominated design and coils made of Nuclotron type cables. The SIS100 magnets differ from the Nuclotron magnets in the following points: they are longer, the field aperture was enlarged and the field quality improved, its AC losses reduced. The coils have a lower hydraulic resistance and the operation current is doubled. These achievements were obtained in a R&D collaboration between JINR and GSI. Now in the realization phase GSI will procure and test the SIS100 dipole magnets, while JINR together with GSI will finalize the design of the quadrupoles units (consisting of one quadrupole and one corrector), procure, test and assemble them into doublets. We report on the status of the project, the scheme of the JINR-GSI collaboration for developing and manufacturing the SIS100 quadrupole modules and the steps required to achieve the start of the series production.  
slides icon Slides THAOR01 [4.337 MB]  
 
WEZCH03 Status of the Nuclotron 117
 
  • A.O. Sidorin, N.N. Agapov, A.V. Alfeev, V. Andreev, V. Batin, A.V. Butenko, D.E. Donets, E.D. Donets, A.V. Eliseev, V.V. Fimushkin, A.R. Galimov, E.V. Gorbachev, A. Govorov, E.V. Ivanov, V. Karpinsky, V.D. Kekelidze, H.G. Khodzhibagiyan, A. Kirichenko, A.G. Kobets, A.D. Kovalenko, O.S. Kozlov, N.I. Lebedev, I.N. Meshkov, V.A. Mikhailov, V. Monchinsky, S. Romanov, T.V. Rukoyatkina, N. Shurkhno, I. Slepnev, V. Slepnev, A.V. Smirnov, A. Sorin, G.V. Trubnikov, A. Tuzikov, B. Vasilishin, V. Volkov
    JINR, Dubna, Moscow Region, Russia
  • O.I. Brovko, D.E. Donets, A.V. Philippov
    JINR/VBLHEP, Dubna, Moscow region, Russia
  
  One of the goals of present Nuclotron development is to test operational modes, diagnostic and beam control equipment required for R&D of the NICA collider elements. Main achievement in this direction are descussed. Results of the last runs of the Nuclotron operation are presented.  
slides icon Slides WEZCH03 [3.582 MB]  
 
THAOR03 Status of the Design and Test of Superconducting Magnets for the NICA Project 149
 
  • H.G. Khodzhibagiyan, P.G. Akishin, A.V. Bychkov, A. Donyagin, A.R. Galimov, O.S. Kozlov, G.L. Kuznetsov, I.N. Meshkov, V.A. Mikhaylov, E.V. Muravieva, P.I. Nikitaev, A.V. Shabunov, A.V. Smirnov, A.Y. Starikov, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
  
  NICA is a new accelerator complex being under design and construction at Joint Institute for Nuclear Research in Dubna. The actual design and the main characteristics of superconducting magnets for the NICA booster and the NICA collider are given. The magnets are based on a cold window frame iron yoke and a single-layered superconducting winding made from a hollow NbTi composite superconductor cable cooled with forced two-phase helium flow. The first results of cryogenic tests of the magnets for the NICA project are presented.  
slides icon Slides THAOR03 [0.884 MB]  
 
MOPPA017 Collider of the NICA Accelerator Complex: Optical Structure and Beam Dynamics 278
 
  • O.S. Kozlov, A.V. Eliseev, H.G. Khodzhibagiyan, S.A. Kostromin, I.N. Meshkov, A.O. Sidorin, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
  
  Accelerator complex NICA, developed in VBLHEP JINR, must provide an ion-ion (Au79 +) and ion-proton collisions at energies of 1-4.5 GeV/u, as well as experiments on collisions of polarized proton-proton and deuteron-deuteron beams. The calculations of the optical properties of superconducting collider rings have been aimed to create appropriate conditions for the collisions of beams and obtaining the required luminosity parameters in the working range of energies. The collider characteristics and the beam dynamics have been worked out in most for ion-ion mode of the complex.  
 
TUPPB003 Progress in NICA Booster Design 310
 
  • A.S. Valkovich, O.S. Kozlov, I.N. Meshkov, V.A. Mikhaylov, A.O. Sidorin, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
  
  New collider facility NICA * is envisioned to be built at The Joint Institute of Nuclear Research. The work presented explores issues of correction system of the Booster Synchrotron. The optimal arrangement of Beam Position Monitors and Orbit Correctors along the ring was investigated in order to achieve decent quality of the orbit correction. The SVD properties of the orbit correction system are presented. Optimal arrangement of the sextupole lenses for the correction of chromaticity of the ring was obtained. The reduction of the dynamical aperture due to the presence of the sextupole lenses was minimized by means of proper choice of betatron phase advances between the lenses.
* Design and construction of Nuclotron-based Ion Collider fAcility (NICA), Conceptual design report, Editors I.Meshkov, A.Sidorin, JINR, Dubna, 2008 		 
 
TUPPB004 Development of Stochastic Cooling Technique for NICA Project 313
 
  • N. Shurkhno
    MSU, Moscow, Russia
  • A.G. Kobets, I.N. Meshkov, V.V. Seleznev, A.O. Sidorin, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
  • R. Stassen
    FZJ, Jülich, Germany
  
  The experiment on stochastic cooling at Nuclotron, initiated two years ago as a test bench for NICA collider, is progressing. Stochastic cooling system was constructed in 2011. Important results of runs performed at Nuclotron (December 2011 and March 2012) are the following: beam Shottky-noise in the energy range 0.5-4 GeV/u has been measured for deutron and carbon beams with new pick-up structure and methodology for notch-filter and system delay adjustments (open-loop measurements) have been tested. Afterwards the initial scheme was revised and significantly improved and now is being prepared for the experiment. This report presents the results of first stochastic cooling tests at Nuclotron, and further development of stochastic cooling system.  
 
TUPPB007 Transfer Channel from Booster to Nuclotron at the NICA Facility 322
 
  • G.A. Filatov, I.N. Meshkov, V.A. Mikhaylov, A.O. Sidorin, N.D. Topilin, G.V. Trubnikov, A. Tuzikov
    JINR, Dubna, Moscow Region, Russia
  
  In the last years the Nuclotron-based Ion Collider fAcility (NICA) project is developed at Joint Institute for Nuclear Research (JINR), Dubna, Russia. Important elements of the NICA are two synchrotrons: Booster and Nuclotron. Connection between these synchrotrons is provided with the transfer channel for heavy ions at energy of 600 MeV/u. The transfer channel includes a stripping station and charge separation system. General goal of the optic design is to minimize emittance at the exit of the channel. Magnetic system of the channel will be constructed using magnets of the Nuclotron type.  
 
TUPPB059 Low Energy Channel for Modernized LU-20 442
 
  • V. Aleksandrov, A. Govorov, V. Monchinsky, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
  
  The modernization of LU-20 accelerator expects change existing electrostatic for-injector on RFQ type pre-accelerator. Low energy channel of transportation of beams is offered from three sources of ions: ESIS, LIS and SPIon - to RFQ. Parameters of channel and results of numerical modeling on fitting beams parameters with acceptance of RFQ are presented.  
 
WEPPC012
 Progress in Booster Design in the NICA Project  
 
  • A.V. Butenko, A. Tuzikov
    JINR/VBLHEP, Dubna, Moscow region, Russia
  • H.G. Khodzhibagiyan, I.N. Meshkov, V.A. Mikhailov, G.V. Trubnikov, A.S. Valkovich
    JINR, Dubna, Moscow Region, Russia
  
  In the framework of the NICA project the new Booster lattice is designing. The NICA layout includes Electron String Ion Source, 3 Mev/u linac, 600 MeV/u booster synchrotron, upgraded Nuclotron and ion collider. The main goals of the Booster are the following: accumulation of 2*E9 Au32+ ions; acceleration of the heavy ions up to energy required for effective stripping; forming of the required beam emittance with electron cooling system. The present layout makes it possible to place the Booster having 211 m circumference and four fold symmetry lattice inside the yoke of the Synchrophasotron. The features of this booster, the requirement to the main synchrotron systems and their parameters are presented in this paper.  
 
WEPPD024 The Quench Detection System for Superconducting Elements of Nuclotron Acceleration Complex 605
 
  • A.O. Sidorin, E.V. Ivanov, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
  
  The system provides highly effective detection of quenches in superconducting elements of Nuclotron. Full information about quench element is transmitted to control room. Diagram of analogue quench signal could be displayed on screen for further analysis. The system performs scheduled self-test diagnostics in real time and controls power elements of energy evacuation.  
 
WEPPD039 Development of the New Control Systems for JINR e- Linac Accelerator Test-Bench 626
 
  • M.A. Nozdrin, N. Balalykin, V. Minashkin, V.Y. Schegolev, G. Shirkov, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
  
  Linear accelerator test-bench in the Joint Institute for Nuclear Research is based on the part of the accelerator complex which was transferred to the possession of JINR by the National Institute for Subatomic Physics (NIKHEF, Amsterdam). Analysis of the transferred accelerator equipment has shown that full re-engineering is required for its control systems; all other systems are in good condition and have considerable endurance. Results of development and creation of the Electron Gun Control System (EGCS), Video and Analog Signals Control System (VASCS) and Automatic System of Radiation Safety Control (ASRSC) are presented. These systems allowed achieving a commissioning of the first accelerator section of the bench with current of 3 mA in 1 us pulse and at beam energy of 23-25 MeV.  
 
MOBCH01 Storage, Acceleration and Short Bunched Beam Formation of 197Au+79 Ions in the NICA Collider 30
 
  • A.V. Eliseev, A.V. Smirnov
    JINR, Dubna, Moscow Region, Russia
  • T. Katayama
    GSI, Darmstadt, Germany
  • E. Kenzhbulatov, G.Y. Kurkin, V.M. Petrov, V. Volkov
    BINP SB RAS, Novosibirsk, Russia
  • O.S. Kozlov, A.O. Sidorin, G.V. Trubnikov
    JINR/VBLHEP, Dubna, Moscow region, Russia
  • I.N. Meshkov
    JINR/DLNP, Dubna, Moscow region, Russia
  
  The regimes of high intensity beam of 197Au79+ ions in NICA Collider is considered. The first stage – ion storage is proposed to be performed with Barrier Bucket technique at ion energy of 1–3 GeV/u. Experiments in collider mode in this energy range can be performed at injection energy. For experiments at higher, up to 4.5 GeV/u, energy ions are accelerated with the same BB method. Formation of bunched beam is fulfilled in two steps – first, at 24th harmonics and then, final formation, at 72th harmonics of RF system. The possibility of achievement of designed bunch parameters is shown.  
slides icon Slides MOBCH01 [0.807 MB]  
 
WEPPD042 Vacuum Automatic Control System (ACS) for NICA Project 635
 
  • R.V. Pivin, A.R. Galimov, H.G. Khodzhibagiyan, A.V. Smirnov
    JINR, Dubna, Moscow Region, Russia
  • A.M. Bazanov, A.V. Butenko, A. Nesterov, G.V. Trubnikov
    JINR/VBLHEP, Dubna, Moscow region, Russia
  • P. Hedbavny
    Pfeiffer Vacuum GmbH, Asslar, Germany
  
  Development of the automatic control vacuum system (ACVS) for NICA project was beginning. The first step of this work was Nuclotron vacuum system modernization. It were installed new vacuum pumps and gauges with RS-232, RS-485 and ProfiBus interfaces. Devices were combined to the net with central controller at Linac control room. The result of the modernization was creation of remote control, monitoring and automatic protective system. Next step of ACVS creation will be Linac vacuum system automatization. Experience of the Nuclotron vacuum system modernization will be applied for NICA ACVS development.