Author: Parkhomchuk, V.V.
Paper Title Page
TUM11 Low Energy Electron Cooler for the NICA Booster 22
 
  • A.V. Bubley, M.I. Bryzgunov, V.A. Chekavinskiy, A.D. Goncharov, K. Gorchakov, I.A. Gusev, V.M. Panasyuk, V.V. Parkhomchuk, V.B. Reva, D.V. Senkov
    BINP SB RAS, Novosibirsk, Russia
  • A.V. Smirnov
    JINR, Dubna, Moscow Region, Russia
 
  The low energy electron cooler for the NICA booster has recently been installed at the booster ring of the NICA facility. The article describes results of various measurements obtained during its commissioning. Also some details of design and construction of the cooler are discussed.  
slides icon Slides TUM11 [3.933 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2017-TUM11  
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TUM13
Electron Cooling at COSY - Status and Perspectives  
 
  • V. Kamerdzhiev, A.J. Halama
    FZJ, Jülich, Germany
  • M.I. Bryzgunov, V.V. Parkhomchuk, V.B. Reva
    BINP SB RAS, Novosibirsk, Russia
  • T. Katayama
    Nihon University, Narashino, Chiba, Japan
 
  COSY, a COoler SYnchrotron and storage ring has been initially equipped with a low energy electron cooler. It was mainly used to improve the quality of the beams extracted to fixed-target experiments, to enable transverse stacking of polarized beams to be used with targets in the ring, and to improve the beam lifetime for internal experiments. In 2013 a high-energy e cooler covering the entire energy range of COSY was added. Since then high-energy e cooling has been demonstrated and dedicated cooling beam studies with dc and bunched proton beam have been carried out. Furthermore, the cooling process in presence of an internal cluster jet target continuously affecting the circulating beam was studied. We review the status of electron-cooling activities at COSY, present the latest experimental results, discuss problems encountered and possible cures, and provide insights into the activities envisaged for the next year.  
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TUM21 High Voltage Cooler NICA Status and Ideas 25
 
  • V.B. Reva, M.I. Bryzgunov, A.V. Bubley, A.D. Goncharov, N.S. Kremnev, V.M. Panasyuk, V.V. Parkhomchuk, V.A. Polukhin, A.A. Putmakov
    BINP SB RAS, Novosibirsk, Russia
 
  The new accelerator complex NICA is designed at the Joint Institute for Nuclear Research (JINR, Dubna, Russia) to do experiment with ion-ion and ion-proton collision in the range energy 1-4.5 GeV/u. The planned luminosity in these experiments is 1027cm-2c{-1}. This value can be obtained with help of very short bunches with small transverse size. This beam quality can be realized with electron and stochastic cooling at energy of the physics experiment. The subject of the report is the problem of the technical feasibility of fast electron cooling for collider in the energy range between 0.2 and 2.5 MeV. For the realization of the cooler device BINP team proposes the design that is like to COSY cooler. The main features of this design are the accelerating tube immersed in the magnetic field along the whole length and the strong magnetic field in the cooling section. The physics of electron cooling is based on the idea of the fast magnetized cooling when the ion interacts with Larmour circle and the cooling decrements are improved significantly. The cooling force at strong magnet field was measured at many experiments and can be surely estimated.  
slides icon Slides TUM21 [50.456 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2017-TUM21  
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TUP09 Project of High-Voltage System with Fast Changing Potential for DR Experiment 44
 
  • V.B. Reva, A.P. Denisov, V.V. Parkhomchuk, A.A. Putmakov, D.N. Skorobogatov
    BINP SB RAS, Novosibirsk, Russia
  • J. Li, X. Ma, L.J. Mao
    IMP/CAS, Lanzhou, People's Republic of China
 
  Funding: The reported study was partially funded by RFBR 16-52-53016.
A storage ring equipped with an electron cooler is an ideal platform for dielectronic recombination (DR)experiments. In order to fulfill the requirement of DR measurements the system of the precision control of the relative energy between the ion beam and the electron beam should be installed in the electron cooler device. This report describes the project of such system that is designed with section approach like COSY electron cooler. Each section consist of the section of cascade transformer and two power supplies for low and fast detuning of potential of high-voltage terminal. This project can be used in CSRe and future HIAF storage rings.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2017-TUP09  
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TUP19
Status Report about the HV Power Supply and its Test-bench for the HESR Electron Cooler  
 
  • I. Alexander, W. Klag
    IKP, Mainz, Germany
  • K. Aulenbacher, J. Dietrich
    HIM, Mainz, Germany
  • M.I. Bryzgunov, V.V. Parkhomchuk, V.B. Reva
    BINP SB RAS, Novosibirsk, Russia
 
  For an effective cooling at HESR electron energies between 2 MeV and 8 MeV are needed and continuous magnetic beam guidance from the gun to the collector is indispensable. In order to provide the necessary power for the magnet coils, several gas turbines are placed at different electrical potentials. The turbines can deliver a power of 5 kW and are operated with N2. The HV potentials are created by stacking power supplies (PS) that can produce a voltage of 600 kV. The group around V. V. Parkhomchuk at BINP has developed a prototype of the PS. Tests and improvements are ongoing until end of this year. As soon as the PS arrives at the HIM in Mainz, it will be assembled in a pressure vessel to ensure full operation capability. Various future projects could be realized. First, an electron gun could be attached to the PS to characterize different properties by electron beam. Secondly, an additional PS could be installed to increase the electron energy to 1.2 MeV. Thirdly, a gun and a collector could be attached to the PS and a magnetic structure for the beam recirculation could be mounted to demonstrate the feasibility of an electron cooler with the developed equipment.  
poster icon Poster TUP19 [2.078 MB]  
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