Author: Shurkhno, N.
Paper Title Page
TUX03
 Control of Stochastic Cooling Systems  
 
  • N. Shurkhno
    FZJ, Jülich, Germany
  
  Adjustment of stochastic cooling systems is tedious and time-consuming process, but at the same time it is straightforward and in principle could be made fully automatic. The basic parameters one should consider to set-up a stochastic cooling system are system delay and gain, and optionally a notch-filter’s frequency and attenuation. With proper algorithms the adjustment and control of these parameters could be done to the best accuracy and speed, and proper system layout could allow for maintaining the adjustment during system operation without maintenance stops or beam disturbance. This report presents the developed approach for the automation of control and adjustment of stochastic cooling systems.  
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FRX01 Recent Developments and Experimental Results From Electron Cooling of a 2.4 GeV/c Proton Beam at COSY 72
 
  • P.J. Niedermayer, A.J. Halama, V. Kamerdzhiev, N. Shurkhno, R. Stassen
    FZJ, Jülich, Germany
  • T. Katayama
    Nihon University, Narashino, Chiba, Japan
  • V.B. Reva
    BINP SB RAS, Novosibirsk, Russia
  
  The COSY control system as well as other subsystems are being upgraded. The 2 MeV electron cooler was recently extended with the EPICS control system and thereby integrated into the control and data acquisition system of the Cooler Synchrotron COSY. Taking advantages of the new software capabilities, studies of transverse and longitudinal magnetized electron cooling of a proton beam at 2.4 GeV/c were carried out. Electron and stochastic cooling were combined to reduce the cooling time while achieving lowest possible emittance and momentum spread. Results from experiments are discussed including cooling dynamics during operation of an internal cluster-jet target designed for the PANDA experiment at HESR. We present the results of probing the electron velocity distribution by means of the strongly cooled beam itself. The shape of the measured distibution may be caused by the galloping/scalloping effects within the electron beam. This effect plays a significant role in the strong dependence of the longitudinal and transverse electron cooling process on the proton beam size. Also discussed are the technical developments, achievements and further plans regarding the control system upgrade.  
slides icon Slides FRX01 [4.424 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-FRX01  
About • paper received ※ 21 September 2019       paper accepted ※ 18 October 2019       issue date ※ 01 November 2019  
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TUPS18 Phase Step Method for Friction Force Measurement in Filter Stochastic Cooling 119
 
  • I.V. Gorelyshev, A.O. Sidorin
    JINR/VBLHEP, Dubna, Moscow region, Russia
  • V.V. Filimonov, A.V. Shemchuk
    JINR, Dubna, Moscow Region, Russia
  • I.V. Gorelyshev, A.O. Sidorin
    Saint Petersburg State University, Saint Petersburg, Russia
  • N. Shurkhno, R. Stassen
    FZJ, Jülich, Germany
  
  Voltage step method for friction force measurement in electron cooling is well known. The similar method for friction force measurement in longitudinal stochastic cooling with comb filter is provided. First test of the method during the run at COSY has been implemented.  
poster icon Poster TUPS18 [0.750 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-TUPS18  
About • paper received ※ 06 October 2019       paper accepted ※ 21 October 2019       issue date ※ 01 November 2019  
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