Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Development of High Current Shunt Regulator for Beam Based Alignment in PLS 2GeV Storage Ring

포항방사광가속기 빔위치 정렬 용 정밀전원장치 개발

  • Nam, S.H. (Pohang Accelerator Laboratory, POSTECH) ;
  • Suh, J.H. (Pohang Accelerator Laboratory, POSTECH) ;
  • Ha, K.M. (Pohang Accelerator Laboratory, POSTECH) ;
  • Huang, J.Y. (Pohang Accelerator Laboratory, POSTECH) ;
  • Ko, I.S. (Pohang Accelerator Laboratory, POSTECH)
  • 남상훈 (포항가속기연구소, 포항공과대학교) ;
  • 서재학 (포항가속기연구소, 포항공과대학교) ;
  • 하기만 (포항가속기연구소, 포항공과대학교) ;
  • 황정연 (포항가속기연구소, 포항공과대학교) ;
  • 고인수 (포항가속기연구소, 포항공과대학교)
  • Published : 1997.07.21
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Abstract

Total 144 quadrupole magnets are installed in PLS. The magnets are connected in series with groups of two or 24. Each group is powered by a high-precision constant-current DC power supply. For the purpose of the beam based alignment of beam position monitors in the PLS, it is necessary to adjust the current of each quadrupole independently. To achieve this, a high current shunt regulator is designed. It can shunt a maximum 50 A of the quadrupole magnet current. The shunt regulator is programmable and the current amplitude can be varied linearly with a 12-bit resolution. Power transistors are used in the current shunt regulator. The operation of transistors is in linear region. The RS232C protocol is used for remote control and status report of the shunt regulator to the main control centre of the PLS. Preliminary result indicates that the calibration accuracy of the beam position monitor can be achievable in less than $10{\mu}m$.

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