Author: Lee, Y.S.
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WEPMN036 Design Study on a High Power RF Amplifier for the RFQ* 3009
 
  • M.-H. Chun, K.-H. Park, I.H. Yu
    PAL, Pohang, Kyungbuk, Republic of Korea
  • J. Bahng
    Kyungpook National University, Daegu, Republic of Korea
  • J.G. Hong, B.S. Lee, J.W. Ok, M. Won
    Korea Basic Science Institute, Busan, Republic of Korea
  • D.S. Kim, Y. Moon, M. Seo
    Dawonsys, Siheung-City, Republic of Korea
  • Y.S. Lee
    SKKU, Suwon, Republic of Korea
  
  Funding: Korea Basic Science Institute in Korea
The design of RF amplifier of 100 kW (CW) at 165MHz is studied for a Radio Frequency Quadruple (RFQ). The RFQ as a linear accelerator is used for acceleration of low energy beam to 500 keV/u at KBSI [1]. An RF amplifier is composed of a drive, an intermediate, and a final amplifier stage with power supplies. The intermediate amplifier (IPA) of 5 kW is designed with solid state amplifier modules, and the final amplifier is designed with a tetrode tube. The high voltage power supply for the tetrode provides the fine regulation of 15 kV at 10 A. The RF amplifier is operated by program logic controller (PLC) with interlocks, and a low level RF control for RFQ accelerator. This paper describes the present design study on the 100 kW RF amplifier.
"*" Supported by Korea Basic Science Institute in Korea 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPMN036  
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WEPMN043 The RF Stability of PLS-II Storage Ring RF System 3024
 
  • I.H. Yu, M.-H. Chun, M.H. Jeong, Y.D. Joo, H.-S. Kang, H.-G. Kim, H.J. Park, I.S. Park, Y.U. Sohn
    PAL, Pohang, Kyungbuk, Republic of Korea
  • Y.S. Lee
    SKKU, Suwon, Republic of Korea
  
  Funding: Minister of Science, ICT and Future Planing
The RF system for the Pohang Light Source (PLS) storage ring was greatly upgraded for PLS-II project of 400mA, 3.0GeV from 200mA, 2.5GeV. Three superconducting RF cavities with each 300kW maximum klystron amplifier were commissioned with electron beam in way of one by one during the last 3 years for beam current of 400mA to until March 2014. The RF system is designed to provide stable beam through precise RF phase and amplitude requirements to be less than 0.3% in amplitude and 0.3° in phase deviations. This paper describes the RF system configuration, design details and test results. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPMN043  
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