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Nakamura, N.

Paper Title Page
THPPO047 Development of Input Power Coupler for ERL Main Linac in Japan 684
 
  • H. Sakai, T. Furuya, S. Sakanaka, T. Takahashi, K. Umemori
    KEK, Ibaraki
  • A. Ishii, N. Nakamura, K. Shinoe
    ISSP/SRL, Chiba
  • M. Sawamura
    JAEA/ERL, Ibaraki
  
 

We started to develop an input coupler for a 1.3GHz ERL superconducting cavity. Required input power is about 20kW for the cavity acceleration field of 20MV/m and the beam current of 100 mA in energy recovery operation. The input coupler is designed based on the STF-BL input coupler and some modifications are applied to the design for the CW 20kW power operation. We fabricated input coupler components such as ceramic windows and bellows and carried out the high-power test of the components by using a 30kW IOT power source and a test stand constructed for the high-power test. In this report, we mainly describe the design strategy of the input coupler for the 1.3GHz CW superconducting cavity and results of the high-power test of ceramic window and bellows.