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Report No.

Development of input power coupler for ERL main linac

Sakai, Hiroshi*; Shinoe, Kenji*; Ishii, Atsushi*; Umemori, Kensei*; Sakanaka, Shogo*; Takahashi, Takeshi*; Furuya, Takaaki*; Sawamura, Masaru

We are developing a input coupler for the 1.3GHz 9-cell superconducting cavities to realize the ERL. Estimated input power is about 20kW for 20MV/m ERL operation. This coupler is based on the STF-BL input coupler, which adopts the TRISTAN type coaxial coupler, and some modifications are applied for the CW 20kW power operation. Now we are developing the high power coupler test stand to carry out the components test of the ceramic windows and bellows by using a 30kW IOT. In this paper, we report the design strategy of the input power coupler for ERL main linac and the recent status of the high power coupler test stand.



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