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Report No.

Development of superconducting spoke cavity for laser Compton scattered photon sources

Sawamura, Masaru; Hajima, Ryoichi; Nagai, Ryoji; Kubo, Takayuki*; Fujisawa, Hiroshi*; Iwashita, Yoshihisa*; Tongu, Hiromu*

We have launched a 5-year research program to develop superconducting spoke cavity for laser Compton scattered (LCS) photon sources. For realizing a wide use of LCS X-ray and $$gamma$$-ray sources in academic and industrial applications, we adopt 325-MHz super-conducting spoke cavity to electron beam drivers. The spoke cavity, originally invented for ion and proton acceleration, can be used for electron accelerators, in which we can make best use of features of spoke cavity: relative compactness in comparison with a TM cavity of the same frequency, robustness with respect to manufacturing inaccuracy due to its strong cell-to-cell coupling, couplers on outer conductor for the better packing in a linac, and so on. In this paper, we present our research plan and results of cavity shape optimization.



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