Fabrication status of the prototype spoke cavity for the JAEA-ADS linac

JAEA-ADSリニアック用試作スポーク空洞の製作状況

田村 潤; 近藤 恭弘   ; Yee-Rendon, B. ; 明午 伸一郎   ; 前川 藤夫  ; 加古 永治*; 梅森 健成*; 阪井 寛志*; 道前 武*

Tamura, Jun; Kondo, Yasuhiro; Yee-Rendon, B.; Meigo, Shinichiro; Maekawa, Fujio; Kako, Eiji*; Umemori, Kensei*; Sakai, Hiroshi*; Domae, Takeshi*

The Japan Atomic Energy Agency (JAEA) has proposed an accelerator-driven system (ADS) to efficiently reduce high-level radioactive waste generated at nuclear power plants. As a first step toward the full-scale design of the CW proton linac for the JAEA-ADS, we are now prototyping a low-beta (around 0.2) single spoke cavity. In 2021, we have started welding the cavity parts together. By preliminarily investigating the optimum welding conditions, each cavity part was joined with a smooth welding bead. Consequently, we have succeeded to fabricate the body section of the prototype spoke cavity. In this meeting, the assembling status of the prototype spoke cavity is presented.