加速器
Online ISSN : 2436-1488
Print ISSN : 1349-3833
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ILCに向けたSTF-2クライオモジュールによる33 MV/mでのビーム加速実証
山本 康史福田 将史松本 利広森川 祐
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2021 年 18 巻 3 号 p. 143-150

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In STF at KEK, as the operational demonstration of the SRF accelerator for ILC, the STF-2 cryomodules (CM1+CM2a: one and half size CM with 12 cavities) have achieved 33 MV/m as average accelerating gradient with 7 cavities in Mar/2019. After that, one cavity with the lowest performance installed in CM2a was replaced with one N-infused cavity developed for High-Q/High-G R&D between Japan and US. From Apr/2021, the beam operation started again and those CMs achieved 33 MV/m as average accelerating gradient with 9 cavities including one N-infused cavity again. This is remarkably important milestone for the ILC project. In this report, the detailed results will be presented.

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