JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - UNPB AU - Yamamoto, Y. ED - McIntosh, Peter ED - Burt, Graeme ED - Apsimon, Robert ED - Schaa, Volker R.W. TI - Successful Beam Operation at 33 MV/m in STF-2 Cryomodule at KEK for ILC J2 - Proc. of LINAC2022, Liverpool, UK, 28 August-02 September 2022 CY - Liverpool, UK T2 - International Linear Accelerator Conference T3 - 31 LA - english AB - 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 estimated from the beam energy with 7 cavities in Mar/2019. After that, one cavity with the lowest performance installed in CM2a was replaced with one nitrogen-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 nitrogen-infused cavity. This is the very important milestone for ILC. In this report, the detailed results will be presented. PB - JACoW Publishing CP - Geneva, Switzerland ER -