Author: Yamamoto, Y.
Paper Title Page
TH1PA03
Successful Beam Operation at 33 MV/m in STF-2 Cryomodule at KEK for ILC  
 
  • Y. Yamamoto
    KEK, Ibaraki, Japan
 
  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.  
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