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 - Romanenko, A.S. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Lesage, Ana ED - Schaa, Volker R.W. TI - Cavity Performance Limitations Understanding via SIMS Studies of Cavity Cutouts J2 - Proc. of SRF2021, East Lansing, MI, USA, 28 June-02 July 2021 CY - East Lansing, MI, USA T2 - International Conference on RF Superconductivity T3 - 20 LA - english AB - The performance limitations of the modern SRF cavities are related to the near-surface cavity material structure, including the distribution of interstitial impurities such as hydrogen, oxygen, and nitrogen. The most direct way to connect the observed quality factors and achievable gradients to the material structure is to analyze the cavity cutouts using the most suitable analytical instruments and technique. In this contribution I will present the most recent insight gained from such studies using the state-of-the-art time of flight secondary ion mass spectroscopy (TOF-SIMS) on cutouts from the highest gradient-performing cavities, as well as the cavities prepared with the "mid-T" bake. The origins of the observed cavity behavior will be discussed. PB - JACoW Publishing CP - Geneva, Switzerland ER -