The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Okada, T. AU - Dohmae, T. AU - Hori, Y. AU - Kako, E. AU - Kamiya, J. AU - Konomi, T. AU - Kurosawa, S. AU - Saeki, T. AU - Sakai, H. AU - Takeishi, K. AU - Umemori, K. AU - Yamamoto, Y. ED - Schaa, Volker RW ED - Pei, Guoxi ED - Chin, Yong Ho ED - Fu, Shinian ED - Zhao, Ning TI - Improvement of Cavity Performance by Nitrogen Doping at KEK J2 - Proc. of LINAC2018, Beijing, China, 16-21 September 2018 CY - Beijing, China T2 - Linear Accelerator Conference T3 - 29 LA - english AB - Nitrogen doping experiments in single-cell and 3-cell niobium cavities were carried out at KEK. After annealing at 800 deg C for 3 hours, pure nitrogen gas with a pressure of 3 Pa for 20 minutes and 3 minutes were introduced for doping in a furnace in J-PARC, respectively. Removing surface in 5 um and 20 um by electropolishing were performed prior to the vertical tests, respectively. Increases of a quality factor at 2K and reduction of the BCS resistance with respect to an accelerating gradient were observed in both cavities. PB - JACoW Publishing CP - Geneva, Switzerland SP - 480 EP - 483 KW - cavity KW - ECR KW - SRF KW - solenoid KW - accelerating-gradient DA - 2019/01 PY - 2019 SN - 2226-0366 SN - 978-3-95450-194-6 DO - DOI: 10.18429/JACoW-LINAC2018-TUPO065 UR - http://jacow.org/linac2018/papers/tupo065.pdf ER -