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 - CONF AU - Éozénou, F. AU - Baudrier, M. AU - Cenni, E. AU - Chouhan, V. AU - Fayette, E. AU - Hayano, H. AU - Ida, Y.I. AU - Ito, H. AU - Jullien, G. AU - Kato, S. AU - Kubo, T. AU - Maurice, L. AU - Monjushiro, H. AU - Nii, K. AU - Saeki, T. AU - Servouin, C. AU - Yamaguchi, T.Y. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Lesage, Ana ED - Schaa, Volker R.W. TI - Vertical Electro-Polishing of 704 MHz Resonators Using Ninja Cathode: First Results 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 - Vertical Electro-Polishing (VEP) of elliptical cavities using rotating Ninja cathodes (Marui Company patented technology) has continually been improved since 2012 and successfully applied for 1300MHz multicell ILC-type resonators. The goal of the presented study is to apply this technology to 704 MHz ESS-type resonators with both better Q₀ and accelerating gradients in mind. We intend to demonstrate the superiority of VEP compared to standard Buffer Chemical Polishing (BCP), for possible applications such as MYRRHA accelerator. We describe here the promising results achieved on β=0.86 single-cell cavity after 200 µm uniform removal. The cavity quenched at 27 MV/m without any heat treatment. The surface resistance achieved was less than 5nΩ at 1.8K. Substantial performance improvement is expected after heat treatment of the cavity and additional 20 µm VEP sequence. A cathode for 5-Cell ESS cavity is concomitantly under design stage. PB - JACoW Publishing CP - Geneva, Switzerland SP - 431 EP - 434 KW - cavity KW - cathode KW - niobium KW - experiment KW - linac DA - 2022/10 PY - 2022 SN - 2673-5504 SN - 978-3-95450-233-2 DO - doi:10.18429/JACoW-SRF2021-TUPCAV001 UR - https://jacow.org/srf2021/papers/tupcav001.pdf ER -