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 - Turner, D.A. AU - Burt, G. AU - Chyhyrynets, E. AU - Dumbell, K.D. AU - Junginger, T. AU - Leith, S.B. AU - Malyshev, O.B. AU - Medvids, A. AU - Onufrijevs, P. AU - Pira, C. AU - Ries, R. AU - Seiler, E. AU - Sublet, A. AU - Valizadeh, R. AU - Vogel, M. AU - Wilson, J.T.G. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Lesage, Ana ED - Schaa, Volker R.W. TI - Magnetic Field Penetration of Niobium Thin Films Produced by the ARIES Collaboration 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 - Superconducting (SC) thin film coatings on Cu substrates are already widely used as an alternative to bulk Nb SRF structures. Using Cu allows improved thermal stability compared to Nb due to having a greater thermal conductivity. Niobium thin film coatings also reduce the amount of Nb required to produce a cavity. The performance of thin film Nb cavities is not as good as bulk Nb cavities. The H2020 ARIES WP15 collaboration studied the impact of substrate polishing and the effect produced on Nb thin film depositions. Multiple samples were produced from Cu and polished with various techniques. The polished Cu substrates were then coated with a Nb film at partner institutions. These samples were characterised with surface characterisation techniques for film morphology and structure. The SC properties were studied with 2 DC techniques, a vibrating sample magnetometer (VSM) and a magnetic field penetration (MFP) facility. The results conclude that both chemical polishing and electropolishing produce the best DC properties in the MFP facility. A comparison between the VSM and the MFP facility can be made for 10 micron thick samples, but not for 3 micron thick samples. PB - JACoW Publishing CP - Geneva, Switzerland SP - 77 EP - 81 KW - cavity KW - dipole KW - site KW - SRF KW - controls DA - 2022/10 PY - 2022 SN - 2673-5504 SN - 978-3-95450-233-2 DO - doi:10.18429/JACoW-SRF2021-SUPFDV007 UR - https://jacow.org/srf2021/papers/supfdv007.pdf ER -