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New Methods for Thin Film Deposition and First Investigations of the use of High Temperature Superconductors for Thin Film Cavities

Gustafsson, A.E., Calatroni, S., Wollenberg, W. and Seviour, Rebecca (2010) New Methods for Thin Film Deposition and First Investigations of the use of High Temperature Superconductors for Thin Film Cavities. In: Proceedings of the 1st International Particle Accelerator Conference IPAC 2010. JACoW, Kyoto, Japan, pp. 2995-2997. ISBN 978-92-9083-352-9

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    Abstract

    Nio­bi­um thin film cav­i­ties have shown good and re­li­able per­for­mance for LEP and LHC, al­though there are lim­i­ta­tions to over­come if this tech­nique should be used for new ac­cel­er­a­tors such as the ILC. New coat­ing tech­niques like High Power Im­pulse Mag­netron Sput­ter­ing (HiP­IMS) has shown very promis­ing re­sults and we will re­port on its pos­si­ble im­prove­ments for Nb thin film cav­i­ty per­for­mance. Cur­rent ma­te­ri­als used in ac­cel­er­a­tor SRF tech­nolo­gies op­er­ate at tem­per­a­tures below 4 K, which re­quire com­plex cryo­genic sys­tems. Re­searchers have in­ves­ti­gat­ed the use of High Tem­per­a­ture Su­per­con­duc­tors (HTS) to form RF cav­i­ties, with lim­it­ed suc­cess*. We pro­pose a new ap­proach to achieve a high-tem­per­a­ture SRF cav­i­ty based on the su­per­con­duct­ing 'prox­im­i­ty ef­fect'**. The su­per­con­duct­ing prox­im­i­ty ef­fect is the ef­fect through which a su­per­con­duct­ing ma­te­ri­al in close prox­im­i­ty to a non-su­per­con­duct­ing ma­te­ri­al in­duces a su­per­con­duct­ing con­den­sate in the lat­ter. Using this ef­fect we hope to over­come the prob­lems that have pre­vent­ed the use of HTS for ac­cel­er­at­ing struc­tures so far. We will re­port the pre­lim­i­nary stud­ies of mag­netron sput­tered thin films of Cu on Nb

    Item Type: Book Chapter
    Subjects: Q Science > Q Science (General)
    Q Science > QC Physics
    Schools: School of Applied Sciences
    Related URLs:
    Depositing User: Sara Taylor
    Date Deposited: 08 Nov 2012 15:25
    Last Modified: 08 Nov 2012 15:48
    URI: http://eprints.hud.ac.uk/id/eprint/15973

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