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TY - CONF AU - Doleans, M. AU - Afanador, R. AU - Ball, J.A. AU - Barnhart, D.L. AU - Blokland, W. AU - Crofford, M.T. AU - DeGraff, B. AU - Gold, S.W. AU - Hannah, B.S. AU - Howell, M.P. AU - Kim, S.-H. AU - Lee, S.W. AU - Mammosser, J.D. AU - McMahan, C.J. AU - Neustadt, T.S. AU - Saunders, J. AU - Stewart, S.E. AU - Strong, W.H. AU - Tyagi, P.V. AU - Vandygriff, D.J. AU - Vandygriff, D.M. ED - Yamazaki, Yoshishige ED - Facco, Alberto ED - McCausey, Amy ED - Schaa, Volker RW TI - Plasma Processing to Improve the Performance of the SNS Superconducting Linac J2 - Proc. of LINAC2016, East Lansing, MI, USA, 25-30 September 2016 C1 - East Lansing, MI, USA T2 - Linear Accelerator Conference T3 - 28 LA - english AB - An in-situ plasma processing technique has been developed at the Spallation Neutron Source (SNS) to improve the performance of the superconducting radio-frequency (SRF) cavities in operation. The technique uses a low-density reactive neon-oxygen plasma at room-temperature to improve the surface work function, to help removing adsorbed gases on the RF surface and to reduce its secondary emission yield. Recently, the plasma processing technique has been applied to one offline cryomodule and to two cryomodules in the linac tunnel. Improvement of the accelerating gradient has been observed in all three cryomodules. PB - JACoW CP - Geneva, Switzerland SP - 679 EP - 682 KW - plasma KW - cryomodule KW - linac KW - cavity KW - accelerating-gradient DA - 2017/05 PY - 2017 SN - 978-3-95450-169-4 DO - 10.18429/JACoW-LINAC2016-WE2A03 UR - http://jacow.org/linac2016/papers/we2a03.pdf ER -