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TY - CONF AU - Verdú-Andrés, S. AU - Baurac, S. AU - Boulware, C.H. AU - Clemens, W.A. AU - Grimm, T.L. AU - McEwen, E.A. AU - Park, H. AU - Ratti, A. AU - Skaritka, J. AU - Wu, Q. AU - Yancey, J.A. ED - Schaa, Volker RW ED - Arduini, Gianluigi ED - Pranke, Juliana ED - Seidel, Mike ED - Lindroos, Mats TI - Trim Tuning of SPS-Series DQW Crab Cavity Prototypes J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017 C1 - Copenhagen, Denmark T2 - International Particle Accelerator Conference T3 - 8 LA - english AB - The final steps in the manufacturing of a superconducting RF cavity involve careful tuning before the final welds to match the target frequency as fabrication tolerances may introduce some frequency deviations. The target frequency is chosen based on analysis of the shifts induced by remaining processing steps including acid etching and cool down. The baseline fabrication of a DQW crab cavity for the High Luminosity LHC (HL-LHC) envisages a first tuning before the cavity subassemblies are welded together. To produce a very accurate final result, subassemblies are trimmed to frequency in the last machining steps, using a clamped cavity assembly for RF measurements. This paper will describe the trim tuning of one of the SPS prototype DQW crab cavities fabricated by Niowave. PB - JACoW CP - Geneva, Switzerland SP - 1187 EP - 1189 KW - cavity KW - target KW - operation KW - simulation KW - controls DA - 2017/05 PY - 2017 SN - 978-3-95450-182-3 DO - 10.18429/JACoW-IPAC2017-MOPVA143 UR - http://jacow.org/ipac2017/papers/mopva143.pdf ER -