Solopova, A.D. Forehand, D. Khabiboulline, T.N. Palczewski, A.D. LCLS-II Cavity Higher Order Modes Coupler Tuning Optimization and Challenges at Jefferson Lab JACoW Publishing Geneva, Switzerland 2226-0366 978-3-95450-194-6 10.18429/JACoW-LINAC2018-TUPO041 English 423-426 TUPO041 HOM cavity cryomodule vacuum target Contribution to a conference proceedings 2019 2019-01 https://doi.org/10.18429/JACoW-LINAC2018-TUPO041 http://jacow.org/linac2018/papers/tupo041.pdf LCLS-II is a new XFEL linac based on 1.3GHz SRF linac. Half of the LCLS-II cryomodules are being produced at Jefferson Lab. This paper summarizes the Higher Order Mode filter tuning challenges at Jefferson Lab and describes optimization of the procedure for a 9-cell Tesla type cavity and its integration into a cryomodule production line.