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TY - CONF AU - Popielarski, J.T. AU - Chang, W. AU - Compton, C. AU - Hartung, W. AU - Kim, S.H. AU - Metzgar, E.S. AU - Miller, S.J. AU - Saito, K. AU - Schwartz, J.F. AU - Xu, T. ED - Yamazaki, Yoshishige ED - Raubenheimer, Tor ED - McCausey, Amy ED - Schaa, Volker RW TI - FRIB Tuner Performance and Improvement J2 - Proc. of NAPAC2019, Lansing, MI, USA, 01-06 September 2019 CY - Lansing, MI, USA T2 - North American Particle Accelerator Conference T3 - 4 LA - english AB - The Facility for Rare Isotope Beams (FRIB) is under construction at Michigan State University (MSU). The FRIB superconducting driver linac will accelerate ion beams to 200 MeV per nucleon. The driver linac requires 10⁴ quarter-wave resonators (QWRs, β = 0.041 and 0.085) and 220 half-wave resonators (HWRs, β = 0.29 and 0.54). The cryomodules for β = 0.041, 0.085, and 0.29 have been completed and certified; 32 out of 49 cryomodules are certified via bunker test (as of March 2019). FRIB QWR cavities have a demountable niobium tuning plate which uses a warm external stepper motor and the FRIB HWR cavities use pneumatic actuated bellows. Progress on the preparation and performance of the tuners is presented in this paper along with improvements made to ensure meeting frequency specification. PB - JACoW Publishing CP - Geneva, Switzerland SP - 755 EP - 758 KW - cavity KW - linac KW - cryomodule KW - controls KW - MMI DA - 2019/10 PY - 2019 SN - 2673-7000 SN - 978-3-95450-223-3 DO - doi:10.18429/JACoW-NAPAC2019-WEPLM70 UR - http://jacow.org/napac2019/papers/weplm70.pdf ER -