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@InProceedings{hartung:napac2019-moplo17, author = {W. Hartung and W. Chang and S.H. Kim and D. Norton and J.T. Popielarski and K. Saito and J.F. Schwartz and T. Xu and C. Zhang}, % author = {W. Hartung and W. Chang and S.H. Kim and D. Norton and J.T. Popielarski and K. Saito and others}, % author = {W. Hartung and others}, title = {{Large-Scale Dewar Testing of FRIB Production Cavities: Results}}, booktitle = {Proc. NAPAC'19}, pages = {270--273}, paper = {MOPLO17}, language = {english}, keywords = {cavity, cryomodule, SRF, MMI, linac}, venue = {Lansing, MI, USA}, series = {North American Particle Accelerator Conference}, number = {4}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {10}, year = {2019}, issn = {2673-7000}, isbn = {978-3-95450-223-3}, doi = {10.18429/JACoW-NAPAC2019-MOPLO17}, url = {http://jacow.org/napac2019/papers/moplo17.pdf}, note = {https://doi.org/10.18429/JACoW-NAPAC2019-MOPLO17}, abstract = {The Facility for Rare Isotope Beams (FRIB), under construction at Michigan State University (MSU), includes a superconducting driver linac to deliver ion beams at 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 jacketed resonators are Dewar tested at MSU before installation into cryomodules. The cryomodules for β = 0.041, 0.085, and 0.29 have been completed and certified; 89% of the β = 0.54 HWRs have been certified (as of May 2019). The Dewar certification tests have provided valuable information on the performance of production QWRs and HWRs at 4.3 K and 2 K and on performance limits. Results will be presented.}, }