• J. Popielarski, J. Bierwagen, S. Bricker, S. Chouhan, C. Compton, J. DeLauter, K. Elliott, P. Glennon, W. Hartung, M. Hodek, M.J. Johnson, O.K. Kester, F. Marti, S.J. Miller, D. Morris, D. Norton, L. Popielarski, D.P. Sanderson, N.R. Usher, N. Verhanovitz, J.J. Vincent, J. Wlodarczak, R.C. York
  NSCL, East Lansing, Michigan

Michigan State University is developing cryomodules for two projects: a 3 MeV per nucleon superconducting linac for re-acceleration of exotic ions (ReA3, under construction, requiring 4 cryomodules), and a 200 MeV per nucleon driver linac for the Facility for Rare Isotope Beams (FRIB, under design, requiring 52 cryomodules). The first two ReA3 cryomodules contain a total of seven quarter-wave resonators for beta = 0.041 and five superconducting solenoids (9 T). These cryomodules have been fabricated and installed, with testing underway. The third ReA3 cryomodule (requiring eight QWRs for beta = 0.085 and three solenoids) is being fabricated. A fourth ReA3 module consisting of a single quarter-wave resonator will be used for matching. A prototype cryomodule for FRIB is being designed for two beta = 0.53 half-wave resonators and one solenoid. The experience so far with system performance of the cryomodules will be described in this paper. Topics will include cavity performance, magnetic shielding, microphonics, cavity tuning, input coupler performance, and thermal loads.