• E.P. Chojnacki, S.S. Chapman, R.D. Ehrlich, E.N. Smith, V. Veshcherevich
  CLASSE, Ithaca, New York

The proposed Cornell Energy Recovery Linac (ERL) will be a 5 GeV, 100 mA cw electron accelerator using SRF Cavities. The cryomodule design will be an extension of TTF technology. The cryogenic plant will be a significant portion of the ERL cost and an accurate estimate of the heat load is crucial to facility planning. A prototype main linac cryomodule is in the process of being designed. The configuration of the major module components is sufficiently known to allow calculation of the cryogenic heat loads to the helium cooling circuits of 1.8K, 5K, and an intermediate temperature in the vicinity of 80K. The results of ANSYS thermal modeling with nonlinear material properties will be presented along with analytic calculations to provide an itemization of the cryomodule heat loads. The optimal intermediate temperature will be shown to be just above 80K. The wall-plug power for the cryoplant will be estimated with COP’s provided by major helium-refrigeration vendors.