Selection of Cold Compressors for the Fermilab Tevatron

This paper discusses performance of a final prototype cold compressor and the specification and purchase of production units for the Fermilab Tevatron. Cold helium vapor compressors will be added to the satellite refrigeration system in order to operate the accelerator at higher beam energy. A final machine specification emerged from extensive prototype testing in actual Tevatron refrigerators. These tests resulted in a decision to use high speed turbomachines instead of reciprocating units. The choice was based on performance, size, maintenance requirements, and reliability. IHI Co., Ltd. was selected to provide a final prototype centrifugal machine. Thermodynamic as well as mechanical performance of this unit is described.