Abstract
The Brayton Circulating Cooling System is a unique refrigeration system designed to demonstrate the basic technology needed to provide cold helium gas refrigeration at high pressures to an external superconducting magnet or any remote load for cool down purposes. The system is designed to provide cool down refrigeration from room temperature to target minimum temperatures of approximately 40 K. The system consists of an F-70H helium compressor with gas control manifold, interconnecting gas lines, cables, the Brayton refrigeration unit mounted in a Dewar assembly and control system. The helium compressor uses high purity helium gas for its refrigerant. Electricity, cooling water for the compressor and a source of pure helium (99.995%) for make-up gas are the only required utilities. The scope of the project, system design, target specifications and summary of test results will be discussed in this paper.
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