Cycle design for the ISABELLE helium refrigerator
The superconducting magnets for the ISABELLE storage ring/accelerator are designed to be operated at 3.8/sup 0/K using a forced-flow supercritical helium cooling system. The ISABELLE refrigerator has been designed subject to these special requirements. The design output is 13.65 KW of refrigeration below 4.2/sup 0/K (for cooling the magnet and distribution system), 55 KW at 55/sup 0/K (to cool heat shields for the whole system) and 100 g/s of liquefaction (for magnet power leads cooling). The system incorporates a subcooler section that produces liquid helium at 5.3 atm and 2.6 K and circulates it through the loads, and a Claude-type main refrigerator section. The main refrigerator section has five stages of cooling, with four of them below liquid nitrogen temperature. Liquid nitrogen precooling is not used. With 60% isothermal compressors the efficiency of the refrigerator system will be about 26% of Carnot.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA); Koch Process Systems, Westborough, MA (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6291899
- Report Number(s):
- BNL-30006; CONF-810835-21; ON: DE81030551
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
43 PARTICLE ACCELERATORS
430400* -- Particle Accelerators-- Storage Rings
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
ISABELLE STORAGE RINGS
MAGNETS
OPERATION
PERFORMANCE
REFRIGERATORS
SPECIFICATIONS
STORAGE RINGS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
ULTRALOW TEMPERATURE