Evaluation of a 4.5-K Closed-Cycle Refrigerator.
Abstract
Superconducting devices require ambient temperatures in the 4 to 15 K region. Unattended operation for periods of days to weeks require either large dewar systems or closed cycle refrigerators. The report describes the magnetic and vibration signatures below 500 Hz of one refrigerator, a 4.5 K superposition of a CTi 1020 Cryodine with a Joule-Thomson expansion valve. User comments are included in the discussion with the conclusion being that closed cycle refrigerators are unlikely to be compatible with Josephson detector devices, but interfacing with superconducting coils and cavities is not definitively ruled out.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1975
- Accession Number
- ADA015308
Entities
People
- John E. Cox
Organizations
- United States Naval Research Laboratory