Design and performance of a portable 3He cryogenic system for ground based instrumentation

Details Design and performance of a portable 3He cryogenic system for ground based instrumentation Design and performance of a portable 3He cryogenic system for ground based instrumentation

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999rsci...70.4088v&link_type=abstract

Review of Scientific Instruments, Volume 70, Issue 10, pp. 4088-4096 (1999).

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Ground-Based Ultraviolet, Optical And Infrared Telescopes, Photoconductors And Bolometers, Cryogenics, Refrigerators, Low-Temperature Detectors, And Other Low-Temperature Equipment, Bolometers, Infrared, Submillimeter Wave, Microwave, And Radiowave Receivers And Detectors, Imaging Detectors And Sensors, Superconducting Infrared, Submillimeter And Millimeter Wave Detectors

Scientific paper

The availability of compact cryogenic refrigerators is of importance for the development of both ground and space-borne instrumentation based on cryogenic detectors. In this article we report on the design and performance of a complete ground based cryogenic system consisting of a 3He cryosorption refrigerator, and designed to cool a 6×6 element detector array of tantalum based superconducting tunnel junctions (STJs). The refrigerator provides an operating temperature of 330 mK, with a hold time in excess of 7 h. The system is designed to be portable, to provide a very stable focal plane, and to minimize the use of magnetic materials. Such a system has been used to host the focal plane assembly of S-Cam, the first optical camera for ground based astronomy utilizing an array of STJs, recently installed at the William Herschel Telescope, in La Palma.

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