Pulse tube cooling capacity versus tilt angle: testing and design implications

Tran Tsan; Nicholas B. Galitzki; Kam Arnold; Logan Foote; Jacob Spisak; Grant Teply

doi:10.1117/12.2562009

13 December 2020 Pulse tube cooling capacity versus tilt angle: testing and design implications

Tran Tsan, Nicholas B. Galitzki, Kam Arnold, Logan Foote, Jacob Spisak, Grant Teply

Proceedings Volume 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X; 114532N (2020) https://doi.org/10.1117/12.2562009
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

Ground-based observatories across a wide range of wavelengths implement cryogenic cooling techniques to increase the sensitivity of cameras and enable low temperature receiver technologies. Commercial pulse tube cryocoolers (PTCs) are frequently used to provide 40 K and 4 K stages as thermal shells in cameras. However, PTC operation is dependent on gravity, giving rise to changes in cooling capacity over the operational tilt range of pointed telescopes. We present a study of the performance of a PTC designed to provide a cooling capacity of 2.0 W at 4.2 K and 55 W at 45 K (Cryomech PT420-RM) from 0 to 55 degrees away from vertical to probe capacity as a function of angle over a set of realistic thermal loading conditions. We also discuss the design implications for current and future cryogenic cameras.

Citation Download Citation

Tran Tsan, Nicholas B. Galitzki, Kam Arnold, Logan Foote, Jacob Spisak, and Grant Teply "Pulse tube cooling capacity versus tilt angle: testing and design implications", Proc. SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, 114532N (13 December 2020); https://doi.org/10.1117/12.2562009

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