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Low cost microminiature refrigerators for large unit volume applicationsPhotolithographic techniques were employed to fabricate small Joule-Thomson refrigerators in laminated substrates. The gas passages of a J-T refrigerator are formed by etching channels as narrow as 50 microns and as shallow as 5 microns in glass plates which are laminated together. Circular refrigerators on the order of 1.5 centimeters in diameter and .75 millimeters thick were produced which cool down to cryogenic temperatures in a few seconds, using Argon or Nitrogen, with no vacuum or radiation insulation. Smaller refrigerators are developed for both faster cooldown and low refrigeration capacity applications. By using this technology, custom refrigerators can be designed to meet specific application requirements.
Document ID
19840007288
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Duboc, R. M., Jr.
(MMR Technologies, Inc. Mountain View, CA, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1983
Publication Information
Publication: NASA. Goddard Space Flight Center Refrig. for for Cryogenic Sensors
Subject Category
Engineering (General)
Accession Number
84N15356
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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