Simple and rapid cooldown of detector elements to temperatures as low as 77K is possible through the use of R. G. Hansen & Associates fixed orifice cryostats. Our cryostats convert pressurized gasses to cryogen directly in an appropriately designed dewar.
Gas Supply Heat Load Temperature
   The gas supply to the  cryostat is normally commercial, high-purity, extra-dry, water-pumped  nitrogen, MIL-N-6011, Grade A. Other  gases such as Argon (87K), Freon 14 (145K) or Freon 13 (192K) may be used without modification to the cryostat; for maximum efficiency, however, custom modifications to our standard cryostat are required when using coolants other than nitrogen gas Successful operation with
detector/dewar package heat loads of 2 watts or less may be expected when Nitrogen gas is used. Capacities to 5 watts and more are possible with the other gases and custom cryostats.
  The fixed orifice cryostat will operate successfully over a wide range of ambient temperatures; -55° to 70° C is usual.
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R. G. Hansen & Associates
631 Chapala Street
Santa Barbara, California 93101
ph (805) 564-3388
fax (805) 963-0733
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