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On-orbit thermal behaviour of the IRTS cryogenic system.

Author(s) : FUJII G., TOMOYA S., KYOYA M., HIRABAYASHI M., MURAKAMI M., MATSUMOTO T., HIRAO T., MURAKAMI H., OKUDA H., KANARI T.

Summary

The IRTS (Infrared Telescope in Space) was launched at 08:01 on 18 March 1995 UT. The thermal state reached the anticipated steady state at 1.91 K on the third day. The telescope aperture lid was ejected on day 11 after launch. A helium 3 refrigerator was then activated to decrease the temperature of some bolometer detectors down to 302 milliK for observations in the far infrared region. The stable thermal state of helium II at 1.91 K was maintained until the depletion of helium II at 09:30 on 24 April UT.

Details

  • Original title: On-orbit thermal behaviour of the IRTS cryogenic system.
  • Record ID : 1997-2661
  • Languages: English
  • Source: 1995 Space Cryogenics Workshop.
  • Publication date: 1996/10

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