Journal of Astronomy and Space Sciences (Sep 2012)

Thermal Analysis of MIRIS Space Observation Camera for Verification of Passive Cooling

  • Duk-Hang Lee,
  • Wonyong Han,
  • Bongkon Moon,
  • Youngsik Park,
  • Woong-Seob Jeong,
  • Kwijong Park,
  • Dae-Hee Lee,
  • Jeonghyun Pyo,
  • Il-Joong Kim,
  • Min-Gyu Kim,
  • Toshio Matsumoto

DOI
https://doi.org/10.5140/JASS.2012.29.3.305
Journal volume & issue
Vol. 29, no. 3
pp. 305 – 313

Abstract

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We conducted thermal analyses and cooling tests of the space observation camera (SOC) of the multi-purpose infrared imaging system (MIRIS) to verify passive cooling. The thermal analyses were conducted with NX 7.0 TMG for two cases of attitude of the MIRIS: for the worst hot case and normal case. Through the thermal analyses of the flight model, it was found that even in the worst case the telescope could be cooled to less than 206°K. This is similar to the results of the passive cooling test (~200.2°K). For the normal attitude case of the analysis, on the other hand, the SOC telescope was cooled to about 160°K in 10 days. Based on the results of these analyses and the test, it was determined that the telescope of the MIRIS SOC could be successfully cooled to below 200°K with passive cooling. The SOC is, therefore, expected to have optimal performance under cooled conditions in orbit.

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