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Lifetime test and heritage on orbit of coolers for space use

Nakagawa, Takao; Mitsuda, Kazuhisa; Murakami, Masahide +11 more

This report describes the results and operating status of ground lifetime testing and achievements on orbit of coolers for space use. Ground lifetime tests of coolers of three types were conducted to demonstrate their long life and reliability. Three single-stage Stirling coolers were tested for 89,016, 71,871 and 68,273 h from 1998, a two-stage S…

Development of porous plug phase separator and superfluid film flow suppression system for the Soft X-ray Spectrometer onboard ASTRO-H

Yamaguchi, Hiroya; Ezoe, Yuichiro; Ishikawa, Kumi +10 more

ASTRO-H is the sixth Japanese astronomy satellite scheduled for launch in 2014. The Soft X-ray Spectrometer instrument is onboard ASTRO-H. This is a 6 × 6 array of X-ray microcalorimeters with an energy resolution of <7 eV at 0.5-10 keV. Superfluid liquid helium is utilized as a part of the cooling system. To retain the liquid helium in the tan…