Design of the XRS Helium Insert
The X-Ray Spectrometer (XRS) instrument has gone through numerous iterations, first as an instrument on NASA’s Advanced X-Ray Astrophysics Facility (AXAF), then on AXAF-S, and now scheduled to fly on the Japanese Astro-E satellite. The Astro-E XRS is a high precision x-ray spectrometer with better than 20 eV resolution for x-ray energies from 0.3 to 10 keV. The requirement to obtain a lifetime greater than two years within the weight constraints of Astro-E has presented quite a challenge in the design of the cryogenic system. The design of the superfluid helium insert is described, with emphasis on innovative approaches taken to meet the requirements.
KeywordsTitanium Dust Graphite Helium Epoxy
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- 1.S.R. Breon, R.A. Hopkins, and S.J. Nieczkoski, The X-Ray Spectrometer-A cryogenic instrument on the Advanced X-Ray Astrophysics Facility, Adv in Cryo Engr 37:1193 (1992).Google Scholar
- 2.S.R. Breon and R.A. Hopkins, The new X-Ray Spectrometer--A revamped cryogenic instrument for the restructured AXAF-S mission, Adv in Cryo Engr 39:187 (1994).Google Scholar
- 3.S.M. Volz, K. Mitsuda, H. Inoue, and Y. Ogawara, M. Kyoya, M. Hirabayashi, The X-Ray Spectrometer (XRS)-A multi-stage cryogenic instrument for the Astro-E x-ray astrophysics mission, To be presented at the 1995 Space Cryogenics Workshop.Google Scholar
- 4.S. R. Breon, J.A. Gibbon, M.J. DiPirro, B.A. Warner, and J.G. Tuttle, Thermal design of the XRS helium cryostat, To be presented at the 1995 Space Cryogenics Workshop.Google Scholar
- 5.A.T. Serlemitsos, M. SanSebastian, E.S. Kunes, J. Geagan, and J.E. Marketon, Performance of the XRS/Astro-E engineering model ADR, To be presented at the 1995 Space Cryogenics Workshop.Google Scholar
- 6.R.L. Kelley, R J. Brekosky, J.D. Gygax, and S.D. Murphy, The microcalorimeter detector assembly for the Astro-E x-ray astrophysics mission, To be presented at the 1995 Space Cryogenics Workshop.Google Scholar
- 7.G. Fujii, S. Tomoya, M. Kyoya, M. Hirabayashi, M. Murakami, H. Okuda, H. Murakami, and T. Matsumoto, Thermal and mechanical performance of superfluid helium dewar for IRTS, Adv in Cryo Engr, 37:1359(1992).Google Scholar
- 8.Ralph H. Haycock, A cryogenic vacuum valve for use in space, Report CSE 87–007, National Technical Information Service (1987).Google Scholar