Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005rnaoj...8...21t&link_type=abstract
Report of the National Astronomical Observatory of Japan (ISSN 0915-6321), Vol. 8, No. 1 - 2, p. 21 - 28 (2005)
Astronomy and Astrophysics
Astronomy
X-Ray Telescopes, Solar Space Telescopes
Scientific paper
In the development of space telescopes, we are concerned about molecular outgassing materials from telescope components. In particular, for solar telescopes in space, the deposition of the outgassing materials may lead to the increase of solar absorptance at a mirror surface and it causes the thermal distortion due to the resultant temperature increase. The mirror reflectivity at vacuum ultraviolet wavelengths is very sensitive to molecular contamination. We have extensively evaluated reflectance at 121.6nm (Lyman-alpha) of the contamination witness mirrors exposed to the telescope testing environments in the SOLAR-B visible-light telescope program. Thermal vacuum bakeout of flight components is very effective process to reduce the outgassing rate. We have severe contamination control program during the assembly and testing of the SOLAR-B telescope up to launch of the satellite.
Hara Hirohisa
Ichimoto Kiyoshi
Kano Ryouhei
Kumagai Kazuyoshi
Nakagiri Masao
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