Contamination evaluation and control for SOLAR-B optical telescope

Details Contamination evaluation and control for SOLAR-B optical telescope Contamination evaluation and control for SOLAR-B optical telescope

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002rnaoj...6...49t&link_type=abstract

Report of the National Astronomical Observatory of Japan (ISSN 0915-6321), Vol. 6, No. 1, p. 49 - 58 (2002)

Astronomy and Astrophysics

Astronomy

1

Space Telescopes, Contamination

Scientific paper

In space telescopes, the deposition of molecular outgassing from its component parts may degrade the mirror reflectivity. In the case of the SOLAR-B visible light telescope, the molecular contamination is even more threatening since the deposited contaminants, when illuminated by the ultraviolet light from the sun, not only blacken but also promote further deposition. We thus started an extensive program to measure outgassing from all the non-metal material candidates to be used of the SOLAR-B telescope and to evaluate various chemical-cleaning (de-oil) procedures for the metal parts. The evaluation is based on NASA-MSFC-SPEC-1238 specification, and Thermoelectric Quartz Crystal Microbalance is the primary apparatus for the measurement. We are able to select the best possible adhesives and de-oil procedures for the flight model, whenever there are multiple choices. Conditions for the flight-model vacuum bakeout will also be established based on the measurements. The program significantly mitigates the risk due to molecular contamination the SOLAR-B program.

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