ROSAT Experience On X-Ray Optics Contamination

Hans Hartmann; Roland Nord; Helmut Schwille; Edgar Bachor

doi:10.1117/12.964912

1 January 1986 ROSAT Experience On X-Ray Optics Contamination

Hans Hartmann, Roland Nord, Helmut Schwille, Edgar Bachor

Proceedings Volume 0733, Soft X-Ray Optics and Technology; (1986) https://doi.org/10.1117/12.964912
Event: Soft X-Ray Optics and Technology, 1987, Berlin, Germany

Abstract

The different contamination control measures and monitors for the X-ray satellite ROSAT are described. Results are shown for cleanliness monitoring on ground and in vacuum test by Quartz Crystal Microbalance (QCM) and by analysis of witness mirror samples with Secondary Ion Mass Spectrometry (SIMS) and X-ray reflection measurements. Some unexpected contamination effects have had considerable impacts onto contamination control measures, especially onto specification of contamination witness samples, and they requested intense efforts with respect to contamination analysis. These investigations showed that there are considerable impurities of hydrocarbons trapped within the evaporated gold layers, caused by residual hydrocarbons in the evaporation facility or resulting from an unusually high affinity to hydrocarbon contamination compared to bulk gold. The latter may be stimulated by structural properties of the evaporated gold layer.

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Hans Hartmann, Roland Nord, Helmut Schwille, and Edgar Bachor "ROSAT Experience On X-Ray Optics Contamination", Proc. SPIE 0733, Soft X-Ray Optics and Technology, (1 January 1986); https://doi.org/10.1117/12.964912

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