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Proceedings Paper

Platinum as a release layer for thermally formed optics for IXO
Author(s): S. Romaine; R. Bruni; P. Gorenstein; S. Park; P. Reid; B. Ramsey; T. Kester
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Paper Abstract

Platinum is being explored as an alternative to the sprayed boron nitride mandrel release coating under study at GSFC for the International X-ray Observatory (IXO). Two and three inch diameter, polished (PFS) and superpolished (SPFS) fused silica flat mandrels, were used for these tests. Pt was applied to the mandrels by DC magnetron sputtering. The substrate material was 400 micron thick D263 glass, the material which has been proposed for the IXO segmented optics. These substrates were placed on the mandrels and thermally cycled with the same thermal profile being used at GSFC in the development of the BN slumping for IXO. After the thermal cycle was complete, the D263 substrates were removed; new D263 substrates were placed on the mandrels and the process was repeated. Four thermal cycles have been completed to date. After initially coating the mandrels with Pt, no further conditioning was applied to the mandrels before or during the thermal cycles. The microroughness of the mandrels and of the D263 substrates was measured before and after thermal cycling. Atomic force microscopy (AFM) and 8 keV X-ray reflectivity data are presented.

Paper Details

Date Published: 30 July 2010
PDF: 6 pages
Proc. SPIE 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, 77323T (30 July 2010); doi: 10.1117/12.858109
Show Author Affiliations
S. Romaine, Harvard-Smithsonian Ctr. for Astrophysics (United States)
R. Bruni, Harvard-Smithsonian Ctr. for Astrophysics (United States)
P. Gorenstein, Harvard-Smithsonian Ctr. for Astrophysics (United States)
S. Park, Harvard-Smithsonian Ctr. for Astrophysics (United States)
P. Reid, Harvard-Smithsonian Ctr. for Astrophysics (United States)
B. Ramsey, NASA Marshall Space Flight Ctr. (United States)
T. Kester, NASA Marshall Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 7732:
Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray
Monique Arnaud; Stephen S. Murray; Tadayuki Takahashi, Editor(s)

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