A stainless-steel mandrel for slumping glass x-ray mirrors

Details A stainless-steel mandrel for slumping glass x-ray mirrors A stainless-steel mandrel for slumping glass x-ray mirrors

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spie.7437e..32g&link_type=abstract

Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV. Edited by Gubarev, Mikhail V.; O'Dell, Stephen L.; Jones, William D.; Kester,

Physics

Optics

Scientific paper

We have fabricated a precision full-cylinder stainless-steel mandrel at NASA Marshall Space Flight Center. The mandrel is figured for a 30-cm-diameter primary (paraboloid) mirror of an 840-cm focal-length Wolter-1 telescope. We have developed this mandrel for experiments in slumping-thermal forming at about 600°C-of glass mirror segments at NASA Goddard Space Flight Center, in support of NASA's participation in the International X-ray Observatory (IXO). Precision turning of stainless-steel mandrels may offer a low-cost alternative to conventional figuring of fusedsilica or other glassy forming mandrels. We report on the fabrication, metrology, and performance of this first mandrel; then we discuss plans and goals for stainless-steel mandrel technology.

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