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Final Results of the Ball AMSD Beryllium MirrorThe 1.4-meter semi-rigid, beryllium Advanced Mirror System Demonstrator (AMSD) mirror completed initial cryogenic testing at Marshall's X-ray Calibration Facility (XRCF) in August of 2003. Results of this testing show the mirror to have very low cryogenic surface deformation and possess exceptional figure stability. Subsequent to this cryogenic testing beryllium was selected as the material of choice for the James Webb Space Telescope (JWST) multi-segment primary mirror. Therefore, the AMSD mirror was sent back to SSG-Tinsley for additional ambient polishing to JWST requirements. The mirror was successfully polished to less than 22nm rms of low frequency error. Those additional results are presented with comparisons to the JWST requirements.
Document ID
20040121082
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Chaney, David M. (Ball Aerospace and Technologies Corp. Boulder, CO, United States)
Date Acquired
August 22, 2013
Publication Date
January 1, 2004
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Technology Days in the Government
Location: Huntsville, AL
Country: United States
Start Date: August 17, 2004
End Date: August 19, 2004
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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