The X-ray and Cryogenic Facility (XRCF) at the NASA Marshall Space
Flight Center (MSFC) is the baselined facility for X-ray testing of
the Athena X-ray optics. Here we give an overview of the planned
testing, including the XRCF facility and its 500-meter X-ray
beamline, the required facility X-ray sources and detectors,
testing requirements, and the GSE required for X-ray testing and
calibration of the Athena mirror assembly module demonstrator (MAMD),
the qualification model mirror (QM), and the flight model mirror (FM).
Of special interest is the metrology system needed for the
calibration: because the large Athena optic (the Mirror Assembly
Module, or MAM) is too large for full illumination in the XRCF 1.5m
diameter X-ray beam, the six sectors of the MAM will be tested
separately, requiring precise knowledge of the optic and detector
positions during the calibration to enable the stitching together of
the full MAM point spread function from measurements of the individual
sectors.
|