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Proceedings Paper

Verifying the HETG spectrometer Rowland design
Author(s): Michael D. Stage; Daniel Dewey
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Paper Abstract

The HETGS on AXAF is the coordinated operation of the AXAF High-Resolution Mirror Assembly (HRMA), the high-energy transmission grating (HETG), and the grating-readout array of the AXAF CCD Imaging Spectrometer (ACIS-S). XRCF calibration data are analyzed to verify the Rowland geometry design of the HETGS. In particular, ACIS-S imaging of quadrant shutter focus test is used to probe the focus, alignment, and astigmatism of the spectra produced by diffraction through the high and medium energy gratings of the HETG. The experimental results are compared to expected values and to results obtained with the AXAF simulator, MARX.

Paper Details

Date Published: 19 November 1998
PDF: 12 pages
Proc. SPIE 3444, X-Ray Optics, Instruments, and Missions, (19 November 1998); doi: 10.1117/12.331261
Show Author Affiliations
Michael D. Stage, Massachusetts Institute of Technology (United States)
Daniel Dewey, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 3444:
X-Ray Optics, Instruments, and Missions
Richard B. Hoover; Arthur B. C. Walker II, Editor(s)

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