Verifying the HETG spectrometer Rowland design

Michael D. Stage; Daniel Dewey

doi:10.1117/12.331261

19 November 1998 Verifying the HETG spectrometer Rowland design

Michael D. Stage, Daniel Dewey

Proceedings Volume 3444, X-Ray Optics, Instruments, and Missions; (1998) https://doi.org/10.1117/12.331261
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

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.

Citation Download Citation

Michael D. Stage and Daniel Dewey "Verifying the HETG spectrometer Rowland design", Proc. SPIE 3444, X-Ray Optics, Instruments, and Missions, (19 November 1998); https://doi.org/10.1117/12.331261

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