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Proceedings Paper

Designing the x-ray microcalorimeter spectrometer for optimal science return
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Paper Abstract

Recent advances in X-ray microcalorimeters enable a wide range of possible focal plane designs for the X-ray Microcalorimeter Spectrometer (XMS) instrument on the future Advanced X-ray Spectroscopic Imaging Observatory (AXSIO) or X-ray Astrophysics Probe (XAP). Small pixel designs (75 μm) oversample a 5-10″ PSF by a factor of 3-6 for a 10 m focal length, enabling observations at both high count rates and high energy resolution. Pixel designs utilizing multiple absorbers attached to single transition-edge sensors can extend the focal plane to cover a significantly larger field of view, albeit at a cost in maximum count rate and energy resolution. Optimizing the science return for a given cost and/or complexity is therefore a non-trivial calculation that includes consideration of issues such as the mission science drivers, likely targets, mirror size, and observing efficiency. We present a range of possible designs taking these factors into account and their impacts on the science return of future large effective-area X-ray spectroscopic missions.

Paper Details

Date Published: 26 September 2013
PDF: 10 pages
Proc. SPIE 8859, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVIII, 885903 (26 September 2013); doi: 10.1117/12.2024423
Show Author Affiliations
Andrew Ptak, NASA Goddard Space Flight Ctr. (United States)
Simon R. Bandler, NASA Goddard Space Flight Ctr. (United States)
Univ. of Maryland, College Park (United States)
Jay Bookbinder, Smithsonian Astrophysical Observatory (United States)
Richard L. Kelley, NASA Goddard Space Flight Ctr. (United States)
Robert Petre, NASA Goddard Space Flight Ctr. (United States)
Randall K. Smith, Smithsonian Astrophysical Observatory (United States)
Stephen Smith, NASA Goddard Space Flight Ctr. (United States)
Univ. of Maryland, Baltimore County (United States)


Published in SPIE Proceedings Vol. 8859:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVIII
Oswald H. Siegmund, Editor(s)

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