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Proceedings Paper

In-flight performance of the Soft X-ray Spectrometer detector system on Astro-H
Author(s): Frederick S. Porter; Kevin R. Boyce; Meng P. Chiao; Megan E. Eckart; Ryuichi Fujimoto; Yoshitaka Ishisaki; Richard L. Kelley; Caroline A. Kilbourne; Maurice A. Leutenegger; Dan McCammon; Kazuhisa Mitsuda; Kosuke Sato; Hiromi Seta; Makoto Sawada; Gary A. Sneiderman; Andrew E. Szymkowiak; Yoh Takei; Makoto S. Tashiro; Masahiro Tsujimoto; Tomomi Watanabe; Shinya Yamada
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Paper Abstract

The SXS instrument was launched aboard the Astro-H observatory on February 17, 2016. The SXS spectrometer is based on a high sensitivity x-ray calorimeter detector system that has been successfully deployed in many ground and sub-orbital spectrometers. The instrument was to provide essential diagnostics for nearly every class of x-ray emitting objects from the atmosphere of Jupiter to the outskirts of galaxy clusters, without degradation for spatially extended objects. The SXS detector system consisted of a 36-pixel cryogenic microcalorimeter array operated at a heat sink temperature of 50 mK. In pre-flight testing, the detector system demonstrated a resolving power of better than 1300 at 6 keV with a simultaneous band-pass from below 0.3 keV to above 12 keV with a timing precision better than 100 μs. In addition, a solid-state anti-coincidence detector was placed directly behind the detector array for background suppression. The detector error budget included the measured interference from the SXS cooling system and the spacecraft. Additional margin for on-orbit gain-stability, and on-orbit spacecraft interference were also included predicting an on-orbit performance that meets or exceeds the 7 eV FWHM at 6 keV requirement. The actual on-orbit spectral resolution was better than 5 eV FWHM at 6 keV, easily satisfying the instrument requirement. Here we discuss the actual on-orbit performance of the SXS detector system and compare this to performance in pre-flight testing and the on-orbit predictions. We will also discuss the on-orbit gain stability, additional on-orbit interference, and measurements of the on-orbit background.

Paper Details

Date Published: 19 July 2016
PDF: 14 pages
Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99050W (19 July 2016); doi: 10.1117/12.2232799
Show Author Affiliations
Frederick S. Porter, NASA Goddard Space Flight Ctr. (United States)
Kevin R. Boyce, NASA Goddard Space Flight Ctr. (United States)
Meng P. Chiao, NASA Goddard Space Flight Ctr. (United States)
Megan E. Eckart, NASA Goddard Space Flight Ctr. (United States)
Ryuichi Fujimoto, Kanazawa Univ. (Japan)
Yoshitaka Ishisaki, Tokyo Metropolitan Univ. (Japan)
Richard L. Kelley, NASA Goddard Space Flight Ctr. (United States)
Caroline A. Kilbourne, NASA Goddard Space Flight Ctr. (United States)
Maurice A. Leutenegger, NASA Goddard Space Flight Ctr. (United States)
Dan McCammon, Univ. of Wisconsin (United States)
Kazuhisa Mitsuda, Institute of Space and Astronautical Science, JAXA (Japan)
Kosuke Sato, Tokyo Univ. of Science (Japan)
Hiromi Seta, Tokyo Metropolitan Univ. (Japan)
Makoto Sawada, Aoyama Gakuin Univ. (Japan)
Gary A. Sneiderman, NASA Goddard Space Flight Ctr. (United States)
Andrew E. Szymkowiak, Yale Univ. (United States)
Yoh Takei, Institute of Space and Astronautical Science, JAXA (Japan)
Makoto S. Tashiro, Saitama Univ. (Japan)
Masahiro Tsujimoto, Institute of Space and Astronautical Science, JAXA (Japan)
Tomomi Watanabe, NASA Goddard Space Flight Ctr. (United States)
Shinya Yamada, Tokyo Metropolitan Univ. (Japan)


Published in SPIE Proceedings Vol. 9905:
Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray
Jan-Willem A. den Herder; Tadayuki Takahashi; Marshall Bautz, Editor(s)

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