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In-Flight Performance of the Soft X-Ray Spectrometer Detector System on ASTRO-H
External Online Source: doi:10.1117/12.2232799
Author and Affiliation:
Fujimoto, Ryuichi(Kanazawa Univ., Japan);
Kelley, Richard L.(NASA Goddard Space Flight Center, Greenbelt, MD United States);
Kilbourne, Carolina A.(NASA Goddard Space Flight Center, Greenbelt, MD United States);
Leutenegger, Maurice A.(Maryland Univ. Baltimore County, Baltimore, MD, United States);
McCammon, Dan(Wisconsin Univ., Madison, WI, United States);
Mitsuda, Kazuhisa(Institute of Space and Astronautical Science, Sagamihara, Japan);
Sawada, Makoto(Gakuin Univ., Sagamihara, Japan);
Sneiderman, Gary A.(NASA Goddard Space Flight Center, Greenbelt, MD United States);
Takei, Yoh(Institute of Space and Astronautical Science, Sagamihara, Japan);
Yamada, Shinya(Tokyo Metropolitan Univ., Tokyo, Japan);
Porter, Frederick S.(NASA Goddard Space Flight Center, Greenbelt, MD United States);
Boyce, Kevin R.(NASA Goddard Inst. for Space Studies, New York, NY United States);
Chiao, Meng P.(Alcyon Technical Services-JV, Inc., Huntsville, AL, United States);
Eckart, Megan E.(NASA Goddard Space Flight Center, Greenbelt, MD United States);
Ishisaki, Yoshitaka(Tokyo Metropolitan Univ., Tokyo, Japan);
Sato, Kosuke(Tokyo Univ. of Science, Tokyo, Japan);
Seta, Hiromi(Tokyo Metropolitan Univ., Tokyo, Japan);
Szymkowiak, Andrew E.(Yale Univ., New Haven, CT, United States);
Tashiro, Makoto S.(Saitama Univ., Saitama, Japan);
Tsujimoto, Masahiro(Institute of Space and Astronautical Science, Sagamihara, Japan);
Watanabe, Tomomi(ADNET Systems, Inc., Lanham, MD, United States)
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 microsecond. 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.
Publication Date: Jul 19, 2016
Document ID:
20170006123
(Acquired Jul 14, 2017)
Subject Category: ASTROPHYSICS
Report/Patent Number: GSFC-E-DAA-TN43896
Document Type: Conference Paper
Publication Information: SPIE Proceedings; Volume 9905; 99050W
Publisher Information: SPIE
Meeting Information: Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray; 26 Jun. - 1 Jul. 2016; Edinburgh; United Kingdom
Meeting Sponsor: International Society for Optical Engineering; Bellingham, WA, United States
Contract/Grant/Task Num: NNG15CR66C
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD United States
Description: 14p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CALORIMETERS; CRYOGENICS; DEGRADATION; DIAGNOSIS; FLIGHT TESTS; HEAT SINKS; PERFORMANCE PREDICTION; PERFORMANCE TESTS; SPECTRAL RESOLUTION; X RAY DETECTORS; X RAY SPECTROMETERS; COOLING SYSTEMS; GALACTIC CLUSTERS; JUPITER ATMOSPHERE; SOLID STATE DEVICES; STABILITY; TEMPERATURE MEASUREMENT
Other Descriptors: X-RAY ASTROPHYSICS; X-RAY SPECTROSCOPY; X-RAY DETECTORS
Availability Source: Other Sources
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