In-flight performance of the soft x-ray spectrometer detector system on Astro-H

被引：20

作者：

Porter, Frederick S. ^{[1
]}

Boyce, Kevin R. ^{[1
]}

Chiao, Meng P. ^{[1
]}

Eckart, Megan E. ^{[1
]}

Fujimoto, Ryuichi ^{[2
]}

Ishisaki, Yoshitaka ^{[3
]}

Kilbourne, Caroline Anne ^{[1
]}

Leutenegger, Maurice A. ^{[1
]}

McCammon, Daniel ^{[4
]}

Mitsuda, Kazuhisa ^{[5
]}

Sato, Kosuke ^{[6
]}

Seta, Hiromi ^{[3
]}

Sawada, Makoto ^{[7
]}

Sneiderman, Gary A. ^{[1
]}

Szymkowiak, Andrew E. ^{[8
]}

Takei, Yoh ^{[5
]}

Tashiro, Makoto S. ^{[9
]}

Tsujimoto, Masahiro ^{[5
]}

Watanabe, Tomomi ^{[1
]}

Yamada, Shinya ^{[3
]}

机构：

[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[2] Kanazawa Univ, Dept Phys, Kanazawa, Ishikawa, Japan

[3] Tokyo Metropolitan Univ, Dept Phys, Hachioji, Tokyo, Japan

[4] Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA

[5] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa, Japan

[6] Tokyo Univ Sci, Dept Phys, Shinjuku Ku, Tokyo, Japan

[7] Aoyama Gakuin Univ, Dept Phys & Math, Sagamihara, Kanagawa, Japan

[8] Yale Univ, Dept Phys, New Haven, CT USA

[9] Saitama Univ, Dept Phys, Saitama, Japan

来源：

JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS | 2018年 / 4卷 / 01期

关键词：

x-ray astrophysics; x-ray spectroscopy; x-ray detectors; ORBIT OPERATION; SXS; RESOLUTION; DESIGN; HITOMI; IMPLEMENTATION; CRYOCOOLERS; INSTRUMENT;

D O I：

10.1117/1.JATIS.4.1.011218

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

The soft x-ray spectrometer (SXS) instrument was launched aboard the Astro-H (Hitomi) observatory on February 17, 2016. The SXS is based on a high-sensitivity x-ray calorimeter detector system that has been successfully deployed in many ground and suborbital 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 preflight testing, the detector system demonstrated a resolving power of better than 1300 at 6 keV with a simultaneous bandpass from below 0.3 keV to above 12 keV with a timing precision better than 100 mu s. 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 preflight 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. (c) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License.

引用

页数：9

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