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Design, Implementation, and Performance of the Astro-H SXS Calorimeter Array and Anticoincidence DetectorThe calorimeter array of the JAXA Astro-H (renamed Hitomi) soft x-ray spectrometer (SXS) was designed to provide unprecedented spectral resolution of spatially extended cosmic x-ray sources and of all cosmic x-ray sources in the Fe-K band around 6 keV, enabling essential plasma diagnostics. The SXS had a square array of 36 x-ray calorimeters at the focal plane. These calorimeters consisted of ion-implanted silicon thermistors and HgTe thermalizing x-ray absorbers. These devices demonstrated a resolution of better than 4.5 eV at 6 keV when operated at a heat-sink temperature of 50 mK. We will discuss the basic physical parameters of this array, including the array layout, thermal conductance of the link to the heat sink, resistance function, absorber details, and means of attaching the absorber to the thermistor-bearing element. We will also present the thermal characterization of the whole array, including thermal conductance and crosstalk measurements and the results of pulsing the frame temperature via alpha particles, heat pulses, and the environmental background. A silicon ionization detector was located behind the calorimeter array and served to reject events due to cosmic rays. We will briefly describe this anticoincidence detector and its performance.
Document ID
20180003041
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Kilbourne, Caroline A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Adams, Joseph S.
(Maryland Univ. Baltimore County Baltimore, MD, United States)
Brekosky, Regis P.
(MEI Technologies, Inc. Houston, TX, United States)
Chervenak, James A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Chiao, Meng P.
(Maryland Univ. Baltimore County Baltimore, MD, United States)
Eckart, Megan E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Figueroa-Feliciano, Enectali
(Northwestern Univ. Evanston, IL, United States)
Galeazzi, Masimilliano
(Miami Univ. Coral Gables, FL, United States)
Grein, Christoph
(EPIR Technologies, Inc. Bolingbrook, IL, United States)
Jhabvala, Christine A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kelly, Daniel
(ASRC Aerospace Corp. Greenbelt, MD, United States)
Leutenegger, Maurice A.
(Maryland Univ. Baltimore County Baltimore, MD, United States)
McCammon,Dan
(Wisconsin Univ. Madison, WI, United States)
Porter, F. Scott
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Szymkowiak, Andrew E.
(Yale Univ. New Haven, CT, United States)
Watanabe, Tomomi
(Maryland Univ. College Park, MD, United States)
Zhao, Jun
(EPIR Technologies, Inc. Bolingbrook, IL, United States)
Date Acquired
May 25, 2018
Publication Date
February 23, 2018
Publication Information
Publication: Journal of Astronomical Telescopes, Instruments, and Systems
Publisher: SPIE Digital Library
Volume: 4
Issue: 1
Subject Category
Spacecraft Instrumentation And Astrionics
Report/Patent Number
GSFC-E-DAA-TN53944
Funding Number(s)
CONTRACT_GRANT: 80GSFC17M0002
CONTRACT_GRANT: NNG13CR48C
Distribution Limits
Public
Copyright
Other

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