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Design and Performance of the Astro-E/XRS Microcalorimeter Array and Anti-Coincidence DetectorThe XRS instrument has an array of 32 micro-calorimeters at the focal plane. These calorimeters consist of ion-implanted silicon thermistors and HgTe thermalizing x-ray absorbers. These devices have demonstrated a resolution of 9 eV at 3 keV and 11 eV at 6 keV. We will discuss the basic physical parameters of this array, including the array layout, thermal conductance of the link to the heat sink, operating temperature, thermistor size, absorber choice, and means of attaching the absorber to the thermistor bearing element. We will present representative performance data, though a more detailed presentation of the results of the instrument calibration is presented elsewhere in these proceedings. A silicon ionization detector is located behind the calorimeter array and serves to reject events due to cosmic rays. We will briefly describe this anti-coincidence detector and its performance in conjunction with the array.
Document ID
19990071212
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Stahle, C. K. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Audley, M. D. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Boyce, K. R. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Brekosky, R. P. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Fujimoto, R. (Institute of Space and Astronautical Science Japan)
Gendreau, K. C. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Gygax, J. D. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Ishisaki, Y. (Tokyo Metropolitan Univ. Tokyo, Japan)
Kelley, R. L. (NASA Goddard Space Flight Center Greenbelt, MD United States)
McClanahan, R. A. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Subject Category
Instrumentation And Photography
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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