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Proceedings Paper

Laboratory astrophysics using a spare XRS microcalorimeter
Author(s): Frederick Scott Porter; Michael Damian Audley; Peter Beiersdorfer; Kevin R. Boyce; Regis P. Brekosky; Gregory V. Brown; Keith C. Gendreau; John D. Gygax; Steven M. Kahn; Richard L. Kelley; Caroline Kilbourn Stahle; Andrew E. Szymkowiak
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Paper Abstract

The XRS instrument on Astro-E is a fully self-contained microcalorimeter x-ray instrument capable of acquiring, optimally filtering, and characterizing events for 32 independent pixels. We have recently integrated a full engineering model XRS detector system into a laboratory cryostat for use on the electron beam ion trap (EBIT) at Lawrence Livermore National Laboratory. The detector system contains a microcalorimeter array with 32 instrumented pixels heat sunk to 60 mK using an adiabatic demagnetization refrigerator. The instrument has a composite resolution of 8 eV at 1 keV and 11 eV at 6 keV with a minimum of 98% quantum efficiency and a total collecting area of 13 mm2. This will allow high spectral resolution, broadband observations of plasmas with known ionization states that are produced in the EBIT experiment. Unique to our instrument are exceptionally well characterized 1000 Angstrom thick aluminum on polyimide infrared blocking filters. The detailed transmission function including the edge fine structure of these filters has been measured in our laboratory using a variable spaced grating spectrometer. This will allow the instrument to perform the first broadband absolute flux measurements with the EBIT instrument. The instrument performance as well as the results of preliminary measurements of Fe K and L shell at fixed electron energy, Fe emission with Maxwellian electron distributions, and phase resolved spectroscopy of ionizing plasmas will be discussed.

Paper Details

Date Published: 13 December 2000
PDF: 12 pages
Proc. SPIE 4140, X-Ray and Gamma-Ray Instrumentation for Astronomy XI, (13 December 2000); doi: 10.1117/12.409137
Show Author Affiliations
Frederick Scott Porter, NASA Goddard Space Flight Ctr. (United States)
Michael Damian Audley, Institute of Space and Astronautical Science (Japan)
Peter Beiersdorfer, Lawrence Livermore National Lab. (United States)
Kevin R. Boyce, NASA Goddard Space Flight Ctr. (United States)
Regis P. Brekosky, NASA Goddard Space Flight Ctr. and Swales Aerospace (United States)
Gregory V. Brown, Lawrence Livermore National Lab. (United States)
Keith C. Gendreau, NASA Goddard Space Flight Ctr. (United States)
John D. Gygax, NASA Goddard Space Flight Ctr. and Swales Aerospace (United States)
Steven M. Kahn, Columbia Univ. (United States)
Richard L. Kelley, NASA Goddard Space Flight Ctr. (United States)
Caroline Kilbourn Stahle, NASA Goddard Space Flight Ctr. (United States)
Andrew E. Szymkowiak, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 4140:
X-Ray and Gamma-Ray Instrumentation for Astronomy XI
Kathryn A. Flanagan; Oswald H. W. Siegmund, Editor(s)

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