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Proceedings Paper

Astrophysical Plasmadynamic Explorer (APEX): a high-resolution spectroscopic observatory
Author(s): Michael P. Kowalski; Raymond G. Cruddace; Kent S. Wood; Daryl J. Yentis; Herbert Gursky; Troy W. Barbee Jr.; William H. Goldstein; Joseph F. Kordas; Gilbert G. Fritz; William R. Hunter; Martin Adrian Barstow; Nigel P. Bannister; J. Leonard Culhane; Jonathan S. Lapington
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Paper Abstract

EUVE and the ROSAT WFC have left a tremendous legacy in astrophysics at EUV wavelengths. More recently, Chandra and XMM-Newton have demonstrated at X-ray wavelengths the power of high-resolution astronomical spectroscopy, which allows the identification of weak emission lines, the measurement of Doppler shifts and line profiles, and the detection of narrow absorption features. This leads to a thorough understanding of the density, temperature, abundance, magnetic, and dynamic structure of astrophysical plasmas. However, the termination of the EUVE mission has left a gap in spectral coverage at crucial EUV wavelengths (~100-300 Å), where hot (105 - 108 K) plasmas radiate most strongly and produce critical spectral diagnostics. CHIPS will fill this hole only partially as it is optimized for diffuse emission and has only moderate resolution (R~150). For discrete sources, we have successfully flown a follow-on instrument to the EUVE spectrometer (Aeff ~ 1 cm2, R ~ 400), the high-resolution spectrometer J-PEX (Aeff ~ 3 cm2, R ~ 3000). Here we build on the J-PEX prototype and present a strawman design for an orbiting spectroscopic observatory, APEX, a SMEX-class instrument containing a suite of 8 spectrometers that together achieve both high effective area (Aeff > 10 cm2) and high spectral resolution (R ~ 10,000) over the range 100-300 Å. We also discuss alternate configurations for shorter and longer wavelengths.

Paper Details

Date Published: 24 February 2003
PDF: 14 pages
Proc. SPIE 4854, Future EUV/UV and Visible Space Astrophysics Missions and Instrumentation, (24 February 2003); doi: 10.1117/12.459808
Show Author Affiliations
Michael P. Kowalski, Naval Research Lab. (United States)
Raymond G. Cruddace, Naval Research Lab. (United States)
Kent S. Wood, Naval Research Lab. (United States)
Daryl J. Yentis, Naval Research Lab. (United States)
Herbert Gursky, Naval Research Lab. (United States)
Troy W. Barbee Jr., Lawrence Livermore National Lab. (United States)
William H. Goldstein, Lawrence Livermore National Lab. (United States)
Joseph F. Kordas, Lawrence Livermore National Lab. (United States)
Gilbert G. Fritz, PRAXIS (United States)
William R. Hunter, SFA, Inc. (United States)
Martin Adrian Barstow, Univ. of Leicester (United Kingdom)
Nigel P. Bannister, Univ. of Leicester (United Kingdom)
J. Leonard Culhane, Mullard Space Science Lab. (United Kingdom)
Jonathan S. Lapington, Boston Univ. (United States)
Mullard Space Science Lab. (United Kingdom)

Published in SPIE Proceedings Vol. 4854:
Future EUV/UV and Visible Space Astrophysics Missions and Instrumentation
J. Chris Blades; Oswald H. W. Siegmund, Editor(s)

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