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Proceedings Paper

The Constellation-X RGS options: raytrace modeling of the off-plane gratings
Author(s): Kathryn A. Flanagan; John E. Davis; Ralf K. Heilmann; Alan M. Levine; Michael McGuirk; George R. Ricker; Mark L. Schattenburg; Michael Wise; Andrew Rasmussen; Jay A. Bookbinder; Mark D. Freeman; Terrance J. Gaetz; Diab Jerius; Dan Nguyen; William A. Podgorski; P. B. Reid; Webster C. Cash; Ann F. Shipley; Dennis J. Gallagher; Pei Huang; Steve P. Jordan
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Paper Abstract

The Reflection Grating Spectrometer of the Constellation-X mission has two strong candidate configurations. The first configuration, the in-plane grating (IPG), is a set of reflection gratings similar to those flown on XMM-Newton and has grooves perpendicular to the direction of incident light. In the second configuration, the off-plane grating (OPG), the grooves are closer to being parallel to the incident light, and diffract along a cone. It has advantages of higher packing density, and higher reflectivity. Confinement of these gratings to sub-apertures of the optic allow high spectral resolution. We have developed a raytrace model and analysis technique for the off-plane grating configuration. Initial estimates indicate that first order resolving powers in excess of 1000 (defined with half-energy width) are achievable for sufficiently long wavelengths (λ ≥ 12Å), provided separate accommodation is made for gratings in the subaperture region farther from the zeroth order location.

Paper Details

Date Published: 11 October 2004
PDF: 15 pages
Proc. SPIE 5488, UV and Gamma-Ray Space Telescope Systems, (11 October 2004); doi: 10.1117/12.551766
Show Author Affiliations
Kathryn A. Flanagan, Massachusetts Institute of Technology (United States)
John E. Davis, Massachusetts Institute of Technology (United States)
Ralf K. Heilmann, Massachusetts Institute of Technology (United States)
Alan M. Levine, Massachusetts Institute of Technology (United States)
Michael McGuirk, Massachusetts Institute of Technology (United States)
George R. Ricker, Massachusetts Institute of Technology (United States)
Mark L. Schattenburg, Massachusetts Institute of Technology (United States)
Michael Wise, Massachusetts Institute of Technology (United States)
Andrew Rasmussen, Columbia Univ. (United States)
Jay A. Bookbinder, Smithsonian Astrophysical Observatory (United States)
Mark D. Freeman, Smithsonian Astrophysical Observatory (United States)
Terrance J. Gaetz, Smithsonian Astrophysical Observatory (United States)
Diab Jerius, Smithsonian Astrophysical Observatory (United States)
Dan Nguyen, Smithsonian Astrophysical Observatory (United States)
William A. Podgorski, Smithsonian Astrophysical Observatory (United States)
P. B. Reid, Smithsonian Astrophysical Observatory (United States)
Webster C. Cash, Univ. of Colorado/Boulder (United States)
Ann F. Shipley, Univ. of Colorado/Boulder (United States)
Dennis J. Gallagher, Ball Aerospace & Technology Corp. (United States)
Pei Huang, Ball Aerospace & Technology Corp. (United States)
Steve P. Jordan, Ball Aerospace & Technology Corp. (United States)


Published in SPIE Proceedings Vol. 5488:
UV and Gamma-Ray Space Telescope Systems
Guenther Hasinger; Martin J. L. Turner, Editor(s)

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