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Proceedings Article

The Constellation-X RGS options: raytrace modeling of the off-plane gratings

[+] Author Affiliations
Kathryn A. Flanagan, John E. Davis, Ralf K. Heilmann, Alan M. Levine, Michael McGuirk, George R. Ricker, Mark L. Schattenburg, Michael Wise

Massachusetts Institute of Technology (USA)

Andrew Rasmussen

Columbia Univ. (USA)

Jay A. Bookbinder, Mark D. Freeman, Terrance J. Gaetz, Diab Jerius, Dan Nguyen, William A. Podgorski, P. B. Reid

Smithsonian Astrophysical Observatory (USA)

Webster C. Cash, Ann F. Shipley

Univ. of Colorado/Boulder (USA)

Dennis J. Gallagher, Pei Huang, Steve P. Jordan

Ball Aerospace & Technology Corp. (USA)

Proc. SPIE 5488, UV and Gamma-Ray Space Telescope Systems, 515 (October 11, 2004); doi:10.1117/12.551766
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From Conference Volume 5488

  • UV and Gamma-Ray Space Telescope Systems
  • Guenther Hasinger; Martin J. L. Turner
  • Kona, United States | June 21, 2004

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.

© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Kathryn A. Flanagan ; John E. Davis ; Ralf K. Heilmann ; Alan M. Levine ; Michael McGuirk, et al.
"The Constellation-X RGS options: raytrace modeling of the off-plane gratings", Proc. SPIE 5488, UV and Gamma-Ray Space Telescope Systems, 515 (October 11, 2004); doi:10.1117/12.551766; http://dx.doi.org/10.1117/12.551766


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