Critical-angle transmission grating spectrometer for high-resolution soft x-ray spectroscopy on the International X-ray Observatory
Name
Heilmann-2010-Critical-angle transmission grating spectrometer for high-resolution.pdf
Size
9.61 MB
Format
Adobe PDF
Checksum (MD5)
744b66f83c01c5b5d722e528d68436e8
Author(s)
Davis, John E.
Dewey, Dan
Foster, Richard F.
Bruccoleri, Alexander Robert
Mukherjee, Pran
Robinson, David
Huenemoerder, David P.
Schattenburg, Mark Lee
Schulz, Norbert S.
Guo, L. Jay
Date Issued
June 2010
Journal
Proceedings of SPIE--the International Society for Optical Engineering ; v. 7732
Publisher
Institute of Electrical and Electronics Engineers
Citation
Heilmann, Ralf K. et al. “Critical-angle transmission grating spectrometer for high-resolution soft x-ray spectroscopy on the International X-ray Observatory.” Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray. Ed. Monique Arnaud, Stephen S. Murray, & Tadayuki Takahashi. San Diego, California, USA: SPIE, 2010. 77321J-11. © 2010 SPIE.
Version
Final published version
Abstract
High-resolution spectroscopy at energies below 1 keV covers the lines of C, N, O, Ne and Fe ions, and is central to studies of the Interstellar Medium, the Warm Hot Intergalactic Medium, warm absorption and outflows in Active Galactic Nuclei, coronal emission from stars, etc. The large collecting area, long focal length, and 5 arcsecond half power diameter telescope point-spread function of the International X-ray Observatory will present unprecedented opportunity for a grating spectrometer to address these areas at the forefront of astronomy and astrophysics. We present the current status of a transmission grating spectrometer based on recently developed high-efficiency critical-angle transmission (CAT) gratings that combine the traditional advantages of blazed reflection and transmission gratings. The optical design places light-weight grating arrays close to the telescope mirrors, which maximizes dispersion distance and thus spectral resolution and minimizes demands on mirror performance. It merges features from the Chandra High Energy Transmission Grating Spectrometer and the XMM-Newton Reflection Grating Spectrometer, and provides resolving power R = E/ΔE = 3000 - 5000 (full width half max) and effective area >1000 cm[superscript 2] in the soft x-ray band. We discuss recent results on ray-tracing and optimization of the optical design, instrument configuration studies, and grating fabrication.
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1117/12.856482
