Journal article
Arcus X-ray telescope performance predictions and alignment requirements
Journal of astronomical telescopes, instruments, and systems, Vol.11(1), 011005
10/16/2024
DOI: 10.1117/1.JATIS.11.1.011005
Abstract
Arcus is a concept for a National Aeronautics and Space Administration probe-class X-ray mission to deliver high-resolution Far Ultraviolet and X-ray spectroscopy with two separate instruments. We focus on the X-ray spectrograph (XRS). It consists of four spectral channels arranged in a double-tilted Rowland torus geometry. It combines cost-effective silicon pore optics with high-throughput critical-angle transmission gratings to achieve at least R>3000 in a bandpass from 12 to 50 Å. We present ray-tracing studies to derive performance characteristics such as the spectral resolving power and effective area and look at the best positioning of the four channels to improve the resiliency toward misalignments and reduce the overall impact of chip gaps. We study the effect of misalignments on the performance and present alignment requirements in 6 degrees of freedom for all optical elements in the XRS. We conclude that most tolerances can be achieved with mechanical means alone.
Details
- Title: Subtitle
- Arcus X-ray telescope performance predictions and alignment requirements
- Creators
- Hans Moritz Günther - Kavli Institute for Particle Astrophysics and CosmologyPeter Cheimets - Smithsonian Astrophysical ObservatoryCasey T. DeRoo - University of IowaRalf K. Heilmann - Kavli Institute for Particle Astrophysics and Cosmology
- Resource Type
- Journal article
- Publication Details
- Journal of astronomical telescopes, instruments, and systems, Vol.11(1), 011005
- Publisher
- SPIE
- DOI
- 10.1117/1.JATIS.11.1.011005
- ISSN
- 2329-4124
- Language
- English
- Date published
- 10/16/2024
- Academic Unit
- Physics and Astronomy; University College Courses
- Record Identifier
- 9984738440002771
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