Conference proceeding
Flight-like critical-angle transmission grating x-ray performance for Arcus
SPACE TELESCOPES AND INSTRUMENTATION 2022: ULTRAVIOLET TO GAMMA RAY, Vol.12181, pp.1218116-1218116-13
Proceedings of SPIE
01/01/2022
DOI: 10.1117/12.2628195
Abstract
High resolving power soft x-ray spectroscopy has been confirmed by the recent Astro2020 Decadal Survey as a high-priority strategic goal with R = lambda/Delta lambda as high as 7500 for some science cases. Examples are the characterization of highly ionized gases in galaxy halos and within and around galaxy clusters, accretion onto supermassive black holes, coronal mass ejections and coronal heating. Below the level of an expensive strategic mission, but far exceeding current capabilities, falls the Arcus Grating Explorer mission concept, with a minimum R of 2500 (expected R = 3500) and effective area up to similar to 300 cm(2) in the 12-50 angstrom bandpass. Arcus relies on light-weight, high-efficiency, blazed and alignment-insensitive critical-angle transmission (CAT) gratings for dispersion. The mission calls for hundreds of similar to 30x30 mm(2) gratings with a hierarchy of integrated support structures. The most recent CAT gratings have been fabricated from 200 mm silicon-on-insulator wafers using commercial, volume production compatible tools from the semiconductor and MEMS industries. We report x-ray results from quasi-fully illuminated, co-aligned CAT gratings showing record-high R similar to 1.3x10(4) in 18th order at Al-K-alpha wavelengths, and diffraction efficiency of blazed orders in agreement with pencil beam synchrotron measurements and model predictions at O-K. Tilt of the deep-etched, freestanding grating bars relative to the grating surface is measured and successfully compensated through angular alignment during bonding of the Si gratings to metal frames. We also report on updates to the Arcus resolving power error budget, and on post-fabrication thinning of grating bars, which could lead to increased diffraction efficiency.
Details
- Title: Subtitle
- Flight-like critical-angle transmission grating x-ray performance for Arcus
- Creators
- Ralf K. Heilmann - Massachusetts Institute of TechnologyAlexander BruccoleriVadim Burwitz - Max Planck Institute for Extraterrestrial PhysicsPeter Cheimets - Smithsonian Astrophysical ObservatoryCasey DeRoo - University of IowaAlan Garner - Massachusetts Institute of TechnologyEric Gullikson - Lawrence Berkeley National LaboratoryHans M. Guenther - MIT, MIT Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USAGisela Hartner - Max Planck Institute for Extraterrestrial PhysicsEdward Hertz - Smithsonian Astrophysical ObservatoryAndreas Langmeier - Max Planck Institute for Extraterrestrial PhysicsThomas Mueller - Max Planck Institute for Extraterrestrial PhysicsSurangkhana Rukdee - Max Planck Institute for Extraterrestrial PhysicsThomas Schmidt - Max Planck Institute for Extraterrestrial PhysicsRandall K. Smith - Smithsonian Astrophysical ObservatoryMark L. Schattenburg - Massachusetts Institute of Technology
- Contributors
- JWA DenHerder (Editor)S Nikzad (Editor)K Nakazawa (Editor)
- Resource Type
- Conference proceeding
- Publication Details
- SPACE TELESCOPES AND INSTRUMENTATION 2022: ULTRAVIOLET TO GAMMA RAY, Vol.12181, pp.1218116-1218116-13
- Publisher
- Spie-Int Soc Optical Engineering
- Series
- Proceedings of SPIE
- DOI
- 10.1117/12.2628195
- ISSN
- 0277-786X
- eISSN
- 1996-756X
- Number of pages
- 13
- Grant note
- DE-AC02-05CH11231 / DOE Office of Science User Facility; United States Department of Energy (DOE) 871158 / European Union; European Commission 80NSSC19K0335; 80NSSC20K0780 / NASA; National Aeronautics & Space Administration (NASA) MIT Kavli Insititute for Astrophysics and Space Research DMR 1419807 / MRSEC Program of the National Science Foundation; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS)
- Language
- English
- Date published
- 01/01/2022
- Academic Unit
- Physics and Astronomy; University College Courses
- Record Identifier
- 9984428840402771
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