Conference proceeding
Characterizing fabrication quality and UV performance of UV gratings
Vol.13093, pp.1309342-1309342-11
08/21/2024
DOI: 10.1117/12.3016276
Abstract
Ultraviolet (UV, 900−2000 Å) spectroscopy plays a vital role in studying exoplanets. Future UV spectrographs will require large-format, high-performance gratings (R > 104). Unfortunately, measuring the UV performance of a large-format grating from 900−2000˚ Å is resource-intensive and requires large special vacuum facilities, hampering UV grating development. An efficient characterization process will save time and reduce costs, facilitating the development of blazed UV gratings for next-gen UV space telescopes. This work is part of an effort to determine if we can leverage trends found between measured UV grating performance (on small stamp-size gratings) and the grating’s intrinsic, fabricated characteristics to estimate the expected performance of large-format UV gratings. Here, we present a pilot study using an 855nm period grating. We characterize the grating’s fabrication quality via interferometry and single-point metrology. Finally, we describe measurements of the grating’s diffraction efficiency that will be conducted later this year.
Details
- Title: Subtitle
- Characterizing fabrication quality and UV performance of UV gratings
- Creators
- Jared A. B. Termini - University of IowaKeri Hoadley - University of Iowa, Physics and AstronomyCasey DeRoo - University of IowaCecilia Fasano - University of IowaPaul Scowen - NASA Goddard Space Flight Ctr. (United States)Manuel Quijada - NASA Goddard Space Flight Ctr. (United States)Mateo Batkis - NASA Goddard Space Flight Ctr. (United States)Javier Del Hoyo - NASA Goddard Space Flight Ctr. (United States)Luis Rodriguez-de-Marcos - Catholic University of AmericaErika Hamden - University of ArizonaJessica Li - University of Arizona
- Contributors
- Jan-Willem A. den Herder (Editor) - SRON Netherlands Institute for Space ResearchShouleh Nikzad (Editor) - Jet Propulsion LaboratoryKazuhiro Nakazawa (Editor) - Nagoya University
- Resource Type
- Conference proceeding
- Publication Details
- Vol.13093, pp.1309342-1309342-11
- Publisher
- SPIE
- DOI
- 10.1117/12.3016276
- ISSN
- 0277-786X
- eISSN
- 1996-756X
- Grant note
- NASA: 80NSSC22K0210, 80NSSC22K0159, 80NSSC22K1178, 80NSSC21K1837 University of IowaUniversity of Iowa Materials Analysis, Testing
This research is supported by NASA under Award No. 80NSSC22K0210, 80NSSC22K0159, an NSTGRO Fellowship (80NSSC22K1178), a FINESST award (80NSSC21K1837), and by internal funding from the University of Iowa. We acknowledge the University of Iowa Materials Analysis, Testing, and Fabrication Facility for the use of the Raith Voyager EBL tool and the Angstrom Engineering 6-pocket E-Beam Evaporator. We also thank Dr. Manuel Quijada, Mateo Batkis, and Javier Del Hoyo of NASA Goddard Space Flight Center's Instrument Systems & Technology Division for their assistance in our metrology measurements and coating the imprinted grating.
- Language
- English
- Date published
- 08/21/2024
- Academic Unit
- Physics and Astronomy; University College Courses
- Record Identifier
- 9984721144302771
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