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High-resolution aperture shape analysis for the JUICE and Europa ultraviolet spectrographs
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Paper Abstract

The JUICE (Jupiter ICy moons Explorer) and Europa Ultraviolet Spectrographs (JUICE-UVS and Europa-UVS, respectively) are nearly identical modest-powered (~9W) instruments scheduled to explore the Jovian satellites aboard ESA’s JUICE and NASA’s Europa Clipper missions, respectively. These spectrographs each feature a dedicated door containing a high-resolution aperture stop that reduces the focal ratio of the telescope from f/3 to f/12. The baseline design for this aperture was a 1-cm diameter circle. We compared the optical properties of the baseline 1-cm diameter aperture with a 1-cm by 1-cm square aperture in an effort to increase throughput by 27% while maintaining the native spatial resolution of the spectrograph. The effects of both apertures were analyzed with no appreciable difference in the resulting spatial or spectral resolution. Therefore, the 1-cm by 1-cm square aperture has been implemented in both JUICE- and Europa-UVS.

Paper Details

Date Published: 9 September 2019
PDF: 7 pages
Proc. SPIE 11118, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI, 1111819 (9 September 2019); doi: 10.1117/12.2529668
Show Author Affiliations
Michael W. Davis, Southwest Research Institute (United States)
Steven N. Osterman, Johns Hopkins Univ. (United States)
G. Randall Gladstone, Southwest Research Institute (United States)
Univ. of Texas, San Antonio (United States)
Kurt D. Retherford, Southwest Research Institute (United States)
Univ. of Texas, San Antonio (United States)


Published in SPIE Proceedings Vol. 11118:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI
Oswald H. Siegmund, Editor(s)

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