Balloon-borne FIREBall-2 UV spectrograph stray light control based on non-sequential reverse modeling of on-sky data

Trenton Brendel; Aafaque Khan; Simran Agarwal; Heejoo Choi; Daewook Kim; Erika Hamden

doi:10.1117/12.2631704

29 August 2022 Balloon-borne FIREBall-2 UV spectrograph stray light control based on non-sequential reverse modeling of on-sky data

Trenton Brendel, Aafaque Khan, Simran Agarwal, Heejoo Choi, Daewook Kim, Erika Hamden

Author Affiliations +

Proceedings Volume 12182, Ground-based and Airborne Telescopes IX; 121823L (2022) https://doi.org/10.1117/12.2631704
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

We present a comprehensive stray light analysis and mitigation strategy for the FIREBall-2 UV telescope. Using non-sequential optical modeling, we identified the most problematic stray light paths which impacted telescope performance during the 2018 flight campaign. After confirming the correspondence between the simulation results and post-flight calibration measurements of stray light contributions, a system of baffles was designed to minimize stray light contamination. The baffles were fabricated and coated to maximize stray light collection ability. Once completed, the baffles will be integrated into FIREBall-2 and tested for performance preceding the upcoming flight campaign. Given our analysis results, we anticipate a substantial reduction in the effects of stray light.

Citation Download Citation

Trenton Brendel, Aafaque Khan, Simran Agarwal, Heejoo Choi, Daewook Kim, and Erika Hamden "Balloon-borne FIREBall-2 UV spectrograph stray light control based on non-sequential reverse modeling of on-sky data", Proc. SPIE 12182, Ground-based and Airborne Telescopes IX, 121823L (29 August 2022); https://doi.org/10.1117/12.2631704

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