Balloon-borne FIREBall-2 UV spectrograph stray light control based on non-sequential reverse modeling of on-sky data
AffiliationWyant College of Optical Sciences, University of Arizona
Steward Observatory, University of Arizona
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CitationBrendel, T., Khan, A., Agarwal, S., Choi, H., Kim, D., & Hamden, E. (2022). Balloon-borne FIREBall-2 UV spectrograph stray light control based on non-sequential reverse modeling of on-sky data. Proceedings of SPIE - The International Society for Optical Engineering, 12182.
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AbstractWe 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. © 2022 SPIE.
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