Daniel K. Inouye Solar Telescope's heat stop

N. Chriselle; Lukas Rimmele; Scott Gregory; Paul Jeffers

doi:10.1117/12.2629498

29 August 2022 Daniel K. Inouye Solar Telescope's heat stop

N. Chriselle, Lukas Rimmele, Scott Gregory, Paul Jeffers

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121842H (2022) https://doi.org/10.1117/12.2629498
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

The National Science Foundation Daniel K. Inouye Solar Telescope (DKIST) is a 4-m off-axis telescope that points directly at the sun. Pointing at the sun generates a tremendous amount of heat (approximately 12kW) which requires an innovative cooling method and thermal control to avoid damaging telescope equipment and the building. The heat stop is one component DKIST implemented as part of the thermal control system. The heat stop is located at the telescope’s prime focus and blocks most light from proceeding to the M2 mirror and subsequent optics with a five (5) arcmin field of view diameter. The surface temperatures of the heat stop are also maintained near ambient temperatures to minimize self-induced seeing and maintain high-quality images. The heat stop comprises of the following: a reflector and an absorber. Computational fluid dynamics (CFD) modeled the thermal performance of the current heat stop reflector and absorber design. Installed temperature sensors and historical data shall then determine the actual fluid thermal heat loads and rise in surface temperatures. The results shall verify the thermal performance of the heat stop. Future work includes investigating whether or not the heat stop contributes to any seeing that may be present in the instrumentation images.

Citation Download Citation

N. Chriselle, Lukas Rimmele, Scott Gregory, and Paul Jeffers "Daniel K. Inouye Solar Telescope's heat stop", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121842H (29 August 2022); https://doi.org/10.1117/12.2629498

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