Commissioning of the Gregorian Optical System calibration unit for DKIST

Andrew Ferayorni; Scott Gregory; Lukas Rimmele; Stacey Sueoka; David Harrington

doi:10.1117/12.2563227

13 December 2020 Commissioning of the Gregorian Optical System calibration unit for DKIST

Andrew Ferayorni, Scott Gregory, Lukas Rimmele, Stacey Sueoka, David Harrington

Proceedings Volume 11450, Modeling, Systems Engineering, and Project Management for Astronomy IX; 114502R (2020) https://doi.org/10.1117/12.2563227
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The Daniel K. Inouye Solar Telescope (DKIST) is a 4-meter solar observatory under construction at Haleakala, Hawaii. The Gregorian Optical System (GOS) is located at the secondary focus of the telescope and actuates different apertures and optics into the beam in order to facilitate configuration of the telescope optical beam for science and calibration activities. Due its location near Gregorian focus, the GOS design addresses several thermal challenges in order to maintain safe operating temperatures and prevent local seeing effects. In this paper we describe these thermal challenges and explain how we used modeling and simulation analyses to guide design choices. We will review results and limitations from the GOS lab acceptance testing process, look at lessons learned from integration at the summit, and share initial results from on sun testing. We conclude by comparing on sun test results with predictions from our design phase analyses.

Conference Presentation

Citation Download Citation

Andrew Ferayorni, Scott Gregory, Lukas Rimmele, Stacey Sueoka, and David Harrington "Commissioning of the Gregorian Optical System calibration unit for DKIST", Proc. SPIE 11450, Modeling, Systems Engineering, and Project Management for Astronomy IX, 114502R (13 December 2020); https://doi.org/10.1117/12.2563227

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