Tip-tilt performance test of FSMP for development of the GMT FSM

Sanghyuk Kim; Chang-Hee Kim; Ueejeong Jeong; Sungho Lee; Won Gi Lee; Chan-Hee Lee; Il-Kwon Moon; Jeong-Yeol Han; Yunjong Kim; Bongkon Moon; Myung Kyu Cho; Byeong-Gon Park; Chan Park; Ho-Sang Kim; Paul B. Gardner; Robert J. Bernier; Frank Groark; Hugo Chiquito

doi:10.1117/12.2311774

6 July 2018 Tip-tilt performance test of FSMP for development of the GMT FSM

Sanghyuk Kim, Chang-Hee Kim, Ueejeong Jeong, Sungho Lee, Won Gi Lee, Chan-Hee Lee, Il-Kwon Moon, Jeong-Yeol Han, Yunjong Kim, Bongkon Moon, Myung Kyu Cho, Byeong-Gon Park, Chan Park, Ho-Sang Kim, Paul B. Gardner, Robert J. Bernier, Frank Groark, Hugo Chiquito

Author Affiliations +

Proceedings Volume 10700, Ground-based and Airborne Telescopes VII; 107003P (2018) https://doi.org/10.1117/12.2311774
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

The Giant Magellan Telescope (GMT) will be equipped with two Gregorian secondary mirrors: a fast-steering mirror (FSM) system for seeing-limited operations and an adaptive secondary mirror (ASM) for adaptive optics observing modes. The FSM has an effective diameter of 3.2 m and is comprised of seven 1.1 m diameter circular segments, which are conjugated 1:1 to the seven 8.4m segments of the primary. Each FSM segment has a tip-tilt capability for fast guiding to attenuate telescope wind shake and jitter. To verify the tip-tilt performance at various orientations, we performed tiptilt tests using a conceptual prototype of the FSM (FSMP) which was developed at KASI for R&D of key technologies for FSM. In this paper, we present configuration, methodology, results, and lessons from the FSMP test which will be considered in the development of FSM.

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Sanghyuk Kim, Chang-Hee Kim, Ueejeong Jeong, Sungho Lee, Won Gi Lee, Chan-Hee Lee, Il-Kwon Moon, Jeong-Yeol Han, Yunjong Kim, Bongkon Moon, Myung Kyu Cho, Byeong-Gon Park, Chan Park, Ho-Sang Kim, Paul B. Gardner, Robert J. Bernier, Frank Groark, and Hugo Chiquito "Tip-tilt performance test of FSMP for development of the GMT FSM", Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 107003P (6 July 2018); https://doi.org/10.1117/12.2311774

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