Mauna Kea Spectrographic Explorer (MSE): a new optical design for the multi-object high-resolution spectrograph

Kai Zhang; Qiqige Xin; Liang Wang; Alexis Hill; Sam Barden; Jennifer Sobeck; Jennifer Marshall; Kei Szeto; Jianrong Shi; Yongtian Zhu; Zhongwen Hu; Xuefei Gong

doi:10.1117/12.2631689

29 August 2022 Mauna Kea Spectrographic Explorer (MSE): a new optical design for the multi-object high-resolution spectrograph

Kai Zhang, Qiqige Xin, Liang Wang, Alexis Hill, Sam Barden, Jennifer Sobeck, Jennifer Marshall, Kei Szeto, Jianrong Shi, Yongtian Zhu, Zhongwen Hu, Xuefei Gong

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121847O (2022) https://doi.org/10.1117/12.2631689
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

The Maunakea Spectroscopic Explorer (MSE) project will transform the CFHT 3.6m optical telescope into an 11.25m multi-object spectroscopic facility with a 1.5 square degrees field of view. It will get the ability to simultaneously measure 4,332 objects with two spectral resolution modes respectively low/moderate resolution of R=3,000/6,000, and high resolution of R≥30,000. Multi-object high resolution (HR) spectrographs take the challenge of simultaneously producing a thousand high-resolution spectra respectively at blue, green, and red channels. A few different optical designs have been investigated deeply by scientific and technical groups since 2018. With the trade-off studies between science cases and technical capability in dispersers, the paper describes a new design proposal based on using the echelle gratings and taking reference to the industrialized production process. It enables to reduce the technical risk in dispersers and switch the observing wavelength bandpasses quickly by sorting filters.

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Kai Zhang, Qiqige Xin, Liang Wang, Alexis Hill, Sam Barden, Jennifer Sobeck, Jennifer Marshall, Kei Szeto, Jianrong Shi, Yongtian Zhu, Zhongwen Hu, and Xuefei Gong "Mauna Kea Spectrographic Explorer (MSE): a new optical design for the multi-object high-resolution spectrograph", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121847O (29 August 2022); https://doi.org/10.1117/12.2631689

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KEYWORDS

Spectrographs

Optical fibers

Optical design

Astronomical imaging

Sensors

Calibration

Spectral resolution

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