• PhotoniX
  • Vol. 4, Issue 1, 16 (2023)
Yifan Zhang1、2、3、*, Haijiao Jiang1、2、4、**, Stephen Shectman5, Dehua Yang1、2、4, Zheng Cai1、2、4、***, Yong Shi6、7, Song Huang1、2、4, Lu Lu1、2、4, Yamin Zheng1、2、3, Shaonan Kang1、2、3, Shude Mao1、2、4, and Lei Huang1、2、3、****
Author Affiliations
  • 1MUltiplexed Survey Telescope (MUST) Project Collaboration, Tsinghua University, Beijing 100084, China
  • 2Center for Astronomy Technology, Tsinghua University, Beijing 100084, China
  • 3Department of Precision Instrument, Tsinghua University, Beijing 100084, China
  • 4Department of Astronomy, Tsinghua University, Beijing 100084, China
  • 5Carnegie Institution of Washington, The Carnegie Observatories, Pasadena, CA 91101, USA
  • 6School of Astronomy and Space Science, Nanjing University, Nanjing 210093, China
  • 7Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210093, China
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    DOI: 10.1186/s43074-023-00094-4 Cite this Article
    Yifan Zhang, Haijiao Jiang, Stephen Shectman, Dehua Yang, Zheng Cai, Yong Shi, Song Huang, Lu Lu, Yamin Zheng, Shaonan Kang, Shude Mao, Lei Huang. Conceptual design of the optical system of the 6.5m wide field multiplexed survey telescope with excellent image quality[J]. PhotoniX, 2023, 4(1): 16 Copy Citation Text show less

    Abstract

    Astrophysics and cosmology in the coming decades urgently need a large field-of-view (FOV), highly multiplexed spectroscopic survey telescope satisfying challenging image quality and stability requirements. The 6.5 m MUltiplexed Survey Telescope (MUST) proposed by Tsinghua University will be constructed on the Saishiteng Mountain of Northwest China to improve the spectroscopic survey capability of ground-based optical telescopes. In this paper, we demonstrate the conceptual design of the optical system of MUST. MUST will adopt a 6.5 m primary mirror, a 2.45 m secondary mirror, and a multiple-element widefield corrector (WFC) to ensure excellent image quality with an 80% encircled energy size of image spots less than ~ 0.6 arcsec in diameter for the entire 3° FOV and the whole 50° zenith angle range. Thanks to its compact 6.5 m Ritchey-Chretien system and 20,000 optical fibers on its Cassegrain focus, MUST will carry out state-of-the-art wide-field spectroscopic surveys with efficiency ~ 19 times higher than the Dark Energy Spectroscopic Instrument (DESI) using a measure proposed by Ellis et al. Upon completion around 2029, MUST will be one of the world's most advanced wide-field spectroscopic survey telescopes and a new essential reference for the future development of wide-field survey telescopes. It will enable significant advances in many fields in astrophysics and cosmology.
    Yifan Zhang, Haijiao Jiang, Stephen Shectman, Dehua Yang, Zheng Cai, Yong Shi, Song Huang, Lu Lu, Yamin Zheng, Shaonan Kang, Shude Mao, Lei Huang. Conceptual design of the optical system of the 6.5m wide field multiplexed survey telescope with excellent image quality[J]. PhotoniX, 2023, 4(1): 16
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