Volume 12 Issue 1
Feb.  2019
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ZHANG Tian-yi, ZHU Yong-tian, HOU Yong-hui, ZHANG Kai, HU Zhong-wen, WANG Lei, CHEN Yi, JIANG Hai-jiao, TANG Zhen, XU Ming-ming, JIANG Ming-da. Construction of a LAMOST high resolution spectrograph[J]. Chinese Optics, 2019, 12(1): 148-155. doi: 10.3788/CO.20191201.0148
Citation: ZHANG Tian-yi, ZHU Yong-tian, HOU Yong-hui, ZHANG Kai, HU Zhong-wen, WANG Lei, CHEN Yi, JIANG Hai-jiao, TANG Zhen, XU Ming-ming, JIANG Ming-da. Construction of a LAMOST high resolution spectrograph[J]. Chinese Optics, 2019, 12(1): 148-155. doi: 10.3788/CO.20191201.0148

Construction of a LAMOST high resolution spectrograph

doi: 10.3788/CO.20191201.0148
Funds:

National Natural Science Foundation of China 11473049

National Natural Science Foundation of China 11473048

National Natural Science Foundation of China 11603056

More Information
  • Corresponding author: ZHANG Tian-yi, E-mail:tyzhang@niaot.ac.cn
  • Received Date: 03 Apr 2018
  • Rev Recd Date: 26 Apr 2018
  • Publish Date: 01 Feb 2019
  • In order to make full use of the LAMOST telescope, as well as to achieve scientific goals such as the distribution and integrity of different stellar populations in the galaxy or the measurement of elemental abundance in extremely metal-poor stars, a LAMOST high-resolution spectrometer was developed with a spectral resolution of R ≥ 30 000 and spectral coverage range of 380-740 nm. After fully considering the factors of the site and its existing conditions, a quasi-white pupil design scheme with a repeater magnification of 0.7×was applied, using a large-core fiber, a large-diameter tiled-grating, a prism-grating disperser, and an image slicer to meet the perfermence requirment. Efficiency estimation and stray light analysis were performed. The peak efficiency of the spectrograph was more than 30%, the stray light illumination accounted for 2.55% of the total CCD illumination and the signal-to-noise ratio was 16.01dB. The solar spectrum was measured during the trial run with a temperature stability of±0.03℃ and a peak efficiency of approximately 33.5%, thus meeting requirements for stable and efficient operation.

     

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