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Proceedings Paper

The LAMOST low resolution spectrograph stability performance
Author(s): YongHui Hou; Lei Wang; Zhongwen Hu; Jianing Wang; Zhen Tang; Mingda Jiang; Yongtian Zhu
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Paper Abstract

One of the Large Sky Area Multi-Object Spectroscopic Telescope (LAMOST) scientific requirements require the ability of the low resolution spectrograph(LRS) to measure velocities to a accuracy of 4km/s over the entire 5 degree field in 2 hours objects observation. This requirement results in the specification of image movement less than 0.6μm/hours (0.05pixl/hours corresponding to the science detector).There are 16 spectrographs for LAMOST telescope, so we expect the design aspects of the instrument directed towards achieving the stability goal. In this paper we present the last design aspects of the instrument which enable meeting the 4km/s requirement, and the recent test results of the LRS’s Stability Performance. The test results show that the stability performance of LAMOST-LRS can meet the the stability goal, the image shift along the direction of dispersion is not influenced by the external factors, and the image shift along vertical dispersion direction meet the technical requirements when the environmental temperature of the spectrograph room is in control.

Paper Details

Date Published: 24 September 2012
PDF: 6 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 844660 (24 September 2012); doi: 10.1117/12.925640
Show Author Affiliations
YongHui Hou, Nanjing Institute of Astronomical Optics & Technology (China)
Lei Wang, Nanjing Institute of Astronomical Optics & Technology (China)
Zhongwen Hu, Nanjing Institute of Astronomical Optics & Technology (China)
Jianing Wang, Nanjing Institute of Astronomical Optics & Technology (China)
Zhen Tang, Nanjing Institute of Astronomical Optics & Technology (China)
Mingda Jiang, Nanjing Institute of Astronomical Optics & Technology (China)
Yongtian Zhu, Nanjing Institute of Astronomical Optics & Technology (China)


Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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