The DESI fiber positioner system

被引：24
|
作者：
Schubnell, Michael [1 ]
Ameel, Jon [1 ]
Besuner, Robert W. [2 ]
Gershkovich, Irena [1 ]
Heetderks, Henry D. [2 ,3 ]
Horler, Philipp [2 ]
Kneib, Jean-Paul [3 ]
Heetderks, Henry D. [2 ,3 ]
Silber, Joseph H. [4 ]
Tarle, Gregory [1 ]
Weaverdyck, Curtis [1 ]
机构：
[1] Univ Michigan, Ann Arbor, MI 48109 USA
[2] UC Berkeley Space Sci Lab, Berkeley, CA USA
[3] Ecole Polytech Fed Lausanne, Lausanne, Switzerland
[4] Lawrence Berkeley Natl Lab, Berkeley, CA USA
来源：
GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY VI | 2016年 / 9908卷
关键词：
Dark Energy; Fiber Spectrograph; Robotic Positioners;
D O I：
10.1117/12.2233370
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The Dark Energy Spectroscopic Instrument (DESI) is under construction to measure the expansion history of the Universe using the baryon acoustic oscillation technique. A new prime focus corrector for the KPNO Mayall telescope will deliver light to 5,000 fiber optic positioners feeding ten broad-band spectrographs. The positioners have eccentric axis kinematics. Actuation is provided by two 4 mm diameter DC brushless gear-motors. An attached electronics board accepts a DC voltage for power and CAN messages for communications and drives the two motors. The positioner accepts the ferrulized and polished fiber and provides a mechanically safe path through its internal mechanism. Positioning is rapid and accurate with typical RMS errors of less than 5 mu m.
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收藏
页数：6
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