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.

引用

页数：6

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