The DESI fiber positioner system

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.


Editor(s):
Evans, Cj
Simard, L
Takami, H
Published in:
Ground-Based And Airborne Instrumentation For Astronomy Vi, 9908, 990892
Presented at:
Conference on Ground-Based and Airborne Instrumentation for Astronomy VI, Edinburgh, SCOTLAND, JUN 26-30, 2016
Year:
2016
Publisher:
Bellingham, Spie-Int Soc Optical Engineering
ISSN:
0277-786X
ISBN:
978-1-5106-0196-3
Keywords:
Laboratories:




 Record created 2017-02-17, last modified 2018-03-17


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