Impact of Distortions on Fiber Position Location in the dark Energy Spectroscopic Instrument

Conference · Fri Jan 01 00:00:00 EST 2016

OSTI ID:1258782

Kent, Stephen ^[1]; Lampton, Michael ^[2]; Doel, A. Peter ^[3]; Brooks, David ^[3]; Miller, Tim ^[2]; Besuner, Robert ^[2]; Silber, Joe ^[4]; Liang, Ming ^[5]; Sprayberry, David ^[5]; Baltay, Charles ^[6]; Rabinowitz, David ^[6]

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1. Fermilab
2. UC, Berkeley, Space Sci. Dept.
3. University Coll. London
4. LBNL, Berkeley
5. NOAO, Tucson
6. Yale U.

The Dark Energy Spectroscopic Instrument, to be located at the prime focus of the Mayall telescope, includes a wide field corrector, a 5000 fiber positioner system, and a fiber view camera. The mapping of the sky to the focal plane, needed to position the fibers accurately, is described in detail. A major challenge is dealing with the large amount of distortion introduced by the optics (of order 10% scale change), including time-dependent non-axisymmetric distortions introduced by the atmospheric dispersion compensator. Solutions are presented to measure or mitigate these effects.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1258782
• Report Number(s): FERMILAB-CONF-16-206-AE-CD; 1469188
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY