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

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.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [2] ;  [2] ;  [4] ;  [5] ;  [5] ;  [6] ;  [6]
  1. Fermilab
  2. UC, Berkeley, Space Sci. Dept.
  3. University Coll. London
  4. LBNL, Berkeley
  5. NOAO, Tucson
  6. Yale U.
Publication Date:
OSTI Identifier:
1258782
Report Number(s):
FERMILAB-CONF-16-206-AE-CD
1469188
DOE Contract Number:
AC02-07CH11359
Resource Type:
Conference
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY