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Title: The DESI Fiber View Camera System

Abstract

The Dark Energy Spectroscopic Instrument (DESI) is a 5000 fiber multi-object spectrometer now being installed at the prime focus of the 4 m Mayall telescope at Kitt Peak. Using DESI to measure ~35 million galaxy redshifts and using the Baryon Acoustic Oscillation (BAO) technique to measure distances, the results will probe the nature of the recently discovered mysterious component of our universe called dark energy. Computer controlled robotic positioners move the 120 μm diameter fibers to positions of galaxies whose location on the sky have been obtained in a previous target selection imaging survey. To achieve good throughput the fibers should be centered on the target position to within 3 μm. The robotic positioners however are only capable of a 50 μm precision on their first move. To achieve the desired precision, the Fiber View Camera (FVC) system has been implemented. The FVC, located near the hole in the primary mirror of the Mayall telescope, has been designed to take an exposure of the focal plane, located at the prime focus some 12 m above the FVC, after the robotic positioners have completed their first move. The FVC is intended to measure the fiber locations with a precision of 3more » μm and issue a set of fiber coordinate corrections for the second move correcting the fiber positions by the robotic positioners. Tests show that after two iterations better than 99% of the fibers will be in their intended location to within the desired precision. This paper describes the design of the FVC system, the R&D program preceding the final design, and the tests that have been carried out to demonstrate that the FVC can achieve the required precision.« less

Authors:
 [1];  [1];  [2];  [3];  [1]; ORCiD logo [2];  [3];  [4];  [4];  [1];  [2];  [1];  [2]
+ Show Author Affiliations
  1. Yale Univ., New Haven, CT (United States). Physics Dept.
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Yale Univ., New Haven, CT (United States). Astronomy Dept.
  4. Univ. of California, Berkeley, CA (United States). Space Sciences Lab.
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1527002
Grant/Contract Number:  
FG02-92ER40704; AC02–05CH1123
Resource Type:
Accepted Manuscript
Journal Name:
Publications of the Astronomical Society of the Pacific
Additional Journal Information:
Journal Volume: 131; Journal Issue: 1000; Journal ID: ISSN 0004-6280
Publisher:
Astronomical Society of the Pacific (ASP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; instrumentation: detectors; galaxies: statistics; (cosmology:) dark energy

Citation Formats

Baltay, C., Rabinowitz, D., Besuner, R., Casetti, D., Emmet, W., Fagrelius, P., Girard, T., Heetderks, H., Lampton, M., Lathem, A., Levi, M., Padmanabhan, N., and Silber, J. The DESI Fiber View Camera System. United States: N. p., 2019. Web. doi:10.1088/1538-3873/ab15c2.
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Baltay, C., Rabinowitz, D., Besuner, R., Casetti, D., Emmet, W., Fagrelius, P., Girard, T., Heetderks, H., Lampton, M., Lathem, A., Levi, M., Padmanabhan, N., & Silber, J. The DESI Fiber View Camera System. United States. https://doi.org/10.1088/1538-3873/ab15c2
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Baltay, C., Rabinowitz, D., Besuner, R., Casetti, D., Emmet, W., Fagrelius, P., Girard, T., Heetderks, H., Lampton, M., Lathem, A., Levi, M., Padmanabhan, N., and Silber, J. Tue . "The DESI Fiber View Camera System". United States. https://doi.org/10.1088/1538-3873/ab15c2. https://www.osti.gov/servlets/purl/1527002.
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@article{osti_1527002,
title = {The DESI Fiber View Camera System},
author = {Baltay, C. and Rabinowitz, D. and Besuner, R. and Casetti, D. and Emmet, W. and Fagrelius, P. and Girard, T. and Heetderks, H. and Lampton, M. and Lathem, A. and Levi, M. and Padmanabhan, N. and Silber, J.},
abstractNote = {The Dark Energy Spectroscopic Instrument (DESI) is a 5000 fiber multi-object spectrometer now being installed at the prime focus of the 4 m Mayall telescope at Kitt Peak. Using DESI to measure ~35 million galaxy redshifts and using the Baryon Acoustic Oscillation (BAO) technique to measure distances, the results will probe the nature of the recently discovered mysterious component of our universe called dark energy. Computer controlled robotic positioners move the 120 μm diameter fibers to positions of galaxies whose location on the sky have been obtained in a previous target selection imaging survey. To achieve good throughput the fibers should be centered on the target position to within 3 μm. The robotic positioners however are only capable of a 50 μm precision on their first move. To achieve the desired precision, the Fiber View Camera (FVC) system has been implemented. The FVC, located near the hole in the primary mirror of the Mayall telescope, has been designed to take an exposure of the focal plane, located at the prime focus some 12 m above the FVC, after the robotic positioners have completed their first move. The FVC is intended to measure the fiber locations with a precision of 3 μm and issue a set of fiber coordinate corrections for the second move correcting the fiber positions by the robotic positioners. Tests show that after two iterations better than 99% of the fibers will be in their intended location to within the desired precision. This paper describes the design of the FVC system, the R&D program preceding the final design, and the tests that have been carried out to demonstrate that the FVC can achieve the required precision.},
doi = {10.1088/1538-3873/ab15c2},
journal = {Publications of the Astronomical Society of the Pacific},
number = 1000,
volume = 131,
place = {United States},
year = {Tue May 07 00:00:00 EDT 2019},
month = {Tue May 07 00:00:00 EDT 2019}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1088/1538-3873/ab15c2
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Citation Metrics:
Cited by: 12 works
Citation information provided by
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Figures / Tables:

Table 1 Table 1: FVC Performance Requirements
All figures and tables (13 total)
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Works referenced in this record:

The DESI wide field corrector optics
conference, August 2014

  • Doel, Peter; Sholl, Michael J.; Liang, Ming
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.2057172

ProtoDESI: First On-Sky Technology Demonstration for the Dark Energy Spectroscopic Instrument
journal, January 2018

  • Fagrelius, Parker; Abareshi, Behzad; Allen, Lori
  • Publications of the Astronomical Society of the Pacific, Vol. 130, Issue 984
  • DOI: 10.1088/1538-3873/aaa225

The DESI fiber positioner system
conference, August 2016

  • Schubnell, Michael; Ameel, Jon; Besuner, Robert W.
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.2233370

The Dark Energy Spectroscopic Instrument (DESI)
conference, July 2014

  • Flaugher, Brenna; Bebek, Chris
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.2057105

Gemini planet imager observational calibrations VIII: characterization and role of satellite spots
conference, July 2014

  • Wang, Jason J.; Rajan, Abhijith; Graham, James R.
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.2055753

Laser Interferometer Measurement System on the Yale PDS 2020G
journal, January 1986

  • Lee, Jin-Fuw; Tsay, Wean-Shun; van Altena, William
  • Symposium - International Astronomical Union, Vol. 109
  • DOI: 10.1017/s0074180900076634

Fabrication of the DESI Corrector Lenses
text, January 2018

Gemini Planet Imager Observational Calibrations VIII: Characterization and Role of Satellite Spots
text, January 2014

Theoretical studies of the effects of grain noise on photographic stellar astrometry and photometry
journal, November 1983

  • Lee, J. -F.; van Altena, W.
  • The Astronomical Journal, Vol. 88
  • DOI: 10.1086/113460

Fabrication of the DESI corrector lenses
conference, July 2018

  • Brooks, David; Miller, Timothy N.; Besuner, Robert W.
  • Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
  • DOI: 10.1117/12.2312949

Non-axisymmetric Aberration Patterns from Wide-field Telescopes Using Spin-weighted Zernike Polynomials
journal, February 2018

  • Kent, Stephen M.
  • Publications of the Astronomical Society of the Pacific, Vol. 130, Issue 986
  • DOI: 10.1088/1538-3873/aaa6b8
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    Figures / Tables found in this record:

    Table 1 (p. 2)table
    Figure 1 (p. 3)figure
    Figure 2 (p. 3)figure
    Table 2 (p. 3)table
    Figure 3 (p. 4)figure
    Figure 4 (p. 4)figure
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    Figure 6 (p. 6)figure
    Table 3 (p. 6)table
    Figure 7 (p. 7)figure
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