Abstract
The Apache Point Observatory Galactic Evolution Experiment (APOGEE) will use a dedicated 300-fiber, narrow-band (1.5-1.7 micron), high resolution (R∼30,000), near-infrared spectrograph to survey approximately 100,000 giant stars across the Milky Way. This survey, conducted as part of the Sloan Digital Sky Survey III (SDSS III), will revolutionize our understanding of kinematical and chemical enrichment histories of all Galactic stellar populations. The instrument, currently in fabrication, will be housed in a separate building adjacent to the 2.5 m SDSS telescope and fed light via approximately 45-meter fiber runs from the telescope. The instrument design includes numerous technological challenges and innovations including a gang connector that allows simultaneous connection of all fibers with a single plug to a telescope cartridge that positions the fibers on the sky, numerous places in the fiber train in which focal ratio degradation must be minimized, a large (290 mm x 475 mm elliptically-shaped recorded area) mosaic-VPH, an f/1.4 sixelement refractive camera featuring silicon and fused silica elements with diameters as large as 393 mm, three near-within a custom, LN2-cooled, stainless steel vacuum cryostat with dimensions 1.4 m x 2.3 m x 1.3 m.
Original language | English (US) |
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Title of host publication | Ground-Based and Airborne Instrumentation for Astronomy III |
Edition | PART 1 |
DOIs | |
State | Published - 2010 |
Event | Ground-Based and Airborne Instrumentation for Astronomy III - San Diego, CA, United States Duration: Jun 27 2010 → Jul 2 2010 |
Publication series
Name | Proceedings of SPIE - The International Society for Optical Engineering |
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Number | PART 1 |
Volume | 7735 |
ISSN (Print) | 0277-786X |
Other
Other | Ground-Based and Airborne Instrumentation for Astronomy III |
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Country/Territory | United States |
City | San Diego, CA |
Period | 6/27/10 → 7/2/10 |
Keywords
- APOGEE
- SDSS III
- VPH
- fiber optics
- high-resolution
- near-infrared
- spectrograph
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering