Edelstein, J;
Jelinsky, P;
Levi, M;
Tarle, G;
Brooks, D;
(2018)
The Desi Spectrograph System and Production.
In:
Proceedings of the Ground-based and Airborne Instrumentation for Astronomy VII: 107027G (2018).
SPIE: Austin, Texas, USA.
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Abstract
The Dark Energy Spectroscopic Instrument (DESI) is a project in construction to measure the expansion history of the Universe using the Baryon Acoustic Oscillation technique. The spectra of 35 million galaxies and quasars over 14,000 square degrees will be measured during the life of the experiment. A new prime focus corrector for the KPNO Mayall telescope will deliver light to 5000 fiber optic positioners. The fibers in turn feed ten broad-band spectrographs covering a 360 - 980 nm passband with a spectral resolution (λ/Δλ) between 1500 and 4000. The spectrograph uses two dichroic beam splitters to separate the flux among three spectral cameras, each with a volume phase holographic grating and lens system that focuses onto a charge coupled device detector. We describe the spectrograph, its system requirements, design and construction.
| Type: | Proceedings paper |
|---|---|
| Title: | The Desi Spectrograph System and Production |
| Event: | SPIE Astronomical Telescopes + Instrumentation, 2018 |
| ISBN-13: | 9781510619579 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.2311821 |
| Publisher version: | https://doi.org/10.1117/12.2311821 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | DESI, dark energy, multi-object spectrograph, Mayall telescope |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10060428 |
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