Overview of the Dark Energy Spectroscopic Instrument
Paul Martini, Stephen Bailey, Robert W. Besuner, David Brooks, Peter, Doel, Jerry Edelstein, Daniel Eisenstein, Brenna Flaugher, Gaston Gutierrez,, Stewart E. Harris, Klaus Honscheid, Patrick Jelinsky, Richard Joyce, Stephen, Kent, Michael Levi, Francisco Prada, Claire Poppett
TL;DR
The Dark Energy Spectroscopic Instrument (DESI) aims to map the universe's expansion by measuring spectra from millions of galaxies and quasars, utilizing advanced instrumentation on the Mayall telescope.
Contribution
This paper provides an overview of DESI's instrumentation, technical challenges, and current progress in constructing a large-scale spectroscopic survey for dark energy research.
Findings
Design of a new prime focus corrector for the Mayall telescope
Deployment of 5000 fiber optic positioners for spectral collection
Ongoing progress in instrument construction and project status
Abstract
The Dark Energy Spectroscopic Instrument (DESI) is under construction to measure the expansion history of the Universe using the Baryon Acoustic Oscillation technique. The spectra of 35 million galaxies and quasars over 14000 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. We present an overview of the instrumentation, the main technical requirements and challenges, and the current status of the project.
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