The DESI fiber system
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 sq deg 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 will describe the design and performance of the DESI fiber system. This includes 5000 custom positioner fiber assemblies, spliced to 10 fiber cables terminated in a slit array.
- Publication:
-
Ground-based and Airborne Instrumentation for Astronomy VII
- Pub Date:
- July 2018
- DOI:
- 10.1117/12.2312176
- Bibcode:
- 2018SPIE10702E..7OP