Month: November 2016

The barrel will hold the lenses and optics for DESI, which will map one-third of the night sky. To create an accurate map, the barrel’s pieces must be accurately assembled to within 20 micrometers. Dial Machine of Rockford, Illinois, manufactured

This Fermilab team is currently assembling the barrel for the Dark Energy Spectroscopic Instrument, a project being led by Lawrence Berkeley National Laboratory. From left: Jorge Montes, Mike Roman, David Butler, Gaston Gutierrez, Giuseppe Gallo, Otto Alvarez. Photo: Reidar Hahn

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