Story URL: http://news.medill.northwestern.edu/chicago/news.aspx?id=182835
Story Retrieval Date: 12/9/2013 1:43:04 AM CST
The Dark Energy Survey is an international collaboration of 120 scientists and engineers from 23 organizations. It relies on a camera made from pieces fabricated all over the world and shipped to Batavia for test-runs at Fermilab.
• The five filters of the camera, which will give the images color and are the largest ever produced, were made by Asahi Spectra, headquartered in Tokyo, Japan.
• The shutter is the largest of its kind and was manufactured by Bonn University in Germany.
• The University of Michigan provided the filter changer.
• The hexapods, which provide the focus and alignment system, were made by ADS International in Italy.
• The lenses were cast by Corning Precision Lens in New York and polished by SESO in France, and assembled into the corrector in England. The largest of these lenses will weigh 380 pounds.
• The Lawrence Berkeley National Laboratory in California developed the CCDs, the digital image sensors.
• Collaborators in Barcelona and Madrid contributed the electronics for the CCD readout boards.
• Ohio State University and The University of Illinois at Urbana-Champaign developed the instrument control software.
• Fermilab was the site of assembly and testing of the camera.