MegaCam: the new Canada-France-Hawaii Telescope wide-field imaging camera
2003
MegaCam is an imaging camera with a 1 square degree field of view for
the new prime focus of the 3.6 meter Canada-France-Hawaii Telescope. This instrument will mainly be used for large deep surveys ranging
from a few to several thousands of square degrees in sky coverage and
from 24 to 28.5 in magnitude. The camera is built around a CCD
mosaic approximately 30 cm square, made of 40 large thinned CCD
devices for a total of 20 K x 18 K pixels. It uses a custom CCD
controller, a closed cycle cryocooler based on a pulse tube, a 1 m
diameter half-disk as a shutter, a juke-box for the selection of the
filters, and programmable logic controllers and fieldbus network to
control the different subsystems. The instrument was delivered to the
observatory on June 10, 2002 and first light is scheduled in early
October 2002.
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