Multiple design challenges for cryo optics
It is a golden instrument, in more ways than one. NIRcam, the Near-Infrared Camera for the James Webb Space Telescope (JWST), is wrapped in a gold insulating foil, the better to maintain its operating temperature of 35K (-397F). But it also will play a golden role for the three other instruments on the $8 billion mission, which is to put astronomy's largest orbiting observatory into service in 2018. NIRcam is due to leave California shortly for NASA's Goddard Space Flight Center for ...
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