OmegaCAM cooling system :Jean Louis Lizon, Armin Silber

GOALS:• Optical wide-angle camera OmegaCAM for the 2.6-m

VLT Survey Telescope (VST)• Cassegrain focus, and the focal plane is populated with a

mosaic of thirty-two 2K x 4K CCDs plus 4 virtually identical auxiliary CCDs for autoguiding and image analysis.

• Operating temperature : 155 K. • Detectors total area: 630 cm2. → ~ 30 Watts direct

radiation from the window and a total heat load of 60W.

–→ Autonomous LN2 cooling system

OmegaCAM cooling system :Jean Louis Lizon, Armin Silber