Tweet this The APEX II detector is based on a brand new model of the largest scientific grade CCD chip manufactured - the Fairchild Imaging Systems 486 4K CCD.

We describe our design for a modular dewar built to house the 4096x4096 CCD mosaic. The dewar splits into two parts— a camera head housing the mosaic array, and a cryogenic back containing a 3 liter ...

In principle, this makes the CCD insensitive to radiation with a wavelength larger than 1.1 μm as the charge-generation region (silicon) becomes transparent.