6.2 Mosaic Alignment within Cryostat

The orientation of the chips in the cryostat is orthogonal to a normal EEV 42-80 camera ; the long axis is parallel to the primary dispersion axis when used at UES on the William Herschel telescope.



The cryostat window had a thickness of 5mm. The distance from the front face of the window to the surface of the CCD was measured using a travelling microscope.