Abstract
A hybrid intensified CCD tube, based on a moulded thinned backside-bombarded CCD sensor (604 × 288 pixels) has been achieved for applications of very low light level imaging and two-dimensional photon counting. The CCD is a modified version of the Philips NXA 1011 FT sensor, moulded in a ceramic/glass material before thinning, so that the sensitive area remains flat, frontside supported and thermally stabilized. Materials are fully compatible with ultra-vacuum techological constraints and with the presence of alkalis incorporated during the photocathode growing process. This paper deals with some results of electron detection experiments: EBS gain vs incident energy, gain fluctuation and noise behaviour, pulse height distribution and image quality. Thanks to the realization of stable tube prototypes, we have used such a device in adaptive optics as a wavefront sensor working in photocounting mode.
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