NASA NTRS · 19740043161
Negative affinity X-ray photocathodes
Abstract
A new X-ray image intensifier is described. The device should eventually have a quantum efficiency which is an order of magnitude greater than that of presently available high spatial resolution X-ray detectors, such as microchannel plates. The new intesifier is based upon a GaAs crystal photocathode which is activated to achieve negative electron affinity. Details concerning the detector concept are discussed together with the theoretical relations involved, X-ray data, and optical data.
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Vanspeybroeck, L., Kellogg, E., Murray, S., Duckett, S.. 1974-02-01. Negative affinity X-ray photocathodes. https://ntrs.nasa.gov/citations/19740043161
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