New Developments in Hybrid Photon Detectors

Details New Developments in Hybrid Photon Detectors New Developments in Hybrid Photon Detectors

1998-10-02

arxiv.org/abs/physics/9810004v1

Physics

Instrumentation and Detectors

Presented at the conference "New Detectors, 36th Workshop of the INFN Eloisatron Project, Ettore Majorana Centre For Scientifi

Scientific paper

New developments in HPD design are presented, triggered by applications in high energy physics and astrophysics. The presented HPD designs are based on three innovations. (i) In order to achieve the highest possible surface coverage in a RICH detector, we introduced a photoelectron focussing method which is efficient to the periphery of the photocathode. (ii) To prevent positive ion feedback in HPDs, we introduced a permanent potential barrier in front of the anode. (iii) To replace a transmittive by a reflective photocathode, we arrived at a conceptually new HPD design with surprisingly good imaging characteristics, high quantum efficiency and low cost.

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