Photoelectron backscattering in vacuum phototubes

Details Photoelectron backscattering in vacuum phototubes Photoelectron backscattering in vacuum phototubes

2006-01-20

arxiv.org/abs/physics/0601157v1

Nucl.Instrum.Meth. A567 (2006) 12-16

Physics

Instrumentation and Detectors

Scientific paper

10.1016/j.nima.2006.05.047

In this article we describe results of a photoelectron backscattering effect in vacuum phototubes: classical photomultipliers (PMT) and hybrid phototubes (PH). Late pulses occurring in PMTs are attributed to the photoelectron backscattering and distinguished from pulses due to an anode glow effect. The late pulses are measured in a number of PMTs and HPs with various photocathode sizes covering 1-50 cm range and different types of the first dynode materials and construction designs. It is shown that the late pulses are a generic feature of all vacuum photodetectors - PMTs and PHs and they don't deteriorate dramatically amplitude and timing responses of vacuum phototubes.

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