Performance of a photomultiplier at liquid-helium temperature

The performance of a Hamamatsu R7725-mod photomultiplier has been studied at liquid-helium temperature. When cooling from 300 to 8 K, the quantum efficiency decreases by about 10% and the gain by about 30%, afterpulses become less probable, but the dark rate increases, down to the lowest temperature...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2010-09, Vol.621 (1), p.437-442
Main Author: Meyer, H.O.
Format: Article
Language:English
Subjects:
Accelerators
Cooling rate
Gain
Indication
Liquid helium
Multiplier phototubes
Photomultiplier
Photomultipliers
Photon detector
Quantum efficiency
Spectrometers
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Summary:The performance of a Hamamatsu R7725-mod photomultiplier has been studied at liquid-helium temperature. When cooling from 300 to 8 K, the quantum efficiency decreases by about 10% and the gain by about 30%, afterpulses become less probable, but the dark rate increases, down to the lowest temperature measured. There is no indication against using a photomultiplier at liquid-helium temperature.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2010.05.048