In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 45, No. 7R ( 2006-07-01), p. 5990-
Abstract:
Reflectance and photon-to-electron conversion efficiency have been measured for photomultiplier tubes (PMTs; Hamamatsu R878 and 7696) using three-color light-emitting diode (LED) emitting photons with central wavelengths of 470, 525, and 640 nm. The use of a light guide with a refractive index similar to that of a photomultiplier window enabled the measurement at the angle of incidence to a photocathode up to 75°. An appreciably large reflectance and conversion efficiency were obtained at the angles of approximately 45 and 60°, respectively. It was shown that these PMTs work with a higher photon-to-electron conversion efficiency than the quantum efficiency given by the manufacturer in many cases of scintillation counting. The reflectance measured in this study is consistent with that calculated using an optical model, where the photocathode was a thin film with a complex refractive index.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.45.5990
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2006
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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