Physics
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993kfnt....9...89n&link_type=abstract
Kinematika i Fizika Nebesnykh Tel (ISSN 0233-7665), vol. 9, no. 2, p. 89-93.
Physics
Noise Spectra, Photomultiplier Tubes, Signal To Noise Ratios, Temperature Dependence, Gallium Arsenides, Light Sources, Photocathodes
Scientific paper
The sensitivity of the FEU-157 photomultiplier with a GaAs photocathode in the wavelength range 700-900 nm is higher than that of the widely used FEU-79 photomultiplier. When operated with faint light sources, however, the noises of the former at room temperatures exceed the useful signal. The noises could be reduced by cooling the photocathode. A device is described which has been designed for studying the temperature dependence of FEU-157 noise characteristics in the single-electron mode. Results of measurements are given. It is concluded that, for observations of faint light sources, the photocathode must be cooled to about -30 C.
Fomenko A. A.
Nevodovskij P. V.
Sosonkin M. G.
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