Photomultiplier Gain Stabilization Circuit
- 1 September 1963
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 34 (9), 997-1001
- https://doi.org/10.1063/1.1718673
Abstract
A simple method is described for the gain stabilization of a photomultiplier in which the stabilization system does not interfere with the fast pulse spectrum to be measured. The functioning principle consists in sending a low frequency (77 Hz) and very low intensity light pulse, which gives a modulation of the photomultiplier thermionic noise, on the photocathode together with the scintillation light. The modulation frequency is then selected on the anode by a special filter. The signal obtained in this way is used to trigger a feedback circuit, which makes the photomultiplier gain constant by suitably varying its voltage.Keywords
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