Gain stabilization of scintillation and Cerenkov spectrometers at high counting rates

M. A. Kovash, S. L. Blatt

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


A photomultiplier gain stabilization system, capable of operation at rates well over 5×104 pulses/s, is described. Pile-up and dead-time effects, which hamper conventional systems at such rates, are minimized through the use of a fast-gated charge sensitive integrator directly coupled to the photomultiplier anode. Deviations in the time-averaged response to a reference light pulser are fed back to control the high-voltage supply. Rapid fluctuations due to variations in average dynode current are reduced through the use of active voltage divider chains. Stability, tested with a large NaI(Tl) crystal viewed by five photomultiplier tubes, is better than 0.7% over 24 h, and for counting rates charging from a few hundred counts/s to over 2×105 counts/s.

Original languageEnglish
Pages (from-to)113-119
Number of pages7
JournalNuclear Instruments and Methods
Issue number1
StatePublished - Jul 1 1979

Bibliographical note

Funding Information:
* Work supported in part by the U.S. National Science Founda-tion.

Copyright 2014 Elsevier B.V., All rights reserved.

ASJC Scopus subject areas

  • General Medicine


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