In situ measurement of "open window" electron multipliers' gain

Andrea Murari, Luca Lotto, S. Costa, I. Molon

Research output: Contribution to journalArticle


In this paper, a simple electronic method for the in situ measurement of the multiplier gain 〈g〉 of "open window" electron multipliers is described. The parameter 〈g〉, which is measured for the first time for these devices, is of great relevance because, if the geometrical factor F is known, it allows to determine the total multiplier gain 〈G〉 of the detectors. In its turn, the total multiplier gain 〈G〉, together with the quantum efficiency η, provides a complete absolute calibration of the multiplier. The use of a software multichannel analyzer (MCA), as proposed in this implementation of the calibration method, increases not only the good value, but also the versatility of the technique, rendering it a simple routine procedure. For one multiplier, suitably modified, it has also been possible to measure, in addition to the electron gain 〈g〉, the geometrical factor F and the total multiplier gain 〈G〉 directly. The agreement between these measurements confirms the validity and the interest of the technique adopted to determine 〈g〉. Moreover, the reported tests prove that with a simple modification of the multiplier, which could be simply implemented by the manufacturers, a complete characterization of the geometrical and electrical properties of the device would be possible in a relatively simple way. © 2005 IEEE.
Original languageEnglish
Pages (from-to)1227 - 1234
Number of pages8
JournalIEEE Transactions on Instrumentation and Measurement
Issue number3
Publication statusPublished - Jun 2005
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering

Cite this