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Type Deconihout, B.; Vurpillot, F.; Bouet, M.; Renaud, L.
  Publication Improved ion detection ef&#64257;ciency of microchannel plate detectors Volume Journal Article
Pages 2002
  Abstract Review of Scientific Instruments  
  Corporate Author Rev. Sci. Instrum.  
Publisher 73  
Editor 4
  Summary Language 1734-1740 Series Editor  
Abbreviated Series Title The knowledge of the detection ef&#64257;ciency of the microchannel plate is of upmost importance in many applications using this type of particle detector. However, few attempts have been made to measure the absolute value of the detection ef&#64257;ciency of microchannel plates. In this article, a new way of accurately measuring the absolute value of the detection ef&#64257;ciency is described. When particles hit the detector in the interchannel web of the microchannel plate, secondary electrons are generated. These secondary electrons can be returned to neighboring channels by means of an electric &#64257;eld applied at the front face of the detector. The resulting increase in the detection ef&#64257;ciency has been quanti&#64257;ed using the absolute measurement of the detection ef&#64257;ciency. It is found that the value of the returning &#64257;eld has to be carefully set in order to prevent detection artifacts that may lead to a wrong estimation of the detection ef&#64257;ciency. In the best conditions, the detection ef&#64257;ciency increase reaches 40%.
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no NU @ karnesky @ 806
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