X hits on this document

146 views

0 shares

0 downloads

0 comments

34 / 52

Scintillation Counters and Photomultiplier Tubes

           Definition of Photomultiplier Tube Gain

= average number of electrons generated at each dynode

  stage

Typically,  = 4 , but this depends on dynode material

  and the voltage difference between dynodes

n = number of multiplication stages

Photomultiplier tube gain = n

For n = 10 stages and  = 4 , gain = 410 = 1 107

This means that one electron emitted from the

  photocathode (these are called “photoelectrons”)

  yields 1 107 electrons at the signal output

Document info
Document views146
Page views146
Page last viewedSun Dec 11 05:05:27 UTC 2016
Pages52
Paragraphs715
Words2574

Comments