Conclusions and Then Continuation
We concluded that the gain of the new 4th generation PMT actually increased slowly while it was being pulsed for 50 equivalent years
This is rather odd. The PMT’s performance is seemingly improving as it ages?!
Possible explanation: charge may be collecting on the walls of the PMT, thus creating an electric field that focuses the e-
We then proceeded to perform more aging experiments on older 3rd generation PMTs that we had available in our lab