User name A. Camsonne
Log entry time 21:58:47 on January21,2008
Entry number 226646
keyword=A2 ADCs (continued) run 3134PMT 25 ( histo number 24 ) has low signal, I remember looking with the scope that I had to put it at 1600 V to see cosmics while other had signal of about 5 mV around 100 V.
I previous run at 1700 V and 1800V I did not see much change of amplitude will check previous data to see if I can increase more the HV since it is already pretty high. I will also increase HV for other PMT to get the single photoelectron peak around channel 50 as Bogdan advised
FIGURE 1
FIGURE 2
