Log entry time 08:59:33 on February 11, 2011

Entry number 346362

I notice that even thought we have cleaner TDC distributions for s1 and
s2m, I still can see that there are several channels that have two or
three peaks. I check the s1 TDC signals one by one and found that s1#1L
has many after pulses. I checked directly the s1 signals from PMT and
found that it is very noisy. I tried to reduce its HV to see whether it
is better or not but even I reduce 100V,it still look not good.


I save the figure from the scope but don't know where to get the picture