User name C.Ferdi
Log entry time 12:35:49 on October16,2004
Entry number 134405
keyword=Gain variation in % 10 days (previous-latest)
Gain variation in % 10 days 10/6-10/16 (previous-latest)
The 1st picture (132 plots) : Evolution per day (10 days)
-scale is between -5% and 12 % ,
-1st point of each plot is 0 : beginning of gain variation measurement,
- The others points : gain variation day after day, compared to the 1st point.
(10 points not 11 points, 10/15 LED run bad)
The 2nd picture : Evolution between the 1day 10/6 and the last day 10/16
Always the same PMTs to watch carefully :
- 6 (7%),50(6%),61(6%) and OF COURSE 121 at 11.4% now.
HV PMT121 Changed 10/16 in the morning :
-551V to 560V to compensate the 11.4% gain variation
-DVCS production kin#2 with this new HV (in the runlist)