User name R. Michaels
Log entry time 02:28:37 on May27,2004
Entry number 123266
This entry is a followup to: 123245
keyword=T1 instability studyUsing scaler_history.dat file. Fig 1 shows 3 things:
1) Top plot is ratio of "T1-Left" to charge versus run # for
recent runs where the beam is on (cut on current in scalers)
where "T1-Left" means T1 is measured on Left Arm Scalers.
2) Middle plot is same for T1 measured on Right Arm Scalers.
3) Bottom plot is same for T3 measured on Left Arm Scalers.
From this we conclude:
1. Before run 1256 T1-Left was ok. T1-Right always ok.
2. Starting with run 1256 (9 pm) T1-Left started double counting.
Will fix it at the next access. Like I said, probably a bad
cable connector or flakey module.
FIGURE 1
