Comparison of statistics taken with Q2 and Q6 in runs: data1x/MSUJune2012/Run252 ro Run271
On the scalers Q2 rate was 2.5 and Q6 rate 1.5 kHz.
These are the counts seen in the full quad in a 15 minutes acquisition (note that 500 kB/s is the minimum allowed):
| mode | readout limit | Q2 | Q6 | deadtime |
|---|---|---|---|---|
| validate | 500 | 15M | 8.5M | 61% |
| validate | 700 | 1.3M | 14.5M | 29% |
| validate | 1000 | 2.6M | 15.5M | 29% |
| validate | 1500 | 0.8M | 15.8M | 28% |
| validate | 2000 | 0.7M | 13.5M | 26% |
| TTCS | 500 | 17.1M | 12.1M | |
| TTCS | 2000 | 21.5M | 17.8M |
This means that as we move from 500 we can lose more than 90%