All runs but the last one
Only the last run (run_111009_10.txt)
The beam was bunched at nearly 20 ns, with spill lenght nearly 1 ns.
65cc min Ar 16cc min CO2 corresponding to 80/20 admixture
| Run | Mixture (cc/min) | Comments | HV | LV | N evts |
|---|---|---|---|---|---|
| 1 | 65/30 | scint: 3/4 not connected | 2.0 kV | 1 V | 147 k |
| 2 | - | all scint connected | - | - | 805 k |
| 3 | - | all scint connected | 2.2 kV | - | 600 k |
| 4 | - | all scint connected | 2.1 kV | - | 975 k |
| 5 | - | No scint | 1.9 kV | - | 1.055 M |
| 6 | - | all scint conn | 1.8 kV | - | 905 k |
| 7 | 65/16 | all scint conn | 1.8 kV | - | 870 k |
| 8 | - | all scint conn | 1.9 kV | - | 550 k |
| 9 | - | all scint conn | 2.0 kV | - | 1 M |
| 10 | - | all scint conn | 2.1 kV | - | 840 k |
From 101009_* to 111009_* change of cabling/connections. ADC moved from 1st start counter to DUMP and recabled the chamber. 1 chamber channel resurrected….
| Run | Mixture (cc/min) | Comments | HV | LV | N evts |
|---|---|---|---|---|---|
| 1 | 65/40 | All conn | 2.1 kV | 1.11 V | 660 k |
| 2 | - | - | 2.2 kV | - | 695 k |
| 3 | - | 2mm of Al 1.15mm from ST1 | - | - | 3.16 M |
| 4 | - | All conn (no Al) | 2.3 kV | - | 705 k |
| 5 | - | - | 2.4 kV | - | 570 k |
| 6 | 65/50 | - | 2.4 kV | - | 350 k |
| 7 | - | - | 2.5 kV | - | 275 k |
| 8 | - | - | 2.3 kV | - | 240 k |
| 9 | - | - | 2.2 kV | - | 210 k |
| 10 | - | High rate | 2.3 kV | - | 145 k |
Change of LV from 1 V to 1.11 V changes gain from 2*10^6 to 5*10^6 [adb]