05/13/2011 timing test
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Set up like that:
The voltages and thresholds are:
| PMT voltage, V | threshold, mV | discr. width, ns | |
|---|---|---|---|
| PS1 | -1500 | -80 | 100 |
| PS1 | -1500 | -80 | 100 |
| n's | -1500 | -200 | 10 |
Let's do the timing test. The distances are between PS1+PS2 and n's PMT. The time is time difference between PS1(PS2) and n's detector signals
| N | 80 cm | 70 cm | 60 cm | 50 cm | 40 cm | 30 cm | 20 cm | 10 cm | 0 cm |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 17.6 ns | ||||||||
| 2 | 17.6 ns | ||||||||
| 3 | 18.4 ns | ||||||||
| 4 | 17.6 ns | ||||||||
| 5 | 17.6 ns | ||||||||
| 6 | 17.6 ns | ||||||||
| 7 | 18.0 ns | ||||||||
| 8 | 16.8 ns | ||||||||
| 9 | 9.6 ns | ||||||||
| 10 | 17.2 ns | ||||||||
| avg |