Difference between revisions of "Run Plan"
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| Line 5: | Line 5: | ||
Set coincidence gate of two paddles to fall within 15-20 ns | Set coincidence gate of two paddles to fall within 15-20 ns | ||
| − | Verify | + | Verify that scalars are set: singles from front and back + coincidence. |
| + | |||
| + | The zero point is where the laser beam intersects the feedthrough trumpet. I figure at | ||
| + | 50 Hz, we can get ample statististics for a 2-min run at each setting. This is to be | ||
| + | confirmed by the scalars. | ||
| + | |||
| + | ''x'': along wire and ''y'': vertical distance from sense wire 4. | ||
| − | |||
'''Run''' | '''Run''' | ||
| Line 22: | Line 27: | ||
guard +688 to +750V in steps of 12.5V | guard +688 to +750V in steps of 12.5V | ||
| − | o Once we find the "sweet spot" fix settings of field, guard, and | + | o Once we find the "sweet spot" fix settings of field, guard, and |
| − | sense wires. | + | sense wires. move chamber to +1mm, -1mm, and -2mm. Verify signals. |
| + | |||
| + | Efficiency tests + charge/evt | ||
| + | |||
| − | o | + | o Positions (reckoned in mm) ''x'': 20, 15, 10, 5, 0 ; ''y'': 3, 2, 1, -1, -2, -3. |
Revision as of 18:22, 5 January 2008
Run Plan.
Setup.
Set coincidence gate of two paddles to fall within 15-20 ns
Verify that scalars are set: singles from front and back + coincidence.
The zero point is where the laser beam intersects the feedthrough trumpet. I figure at 50 Hz, we can get ample statististics for a 2-min run at each setting. This is to be confirmed by the scalars.
x: along wire and y: vertical distance from sense wire 4.
Run
Plateauing
o Move chamber horizontally to 5cm.
o Move chamber up 2mm
o Set: sense: +1375 to +1550V in steps of 25V field -688 to -750V in steps of 12.5V guard +688 to +750V in steps of 12.5V o Once we find the "sweet spot" fix settings of field, guard, and sense wires. move chamber to +1mm, -1mm, and -2mm. Verify signals.
Efficiency tests + charge/evt
o Positions (reckoned in mm) x: 20, 15, 10, 5, 0 ; y: 3, 2, 1, -1, -2, -3.