Difference between revisions of "Run Plan"
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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. Move chamber to +3mm, 2mm, 1mm, -1mm, -2mm, -3mm. | + | sense wires. Move chamber to +3mm, 2mm, 1mm, 0, -1mm, -2mm, -3mm. |
| Line 40: | Line 40: | ||
o With the canonical settings. Positions (reckoned in mm) ''x'': 50, 25, 0 ; ''y'': 2, 0, -2, | o With the canonical settings. Positions (reckoned in mm) ''x'': 50, 25, 0 ; ''y'': 2, 0, -2, | ||
| + | |||
| + | |||
| + | '''SWAP METALICA and PLASTICA'''. | ||
| + | |||
| + | o Repeat measurements. | ||
Revision as of 18:37, 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 -- BRICK OUT
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 +3mm, 2mm, 1mm, 0, -1mm, -2mm, -3mm.
Efficiency tests + charge/evt (canonical settings)
o Positions (reckoned in mm) x: 25, 20, 15, 10, 5, 0 ; y: 3, 2, 1, 0, -1, -2, -3.
Run -- BRICK IN
o With the canonical settings. Positions (reckoned in mm) x: 50, 25, 0 ; y: 2, 0, -2,
SWAP METALICA and PLASTICA.
o Repeat measurements.