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.  
  
  
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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,
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 +
 +
'''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.