Difference between revisions of "Qweak Elastic GEM Profile"

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the 100 cm target is at Z = -650 cm
 
the 100 cm target is at Z = -650 cm
 
If <math>\theta = </math> 6 degrees and Z = -528-(-650)+50 = 122 cm then Y = 12.8 cm
 
If <math>\theta = </math> 6 degrees and Z = -528-(-650)+50 = 122 cm then Y = 12.8 cm
 +
 
If <math>\theta = </math> 6 degrees and Z = -558-(-650)-50 = 122 cm then Y = cm
 
If <math>\theta = </math> 6 degrees and Z = -558-(-650)-50 = 122 cm then Y = cm
  
  
 
If <math>\theta = </math>11 degrees and Z = -528-(-650)+50 = 122 cm then Y = 12.8 cm
 
If <math>\theta = </math>11 degrees and Z = -528-(-650)+50 = 122 cm then Y = 12.8 cm
 +
 
If <math>\theta =</math> 11 degrees and Z = -528-(-650)+50= 14 cm
 
If <math>\theta =</math> 11 degrees and Z = -528-(-650)+50= 14 cm
  

Revision as of 15:34, 14 May 2009

Elastic electron scattering profile at Z=-528 and Z=-558, the two limits of the GEM keep out zone.

the 100 cm target is at Z = -650 cm If [math]\theta = [/math] 6 degrees and Z = -528-(-650)+50 = 122 cm then Y = 12.8 cm

If [math]\theta = [/math] 6 degrees and Z = -558-(-650)-50 = 122 cm then Y = cm


If [math]\theta = [/math]11 degrees and Z = -528-(-650)+50 = 122 cm then Y = 12.8 cm

If [math]\theta =[/math] 11 degrees and Z = -528-(-650)+50= 14 cm

Profiles generated by Neven using Katherine's Euclid file (Media:qweak_gw_5-dec-07.euclid.txt) representing the collimator design dated 8/8/07 from Paulo's Drawing "Hall -V QWEAK EXPERIMENT COLLIMATOR BUNKER SETUP UPSTREAM CLEANUP COLLIMATOR" # 67503-E-00021.


Qweak E-profile Z=-528 12-07.jpg Qweak E-profile Z=-558 12-07.jpg

The previous profiles prior to this latest change in the collimator when overlayed on top of each other looked like:

Qweak E-profile 2006.gif

The electron profile closest to the beam pipe center appears to be about 8 cm away from the beam pipe center now instead of about 7.5 cm.

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