Collimator

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JLAB Collimator design 6/14/07

On June 14, 2007, I went to Paulo Dedeiros's office on the 5th floor of the ARC cubicle 43 (500-43). I got him to output the pdf file below which describes the back side of the first collimator in Qweak.

File:Collimator-06-14-07.pdf
Collimator-06-14-07 SideView.jpgCollimator-06-14-07 BackSide.jpg


I can then compare the dimensions on this version with the version I recieved back in 12/3/06. Colimator 12-03-06.jpg

summary

I do not see any major changes so I conclude that the collimator has not changed and the montecarlo results for the profiles of elastic electrons are still valid.

JLAB Collimator design 6/14/07

From Paulo's Drawing "Hall -V QWEAK EXPERIMENT COLLIMATOR BUNKER SETUP UPSTREAM CLEAUP COLLIMATOR" # 67503-E-00021 dated 8/8/07 I saw the following description of what I believe is the backside of collimator 1.

Collimator-11-29-07 BackSide.jpg

Summary

It looks like the collimator has a new lower radial limit of 7.03 cm compared with the previous limit of 6.2 cm shown in the