Collimator
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.
I can then compare the dimensions on this version with the version I recieved back in 12/3/06.
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.
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