Main INDEX
Monthly INDEX
PREV
NEXT
User name M Jones
Log entry time 13:20:20 on August 03, 2006
Entry number 177146
This entry is a followup to: 177117
keyword=Change to hydogen elastic points
I found from the target part of the Hall A web page that the diameter
of the target is 2.5in. So the protons will pass through the entire
target for angles =atan(3.175/7.5) = 23 degrees from the middle and
12 degrees from the back. So we will have to have a good model of
the target and dE/dX. So for 18.84 degrees we decided to stop the kin8
point and move to the kin9 point. We will add a kin10a which is 2% lower
than kin10 ( which becomes the delta=0 point). Also for the first hydrogen
setting we need to add a point 3a which is 2% lower than kin3. Given the
width of the target it probably best to skip the next "-2%" hydrogen
kin 15 point at 23 degrees and add a point kin17a which is 2% lower than
kin17.
A copy of this log entry has been emailed to: gilman@jlab.org,strauch@jlab.org,sarty@jlab.org,brads@jlab.org