1. Beam File Analysis Carl Goodrich 10/9/07

2. Beam File Data

3. Goal Look for cross-talk –Specifically in unexpected strips +2 nd neighbors inner-outer cross talk Must look at each event separately

4. Beam Location Use R data to exclude events where the beam overlaps between the inner and outer strips. In R detector- if the beam overlaps between quadrants, there should be two spikes. good bad ugly

5. Inner-Outer Strip Cross Talk CMs Signal 0 682 683 2048 Inner StripsOuter Strips Phi Detectors If “good” beam: will we see this? Test pulse only showed inner-outer cross talk in 3 out of 96 channels 2 nd neighbor of ch. 4 and ch. 23 in C 1 links 1 st neighbor of ch. 23 in C 2 links

6. Concerns Similar to the test pulse data, we are limited by the location of the signal –Possible lack of “good” data –Will we be able to compare to TP? Only shows cross talk between inner and outer strips –Is there a theoretical distribution for the beam that could be subtracted?

7. Another approach Reconstruct the event (2D or 3D) Each module => ~600k pixels –Multiply the R and Phi signal and map More of a visual than quantitative approach