> Another puzzle is the difference between mSC and mSC*mPC. > It is pretty dramatic for the mu+ kicked runs (around > 23200). What's going on there? Is mPC not efficient? > Or a timing problem? Dear Peter, Following our phone call this afternoon, I have looked at the TPC drift distribution with and without a muPC1 cut. Based on run 23572, the plot is attached. The number of events between 0 and 25 microseconds in the muSC*muPC1 histogram is 79% of the number in the muSC-only version. The timing problem mentioned previously has already been corrected in this plot. This number is compatible with the ratio of the curves in the online efficiency trend. Thanks, -- Fred -- Fred Gray / Visiting Postdoctoral Researcher -- -- Department of Physics / University of California, Berkeley -- -- fegray@berkeley.edu / phone 510-642-2438 / fax 510-642-9811 --
Attachment:
muPC_check.png
Description: PNG image
