BigBite E-plane TDC calibration:
Mean speed-of-light and offset determination:
Here are the results of the speed of light calibration. I tried to determine mean
speed of light in E-plane paddle:
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E-plane TDC : Motivation for Calibration :
I would like to calibrate TDCs to improve resolution of the TDC vs. momentum plots.
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The bananas that we observe in the TOF vs. TDIFF plots are direct consequence of
our trigger mechanism. We should always have in mind, that time is measured of a signal (L or R),
that comes last in to the trigger. Here is a proof of that:
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E-plane TDC Calibration Problems:
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E-plane TDC Calibration Results
Here are the results of my calibratio. I aligned one of the paddles (one with the biggest self-timed
section ) to t=-350ns. I corrected the other one, so that R-L is 0 at FpY = 0.
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EDTM Events:
Where does the additional line seen in paddle #0 results come from. These are the EDTM
events. We see them only in the first paddle because of the hit cuts ( look only at the
first hit) that we use. When EDTM comes, it triggers all paddles, and hit in paddle
#0 is stored as the first hit:
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Last modified: 02/09/11
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