[Halld-cpp] [New Logentry] Preliminary MWPC efficiency estimation
ilarin at jlab.org
ilarin at jlab.org
Tue Aug 2 23:05:02 EDT 2022
Logentry Text:
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Here is very preliminary estimation of MWPC efficiency based on digihit bank analysis. It has some systematic which has not been investigated yet.
The MWPC digihit selection criteria are: peak value>70 & integral value>600 and time value between 250 and 600.
Here are statistics from 22 runs. Muon candidate tracks with momentum > 4GeV have been selected for the analysis.
Deviation values (sigmas of gaussian fit) for the track projection distance to the chamber closest wire for 6 MWPCs from 1st to 6th are: 2.3, 2.6, 2.9, 3.6, 4.9, 5.15cm. The selected tracks should have been matched with FCAL hit within 3cm from the hit module center.
Efficiency plots have been made against the distance between track projection to the chamber Z-plane point and the coordinate axis along the chamber wire direction. Bin size is 1cm. The selected tracks should have also been matched with all other 5 MWPCs, i.e. it should be active wire within 2 sigmas of the track projection. The studied chamber has been counted as efficient if it has is a hit within 5 sigmas from the track projection, and as inefficient otherwise.
The attached plots are for the track projection distance to FCAL hit in X and Y direction; to any hit in all MWPCs, to the closest hit in all MWPCs, and finally plot for the inefficincy.
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This is a plain text email for clients that cannot display HTML. The full logentry can be found online at https://logbooks.jlab.org/entry/4023548
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