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Update on CompareTFandDMBLCTs.cc. Analyzer that compares LCTs read out from the Track Finder (input FIFO) with those read out through the EMU data path (TMB to DMB to DDU) Improvements: Bug fixed in output text file for comparing characteristics of LCTs.
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Update on CompareTFandDMBLCTs.cc • Analyzer that compares LCTs read out from the Track Finder (input FIFO) with those read out through the EMU data path (TMB to DMB to DDU) • Improvements: • Bug fixed in output text file for comparing characteristics of LCTs. • Very Brief look at run 4318 shows that some characteristics of LCTs between TF and DMB do not match. • From this very brief look, most common difference is in TMB quality which is off by 2. • Next with this code: • Add summary histograms to code showing percentages of matching chamber by chamber for when the LCT characteristics do not match. • Look into the LCTs that show different characteristics. • Investigate 0.1% mismatch in th enumber of LCTs between TF and DMB.
Update on L1TriggerEfficiency.cc • Analyzer finds LCT efficiencies using the overlap of chambers in phi • Improvements: • Added to the ability to cut on angle of segment with respect to CLCT pattern to investigate its affects on the chamber efficiency. • See next several slides.
Cut on Segment Angle wrt CLCT Pattern i.p. x • Method (part 1 of 2): • Project segment to layer 1 and layer 6 in chamber. • Get the global phi position of segment at both layers, Phi_1 and Phi_6. • Then the change in phi with respect to the change in z is: • Dphi/Dz = Phi_6 – Phi_1 • Note: • Note that in stations 3 and 4 the reverse of layers 6 through 1 wrt the ip is taken into account • When the chamber is near global_phi = 0 (not the case for the slice test chambers), it is also taken into account to substract 2*Pi from Dphi/Dz. z Φ1 Layer 1 Φ6 Layer 6 Top View of CSC (ME1 or ME2) muon
Cut on Segment Angle wrt CLCT Pattern i.p. x • Method (part 2 of 2): • Get the width of the strips (in radians) for the chamber that the segment is in • Then compare Dphi/Dz to a predetermined value of strip widths. • Start by cutting on di-strips with pattern 1 or 2 which ranges over 3 di-strips corresponding to 6 strip widths. Then continue comparing Dphi/Dz to a smaller value of strip widths. z Φ1 Layer 1 Φ6 Layer 6 Top View of CSC (ME1 or ME2) muon
Does this approach make sense? • 2-D histogram of Dphi/Dz vs. Strip Pattern for half-strips. • Note: • in ME2/2 and ME3/2 (where most of LCTs are located), strips are 2.33mrad • Strip Patterns 3-6 cross 2 half-strips (2.33mrad) • Strip Patterns 1 & 2 cross 3 half-strips (~4 mrad) • Strip Pattern 7 is straight (stays on same half-strip) ? This approach does seem to make sense.
Next • Apply this method to make cuts on segment angle in order to look at affect on chamber efficiencies. • Stay tuned……