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Offset Equations sorted according to offsets ; Larger offsets smaller p t ; Taking away equations with larger offsets at each time inefficiencies at lower p t ; not very sharp turn-on. P t Find the average p t for each equation from its max./min.;
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Offset Equations sorted according to offsets ; Larger offsets smaller pt ; Taking away equations with larger offsets at each time inefficiencies at lower pt ; not very sharp turn-on. Pt Find the average pt for each equation from its max./min.; Equations sorted according to pt; Taking away equations with lower pt by inspection inefficiencies at lower pt sharper turn-on. Efficiency-pt turn-on curve, offset & pt • MC Simulation using UPG_GEANT with muons • Study for the pttrigger thresholds in L1 (CFTTM) using two different algorithms • Only the factor of track equations (roads) is considered here MSU, Oct. 1998
Track binning • By offset ( in terms of fibers ) MSU, Oct. 1998
PT binning yields sharper turn-on than offset binning MSU, Oct. 1998
L1 CFT binning complications • >16000 CFT track equations for each Front-End Board ( 4.5° sector ) in probably 16 tracking PLD’s ; • No. of equations within a range of ptµ1/pt • a lower pt bin/threshold has many more equations ! • Assuming 4 pt bins, it’d be nice if each group of PLD can accommodate one pt bin/threshold ; but • ~half of the equations needed for PLD’s in the lowest pt bin, • Too many ! • Leave no flexibility for future change. MSU, Oct. 1998
1st Pt bin 2nd Pt bin 3rd Pt bin 4th Pt bin MSU, Oct. 1998
Undecided ? I pick pt thresholds for the L1 trigger counts ( not directly related to L2 etc. ) as (1) 1.5 - 3 GeV (2) 3 - 5 GeV (3) 5 - 10 GeV (4) > 10 GeV MSU, Oct. 1998