Kin Yip MSU, Oct. 1998 Efficiency-p t turn-on curve, offset & p t MC Simulation using UPG_GEANT with muons Study for the p t trigger thresholds in L1 (CFTTM)

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Presentation transcript:

Kin Yip MSU, Oct Efficiency-p t turn-on curve, offset & p t MC Simulation using UPG_GEANT with muons Study for the p t trigger thresholds in L1 (CFTTM) using two different algorithms Only the factor of track equations (roads) is considered here 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.; Equations sorted according to p t ; Taking away equations with lower p t by inspection  inefficiencies at lower p t  sharper turn-on.

Kin Yip MSU, Oct Track binning By offset ( in terms of fibers )

Kin Yip MSU, Oct P T binning yields sharper turn-on than offset binning

Kin Yip MSU, Oct L1 CFT binning complications >16000 CFT track equations for each Front-End Board ( 4.5° sector ) in probably 16 tracking PLD’s ; 1/p t No. of equations within a range of p t  1/p t  a lower p t bin/threshold has many more equations ! Assuming 4 p t bins, it’d be nice if each group of PLD can accommodate one p t bin/threshold ; but  half of the equations needed for PLD’s in the lowest p t bin,  Too many ! Leave no flexibility for future change.

Kin Yip MSU, Oct. 1998

Kin Yip MSU, Oct st Pt bin 2 nd Pt bin 3 rd Pt bin 4 th Pt bin

Kin Yip MSU, Oct Undecided ? I pick p t thresholds for the L1 trigger counts ( not directly related to L2 etc. ) as (1) GeV (2) GeV (3) GeV (4) > 10 GeV