CLEOIII Trigger Systematic Studies Progress Report M Selen

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CLEO-III Trigger Systematic Studies Progress Report – M. Selen l l Axial Tracking èStudy

CLEO-III Trigger Systematic Studies Progress Report – M. Selen l l Axial Tracking èStudy more or less completed èWork done by Inga Karliner (build on work by Randal Hans) èBottom line: Efficiency for PT>200 Me. V ~ 99. 9% Stereo Tracking èA natural extension of the above èStudies done by Charles & Randal have shown this is also extremely efficient. We will quantify this soon. Calorimeter èWork proceeding in || with CLEO-c sharing (show some plots). èStudies done by Topher Cawlfield (build on work by Jesse Ernst) Timing èThis was “tuned” when the trigger was commissioned. èWill quantify after calorimeter turn-on study. www. hep. uiuc. edu/cleo/trig 3/ M. Selen, March/03 CLEO Meeting: Pg 1

Mixer/Shaper Boards Gates DR 3 - TQT G / CAL TILE(8) ASUM QVME TIM

Mixer/Shaper Boards Gates DR 3 - TQT G / CAL TILE(8) ASUM QVME TIM DM/CTL Axial tracker DFC TIM DM/CTL DAQ L 1 D TRCR AXPR CCGL CC Digital SURF DM/CTL STTR(12) TCTL TPRO(4) TIM Stereo tracker QVME Barrel CC Trigger System Overview ASUM AXTR(16) AXX(16) Endcap CC CLEO-III/c Analog TILE (16) CLEO Flow control & Gating Drift Chamber Crates Level 1 decision ctrl. Mixer/Shaper Crates (24) TIM DM/CTL TPRO(2) SURF TIM DM/CTL www. hep. uiuc. edu/cleo/trig 3/ M. Selen, March/03 CLEO Meeting: Pg 2

Layer 9 = “key” Inner Lookup Outer Lookup Inner/Outer track correlator www. hep. uiuc.

Layer 9 = “key” Inner Lookup Outer Lookup Inner/Outer track correlator www. hep. uiuc. edu/cleo/trig 3/ M. Selen, March/03 CLEO Meeting: Pg 3

Tracking Systematic Study l Approach: èLook at CLEO-III Data-5 through Data-16 èSelect events that

Tracking Systematic Study l Approach: èLook at CLEO-III Data-5 through Data-16 èSelect events that pass EL-track line » (#AX>0)&(#CBmd>0)&(AX+CB time) èSelect by L 3 classification “Hadron” “Electron” èLoop over “good” reconstructed tracks (c 2/dof<3. 5, d 0<1. 5 cm, etc…) » Ignore highest momentum track (assume it caused trigger) » Examine trigger status of all other tracks (did it “pass” or not) www. hep. uiuc. edu/cleo/trig 3/ M. Selen, March/03 CLEO Meeting: Pg 4

l To see if a track “passes” trigger: èExtrapolate fit back to layer 9

l To see if a track “passes” trigger: èExtrapolate fit back to layer 9 to see which of the 112 key wires should be asserted. èSee if the track-finding hardware for this wire, or either of its immediate neighbors, reports a correlated track. èA track is called “Isolated” if there are no other tracks within ± 5 key wires. èIf trigger does not fire, see if its because of: » Missing hits (OK) » Hardware (BAD) èStudy as a function of tracks PT and cos(q) www. hep. uiuc. edu/cleo/trig 3/ M. Selen, March/03 CLEO Meeting: Pg 5

“Isolated Tracks” In Electron Events All Tracks PT 1/PT 200 Me. V Total Efficiency

“Isolated Tracks” In Electron Events All Tracks PT 1/PT 200 Me. V Total Efficiency www. hep. uiuc. edu/cleo/trig 3/ 1/PT No Trigger - hardware 1/PT No Trigger -missing hits 1/PT M. Selen, March/03 CLEO Meeting: Pg 6

All Tracks “Isolated Tracks” In Hadron Events PT 1/PT 200 Me. V Total Efficiency

All Tracks “Isolated Tracks” In Hadron Events PT 1/PT 200 Me. V Total Efficiency www. hep. uiuc. edu/cleo/trig 3/ 1/PT No Trigger - hardware 1/PT No Trigger -missing hits 1/PT M. Selen, March/03 CLEO Meeting: Pg 7

All Tracks “Non-Isolated Tracks” In Hadron Events PT 1/PT 200 Me. V Total Efficiency

All Tracks “Non-Isolated Tracks” In Hadron Events PT 1/PT 200 Me. V Total Efficiency www. hep. uiuc. edu/cleo/trig 3/ 1/PT No Trigger - hardware 1/PT No Trigger -missing hits 1/PT M. Selen, March/03 CLEO Meeting: Pg 8

“Isolated Tracks” In Electron Events Cos(q) All Tracks cos(q) (PT > 200 Me. V)

“Isolated Tracks” In Electron Events Cos(q) All Tracks cos(q) (PT > 200 Me. V) Total Efficiency cos(q) www. hep. uiuc. edu/cleo/trig 3/ No Trigger - hardware cos(q) No Trigger -missing hits cos(q) M. Selen, March/03 CLEO Meeting: Pg 9

“Isolated Tracks” In Hadron Events Cos(q) No Trigger - hardware All Tracks cos(q) (PT

“Isolated Tracks” In Hadron Events Cos(q) No Trigger - hardware All Tracks cos(q) (PT > 200 Me. V) Total Efficiency cos(q) www. hep. uiuc. edu/cleo/trig 3/ cos(q) No Trigger -missing hits cos(q) M. Selen, March/03 CLEO Meeting: Pg 10

“Non-Isolated Tracks” In Hadron Events Cos(q) No Trigger - hardware All Tracks cos(q) (PT

“Non-Isolated Tracks” In Hadron Events Cos(q) No Trigger - hardware All Tracks cos(q) (PT > 200 Me. V) Total Efficiency cos(q) www. hep. uiuc. edu/cleo/trig 3/ cos(q) No Trigger -missing hits cos(q) M. Selen, March/03 CLEO Meeting: Pg 11

Axial Tracking Summary: l For PT > 200 Me. V we lose the following

Axial Tracking Summary: l For PT > 200 Me. V we lose the following due to missing hits: è 1 of 41, 500 isolated electron tracks è 13 of 10, 500 isolated hadron tracks è 1 of 4, 100 non-isolated hadron tracks Overall efficiency > 99. 9% l We don’t lose any tracks due to “missing hardware”. l www. hep. uiuc. edu/cleo/trig 3/ M. Selen, March/03 CLEO Meeting: Pg 12

Stereo Tracking Axial Raw key wires 112 Clustered key wires 112 Axial matching cells

Stereo Tracking Axial Raw key wires 112 Clustered key wires 112 Axial matching cells 48 Stereo - U 48 high 48 low Stereo - V 48 high 48 low high www. hep. uiuc. edu/cleo/trig 3/ low high M. Selen, March/03 CLEO Meeting: Pg 13

Topher’s study of CC “turnon” behavior 1. 0. 8 Need to study . 6.

Topher’s study of CC “turnon” behavior 1. 0. 8 Need to study . 6. 4. 2 www. hep. uiuc. edu/cleo/trig 3/ M. Selen, March/03 CLEO Meeting: Pg 14

Timing Issues Time Bucket 5 10 15 CC time – TR time LOW 20

Timing Issues Time Bucket 5 10 15 CC time – TR time LOW 20 10 Key Wire 20 30 MED 40 50 60 70 80 90 HIGH 100 110 #track Ev-time www. hep. uiuc. edu/cleo/trig 3/ M. Selen, March/03 CLEO Meeting: Pg 15

Summary & Plan l l Axial Tracking Trigger studies more or less finished èEfficiency

Summary & Plan l l Axial Tracking Trigger studies more or less finished èEfficiency >= 99. 9% for PT > 200 Me. V Stereo Tracking study is next èExpect similar results Calorimeter studies also under way èUnderstand turn-on behavior for each TIXEL » Threshold, Width, Max-efficiency » Also needed for MC èMust include sharing. This is non-trivial. Timing is an issue that still needs to be addressed èTR relative to CC èOverall efficiency www. hep. uiuc. edu/cleo/trig 3/ M. Selen, March/03 CLEO Meeting: Pg 16

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