cleo-iii trigger systematic studies progress report – m. selen
DESCRIPTION
CLEO-III Trigger Systematic Studies Progress Report – M. Selen. Axial Tracking Study more or less completed Work done by Inga Karliner (build on work by Randal Hans) Bottom line: Efficiency for PT>200 MeV ~ 99.9% Stereo Tracking A natural extension of the above - PowerPoint PPT PresentationTRANSCRIPT
M. Selen, March/03 CLEO Meeting: Pg 1www.hep.uiuc.edu/cleo/trig3/
CLEO-III TriggerCLEO-III Trigger Systematic StudiesSystematic Studies Progress Report – M. Selen
Axial Tracking Study more or less completed Work done by Inga Karliner (build on work by Randal Hans) Bottom line: Efficiency for PT>200 MeV ~ 99.9%
Stereo Tracking A natural extension of the above Studies done by Charles & Randal have shown this is also
extremely efficient. We will quantify this soon.
Calorimeter Work proceeding in || with CLEO-c sharing (show some plots). Studies done by Topher Cawlfield (build on work by Jesse
Ernst)
Timing This was “tuned” when the trigger was commissioned. Will quantify after calorimeter turn-on study.
M. Selen, March/03 CLEO Meeting: Pg 2www.hep.uiuc.edu/cleo/trig3/
TRCR
Mixer/ShaperBoards
TILE(8)
ASUM
QVME
TILE (16)
ASUM
AXTR(16) AXX(16)
DR3 - TQT
STTR(12)
TRCR
L1D
G / CAL
DFC
CLEO
An
alo
g
Gates
ctrl
.
Mixer/Shaper Crates (24)
QVME
TPRO(2)
TCTL
TIM
DM/CTL
TIM
DM/CTL
TIM
DM/CTL
TPRO(4) TIM
DM/CTL
TIM
DM/CTL
AXPR
CCGL
SURF
SURF
Drift Chamber Crates
Axi
al t
rack
erS
tere
o t
rack
er
Bar
rel C
CE
nd
cap
CC
CC
Dig
ital
Lev
el 1
dec
isio
nF
low
co
ntr
ol &
Gat
ing
DAQ
CLEO-III/cTriggerSystem
Overview
M. Selen, March/03 CLEO Meeting: Pg 3www.hep.uiuc.edu/cleo/trig3/
Layer 9 = “key”
InnerLookup
OuterLookup
Inner/Outer track correlator
M. Selen, March/03 CLEO Meeting: Pg 4www.hep.uiuc.edu/cleo/trig3/
Tracking Systematic StudyTracking Systematic Study
Approach: Look at CLEO-III Data-5 through Data-16 Select events that pass EL-track line
» (#AX>0)&(#CBmd>0)&(AX+CB time) Select by L3 classification
Loop over “good” reconstructed tracks (2/dof<3.5, d0<1.5cm, etc…)» Ignore highest momentum track (assume it caused trigger)» Examine trigger status of all other tracks (did it “pass” or
not)
“Hadron” “Electron”
M. Selen, March/03 CLEO Meeting: Pg 5www.hep.uiuc.edu/cleo/trig3/
To see if a track “passes” trigger:Extrapolate fit back to layer 9 to see which of the 112 key wires should be
asserted.
See if the track-finding hardware for this wire, or either of its immediate neighbors, reports a correlated track.
A track is called “Isolated” if there are no other tracks within ±5 key wires.
If trigger does not fire,see if its because of: » Missing hits (OK)» Hardware (BAD)
Study as a function oftracks PT and cos()
M. Selen, March/03 CLEO Meeting: Pg 6www.hep.uiuc.edu/cleo/trig3/
1/PT 1/PT
1/PT 1/PT
“IsolatedTracks”
InElectronEvents
All TracksNo Trigger
- hardware
No Trigger
-missing hits
PT
Total Efficiency
200 MeV
M. Selen, March/03 CLEO Meeting: Pg 7www.hep.uiuc.edu/cleo/trig3/
1/PT 1/PT
1/PT 1/PT
“IsolatedTracks”
InHadronEvents
All TracksNo Trigger
- hardware
No Trigger
-missing hits
PT
Total Efficiency
200 MeV
M. Selen, March/03 CLEO Meeting: Pg 8www.hep.uiuc.edu/cleo/trig3/
1/PT 1/PT
1/PT 1/PT
“Non-IsolatedTracks”
InHadronEvents
All TracksNo Trigger
- hardware
No Trigger
-missing hits
PT
Total Efficiency
200 MeV
M. Selen, March/03 CLEO Meeting: Pg 9www.hep.uiuc.edu/cleo/trig3/
cos()
“IsolatedTracks”
InElectronEvents
All TracksNo Trigger
- hardware
No Trigger
-missing hitsTotal Efficiency
cos()
cos()
cos()
Cos()(PT > 200 MeV)
M. Selen, March/03 CLEO Meeting: Pg 10www.hep.uiuc.edu/cleo/trig3/
cos()
“IsolatedTracks”
InHadronEvents
All Tracks
No Trigger
- hardware
No Trigger
-missing hitsTotal Efficiency
cos()
cos()
cos()
Cos()(PT > 200 MeV)
M. Selen, March/03 CLEO Meeting: Pg 11www.hep.uiuc.edu/cleo/trig3/
cos()
“Non-IsolatedTracks”
InHadronEvents
All Tracks
No Trigger
- hardware
No Trigger
-missing hitsTotal Efficiency
cos()
cos()
cos()
Cos()(PT > 200 MeV)
M. Selen, March/03 CLEO Meeting: Pg 12www.hep.uiuc.edu/cleo/trig3/
Axial Tracking Summary:Axial Tracking Summary:
For PT > 200 MeV we lose the following due to missing hits:1 of 41,500 isolated electron tracks13 of 10,500 isolated hadron tracks1 of 4,100 non-isolated hadron tracks
Overall efficiency > 99.9%
We don’t lose any tracks due to “missing hardware”.
M. Selen, March/03 CLEO Meeting: Pg 13www.hep.uiuc.edu/cleo/trig3/
Axial112
112
48
Raw key wires
Clustered key wires
Axial matching cells
48 high
48 low
Stereo - U
48 high
48 low
Stereo - V
Stereo Tracking
high highlow
M. Selen, March/03 CLEO Meeting: Pg 14www.hep.uiuc.edu/cleo/trig3/
Topher’s study of CC “turnon” behavior
.8
.6
.4
.2
1.0
Needtostudy
M. Selen, March/03 CLEO Meeting: Pg 15www.hep.uiuc.edu/cleo/trig3/
10
Key
Wir
e
Time Bucket
20
30
40
50
60
70
80
90
100
110
5 10 15 20
#trackEv-time
Timing IssuesLOW
MED
HIGH
CC time – TR time
M. Selen, March/03 CLEO Meeting: Pg 16www.hep.uiuc.edu/cleo/trig3/
Summary & PlanSummary & Plan
Axial Tracking Trigger studies more or less finishedEfficiency >= 99.9% for PT > 200 MeV
Stereo Tracking study is nextExpect similar results
Calorimeter studies also under wayUnderstand turn-on behavior for each TIXEL
» Threshold, Width, Max-efficiency» Also needed for MC
Must include sharing. This is non-trivial. Timing is an issue that still needs to be addressed
TR relative to CCOverall efficiency