full simulator study of muon detector and calorimeter
DESCRIPTION
Full simulator study of muon detector and calorimeter. 8th ACFA Workshop at Daegu, Korea 2005/07/12 (Tue) Hiroaki Ono (Niigata University) with ACFA-sim-j members. Outline. Muon detector status in full simulator Geometry of muon detector Magnetic field in return yoke - PowerPoint PPT PresentationTRANSCRIPT
2005/07/12 (Tue) 8th ACFA meeting @Daegu
Full simulator study of muon detector and calorimeter
8th ACFA Workshop at Daegu, Korea2005/07/12 (Tue)
Hiroaki Ono (Niigata University)with ACFA-sim-j members
2005/07/12 (Tue) 8th ACFA meeting @Daegu
Outline
1. Muon detector status in full simulator2. Geometry of muon detector3. Magnetic field in return yoke4. MUD response with CAL information
1. Muon signal observation2. Muon passing through the CAL3. Pion leakage/punch through check4. Muon generated from Jet/CAL inside
5. Summary and next steps
2005/07/12 (Tue) 8th ACFA meeting @Daegu
1. Muon detector status in Full simulator
• Jupiter (Geant4 based MC generator)– Installation of muon geometry, magnetic field to the generator was finished(Outside of the Solenoid, as a return yoke)
• Satellites/jsf (ROOT base Analysis part)– Smearing and muon ID parts are under constructio
n.– Exact(MC truth) hit can be analyzed.
I will report on the current status of Muon detector(MUD) related to the Calorimeter in full simulator.
2005/07/12 (Tue) 8th ACFA meeting @Daegu
2. Geometry of Muon detector
• Active layer (10cm-thick, not segmented)– Air : Default, Gas chamber reserved– Scintillator : test version
• Absorber (40cm-thick)– Iron (as a return yoke)
• Barrel : 4 layers• Endcap : 5+2(inner) layers• Alternately placed barrel and endcap layer• Octagonal shape in the phi direction
Z direction
X-Y direction
2005/07/12 (Tue) 8th ACFA meeting @Daegu
3. Magnetic field in the Return yoke
Magnetic field/ Flux lineUnit: Tesla
We followed this results to the full simulator magnetic field
Return Yoke magnetic field studied by KEK H.Yamaoka-san
2005/07/12 (Tue) 8th ACFA meeting @Daegu
Magnetic field in full simulator
Magnetic field direction and magnituderoughly followed Yamaoka-san’s results
2005/07/12 (Tue) 8th ACFA meeting @Daegu
Magnetic field test by muon
- 10 GeV single beamInjected to the Barrel direction
Opposite curvature at the inside of solenoid and outside.
2005/07/12 (Tue) 8th ACFA meeting @Daegu
4. MUD response with CAL information
1. Observed muon signal by muon detector2. Muons passing through the CAL3. Pion leakage from CAL (punch through)
e+e-→Z→qq (2 jets) event check
Single beam () test
4. Number of muons produced in Jets or created inside of the CALUnfortunately, solenoid is set to air at Jupiter default.I checked the interaction length as only 7.10 (CAL)
Ignored the solenoid material in this study
2005/07/12 (Tue) 8th ACFA meeting @Daegu
4.1 Observed muon signal by MUD layer
Threshold will be set to 15 MeV as a MIP signalfor the muon finding (mu ID)
Injection :10GeV -
barrel direction
But muon finding/mu ID part is under construction
Energy deposit checked in MUD front layer
2005/07/12 (Tue) 8th ACFA meeting @Daegu
5GeV
2GeV
4.2 Muons passing through the CAL
• Less than 5 GeV Rapidly decrease the number of muons come out from CAL• Less than 1.5 GeV No muons can leak out CAL
Low energy muons can not come out from the calorimeter due to the Energy loss at the CAL and Magnetic field.
- single beamenergy scan1 ~ 300 GeV500 events
barrel direction
In this study, I ignored the solenoidmaterial
2005/07/12 (Tue) 8th ACFA meeting @Daegu
4.3 Pions leak or punch through from the CAL
20 GeV : 11 pions( ) 100 GeV : 156 pions(±)
Punch through
Punch through
High energy (almost same as incident energy) punch through pions observed. (Still low statistics)
single beam energy scan 2 ~ 300GeV500 pions barrel direction
Vertical : Number of pions tagged at CAL outside Horizontal : Pion energy observed at CAL outside
GeV GeV
2005/07/12 (Tue) 8th ACFA meeting @Daegu
20GeV
Number of pions come out from the CAL
20GeV
Sum of the pions energy normalized by number of incident pions
Number of pions and Energy leakage from CAL
Leakage energy delivered by pions is about 2% of the incident pion energy.Number of pions passing through or leaked out from CAL increased from the pions incident energy up to 20 GeV
Incident particle : 500 pions Incident particle : 500 pions
2005/07/12 (Tue) 8th ACFA meeting @Daegu
4.4 Muons generated from jet/CALe+e-→Z→qq
ECM = 300 GeV, Events = 500 events
Calorimeter
Muon detector created inside of the CAL
from jet
2005/07/12 (Tue) 8th ACFA meeting @Daegu
Muons checked at CAL outsidee+e-→Z→qq (2 jets) (Ecm : 300GeV, 500events)
226 muons observed at CAL outMean Energy : 18.5 GeV(Max ~ 140 GeV)
22 muons observedEnergy : Less than 10 GeVBackground of jet origin muon
comes from jet(tagged at CAL front and out)
generated inside of the CAL (tagged only at CAL backside)
2005/07/12 (Tue) 8th ACFA meeting @Daegu
5. Summary and Next steps
•We finished the installation of MUD geometry, Magnetic field to the Jupiter. •We checked the MUD response and CAL leakage by single muon, pion beam and jet events.
•Change solenoid material to real case and recheck.•BUG fix should be improved in full simulator.•MUD should be changed to the tracker base.•Evaluate Muon finding efficiency.
Next steps...
Current status...
2005/07/12 (Tue) 8th ACFA meeting @Daegu
Appendix
2005/07/12 (Tue) 8th ACFA meeting @Daegu
Full simulator geometryCalorimeter : EM : 4mm lead + 1mm scintillator : HD : 8mm lead + 2mm scintillator EM 27X0 + HD 6.1l0 (7.1l0 )
Muon : 200cm (Iron : 11.8l0)Pb : dE/dX = 217.9 MeV/l0
Solenoid : 85cm(with 10cm core)
2005/07/12 (Tue) 8th ACFA meeting @Daegu
Muon checked at CAL front (E>1.5GeV)e+e-→Z →qqbar (Ecm : 300GeV, 500events)
generated inside of the CAL692 muons observedEnergy : Cut > 1.5GeV
GeV
Number of muons measured at the CAL front
2005/07/12 (Tue) 8th ACFA meeting @Daegu
Muon finding methods (Under construction)m Search MIP peak in the MUD
(threshold > 10MeV)
All layer passing event required
Check mother track CAL(Front/Out)
MUD
CAL Track matching with tracker
Tracker Under construction !