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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
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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 8th ACFA meeting @Daegu
Outline • Muon detector status in full simulator • Geometry of muon detector • Magnetic field in return yoke • MUD response with CAL information • Muon signal observation • Muon passing through the CAL • Pion leakage/punch through check • Muon generated from Jet/CAL inside • Summary and next steps 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 construction. • 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. 8th ACFA meeting @Daegu
2. Geometry of Muon detector X-Y direction • 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 8th ACFA meeting @Daegu Z direction
3. Magnetic field in the Return yoke Return Yoke magnetic field studied by KEK H.Yamaoka-san Unit: Tesla Magnetic field/ Flux line We followed this results to the full simulator magnetic field 8th ACFA meeting @Daegu
Magnetic field in full simulator Magnetic field direction and magnitude roughly followed Yamaoka-san’s results 8th ACFA meeting @Daegu
Magnetic field test by muon m- 10 GeV single beam Injected to the Barrel direction Opposite curvature at the inside of solenoid and outside. 8th ACFA meeting @Daegu
4. MUD response with CAL information Single beam (p, m) test • Observed muon signal by muon detector • Muons passing through the CAL • Pion leakage from CAL (punch through) e+e-→Z→qq (2 jets) event check • Number of muons produced in Jets • or created inside of the CAL Unfortunately, solenoid is set to air atJupiter default. I checked the interaction length as only 7.1l0 (CAL) Ignored the solenoid material in this study 8th ACFA meeting @Daegu
4.1 Observed muon signal by MUD layer Energy deposit checked in MUD front layer Injection :10GeVm- barrel direction m Threshold will be set to 15 MeV as a MIP signal for the muon finding (mu ID) But muon finding/mu ID part is under construction 8th ACFA meeting @Daegu
5GeV 2GeV 4.2 Muons passing through the CAL Low energy muons can not come out from the calorimeter due to the Energy loss at the CAL and Magnetic field. • -single beam energy scan 1~300 GeV 500 events barrel direction m In this study, I ignored the solenoid material • 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 8th ACFA meeting @Daegu
4.3 Pions leak or punch through from the CAL p-single beam energy scan 2~300GeV500 pions barrel direction Vertical : Number of pions tagged at CAL outside Horizontal : Pion energy observed at CAL outside p p 20 GeV : 11pions(p± ) 100 GeV : 156pions(p±) Punch through Punch through GeV GeV High energy (almost same as incident energy) punch through pions observed. (Still low statistics) 8th ACFA meeting @Daegu
Number of pions and Energy leakage from CAL Sum of the pions energy normalized by number of incident pions Number of pions come out from the CAL Incident particle : 500 pions Incident particle : 500 pions 20GeV 20GeV • 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 8th ACFA meeting @Daegu
e+e-→Z→qqECM = 300 GeV, Events = 500 events 4.4 Muons generated from jet/CAL mfrom jet mcreated inside of the CAL Muon detector m m Calorimeter p m 8th ACFA meeting @Daegu
Muons checked at CAL outside e+e-→Z→qq (2 jets) (Ecm : 300GeV, 500events) • comes from jet (tagged at CAL front and out) • generated inside of the CAL (tagged only at CAL backside) 226 muons observed at CAL out Mean Energy : 18.5 GeV (Max ~ 140 GeV) 22 muons observed Energy : Less than 10 GeV Background of jet origin muon 8th ACFA meeting @Daegu
5. Summary and Next steps Current status... • 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. Next steps... • 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. 8th ACFA meeting @Daegu
Appendix 8th ACFA meeting @Daegu
Full simulator geometry Calorimeter : EM : 4mm lead + 1mm scintillator : HD : 8mm lead + 2mm scintillator EM 27X0 + HD 6.1l0 (7.1l0 ) Solenoid : 85cm(with 10cm core) Pb : dE/dX =217.9MeV/l0 Muon : 200cm (Iron :11.8l0) 8th ACFA meeting @Daegu
Muon checked at CAL front (E>1.5GeV) e+e-→Z →qqbar (Ecm : 300GeV, 500events) Number of muons measured at the CAL front • generated inside of the CAL 692 muons observed Energy : Cut > 1.5GeV GeV 8th ACFA meeting @Daegu
Muon finding methods (Under construction) m Search MIP peak in the MUD (threshold > 10MeV) All layer passing event required MUD Check mother track CAL(Front/Out) Track matching with tracker CAL Under construction ! Tracker 8th ACFA meeting @Daegu