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 !