1. The Simulation Status of SDHCAL
Ran.Han
IPNL

2. Outline Motivation Standalone Geant4 Simulation
Realistic geometry of prototype
Realistic properties of GRPC
ILD Global Simulation Mokka
Videau and Tesla Model
The implantation of digitizer
Summary 2

3. Motivation
Hardware:
Need to be able to resolve energy deposits from different particles
Highly granular detectors(as studied in )CALICE
Software:
Need to be able to identify energy deposits from each individual part
Sophisticated reconstruction software 3
Particle Flow Algorithm = HARDWARE+SOFTWARE

4. Green: finish Red: in progress Yellow: future Purple : Summary
Overview of SDHCal Software
Green: finish Red: in progress Yellow: future Purple : Summary
Standalone G4
Mokka
Marlin
Analysis
Realistic geometry of
prototype
Update VIDEAU
The digitizer to Marlin
Videau in Pandora
Cosmic Q feed
, Pad Multiplicity &&
Efficiency Comparison (TB)
Implant GRPC to TESLA for Barrel part
3 thresholds and energy calibration constants
MST, Fractal analysis
Charge Distribution
with heavy ionizing
particles
Endcap and Endcap ring in TESLA &&VIDEAU
Verify by Standalone and ILD software
In/off-time neutrons, Hough transform
Transfer prototype to Mokka
Digitizer to Mokka (to be discussed )
Neural Network for energy calibration
Realistic simulation of
GRPC Properties/Stru
GRPC in both Mechanical models
The xml file for analysis is ready
About to distribute the algorithms

5. Standalone GEANT4
properties description of SDHCAL in simulation :Lightweight; Flexible
Easy comparison with prototype, number of layer, with/WO absorber
Beam
DIF
gas
H.V
40 units:
2 cm absorber+0.6cm sensitive medium
1 cm2 readoutpad 5

6. GEANT4 Simulation
Realistic Geometry Simulation : GRPC, electronics , TB profile
Test
Beam 6
DIF: 1-3
ASIC: 1-48
PAD:1-64
Next: How to get induced charge?
Cosmic measurement

7. Charge in each pad ----The charge density distribution
Total Q Distribution
1: Simulate RPC physics process (first principle)
2: Get from data , extract parameters in Polya function from Data (F.Sulia, Gas Detectors,2009)
Charge(pC)
Polya-distribution:
Cosmic Charge
Polya Fit
7400V Polya Fitting
average accumulated charge
Next : pad multiplicity– number of hit pads for one track going through
Charge in each pad ----The charge density distribution 7

8. KIRK T. MCDONALD’s lecture
1D and 2D Q Density Distribution
KIRK T. MCDONALD’s lecture
-0.25cm
1.0cm d
Dispatching induced charge on more than one pad for tracks on the pad border.
Parameter a tuned to data 8
a=0.12cm  d~0.25cm

9. Comparison With TB Efficiency and Pad Multiplicity gas gap a=0.24cm
Standalone GEANT4 prototype simulation 9

10. for the future linear collider.
Mokka (Global Simulation for ILC)
Mokka is a full simulation using Geant4 and a realistic description of a detector
for the future linear collider. 10
Tesla
SHcalRPC02:
Keep AHCal information added SDHCal
BOTH RPC AND SCINTILLATOR
Videau
SHcalRPC01
ONLY RPC

11. Single muon Check: Geometry Correct

12. Geantino Check: GRPC Inside
e e e e+03 BarrelHcalModule Transportation
e e e+03 physiRPCFree Transportation
e e e+03 physiRPCmylarCathode Transportation
e e e+03 physiRPCGraphiteCathode Transportation
e e e+03 physiRPCThickGlass Transportation
e e e+03 physiRPCGap Transportation
e e e+03 physiRPCThinGlass Transportation
e e e+03 physiRPCGraphiteAnode Transportation
e e e+03 physiRPCmylar Transportation
e e e+03 physiRPCPCB Transportation
e e e+03 physiRPCElectronics Transportation
e e e+03 BarrelHcalModule Transportation

13. Shoot only Crack part in Barrel
Performance Comparison with Two
Different Geometry
Shoot only Crack part in Barrel
Shoot global in Barrel
1000 K0_Long Events
1000 K0_Long Events
Shoot global in Barrel
Same: GRPC, Digitization, Marlin Process, Pandora Setting

14. How to use all these models
Is available in ILD Software V01-11
The file in init.macro like
/Mokka/init/detectorModel ILD_01pre00
/Mokka/init/EditGeometry/rmSubDetector SHcalSc03
/Mokka/init/EditGeometry/addSubDetector SHcalRpc (TESLA)
#/Mokka/init/EditGeometry/addSubDetector SHcalRpc (VIDEAU)
#/Mokka/init/globalModelParameter Hcal_sensitive_model scintillator
/Mokka/init/globalModelParameter Hcal_sensitive_model SDRPC
/Mokka/init/globalModelParameter Hcal_cells_size 10
/Mokka/init/initialMacroFile mac.mac
/Mokka/init/lcioFilename pion.slcio
/Mokka/init/MokkaGearFileName pion.xml

15. Status of Digitizer in Marlin
Setup GRPC digitization start from Polya function : SimpleGRPCDigitization
Sum charges of Multiply particles in one cell
For pad multiplicity : the location of the track in one cell not know
1)Using the SimCalorimeterHit to know the number of particles in one cell, and randomly draw the location in the cell
2) Simulating 1mm2 cells and transform them into a 1cm2 cell in the Marlin processor (See Manqi’s talk yesterday)
3) Using LCIO v2 to keep this information in Mokka output

16. Thank you for your attention!
Summary
Standalone Geant4 Simulation
1- Realistic GEANT4 Simulation of Prototype
2- Efficiency, PadMulti Comparison with data-> Realistic simulation of GRPC Properties
Mokka Simulation
1- Realistic two HCAL structure in Mokka for GRPC
2- Compared the difference of cracks part between two structure
Thank you for your attention! 16

17. Back up

18. Cosmic Measured Q Distribution
1: Simulate RPC physics process (first principle)
2: Get from data , extract parameters in Polya function from Data (F.Sulia, Gas Detectors,2009)
32cm*8cm
GRPC 0.12cm
preamp
gate
QDC
Scintillator
Charge Spectrum Cosmic Test Set Up
64 Channels, trigger area < Channel area
Analog readout 18

19. Q Density Distribution Formula
a; the gas gap,
q; the total charge getting from polya function we take it as point charge
d ; the location of q.
The potential in gap can be expressed
from lecture:
a=2d 19

20. Cosmic measured Q distribution
Software Strategy
Standalone
GEANT4
Simulation
Test Beam Data
GRPC
Digitization
ILC Global
MOKKA
in Videau && Tesla
ILD Analysis
Marlin &&Pandora
Cosmic measured Q distribution

21. K0_Long: Videau vs Tesla
Only shoot to Crack Part
60GeV K0_Long
Blue: Tesla Crack
RMS90=4.69 Mean=55.2
Red: Tesla Crack
RMS90=9.25 Mean=48.05
20GeV K0_Long
Blue: Tesla Crack
RMS90=3.11 Mean=16.4
Red: Tesla Crack
RMS90=2.49 Mean=18.4