FMD simulation status
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FMD simulation status Alexei Kurepin, Alla Maevskaia INR RAS, Moscow 17 September 2002
description
FMD simulation status. Alexei Kurepin, Alla Maevskaia INR RAS, Moscow. 17 September 2002. Simulation output. Signal/background coefficient for each 0.1 h interval. Number of disk & number of sector & number of ring & energy deposited in this pad. - PowerPoint PPT Presentation
Transcript of FMD simulation status
FMD simulation
statusAlexei Kurepin, Alla Maevskaia
INR RAS, Moscow
17 September 2002
Simulation output
Number of disk & number of sector &number of ring &energy deposited
in this pad
Signal/background coefficient for each
0.1 interval
17 September 2002 Alla Maevskaia INR RAS, Moscow
Occupancies of charged particles per strip for one
HIJINGpara (8000 particles per unit of pseudorapidity) event
vs number of ring
17 September 2002 Alla Maevskaia INR RAS, Moscow
Deposited energy spectra from one strip for one HIJINGpara
event
17 September 2002 Alla Maevskaia INR RAS, Moscow
Primary / total coefficient comparison for magnetic field 0.2T and 0.4 T
17 September 2002 Alla Maevskaia INR RAS, Moscow
Digitization: from GEANT Hits to DAQ tape
For each pad read Hits
If deposited energy > threshold
Convert energy losses to ADC signal
Add noise
Simulated DAQ tape
17 September 2002 Alla Maevskaia INR RAS, Moscow
Reconstruction: from DAQ tape to number of particles
Read DigitsSubtract pedestals
Calculate number of empty pads for each 0.1
If number of empty pad
number of pads>0.1
Use Poisson method Use threshold method
Multiply reconstructed number of particles by signal/background coefficient
Number of charged particles in 0.1
Comparison number of particles in one pad from HIJING and from
Poisson distribution
17 September 2002 Alla Maevskaia INR RAS, Moscow
Reconstruction accuracy for 40 event HIJINGpara, B=0.2T
17 September 2002 Alla Maevskaia INR RAS, Moscow
Reconstruction accuracy for 40 event HIJINGpara, B=0.2T
17 September 2002 Alla Maevskaia INR RAS, Moscow
Occupancy per pad for 100 HIJING events b=0-8.6fm,
B=0.4T
17 September 2002 Alla Maevskaia INR RAS, Moscow
Reconstruction accuracy for 100 HIJING events B=0.4T:
(Nreal - Nreconstructed)/Nreal
17 September 2002 Alla Maevskaia INR RAS, Moscow
Occupancy per pad for 2500 PYTHIA events
17 September 2002 Alla Maevskaia INR RAS, Moscow
Reconstructed accuracy for 2500 PYTHIA events
without signal/background corrections.
17 September 2002 Alla Maevskaia INR RAS, Moscow
Primary / total coefficient for 2500 pp PYTHIA event
17 September 2002 Alla Maevskaia INR RAS, Moscow
Primary / total coefficient for all units of pseudorapidity for 2500 pp
collisoins
17 September 2002 Alla Maevskaia INR RAS, Moscow
Summary
Now we are close to reality after HIJING simulation with different impact parameters
Poisson and threshold methods of reconstruction are consistent
Reconstruction of multiplicity for PP collisions was made
17 September 2002 Alla Maevskaia INR RAS, Moscow
