ALICEPMD SIMULATION

1
Status of PMD Software
Flow Diagram
GEANT
SDIGIT
DIGIT
EXPT
RECONSTRUCTION
RAW DATA
DISCRIMINATION
CLUSTERING
ESD
2
Status of PMD Software

• GEANT Geometry BM Almost complete, checking
  going on
• soon to be
  committed to CVS

• SDIGIT dimension to be modified

• DIGIT nothing to be changed

• RAW DATA New format to be implemented

• RECONSTRUCTION
• CLUSTERING old algorithm is in
  place
• DISCRIMINATION to be done

• EventSummaryData New format implemented and
  committed to CVS

• Occupancy to be done

3
Status of PMD Software

• ASSOCIATION Not yet in the CVS.

• CALIBRATION DATABASE ZA complete, committed
  to CVS

• ALIGNMENT DATABASE BM complete, committed to
  CVS

For details please visit http//www.veccal.ernet.i
n/pmd/ALICE/alice.html
4
Clustering AliPMDClustering Base class
AliPMDClusteringV1 Inherited, real
implementation of algorithm This change is
committed to CVS
Discrimination AliPMDDiscriminator Base
class AliPMDEmpDiscriminator Inherited,
implementation of algo (corr. PRE CPV)
AliPMDNNDiscriminator, AliPMDSVMDiscriminator ..
Etc. This change is committed to CVS
5
Association Need to store the hits
associated with a cluster Infrastructure is
already created and committed to CVS
Cluster information stored in one tree
Hits information stored in another tree
Fetching the (x,y) value to be implemented
6
Readout Scheme
Type B Total MCM/Module 72
Type A Total MCM/Module 72 Total MCM/DDL
432 for PREshower plane Total MCM/DDL
864 for CPV plane
Information encoded in a 32 bit word
11bits 6bits
12bits
7
New Thought
Address bits contain two informations In addition
to the MCM number, it contains Chain
number Depending on the Occupancy, the chain can
have 4 MCM or 24 MCM
Information encoded in a 32bit word
Signal
Channel address
MCM address
Chain address
P
0
0
6bit 5bit 6bit
12bit
8
ESD

• Following variables are being stored for Physics
  Analysis
• - Detector plane (PRE0, CPV1)
• - Cluster X
• - Cluster Y
• - Cluster Z (without vertex correction)
• - Cluster ADC
• - Number of cells in a cluster
• - Cluster PID

AliESDPmdTrack code in CVS