sPHENIX discussion of software

[pinkenburg <pinkenburg AT bnl.gov>]

Hi folks,

The Geant4 processing has been ongoing and we have close to 500,000 
events from the initial geant4 processing. The reconstruction chain 
needs some work but is basically functional up to jets. I split it into 
six separate steps 
(https://github.com/sPHENIX-Collaboration/MDC1/tree/main/submit):

pass1:
Geant4 simulation of sHijing, output (G4Hits of all active detectors) is 
written to
/sphenix/data/data02/sphnxpro/MDC1/sHijing_HepMC/G4Hits/data
Each file contains 100 events

pass2:
50kHz pileup generation, output is split into 4 files
DST_BBC_G4HIT_sHijing_0_12fm contains bbc and epd G4Hits
DST_CALO_G4HIT_sHijing_0_12fm contains all calorimeter G4Hits
DST_TRKR_G4HIT_sHijing_0_12fm contains tracking detector G4Hits
DST_TRUTH_G4HIT_sHijing_0_12fm contains the truth info (and HepMC 
records and black hole hits)
the output is written to:
/sphenix/data/data02/sphnxpro/MDC1/sHijing_HepMC/PileUp/data
Each file contains about 50 events.


pass3calo
processing of calorimeter data from the DST_CALO_GHITS files, towers 
(all flavors) and clusters are saved. I tried the topo clusters but it 
ran out of memory (I killed it as it reached 40GB).
the output is written to
/sphenix/data/data02/sphnxpro/MDC1/sHijing_HepMC/CaloCluster/data

 pass3trk:
tracking pre-pass: tpc electron drift and clustering, silicon g4hit 
clustering and silicon seeds from truth info using DST_TRKR_G4HIT and 
DST_TRKR_G4HIT files. Saves clusters for the tracking
the output is written to
/sphenix/data/data02/sphnxpro/MDC1/sHijing_HepMC/TrkrCluster/data

pass4trk:
tracking and vertex reconstruction with ACTS (also rave vertex)
the output goes to
/sphenix/data/data02/sphnxpro/MDC1/sHijing_HepMC/Tracks/data

pass5jet:
jet reconstruction based on tracks (clusters need a vertex)
the output goes to
/sphenix/data/data02/sphnxpro/MDC1/sHijing_HepMC/Jets/data


all files contain the data needed for the synchronization so one can mix 
and match whatever is needed. There is a decent amount of calorimeter 
files, tracking (and jets) are single files used to establish that this 
works. But they can certainly be used to check if they work as input for 
analysis.

Chris


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Christopher H. Pinkenburg       ;    pinkenburg AT bnl.gov
                                ;    http://www.phenix.bnl.gov/~pinkenbu

Brookhaven National Laboratory  ;    phone: (631) 344-5692
Physics Department Bldg 510 C   ;    fax:   (631) 344-3253
Upton, NY 11973-5000

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