Cosmic Simulation in rel 14: Samples


  • These samples are produced in 14.4.0 AtlasProduction on the batch system, although simulation step is also available with Simulation/SimuJobTransforms/scripts/
  • Tags for simulation: G4AtlasApps-00-02-87, CosmicGenerator-00-00-31, InDetSimEvent-00-04-09, G4CosmicFilter-00-00-10, SimuJobTransforms-00-07-86 (and some not yet committed updates)
  • Tags for digitization: CommissionUtils-00-00-21, PixelDigitization-00-07-13-02, SiDigitization-03-05-04, SCT_Digitization-00-11-13 . jobOptions attached.
  • The size of the ATLAS-GEO samples will be 50-100k events when finished.
  • To access the data use STAGE_SVCCLASS=atlasgroupdisk
  • Two filters: CosmicGenerator constrains the production vertex and direction of generator-level tracks, G4CosmicFilter requires simulated hits inside a certain volume - more details on the settings to come
  • Several questions lately: note that the mu+/mu- ratio in simulation (1.5) is not the same as in data. The simulation flux calculation uses this reference: A. Dar , Phys. Rev. Letters 51, 227 (1983)

List of geometries used:

  • ATLAS-GEO-03-00-00 (aligned, Solenoid On, Toroids On)
  • ATLAS-GEONF-04-00-00 (aligned, no magn field)
  • ATLAS-GEO-04-00-00 (aligned, Solenoid off, Toroids On)

List of simulation filter volumes used:

  • Muon (all of Atlas, geant volume is MUONQ2::MUONQ2)
  • TRT barrel (geant volume is TRT::BarrelOuterSupport)
  • Pixel barrel (has to have hits inside geant volumes TRT::BarrelOuterSupport and Pixel::Pixel)


Production with Muon Volume

  • so far only a few thousand test events. Pixel hit timing not correct for these. Can be found at ~gencomm/w0/cosmicSim_rel14/NoField/dig.muon*.root .

Production with TRT barrel Volume

  • About 27k at /castor/*.root
  • The corresponding hits files can be found in the ATLAS-GEO-03-00-00/sim directory

  • 24k at /castor/*.root
  • At the moment only files with numbers >= 200400 have the latest pixel digitization settings
  • The corresponding hits files can be found in the ATLAS-GEONF-04-00-00/hits directory

  • nothing submitted yet

Production with pixel barrel Volume

  • so far only test events: ~gencomm/w0/cosmicSim_rel14/dig.GEO-03.pixelbarrel_B1.root

  • test sample in ~gencomm/w0/cosmicSim_rel14/NoField has faulty pixel hit timing

  • test sample in ~gencomm/w0/cosmicSim_rel14/ToroidsOnly has faulty pixel hit timing

How to run reconstruction:

  • For now this is for a nightly (devval, rel_3) but this will become 14.5.0 very soon
  • get JO:
get_files -jo
  • edit this file with the following
add the lines:
after the importing of the flags.
edit the lines:
<             globalflags.DetDescrVersion.set_Value_and_Lock('ATLAS-Comm-02-00-00')
<             athenaCommonFlags.PoolRDOInput.set_Value_and_Lock( ["/afs/"])
to point to the dataset you want and to set teh DetDescrVersion correctly for that datset.
(you may also have to edit the lines:
to se the magnetic field configuration correctly).
for simulation made in rel 14 remove the line: 
edit the number of events you want to run over:
  • then run like:
athena -c RTTsim=True
  • This will run and produce ESD, CBNT. you can configure the job to also produce monitoring histograms, TAG_COMM, Jive xml by adding the appropriate rec flags.
(monitoring histograms fail if the run number changes during the job - which happens with old (<14) simulated cosmics)

Pending issues

  • Seems to be something funny going on with the truth (maybe reco related?) - see bug report 44779

-- ElseLytken - 27 Nov 2008

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Topic revision: r8 - 2008-12-03 - JamieBoyd
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