Forum to exchange technical information to allow co-working on Monte Carlo Production for the test beam runs.

Responsible People

Mathias Götze from University of Wuppertal
Software related questions: Daniel Jeans

Scripts/databases

Oliver Wenze created an adaption of the ILD system for CALICE, but this is not in use any more (for reference: summary slides from Oliver, 5-Feb-2008 phone meeting, see also selected slides from Ivan Marchesini)

MC Request informations

If you want to have some file simulated, please write an email to Mathias (goetze_at_physik.uni-wuppertal.de) and make sure to provide the following information:

• particle type (electron, positron, pi-, pi+, proton, muon...)
• energy (e.g. 20 GeV)
• do you want digitization (usually you do, Mokka Output alone is missing plenty of effects like noise)
• reference run number from real data (e.g. 330650). This is needed as we do not simulate noise for the AHCal, but extract it from real runs. If you do not require digitization, this is not needed
• number of events you want. Usullay you want something in the order of 100.000 events, splitted in 10 to 20 files. (e.g. 5k x 20 files = 100k)
• detector model (e.g. TBCern0707_p0709 for CERN, TBFnal0508_p0709 for FermiLab)
• beam profile: What beam spread / position do you want to have? Usually you extract this information from the run you gave above by looking at the online monitor histograms of the drift chamber.
• physics list: If you have no idea what this is, go with QGSP_BERT
• software versions: usually the latest, e.g. calice v04-02 with ilc soft v01-10, mokka v07-04 and geant 4.0.3.p02
• position of HCal/ECal: you can introduce an offset for ECal/HCal to the positions in the detector model. E.g. ECal Cern August: X/Y: -27mm/-39.5mm or Cern October: 27.5mm/41.1mm

MC mass production for test beam

• see MonteCarloFiles
• How to download the following MC mass production from GRID Storage elements (SE) --> HowtoDownload
• Please check out "/grid/calice/tb-MCProduction/" folder for the updated MC mass production.

Separation of tasks

Agreed that running Mokka, digitisation of the Mokka output and reconstruction of digitised output should remain separate tasks (reco and digi separate Marlin processors), allowing revisions of each code separately. Expected that reco and digi would be run in a single Marlin job to run on the grid.

Official vs. user generated samples

The central MC production will be systematic, and details of code revisions used at each stage of processing, input steering files, logfiles and binaries used will be available.
Anyone may generate their own simulated samples of course, and is encouraged to make these public also. For compatibility, it would be sensible to start from the same steering files, etc., as for the official production runs. Proposals for improvements to the central production, e.g. better parametrisation of the beam profile, improved alignments, etc. would be very welcome.
We agreed that only "official", centrally produced MC samples should be used in analyses to be published, to ensure that Collaboration results are reliable and reproducible.
The CALICE Technical Board/Speakers' Bureau should consider whether this becomes official CALICE policy.

Earlier Samples Generated for 2006 data/LCWS'07

• See Lcws07Samples

User-Generated Samples

Various samples contributed by users, please add your samples here to share with others!

* Some files generated with a spatially uniform beam over the ECAL can be found at
/grid/calice/carlogan/tb2006/mc/FlatBeam

    the files are called G4_RunId_RandomSeed.slcio. 
    Random seeds 1000*** correspond to normally incident electrons, whereas RandomSeeds 3000*** correspond to electrons with a 7mrad tilt angle. 
    The energies follow the data energy for each run.
    The macro and steer files are in the subdirectory steer/
   

User-Requested MC Samples

People analysing the data are welcome to ask for additional samples to be generated, please add your requests to the "wish list"

Additional Geant4 (etc) modelling information

Some useful Geant4 modelling references in LCG-APP area, e.g. CERN-LCGAPP-2007-02, "Hadronic Shower Shape Studies in Geant4".

-- LarsWeuste - 13-Dec-2010