External Generators

External generators

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QEDLoader.C / QEDepem.C

• Invokes TGenEpEmv1 generator from AEGIS package for Pb-Pb → e+e- generation.
  • optional parameters are rapidity and pT ranges to generate, can be provided as key/value option, e.g. o2-sim -n 1000 -m PIPE ITS -g external --configKeyValues 'GeneratorExternal.fileName=$O2_ROOT/share/Generators/external/QEDLoader.C;QEDGenParam.yMin=-3;QEDGenParam.ptMin=0.001' The x-section of the process depends on the applied cuts, it is calculated on the fly and stored in the qedgenparam.ini file.

GenCosmicsLoader.C / GenCosmics.C

• Invokes GenerateCosmics generators from AEGIS package.

o2-sim -n1000 -m PIPE ITS TPC -g extgen --configKeyValues "GeneratorExternal.fileName=$O2_ROOT/share/Generators/external/GenCosmicsLoader.C"

Generation options can be changed by providing --configKeyValues "cosmics.maxAngle=30.;cosmics.accept=ITS0" etc. For instance, to generate track defined at radius 500 cm, with maximal angle wrt the azimuth of 40 degress and passing via ITS layer 0 at Y=0:

o2-sim -n100 -m PIPE ITS TPC -g extgen --configKeyValues "cosmics.maxAngle=40.;cosmics.accept=ITS0;cosmics.origin=500;GeneratorExternal.fileName=$O2_ROOT/share/Generators/external/GenCosmicsLoader.C"

See GenCosmicsParam class for available options.