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Give the QED interaction spec the size of the QED event pool #2440

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Merged
sawenzel merged 1 commit into from
Aug 24, 2026
Merged

Give the QED interaction spec the size of the QED event pool #2440

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6 changes: 5 additions & 1 deletion MC/bin/o2dpg_sim_workflow.py
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Original file line number Diff line number Diff line change
Expand Up @@ -659,7 +659,11 @@ def getDPL_global_options(bigshm=False, ccdbbackend=True, runcommand=True):
includeQED = False
else:
qedrate = INTRATE * QEDXSecExpected[COLTYPE] / XSecSys[COLTYPE] # hadronic interaction rate * cross_section_ratio
qedspec = 'qed' + ',' + str(qedrate) + ',10000000:' + str(NEventsQED)
# the QED events are reused in a round robin, so both numbers are the size of the QED pool.
# Older O2 versions wrap the QED event IDs at the first number instead of the second one and
# would otherwise put event IDs into the MC labels which are not in the QED kinematics.
# See https://its.cern.ch/jira/browse/O2-7132
qedspec = 'qed' + ',' + str(qedrate) + ',' + str(NEventsQED) + ':' + str(NEventsQED)

PreCollContextTask['cmd'] = task_finalizer([
'${O2_ROOT}/bin/o2-steer-colcontexttool',
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