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SOR adjustment for some MC productions with ITS ramp-up offset #15897

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Merged
shahor02 merged 1 commit into from
Oct 5, 2026
+10 −0
Merged

SOR adjustment for some MC productions with ITS ramp-up offset #15897

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10 changes: 10 additions & 0 deletions DataFormats/Parameters/src/AggregatedRunInfo.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -131,6 +131,16 @@ void AggregatedRunInfo::adjust_from_MC(o2::ccdb::CCDBManagerInstance& ccdb,
} else {
LOG(warn) << "No OrbitsPerTF information found for MC production " << lpm_prod_tag << " and run number " << run_number;
}

// adjust SOR for some MC productions, where the ITS "ramp-up shift" of SOR was not a multiple of NOrbitsPerTF.
// (some MC productions are affected, before the problem was fixed on Oct 2, 2026)
if (lpm_prod_tag == "LHC26h3") {
// apply the SOR adjustment for this specific MC production
const int nOrbitsCorrection = 2; // a shift (number of orbits) for correction
orbitSOR += nOrbitsCorrection;
sor += nOrbitsCorrection * o2::constants::lhc::LHCOrbitMUS * 1000;
LOG(warn) << "AggregatedRunInfo.adjust_from_MC(): Applying SOR adjustment by " << nOrbitsCorrection << " orbits for MC production " << lpm_prod_tag << " and run number " << run_number;
}
}

AggregatedRunInfo AggregatedRunInfo::buildAggregatedRunInfo(o2::ccdb::CCDBManagerInstance& ccdb, int run_number, std::string const& lpm_prod_tag, std::string const& username)
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