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Fix decreasing time trend of loopers in last event #2102

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jackal1-66 merged 1 commit into from
Aug 22, 2025
Merged

Fix decreasing time trend of loopers in last event #2102

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12 changes: 10 additions & 2 deletions MC/config/common/external/generator/TPCLoopers.C
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
#include <rapidjson/document.h>
#include "CCDB/CCDBTimeStampUtils.h"
#include "CCDB/CcdbApi.h"
#include "DetectorsRaw/HBFUtils.h"

// Static Ort::Env instance for multiple onnx model loading
static Ort::Env global_env(ORT_LOGGING_LEVEL_WARNING, "GlobalEnv");
Expand Down Expand Up @@ -219,9 +220,9 @@ class GenTPCLoopers : public Generator
{
unsigned int nLoopers, nLoopersPairs, nLoopersCompton;
LOG(debug) << "mCurrentEvent is " << mCurrentEvent;
LOG(debug) << "Current event time: " << ((mCurrentEvent < mInteractionTimeRecords.size() - 1) ? std::to_string(mInteractionTimeRecords[mCurrentEvent + 1].bc2ns() - mInteractionTimeRecords[mCurrentEvent].bc2ns()) : std::to_string(mIntTimeRecMean)) << " ns";
LOG(debug) << "Current event time: " << ((mCurrentEvent < mInteractionTimeRecords.size() - 1) ? std::to_string(mInteractionTimeRecords[mCurrentEvent + 1].bc2ns() - mInteractionTimeRecords[mCurrentEvent].bc2ns()) : std::to_string(mTimeEnd - mInteractionTimeRecords[mCurrentEvent].bc2ns())) << " ns";
LOG(debug) << "Current time offset wrt BC: " << mInteractionTimeRecords[mCurrentEvent].getTimeOffsetWrtBC() << " ns";
mTimeLimit = (mCurrentEvent < mInteractionTimeRecords.size() - 1) ? mInteractionTimeRecords[mCurrentEvent + 1].bc2ns() - mInteractionTimeRecords[mCurrentEvent].bc2ns() : mIntTimeRecMean;
mTimeLimit = (mCurrentEvent < mInteractionTimeRecords.size() - 1) ? mInteractionTimeRecords[mCurrentEvent + 1].bc2ns() - mInteractionTimeRecords[mCurrentEvent].bc2ns() : mTimeEnd - mInteractionTimeRecords[mCurrentEvent].bc2ns();
// With flat gas the number of loopers are adapted based on time interval widths
nLoopers = mFlatGasNumber * (mTimeLimit / mIntTimeRecMean);
nLoopersPairs = static_cast<unsigned int>(std::round(nLoopers * mLoopsFractionPairs));
Expand Down Expand Up @@ -424,6 +425,12 @@ class GenTPCLoopers : public Generator
mIntTimeRecMean += mInteractionTimeRecords[c + 1].bc2ns() - mInteractionTimeRecords[c].bc2ns();
}
mIntTimeRecMean /= (mInteractionTimeRecords.size() - 1); // Average interaction time record used as reference
const auto& hbfUtils = o2::raw::HBFUtils::Instance();
// Get the start time of the second orbit after the last interaction record
const auto& lastIR = mInteractionTimeRecords.back();
o2::InteractionRecord finalOrbitIR(0, lastIR.orbit + 2); // Final orbit, BC = 0
mTimeEnd = finalOrbitIR.bc2ns();
LOG(debug) << "Final orbit start time: " << mTimeEnd << " ns while last interaction record time is " << mInteractionTimeRecords.back().bc2ns() << " ns";
}
} else {
mFlatGasNumber = -1;
Expand Down Expand Up @@ -470,6 +477,7 @@ class GenTPCLoopers : public Generator
Int_t mFlatGasNumber = -1; // Number of flat gas loopers per event
double mIntTimeRecMean = 1.0; // Average interaction time record used for the reference
double mTimeLimit = 0.0; // Time limit for the current event
double mTimeEnd = 0.0; // Time limit for the last event
float mLoopsFractionPairs = 0.08; // Fraction of loopers from Pairs
};

Expand Down