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Default TPC loopers in o2-sim #14851

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Merged
sawenzel merged 12 commits into from
Jan 5, 2026
Merged

Default TPC loopers in o2-sim #14851

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f60eb58
First implementation of loopers inclusion in base Generator class
jackal1-66 Sep 25, 2025
8457c65
Merge branch 'AliceO2Group:dev' into loopers
jackal1-66 Sep 25, 2025
045213b
Various improvements
jackal1-66 Sep 26, 2025
bc55d0a
Vetoing loopers for FlatGas and \!collisioncontext
jackal1-66 Oct 12, 2025
883bc8e
Implemented rate and collision system dependence (default)
jackal1-66 Oct 24, 2025
c156a31
Set automatic interaction rate from collision context
jackal1-66 Nov 20, 2025
19e77a3
Fixed bug + cleaned code
jackal1-66 Nov 24, 2025
b773e93
Improved logging + colsys check
jackal1-66 Nov 24, 2025
b81a2ee
Please consider the following formatting changes
alibuild Nov 25, 2025
5669efa
Merge pull request #17 from alibuild/alibot-cleanup-14851
jackal1-66 Nov 25, 2025
797f283
Add copyright headers
jackal1-66 Nov 25, 2025
ba6a1a7
Corrected include folder
jackal1-66 Nov 25, 2025
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Fixed bug + cleaned code
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@jackal1-66
jackal1-66 committed Nov 24, 2025
commit 19e77a34afacafea149ce4d49dcd28fe08b232c6
4 changes: 2 additions & 2 deletions Generators/include/Generators/TPCLoopersParam.h
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Expand Up @@ -39,8 +39,8 @@ struct GenTPCLoopersParam : public o2::conf::ConfigurableParamHelper<GenTPCLoope
std::string colsys = "PbPb"; // collision system (PbPb or pp)
int intrate = -1; // Automatic IR from collision context if -1, else user-defined interaction rate in Hz
bool flat_gas = true; // if true, the gas density is considered flat in the TPC volume
unsigned int nFlatGasLoopers = 500; // number of loopers to be generated per event in case of flat gas
float fraction_pairs = 0.08; // fraction of loopers
unsigned int nFlatGasLoopers = 500; // number of loopers to be generated per event in case of flat gas [currently unused, kept for possible future debug developments]
float fraction_pairs = 0.08; // fraction of loopers [currently unused, kept for possible future debug developments]
float multiplier[2] = {1., 1.}; // multiplier for pairs and compton loopers for Poissonian and Gaussian sampling
unsigned int fixedNLoopers[2] = {1, 1}; // fixed number of loopers coming from pairs and compton electrons - valid if flat gas is false and both Poisson and Gaussian params files are empty
float adjust_flatgas = 0.f; // adjustment for the number of flat gas loopers per orbit (in percentage, e.g. -0.1 = -10%) [-1, inf)]
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4 changes: 1 addition & 3 deletions Generators/src/Generator.cxx
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Expand Up @@ -106,8 +106,6 @@ bool Generator::initLoopersGen()
return kFALSE;
}
}
const auto& nFlatGasLoopers = loopersParam.nFlatGasLoopers;
const auto& fraction_pairs = loopersParam.fraction_pairs;
std::array<float, 2> multiplier = {loopersParam.multiplier[0], loopersParam.multiplier[1]};
unsigned int nLoopersPairs = loopersParam.fixedNLoopers[0];
unsigned int nLoopersCompton = loopersParam.fixedNLoopers[1];
Expand Down Expand Up @@ -170,7 +168,7 @@ bool Generator::initLoopersGen()
mLoopersGen->SetAdjust(loopersParam.adjust_flatgas);
}
} else {
// Otherwise, Poisson+Gauss sampling or fixed number of loopers will be used
// Otherwise, Poisson+Gauss sampling or fixed number of loopers per event will be used
// Multiplier is applied only with distribution sampling
// This configuration can be used for testing purposes, in all other cases flat gas is recommended
mLoopersGen->SetNLoopers(nLoopersPairs, nLoopersCompton);
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4 changes: 0 additions & 4 deletions Generators/src/TPCLoopers.cxx
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Expand Up @@ -27,10 +27,6 @@ void Scaler::load(const std::string &filename)
normal_max = jsonArrayToVector(doc["normal"]["max"]);
outlier_center = jsonArrayToVector(doc["outlier"]["center"]);
outlier_scale = jsonArrayToVector(doc["outlier"]["scale"]);
std::vector<double> normal_min;
std::vector<double> normal_max;
std::vector<double> outlier_center;
std::vector<double> outlier_scale;
}

std::vector<double> Scaler::inverse_transform(const std::vector<double> &input)
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