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[Common] Add interaction rate histograms #16399

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ddobrigk merged 1 commit into from
May 26, 2026
+25 −15
Merged

[Common] Add interaction rate histograms #16399

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40 changes: 25 additions & 15 deletions Common/Tasks/centralityStudy.cxx
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
// Copyright 2019-2020 CERN and copyright holders of ALICE O2.

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[name/workflow-file] 

Name of a workflow file must match the name of the main struct in it (without the PWG prefix). (Class implementation files should be in "Core" directories.)
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
Expand Down Expand Up @@ -244,6 +244,7 @@
histos.add("hNGlobalTracks", "hNGlobalTracks", kTH1D, {axisMultUltraFineGlobalTracks});
histos.add("hNMFTTracks", "hNMFTTracks", kTH1D, {axisMultUltraFineMFTTracks});
histos.add("hNPVContributors", "hNPVContributors", kTH1D, {axisMultUltraFinePVContributors});
histos.add("hInteractionRate", "hInteractionRate", kTH1D, {axisInteractionRate});

histos.add("hFT0CvsPVz_Collisions", "hFT0CvsPVz_Collisions", kTProfile, {axisPVz});
histos.add("hFT0AvsPVz_Collisions", "hFT0AvsPVz_Collisions", kTProfile, {axisPVz});
Expand Down Expand Up @@ -332,6 +333,8 @@
histos.add("hFT0A_BCs", "hFT0A_BCs", kTH1D, {axisMultUltraFineFT0A});
histos.add("hFT0M_BCs", "hFT0M_BCs", kTH1D, {axisMultUltraFineFT0M});
histos.add("hFV0A_BCs", "hFV0A_BCs", kTH1D, {axisMultUltraFineFV0A});
histos.add("hInteractionRate_BCs", "hInteractionRate_BCs", kTH1D, {axisInteractionRate});

histos.add("hFV0AT0C_BCs", "hFV0AT0C_BCs", kTH1D, {axisMultUltraFineFV0AT0C});
histos.add("hScaledFT0M_BCs", "hScaledFT0M_BCs", kTH1D, {axisMultUltraFineScaledFT0M});
histos.add("hScaledFV0AT0C_BCs", "hScaledFV0AT0C_BCs", kTH1D, {axisMultUltraFineScaledFV0AT0C});
Expand Down Expand Up @@ -494,6 +497,7 @@
histPointers.insert({histPath + "hPVzProfileCoVsTime", histos.add((histPath + "hPVzProfileCoVsTime").c_str(), "hPVzProfileCoVsTime", {kTProfile, {{axisDeltaTimestamp}}})});
histPointers.insert({histPath + "hPVzProfileBcVsTime", histos.add((histPath + "hPVzProfileBcVsTime").c_str(), "hPVzProfileBcVsTime", {kTProfile, {{axisDeltaTimestamp}}})});
histPointers.insert({histPath + "hIRProfileVsTime", histos.add((histPath + "hIRProfileVsTime").c_str(), "hIRProfileVsTime", {kTProfile, {{axisDeltaTimestamp}}})});
histPointers.insert({histPath + "hInteractionRate", histos.add((histPath + "hInteractionRate").c_str(), "hInteractionRate", {kTH1D, {{axisInteractionRate}}})});
}
}

Expand Down Expand Up @@ -861,24 +865,26 @@

if constexpr (requires { collision.has_multBC(); }) {
if (collision.has_multBC()) {
initRun(collision);
auto multbc = collision.template multBC_as<aod::MultBCs>();
uint64_t bcTimestamp = multbc.timestamp();
const float hoursAfterStartOfRun = static_cast<float>(bcTimestamp - startOfRunTimestamp) / 3600000.0;
const float interactionRate = mRateFetcher.fetch(ccdb.service, bcTimestamp, mRunNumber, irSource.value, irCrashOnNull) / 1000.; // kHz

if (studies.doTimeStudies && studies.doRunByRunHistograms) {
getHist(TH2, histPath + "hFT0AVsTime")->Fill(hoursAfterStartOfRun, collision.multFT0A());
getHist(TH2, histPath + "hFT0CVsTime")->Fill(hoursAfterStartOfRun, collision.multFT0C());
getHist(TH2, histPath + "hFT0MVsTime")->Fill(hoursAfterStartOfRun, collision.multFT0M());
getHist(TH2, histPath + "hFV0AVsTime")->Fill(hoursAfterStartOfRun, collision.multFV0A());
getHist(TH2, histPath + "hFV0AOuterVsTime")->Fill(hoursAfterStartOfRun, collision.multFV0AOuter());
getHist(TH2, histPath + "hMFTTracksVsTime")->Fill(hoursAfterStartOfRun, collision.mftNtracks());
getHist(TH2, histPath + "hNGlobalVsTime")->Fill(hoursAfterStartOfRun, collision.multNTracksGlobal());
getHist(TH2, histPath + "hNTPVContributorsVsTime")->Fill(hoursAfterStartOfRun, collision.multPVTotalContributors());
getHist(TProfile, histPath + "hPVzProfileCoVsTime")->Fill(hoursAfterStartOfRun, collision.multPVz());
getHist(TProfile, histPath + "hPVzProfileBcVsTime")->Fill(hoursAfterStartOfRun, multbc.multFT0PosZ());
getHist(TProfile, histPath + "hIRProfileVsTime")->Fill(hoursAfterStartOfRun, interactionRate);
histos.fill(HIST("hInteractionRate"), interactionRate);
if (studies.doRunByRunHistograms) {
getHist(TH1, histPath + "hInteractionRate")->Fill(interactionRate);
if (studies.doTimeStudies) {
const float hoursAfterStartOfRun = static_cast<float>(bcTimestamp - startOfRunTimestamp) / 3600000.0;
getHist(TH2, histPath + "hFT0AVsTime")->Fill(hoursAfterStartOfRun, collision.multFT0A());
getHist(TH2, histPath + "hFT0CVsTime")->Fill(hoursAfterStartOfRun, collision.multFT0C());
getHist(TH2, histPath + "hFT0MVsTime")->Fill(hoursAfterStartOfRun, collision.multFT0M());
getHist(TH2, histPath + "hFV0AVsTime")->Fill(hoursAfterStartOfRun, collision.multFV0A());
getHist(TH2, histPath + "hFV0AOuterVsTime")->Fill(hoursAfterStartOfRun, collision.multFV0AOuter());
getHist(TH2, histPath + "hMFTTracksVsTime")->Fill(hoursAfterStartOfRun, collision.mftNtracks());
getHist(TH2, histPath + "hNGlobalVsTime")->Fill(hoursAfterStartOfRun, collision.multNTracksGlobal());
getHist(TH2, histPath + "hNTPVContributorsVsTime")->Fill(hoursAfterStartOfRun, collision.multPVTotalContributors());
getHist(TProfile, histPath + "hPVzProfileCoVsTime")->Fill(hoursAfterStartOfRun, collision.multPVz());
getHist(TProfile, histPath + "hPVzProfileBcVsTime")->Fill(hoursAfterStartOfRun, multbc.multFT0PosZ());
getHist(TProfile, histPath + "hIRProfileVsTime")->Fill(hoursAfterStartOfRun, interactionRate);
}
}
}
}
Expand Down Expand Up @@ -936,7 +942,7 @@
histos.fill(HIST("hBCSelection"), 3); // FV0OrA
}

if (bcsel.vertexZwithT0 < 100.0f) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
if (!bc.multFT0PosZValid()) {
return false;
}
Expand Down Expand Up @@ -1007,6 +1013,10 @@
histos.fill(HIST("hFV0A_BCs"), multbc.multFV0A() * scale.factorFV0A);
histos.fill(HIST("hFV0AT0C_BCs"), (multbc.multFV0A() + multbc.multFT0C()) * scale.factorFV0AT0C);

uint64_t bcTimestamp = multbc.timestamp();
const float interactionRate = mRateFetcher.fetch(ccdb.service, bcTimestamp, mRunNumber, irSource.value, irCrashOnNull) / 1000.; // kHz
histos.fill(HIST("hInteractionRate_BCs"), interactionRate);

if (studies.do2DPlots) {
histos.fill(HIST("hFT0AVsFT0C_BCs"), multbc.multFT0C() * scale.factorFT0C, multbc.multFT0A() * scale.factorFT0A);
histos.fill(HIST("hFV0AVsFT0C_BCs"), multbc.multFT0C() * scale.factorFT0C, multbc.multFV0A() * scale.factorFV0A);
Expand Down
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