From 7a5f76025b6018014fd4fe25c0d2073682c7ebce Mon Sep 17 00:00:00 2001
From: Volker Friese <v.friese@gsi.de>
Date: Fri, 7 Jul 2023 12:06:51 +0200
Subject: [PATCH] Pass run start time to the digitizers. For STS, start noise
simulation at the run start time.
---
core/base/CbmDigitizeBase.h | 7 +++++++
sim/detectors/sts/CbmStsDigitize.cxx | 2 +-
sim/response/base/CbmDigitization.cxx | 1 +
sim/response/base/CbmDigitizationSource.h | 3 +++
4 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/core/base/CbmDigitizeBase.h b/core/base/CbmDigitizeBase.h
index a2bca30e46..b0321af639 100644
--- a/core/base/CbmDigitizeBase.h
+++ b/core/base/CbmDigitizeBase.h
@@ -170,10 +170,17 @@ public:
void SetProduceNoise(Bool_t choice = kTRUE) { fProduceNoise = choice; }
+ /** @brief Set the run start time
+ ** @param Run start time [ns]
+ **/
+ void SetRunStartTime(Double_t time) { fRunStartTime = time; }
+
+
protected:
Bool_t fEventMode; /// Flag for event-by-event mode
Bool_t fProduceNoise; /// Flag for production of inter-event noise
Bool_t fCreateMatches; /// Flag for creation of links to MC
+ Double_t fRunStartTime = 0; /// Start time of run [ns]
Int_t fCurrentInput; /// Number of current input
Int_t fCurrentEvent; /// Number of current MC event
Int_t fCurrentMCEntry; /// Number of current MC entry
diff --git a/sim/detectors/sts/CbmStsDigitize.cxx b/sim/detectors/sts/CbmStsDigitize.cxx
index 7778459d33..757f08b658 100644
--- a/sim/detectors/sts/CbmStsDigitize.cxx
+++ b/sim/detectors/sts/CbmStsDigitize.cxx
@@ -195,7 +195,7 @@ void CbmStsDigitize::Exec(Option_t* /*opt*/)
// --- Generate noise from previous to current event time
if (fParSim->Noise()) {
Int_t nNoise = 0;
- Double_t tNoiseStart = fNofEvents ? eventTimePrevious : 1000.;
+ Double_t tNoiseStart = fNofEvents ? eventTimePrevious : fRunStartTime;
Double_t tNoiseEnd = fCurrentEventTime;
for (auto& entry : fModules)
nNoise += entry.second->GenerateNoise(tNoiseStart, tNoiseEnd);
diff --git a/sim/response/base/CbmDigitization.cxx b/sim/response/base/CbmDigitization.cxx
index 9080ba6870..d59f860a08 100644
--- a/sim/response/base/CbmDigitization.cxx
+++ b/sim/response/base/CbmDigitization.cxx
@@ -378,6 +378,7 @@ void CbmDigitization::Run(Int_t event1, Int_t event2)
if (fMode == Mode::EventByEvent) digitizer->SetEventMode();
digitizer->SetProduceNoise(fProduceNoise);
digitizer->SetCreateMatches(fCreateMatches);
+ digitizer->SetRunStartTime(fSource->GetStartTime());
run->AddTask(digitizer);
LOG(info) << fName << ": Added task " << digitizer->GetName();
} //? active and digitizer instance present
diff --git a/sim/response/base/CbmDigitizationSource.h b/sim/response/base/CbmDigitizationSource.h
index 17517920ce..d9eb0c3ad0 100644
--- a/sim/response/base/CbmDigitizationSource.h
+++ b/sim/response/base/CbmDigitizationSource.h
@@ -137,6 +137,9 @@ public:
return kFILE;
}
+ /** @brief Run start time **/
+ Double_t GetStartTime() { return fTimeStart; }
+
/** @brief Abstract in base class. No implementation here. **/
virtual Bool_t Init();
--
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