X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=MUON%2FAliMUONSDigitizerV2.cxx;h=6dc06e05bd07180da0444b321b1d9ab3108534b1;hb=852fefb44eb9605f120a2d05c5180cc61eb6382b;hp=a7a589f3065fc7c600eee8a977924c14db15647e;hpb=3d1463c8f7148e36069c24f20cde34e096d5d6a9;p=u%2Fmrichter%2FAliRoot.git

diff --git a/MUON/AliMUONSDigitizerV2.cxx b/MUON/AliMUONSDigitizerV2.cxx
index a7a589f3065..6dc06e05bd0 100644
--- a/MUON/AliMUONSDigitizerV2.cxx
+++ b/MUON/AliMUONSDigitizerV2.cxx
@@ -16,21 +16,31 @@
 // $Id$
 
 #include <TClonesArray.h>
+#include <TParticle.h>
+#include <TTree.h>
 
 #include "AliMUONSDigitizerV2.h"
 
-#include "AliLog.h"
 #include "AliMUON.h"
 #include "AliMUONChamber.h"
 #include "AliMUONVDigit.h"
 #include "AliMUONHit.h"
-#include "AliMpDEManager.h"
+#include "AliMUONVDigitStore.h"
+#include "AliMUONVHitStore.h"
+#include "AliMUONResponseTrigger.h"
+#include "AliMUONConstants.h"
+
 #include "AliMpCDB.h"
+#include "AliMpDEManager.h"
+
+#include "AliLog.h"
+#include "AliCDBManager.h"
 #include "AliLoader.h"
 #include "AliRun.h"
 #include "AliRunLoader.h"
-#include "AliMUONVDigitStore.h"
-#include "AliMUONVHitStore.h"
+
+#include "AliHeader.h"
+#include "AliGenCocktailEventHeader.h"
 
 //-----------------------------------------------------------------------------
 /// The sdigitizer performs the transformation from hits (energy deposits by
@@ -50,15 +60,21 @@
 
 ClassImp(AliMUONSDigitizerV2)
 
+Float_t  AliMUONSDigitizerV2::fgkMaxIntTime = 10.0;
+Float_t  AliMUONSDigitizerV2::fgkMaxPosTimeDif = 1.22E-6;
+Float_t  AliMUONSDigitizerV2::fgkMaxNegTimeDif = -3.5E-6;
+Float_t  AliMUONSDigitizerV2::fgkMinTimeDif = 25E-9;
+
 //_____________________________________________________________________________
 AliMUONSDigitizerV2::AliMUONSDigitizerV2() 
-: TTask("AliMUONSDigitizerV2","From Hits to SDigits for MUON")
+: TNamed("AliMUONSDigitizerV2","From Hits to SDigits for MUON")
 {
   ///
   /// ctor.
   ///
-  if ( ! AliMpCDB::LoadMpSegmentation() ) 
-  {
+
+  // Load mapping
+  if ( ! AliMpCDB::LoadMpSegmentation() ) {
     AliFatal("Could not access mapping from OCDB !");
   }
 }
@@ -73,7 +89,7 @@ AliMUONSDigitizerV2::~AliMUONSDigitizerV2()
 
 //_____________________________________________________________________________
 void
-AliMUONSDigitizerV2::Exec(Option_t*)
+AliMUONSDigitizerV2::Digitize(Option_t*)
 {
   ///
   /// Go from hits to sdigits.
@@ -86,13 +102,13 @@ AliMUONSDigitizerV2::Exec(Option_t*)
   
   AliDebug(1,"");
   
-  AliRunLoader* runLoader = AliRunLoader::GetRunLoader();
+  AliRunLoader* runLoader = AliRunLoader::Instance();
   AliLoader* loader = runLoader->GetDetectorLoader("MUON");
-
+  
   loader->LoadHits("READ");
   
   AliMUON* muon = static_cast<AliMUON*>(gAlice->GetModule("MUON"));
-    
+  
   Int_t nofEvents(runLoader->GetNumberOfEvents());
   
   TString classname = muon->DigitStoreClassName();
@@ -104,8 +120,10 @@ AliMUONSDigitizerV2::Exec(Option_t*)
     AliFatal(Form("Could not create digitstore of class %s",classname.Data()));
   }
   
-  AliInfo(Form("Will use digitStore of type %s",sDigitStore->ClassName()));
-          
+  AliDebug(1,Form("Will use digitStore of type %s",sDigitStore->ClassName()));
+  
+  // average arrival time to chambers, for pileup studies
+  
   for ( Int_t iEvent = 0; iEvent < nofEvents; ++iEvent ) 
   {    
     // Loop over events.
@@ -114,20 +132,52 @@ AliMUONSDigitizerV2::Exec(Option_t*)
     
     AliDebug(1,Form("iEvent=%d",iEvent));
     runLoader->GetEvent(iEvent);
-  
+    
+    // for pile up studies
+    float t0=fgkMaxIntTime;  int aa=0;
+    AliHeader* header = runLoader->GetHeader();   
+    AliGenCocktailEventHeader* cocktailHeader =
+    dynamic_cast<AliGenCocktailEventHeader*>(header->GenEventHeader());
+    if (cocktailHeader) {
+      AliGenCocktailEventHeader* genEventHeader = (AliGenCocktailEventHeader*) (header->GenEventHeader());
+      TList* headers = genEventHeader->GetHeaders();
+      TIter nextH(headers);
+      AliGenEventHeader *entry; 
+      while((entry = (AliGenEventHeader*)nextH())) {
+        float t = entry->InteractionTime();	
+        if (TMath::Abs(t)<TMath::Abs(t0)) t0 = t;      
+        aa++;
+      }
+    } else {
+      AliGenEventHeader* evtHeader = 
+      (AliGenEventHeader*)(header->GenEventHeader());
+      if (evtHeader)
+      {  
+        float t = evtHeader->InteractionTime();		
+        if (TMath::Abs(t)<TMath::Abs(t0)) t0 = t;           
+        aa++;
+      }
+      else
+      {
+        // some generators may not offer a header, if which
+        // case we cannot get the interaction time, so we assume zero
+        t0 = 0.;
+      }
+    }
+    
     loader->MakeSDigitsContainer();
-
+    
     TTree* treeS = loader->TreeS();
-
+    
     if ( !treeS )
     {
       AliFatal("");
     }
-
+    
     sDigitStore->Connect(*treeS);
     
     TTree* treeH = loader->TreeH();
-
+    
     AliMUONVHitStore* hitStore = AliMUONVHitStore::Create(*treeH);
     hitStore->Connect(*treeH);
     
@@ -137,7 +187,7 @@ AliMUONSDigitizerV2::Exec(Option_t*)
     {
       // Loop over the tracks of this event.
       treeH->GetEvent(iTrack);
-
+      
       AliMUONHit* hit;
       TIter next(hitStore->CreateIterator());
       Int_t ihit(0);
@@ -145,21 +195,39 @@ AliMUONSDigitizerV2::Exec(Option_t*)
       while ( ( hit = static_cast<AliMUONHit*>(next()) ) )       
       {
         Int_t chamberId = hit->Chamber()-1;
+        Float_t age = hit->Age()-t0;
+        
         AliMUONChamber& chamber = muon->Chamber(chamberId);
         AliMUONResponse* response = chamber.ResponseModel();
         
         // This is the heart of this method : the dis-integration
         TList digits;        
-        response->DisIntegrate(*hit,digits);
+        if (aa>1){  // if there are pileup events
+          Float_t chamberTime = AliMUONConstants::AverageChamberT(chamberId);
+          Float_t timeDif=age-chamberTime;	  
+          if (timeDif>fgkMaxPosTimeDif || timeDif<fgkMaxNegTimeDif) {
+            continue;
+          }
+          if(TMath::Abs(timeDif)>fgkMinTimeDif){
+            response->DisIntegrate(*hit,digits,timeDif);
+          }
+          else{
+            response->DisIntegrate(*hit,digits,0.);
+          }
+        }
+        else{
+          response->DisIntegrate(*hit,digits,0.);
+        }
         
-        TIter next(&digits);
+        TIter nextd(&digits);
         AliMUONVDigit* d;
-        while ( ( d = (AliMUONVDigit*)next() ) )
+        while ( ( d = (AliMUONVDigit*)nextd() ) )
         {
           // Update some sdigit information that could not be known
           // by the DisIntegrate method
           d->SetHit(ihit);
-          d->AddTrack(iTrack,d->Charge());
+          d->SetTime(age);
+          d->AddTrack(hit->GetTrack(),d->Charge());
           tdlist.Add(d);
         }
         ++ihit;
@@ -172,17 +240,15 @@ AliMUONSDigitizerV2::Exec(Option_t*)
     
     while ( ( d = static_cast<AliMUONVDigit*>(next()) ) )
     {
-      if ( d->Charge() > 0 ) // that check would be better in the disintegrate
-        // method, but to compare with old sdigitizer, it has to be there.
+      d->ChargeInFC(kTRUE);
+      
+      AliMUONVDigit* added = sDigitStore->Add(*d,AliMUONVDigitStore::kMerge);
+      if (!added)
       {
-        AliMUONVDigit* added = sDigitStore->Add(*d,AliMUONVDigitStore::kMerge);
-        if (!added)
-        {
-          AliError("Could not add digit to digitStore");
-        }
+        AliError("Could not add digit to digitStore");
       }
     }
-
+    
     treeS->Fill();
     
     loader->WriteSDigits("OVERWRITE");
@@ -198,4 +264,5 @@ AliMUONSDigitizerV2::Exec(Option_t*)
   loader->UnloadHits();  
   
   delete sDigitStore;
+  
 }