Introduction of HLT dE/dx (C.Cheshkov)

diff --git a/MONITOR/AliMonitorHLT.cxx b/MONITOR/AliMonitorHLT.cxx
index 9c2a517af280ce45db8922242f1de086f36b98fa..0ca4b34525712d0c5c1a48c011d8237fe006521f 100644 (file)
--- a/MONITOR/AliMonitorHLT.cxx
+++ b/MONITOR/AliMonitorHLT.cxx
@@ -29,6 +29,7 @@
 #include "AliL3SpacePointData.h"
 #include "AliL3TrackArray.h"
 #include "AliL3Track.h"
+#include "AliL3Transform.h"
 #endif
 
 //_____________________________________________________________________________
@@ -85,6 +86,28 @@ void AliMonitorHLT::CreateHistos(TFolder* folder)
   fTrackPhi = CreateHisto1("TrackPhi", "phi distribution of tracks", 
                           120, 0, 360, "#phi [#circ]", "#Delta N/N",
                           AliMonitorHisto::kNormEntries);
+
+  fTrackNHits = CreateHisto1("TrackNHits", "Number of hits per track", 
+                          200, 0, 200, "N_{hits}", "#Delta N/N",
+                          AliMonitorHisto::kNormEntries);
+
+  fTrackDEdxVsP = CreateHisto2("TrackDEdxVsP", "dE/dx of tracks", 
+                              100, 0, 3, 100, 0, 1000, 
+                              "p [GeV/c]", "dE/dx", "#Delta N/N",
+                              AliMonitorHisto::kNormEntries);
+
+  fTrackDz0 = CreateHisto1("TrackDz0", "Dz0 of tracks", 
+                          100, -100, 100, "#Delta z0 [cm]", "#Delta N/N",
+                          AliMonitorHisto::kNormEntries);
+
+  fTrackDr0 = CreateHisto1("TrackDr0", "Dr0 of tracks", 
+                          130, 80, 250, "#Delta r0 [cm]", "#Delta N/N",
+                          AliMonitorHisto::kNormEntries);
+
+  fTrackAngle = CreateHisto1("TrackAngle", "azimutal distribution of tracks", 
+                          100, -4, 4, " ", "#Delta N/N",
+                          AliMonitorHisto::kNormEntries);
+
 }
 
 
@@ -99,32 +122,32 @@ void AliMonitorHLT::FillHistos(AliRunLoader* /*runLoader*/,
   Warning("FillHistos", "the code was compiled without HLT support");
 
 #else
-  AliL3MemHandler memHandler;
+  AliL3MemHandler clusterHandler[36];
+  AliL3SpacePointData *clusters[36];
   for (Int_t iSector = 0; iSector < fParam->GetNInnerSector(); iSector++) {
     char fileName[256];
     sprintf(fileName, "hlt/points_%d_-1.raw", iSector);
-    if (!memHandler.SetBinaryInput(fileName)) {
+    if (!clusterHandler[iSector].SetBinaryInput(fileName)) {
       Warning("FillHistos", "could not open file %s", fileName);
       continue;
     }
-    AliL3SpacePointData* clusters = 
-      (AliL3SpacePointData*) memHandler.Allocate();
+    clusters[iSector] = (AliL3SpacePointData*) clusterHandler[iSector].Allocate();
     UInt_t nClusters = 0;
-    memHandler.Binary2Memory(nClusters, clusters);
+    clusterHandler[iSector].Binary2Memory(nClusters, clusters[iSector]);
 
     for (UInt_t iCluster = 0; iCluster < nClusters; iCluster++) {
-      AliL3SpacePointData& cluster = clusters[iCluster];
+      AliL3SpacePointData& cluster = clusters[iSector][iCluster];
       fClustersCharge->Fill(cluster.fCharge);
       fNClustersVsRow->Fill(cluster.fPadRow);
       fNClustersVsSector->Fill(iSector);
     }
 
-    memHandler.Free();
-    memHandler.CloseBinaryInput();
+    clusterHandler[iSector].CloseBinaryInput();
   }
 
   fNClustersVsSector->ScaleErrorBy(10.);
 
+  AliL3MemHandler memHandler;
   if (!memHandler.SetBinaryInput("hlt/tracks.raw")) {
     Warning("FillHistos", "could not open file hlt/tracks.raw");
     return;
@@ -134,10 +157,57 @@ void AliMonitorHLT::FillHistos(AliRunLoader* /*runLoader*/,
 
   fNTracks->Fill(tracks->GetNTracks());
   for (Int_t iTrack = 0; iTrack < tracks->GetNTracks(); iTrack++) {
-    AliL3Track* track = tracks->GetTrack(iTrack);
+    AliL3Track* track = tracks->GetCheckedTrack(iTrack);
+    if(!track) continue;
+    track->CalculateHelix();
     fTrackPt->Fill(track->GetPt());
     fTrackEta->Fill(track->GetPseudoRapidity());
     fTrackPhi->Fill(track->GetPsi() * TMath::RadToDeg());
+    fTrackDz0->Fill(track->GetZ0());
+    fTrackDr0->Fill(track->GetR0());
+    fTrackNHits->Fill(track->GetNHits());
+
+    // Track dEdx
+    Int_t nc=track->GetNHits();
+    UInt_t *hits = track->GetHitNumbers();
+    Float_t sampleDEdx[159];
+    for (Int_t iHit = 0; iHit < nc; iHit++) {
+      UInt_t hitID = hits[iHit];
+      Int_t iSector = (hitID>>25) & 0x7f;
+      UInt_t position = hitID&0x3fffff;
+      UChar_t padrow = clusters[iSector][position].fPadRow;
+      Float_t pWidth = AliL3Transform::GetPadPitchWidthLow();
+      if (padrow>63)
+       pWidth = AliL3Transform::GetPadPitchWidthUp(); 
+      Float_t corr=1.; if (padrow>63) corr=0.67;
+      sampleDEdx[iHit] = clusters[iSector][position].fCharge/pWidth*corr;
+      Double_t crossingangle = track->GetCrossingAngle(padrow,iSector);
+      fTrackAngle->Fill(crossingangle);
+      Double_t s = sin(crossingangle);
+      Double_t t = track->GetTgl();
+      sampleDEdx[iHit] *= TMath::Sqrt((1-s*s)/(1+t*t));
+    }
+
+    /* Cook dEdx */
+    Int_t i;
+    Int_t swap;//stupid sorting
+    do {
+      swap=0;
+      for (i=0; i<nc-1; i++) {
+       if (sampleDEdx[i]<=sampleDEdx[i+1]) continue;
+       Float_t tmp=sampleDEdx[i];
+       sampleDEdx[i]=sampleDEdx[i+1]; sampleDEdx[i+1]=tmp;
+       swap++;
+      }
+    } while (swap);
+
+    Double_t low=0.05; Double_t up=0.7;
+    Int_t nl=Int_t(low*nc), nu=Int_t(up*nc);
+    Float_t trackDEdx=0;
+    for (i=nl; i<=nu; i++) trackDEdx += sampleDEdx[i];
+    trackDEdx /= (nu-nl+1);
+
+    fTrackDEdxVsP->Fill(track->GetP(),trackDEdx);
   }
 
   delete tracks;

diff --git a/MONITOR/AliMonitorHLT.h b/MONITOR/AliMonitorHLT.h
index 16c10156f403393532502000d7d3a3c6248d67f1..de9b4e335ee52907b6168b7b6757ccb82b3a65b2 100644 (file)
--- a/MONITOR/AliMonitorHLT.h
+++ b/MONITOR/AliMonitorHLT.h
@@ -30,6 +30,11 @@ private:
   AliMonitorHisto* fTrackPt;            // pt distribution of HLT tracks
   AliMonitorHisto* fTrackEta;           // eta distribution of HLT tracks
   AliMonitorHisto* fTrackPhi;           // phi distribution of HLT tracks
+  AliMonitorHisto* fTrackNHits;         // number of hits per HLT track
+  AliMonitorHisto* fTrackDEdxVsP;       // dedx distribution of HLT tracks
+  AliMonitorHisto* fTrackDz0;           // dz0 distribution of HLT tracks
+  AliMonitorHisto* fTrackDr0;           // dr0 distribution of HLT tracks
+  AliMonitorHisto* fTrackAngle;         // azimutal distribution of HLT tracks
 
   ClassDef(AliMonitorHLT, 0)   // creation and filling of monitor histograms for HLT
 };