* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.6 2000/06/07 16:27:32 cblume
-Try to remove compiler warnings on Sun and HP
-
-Revision 1.5 2000/05/09 16:38:57 cblume
-Removed PadResponse(). Merge problem
-
-Revision 1.4 2000/05/08 15:53:45 cblume
-Resolved merge conflict
-
-Revision 1.3 2000/04/28 14:49:27 cblume
-Only one declaration of iDict in MakeDigits()
-
-Revision 1.1.4.1 2000/05/08 14:42:04 cblume
-Introduced AliTRDdigitsManager
-
-Revision 1.1 2000/02/28 19:00:13 cblume
-Add new TRD classes
-
-*/
+/* $Id$ */
///////////////////////////////////////////////////////////////////////////////
// //
// Creates and handles digits from TRD hits //
+// Author: C. Blume (C.Blume@gsi.de) //
// //
// The following effects are included: //
// - Diffusion //
// - ExB effects //
// - Gas gain including fluctuations //
// - Pad-response (simple Gaussian approximation) //
+// - Time-response //
// - Electronics noise //
// - Electronics gain //
// - Digitization //
// The corresponding parameter can be adjusted via the various //
// Set-functions. If these parameters are not explicitly set, default //
// values are used (see Init-function). //
-// To produce digits from a root-file with TRD-hits use the //
-// slowDigitsCreate.C macro. //
+// As an example on how to use this class to produce digits from hits //
+// have a look at the macro hits2digits.C //
+// The production of summable digits is demonstrated in hits2sdigits.C //
+// and the subsequent conversion of the s-digits into normal digits is //
+// explained in sdigits2digits.C. //
// //
///////////////////////////////////////////////////////////////////////////////
+#include <stdlib.h>
+
#include <TMath.h>
#include <TVector.h>
#include <TRandom.h>
+#include <TROOT.h>
+#include <TTree.h>
+#include <TFile.h>
+#include <TF1.h>
+#include <TList.h>
+#include <TTask.h>
+
+#include "AliRun.h"
+#include "AliRunLoader.h"
+#include "AliLoader.h"
+#include "AliConfig.h"
+#include "AliMagF.h"
+#include "AliRunDigitizer.h"
+#include "AliRunLoader.h"
+#include "AliLoader.h"
#include "AliTRD.h"
+#include "AliTRDhit.h"
#include "AliTRDdigitizer.h"
#include "AliTRDdataArrayI.h"
#include "AliTRDdataArrayF.h"
+#include "AliTRDsegmentArray.h"
#include "AliTRDdigitsManager.h"
+#include "AliTRDgeometry.h"
+#include "AliTRDparameter.h"
ClassImp(AliTRDdigitizer)
//_____________________________________________________________________________
-AliTRDdigitizer::AliTRDdigitizer():TNamed()
+AliTRDdigitizer::AliTRDdigitizer()
{
//
// AliTRDdigitizer default constructor
//
- fInputFile = NULL;
- fDigits = NULL;
- fTRD = NULL;
- fGeo = NULL;
- fPRF = NULL;
-
- fEvent = 0;
- fGasGain = 0.0;
- fNoise = 0.0;
- fChipGain = 0.0;
- fADCoutRange = 0.0;
- fADCinRange = 0.0;
- fADCthreshold = 0;
- fDiffusionOn = 0;
- fDiffusionT = 0.0;
- fDiffusionL = 0.0;
- fElAttachOn = 0;
- fElAttachProp = 0.0;
- fExBOn = 0;
- fLorentzAngle = 0.0;
-
+ fRunLoader = 0;
+ fDigitsManager = 0;
+ fSDigitsManager = 0;
+ fSDigitsManagerList = 0;
+ fTRD = 0;
+ fGeo = 0;
+ fPar = 0;
+ fEvent = 0;
+ fMasks = 0;
+ fCompress = kTRUE;
+ fDebug = 0;
+ fSDigits = kFALSE;
+ fSDigitsScale = 0.0;
+ fMergeSignalOnly = kFALSE;
+ fSimpleSim = kFALSE;
+ fSimpleDet = 0;
+
}
//_____________________________________________________________________________
AliTRDdigitizer::AliTRDdigitizer(const Text_t *name, const Text_t *title)
- :TNamed(name,title)
+ :AliDigitizer(name,title)
{
//
- // AliTRDdigitizer default constructor
+ // AliTRDdigitizer constructor
//
- fInputFile = NULL;
- fDigits = NULL;
- fTRD = NULL;
- fGeo = NULL;
-
- fEvent = 0;
-
- Init();
+ fRunLoader = 0;
+
+ //NewIO: These data members probably are not needed anymore
+ fDigitsManager = 0;
+ fSDigitsManager = 0;
+ fSDigitsManagerList = 0;
+ fTRD = 0;
+ fGeo = 0;
+ fPar = 0;
+ //End NewIO comment
+ fEvent = 0;
+ fMasks = 0;
+ fCompress = kTRUE;
+ fDebug = 0;
+ fSDigits = kFALSE;
+ fSDigitsScale = 100.; // For the summable digits
+ fMergeSignalOnly = kFALSE;
+ fSimpleSim = kFALSE;
+ fSimpleDet = 0;
+
}
//_____________________________________________________________________________
-AliTRDdigitizer::AliTRDdigitizer(AliTRDdigitizer &d)
+AliTRDdigitizer::AliTRDdigitizer(AliRunDigitizer *manager
+ , const Text_t *name, const Text_t *title)
+ :AliDigitizer(manager,name,title)
{
//
- // AliTRDdigitizer copy constructor
+ // AliTRDdigitizer constructor
//
- d.Copy(*this);
+ fRunLoader = 0;
+ fDigitsManager = 0;
+ fSDigitsManager = 0;
+ fSDigitsManagerList = 0;
+ fTRD = 0;
+ fGeo = 0;
+ fPar = 0;
+ fEvent = 0;
+ fMasks = 0;
+ fCompress = kTRUE;
+ fDebug = 0;
+ fSDigits = kFALSE;
+ fSDigitsScale = 100.; // For the summable digits
+ fMergeSignalOnly = kFALSE;
+ fSimpleSim = kFALSE;
+ fSimpleDet = 0;
+
}
//_____________________________________________________________________________
-AliTRDdigitizer::~AliTRDdigitizer()
+AliTRDdigitizer::AliTRDdigitizer(AliRunDigitizer *manager)
+ :AliDigitizer(manager,"AliTRDdigitizer","TRD digitizer")
{
//
- // AliTRDdigitizer destructor
+ // AliTRDdigitizer constructor
//
- if (fInputFile) {
- fInputFile->Close();
- delete fInputFile;
- }
- if (fDigits) {
- delete fDigits;
- }
+ fRunLoader = 0;
+ fDigitsManager = 0;
+ fSDigitsManager = 0;
+ fSDigitsManagerList = 0;
+ fTRD = 0;
+ fGeo = 0;
+ fPar = 0;
+ fEvent = 0;
+ fMasks = 0;
+ fCompress = kTRUE;
+ fDebug = 0;
+ fSDigits = kFALSE;
+ fSDigitsScale = 100.; // For the summable digits
+ fMergeSignalOnly = kFALSE;
+ fSimpleSim = kFALSE;
+ fSimpleDet = 0;
- if (fPRF) delete fPRF;
}
//_____________________________________________________________________________
-void AliTRDdigitizer::Copy(AliTRDdigitizer &d)
+AliTRDdigitizer::AliTRDdigitizer(const AliTRDdigitizer &d):AliDigitizer(d)
{
//
- // Copy function
+ // AliTRDdigitizer copy constructor
//
- d.fInputFile = NULL;
- d.fDigits = NULL;
- d.fTRD = NULL;
- d.fGeo = NULL;
+ ((AliTRDdigitizer &) d).Copy(*this);
- d.fEvent = 0;
+}
+
+//_____________________________________________________________________________
+AliTRDdigitizer::~AliTRDdigitizer()
+{
+ //
+ // AliTRDdigitizer destructor
+ //
- d.fGasGain = fGasGain;
- d.fNoise = fNoise;
- d.fChipGain = fChipGain;
- d.fADCoutRange = fADCoutRange;
- d.fADCinRange = fADCinRange;
- d.fADCthreshold = fADCthreshold;
- d.fDiffusionOn = fDiffusionOn;
- d.fDiffusionT = fDiffusionT;
- d.fDiffusionL = fDiffusionL;
- d.fElAttachOn = fElAttachOn;
- d.fElAttachProp = fElAttachProp;
- d.fExBOn = fExBOn;
- d.fLorentzAngle = fLorentzAngle;
- d.fLorentzFactor = fLorentzFactor;
- fPRF->Copy(*d.fPRF);
+ if (fDigitsManager) {
+ delete fDigitsManager;
+ fDigitsManager = 0;
+ }
+
+ fSDigitsManager = 0;
+
+ if (fSDigitsManagerList) {
+ fSDigitsManagerList->Delete();
+ delete fSDigitsManagerList;
+ fSDigitsManagerList = 0;
+ }
+
+ if (fMasks) {
+ delete [] fMasks;
+ fMasks = 0;
+ }
}
//_____________________________________________________________________________
-Int_t AliTRDdigitizer::Diffusion(Float_t driftlength, Float_t *xyz)
+AliTRDdigitizer &AliTRDdigitizer::operator=(const AliTRDdigitizer &d)
{
//
- // Applies the diffusion smearing to the position of a single electron
+ // Assignment operator
//
- Float_t driftSqrt = TMath::Sqrt(driftlength);
- Float_t sigmaT = driftSqrt * fDiffusionT;
- Float_t sigmaL = driftSqrt * fDiffusionL;
- xyz[0] = gRandom->Gaus(xyz[0], sigmaL * fLorentzFactor);
- xyz[1] = gRandom->Gaus(xyz[1], sigmaT * fLorentzFactor);
- xyz[2] = gRandom->Gaus(xyz[2], sigmaT);
- return 1;
+ if (this != &d) ((AliTRDdigitizer &) d).Copy(*this);
+ return *this;
}
//_____________________________________________________________________________
-Int_t AliTRDdigitizer::ExB(Float_t driftlength, Float_t *xyz)
+void AliTRDdigitizer::Copy(TObject &d)
{
//
- // Applies E x B effects to the position of a single electron
+ // Copy function
//
- xyz[0] = xyz[0];
- xyz[1] = xyz[1] + fLorentzAngle * driftlength;
- xyz[2] = xyz[2];
-
- return 1;
-
+ ((AliTRDdigitizer &) d).fRunLoader = 0;
+ ((AliTRDdigitizer &) d).fDigitsManager = 0;
+ ((AliTRDdigitizer &) d).fSDigitsManager = 0;
+ ((AliTRDdigitizer &) d).fSDigitsManagerList = 0;
+ ((AliTRDdigitizer &) d).fTRD = 0;
+ ((AliTRDdigitizer &) d).fGeo = 0;
+ ((AliTRDdigitizer &) d).fPar = 0;
+ ((AliTRDdigitizer &) d).fEvent = 0;
+ ((AliTRDdigitizer &) d).fMasks = 0;
+ ((AliTRDdigitizer &) d).fCompress = fCompress;
+ ((AliTRDdigitizer &) d).fDebug = fDebug ;
+ ((AliTRDdigitizer &) d).fSDigits = fSDigits;
+ ((AliTRDdigitizer &) d).fSDigitsScale = fSDigitsScale;
+ ((AliTRDdigitizer &) d).fMergeSignalOnly = fMergeSignalOnly;
+ ((AliTRDdigitizer &) d).fSimpleSim = fSimpleSim;
+ ((AliTRDdigitizer &) d).fSimpleDet = fSimpleDet;
+
}
//_____________________________________________________________________________
-void AliTRDdigitizer::Init()
+void AliTRDdigitizer::Exec(Option_t* option)
{
//
- // Initializes the digitization procedure with standard values
+ // Executes the merging
//
- // The default parameter for the digitization
- fGasGain = 2.0E3;
- fNoise = 3000.;
- fChipGain = 10.;
- fADCoutRange = 255.;
- fADCinRange = 2000.;
- fADCthreshold = 1;
+ Int_t iInput;
- // Transverse and longitudinal diffusion coefficients (Xe/Isobutane)
- fDiffusionOn = 1;
- fDiffusionT = 0.060;
- fDiffusionL = 0.017;
+ AliTRDdigitsManager *sdigitsManager;
- // Propability for electron attachment
- fElAttachOn = 0;
- fElAttachProp = 0.0;
+ TString optionString = option;
+ if (optionString.Contains("deb")) {
+ fDebug = 1;
+ if (optionString.Contains("2")) {
+ fDebug = 2;
+ }
+ printf("<AliTRDdigitizer::Exec> ");
+ printf("Called with debug option %d\n",fDebug);
+ }
- // E x B effects
- fExBOn = 0;
- // omega * tau. (tau ~ 12 * 10^-12, B = 0.2T)
- fLorentzAngle = 17.6 * 12.0 * 0.2 * 0.01;
+ // The AliRoot file is already connected by the manager
+ AliRunLoader* inrl;
+
+ if (gAlice)
+ {
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::Exec> ");
+ printf("AliRun object found on file.\n");
+ }
+ }
+ else {
+ inrl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(0));
+ inrl->LoadgAlice();
+ gAlice = inrl->GetAliRun();
+ if (!gAlice)
+ {
+ printf("<AliTRDdigitizer::Exec> ");
+ printf("Could not find AliRun object.\n");
+ return;
+ }
+ }
+
+ Int_t nInput = fManager->GetNinputs();
+ fMasks = new Int_t[nInput];
+ for (iInput = 0; iInput < nInput; iInput++) {
+ fMasks[iInput] = fManager->GetMask(iInput);
+ }
+
+ // Initialization
+
+ AliRunLoader* orl = AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
+ if (InitDetector()) {
+ AliLoader* ogime = orl->GetLoader("TRDLoader");
+
+ TTree* tree = 0;
+ if (fSDigits)
+ {
+ //if we produce SDigits
+ tree = ogime->TreeS();
+ if (!tree)
+ {
+ ogime->MakeTree("S");
+ tree = ogime->TreeS();
+ }
+ }
+ else
+ {//if we produce Digits
+ tree = ogime->TreeD();
+ if (!tree)
+ {
+ ogime->MakeTree("D");
+ tree = ogime->TreeD();
+ }
+ }
+ MakeBranch(tree);
+ }
+
+ for (iInput = 0; iInput < nInput; iInput++) {
+
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::Exec> ");
+ printf("Add input stream %d\n",iInput);
+ }
+
+ // check if the input tree exists
+ inrl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
+ AliLoader* gime = inrl->GetLoader("TRDLoader");
+
+ TTree * treees = gime->TreeS();
+ if (treees == 0x0)
+ {
+ if (gime->LoadSDigits())
+ {
+ Error("Exec","Error Occured while loading S. Digits for input %d.",iInput);
+ return;
+ }
+ treees = gime->TreeS();
+ }
+
+ if (treees == 0x0) {
+ printf("<AliTRDdigitizer::Exec> ");
+ printf("Input stream %d does not exist\n",iInput);
+ return;
+ }
+
+ // Read the s-digits via digits manager
+ sdigitsManager = new AliTRDdigitsManager();
+ sdigitsManager->SetDebug(fDebug);
+ sdigitsManager->SetSDigits(kTRUE);
+
+ AliRunLoader* rl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
+ AliLoader* gimme = rl->GetLoader("TRDLoader");
+ if (!gimme->TreeS()) gimme->LoadSDigits();
+ sdigitsManager->ReadDigits(gimme->TreeS());
+
+ // Add the s-digits to the input list
+ AddSDigitsManager(sdigitsManager);
+
+ }
+
+ // Convert the s-digits to normal digits
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::Exec> ");
+ printf("Do the conversion\n");
+ }
+ SDigits2Digits();
+
+ // Store the digits
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::Exec> ");
+ printf("Write the digits\n");
+ }
+
+ fDigitsManager->WriteDigits();
+
+ //Write parameters
+ orl->CdGAFile();
+ if (!gFile->Get("TRDParameter")) GetParameter()->Write();
+
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::Exec> ");
+ printf("Done\n");
+ }
- // The pad response function
- fPRF = new TF1("PRF","[0]*([1]+exp(-x*x/(2.0*[2])))",-2,2);
- fPRF->SetParameter(0, 0.8872);
- fPRF->SetParameter(1,-0.00573);
- fPRF->SetParameter(2, 0.454 * 0.454);
+ DeleteSDigitsManager();
}
//_____________________________________________________________________________
-Bool_t AliTRDdigitizer::Open(const Char_t *name, Int_t nEvent)
+Bool_t AliTRDdigitizer::Open(const Char_t *file, Int_t nEvent)
{
//
// Opens a ROOT-file with TRD-hits and reads in the hit-tree
//
// Connect the AliRoot file containing Geometry, Kine, and Hits
- fInputFile = (TFile*) gROOT->GetListOfFiles()->FindObject(name);
- if (!fInputFile) {
- printf("AliTRDdigitizer::Open -- ");
- printf("Open the ALIROOT-file %s.\n",name);
- fInputFile = new TFile(name,"UPDATE");
- }
- else {
- printf("AliTRDdigitizer::Open -- ");
- printf("%s is already open.\n",name);
- }
-
- gAlice = (AliRun*) fInputFile->Get("gAlice");
+
+ fRunLoader = AliRunLoader::Open(file,AliConfig::fgkDefaultEventFolderName,
+ "UPDATE");
+
+ if (!fRunLoader)
+ {
+ Error("Open","Can not open session for file %s.",file);
+ return kFALSE;
+ }
+
+ fRunLoader->LoadgAlice();
+ gAlice = fRunLoader->GetAliRun();
+
if (gAlice) {
- printf("AliTRDdigitizer::Open -- ");
- printf("AliRun object found on file.\n");
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::Open> ");
+ printf("AliRun object found on file.\n");
+ }
}
else {
- printf("AliTRDdigitizer::Open -- ");
+ printf("<AliTRDdigitizer::Open> ");
printf("Could not find AliRun object.\n");
return kFALSE;
}
fEvent = nEvent;
// Import the Trees for the event nEvent in the file
- Int_t nparticles = gAlice->GetEvent(fEvent);
- if (nparticles <= 0) {
- printf("AliTRDdigitizer::Open -- ");
- printf("No entries in the trees for event %d.\n",fEvent);
+ fRunLoader->GetEvent(fEvent);
+
+ AliLoader* loader = fRunLoader->GetLoader("TRDLoader");
+ if (!loader)
+ {
+ Error("Open","Can not get TRD loader from Run Loader");
+ return kFALSE;
+ }
+
+ if (InitDetector()) {
+ TTree* tree = 0;
+ if (fSDigits)
+ {
+ //if we produce SDigits
+ tree = loader->TreeS();
+ if (!tree)
+ {
+ loader->MakeTree("S");
+ tree = loader->TreeS();
+ }
+ }
+ else
+ {//if we produce Digits
+ tree = loader->TreeD();
+ if (!tree)
+ {
+ loader->MakeTree("D");
+ tree = loader->TreeD();
+ }
+ }
+ return MakeBranch(tree);
+ }
+ else {
return kFALSE;
}
+}
+
+//_____________________________________________________________________________
+Bool_t AliTRDdigitizer::InitDetector()
+{
+ //
+ // Sets the pointer to the TRD detector and the geometry
+ //
+
+ // Get the pointer to the detector class and check for version 1
+ fTRD = (AliTRD *) gAlice->GetDetector("TRD");
+ if (!fTRD) {
+ printf("<AliTRDdigitizer::InitDetector> ");
+ printf("No TRD module found\n");
+ exit(1);
+ }
+ if (fTRD->IsVersion() != 1) {
+ printf("<AliTRDdigitizer::InitDetector> ");
+ printf("TRD must be version 1 (slow simulator).\n");
+ exit(1);
+ }
+
+ // Get the geometry
+ fGeo = fTRD->GetGeometry();
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::InitDetector> ");
+ printf("Geometry version %d\n",fGeo->IsVersion());
+ }
+
+ // Create a digits manager
+ delete fDigitsManager;
+ fDigitsManager = new AliTRDdigitsManager();
+ fDigitsManager->SetSDigits(fSDigits);
+ fDigitsManager->CreateArrays();
+ fDigitsManager->SetEvent(fEvent);
+ fDigitsManager->SetDebug(fDebug);
+
+ // The list for the input s-digits manager to be merged
+ if (fSDigitsManagerList) {
+ fSDigitsManagerList->Delete();
+ } else {
+ fSDigitsManagerList = new TList();
+ }
+
return kTRUE;
}
+//_____________________________________________________________________________
+Bool_t AliTRDdigitizer::MakeBranch(TTree* tree) const
+{
+ //
+ // Create the branches for the digits array
+ //
+
+ return fDigitsManager->MakeBranch(tree);
+
+}
+
//_____________________________________________________________________________
Bool_t AliTRDdigitizer::MakeDigits()
{
//
- // Loops through the TRD-hits and creates the digits.
+ // Creates digits.
//
///////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////
// Converts number of electrons to fC
- const Float_t kEl2fC = 1.602E-19 * 1.0E15;
+ const Double_t kEl2fC = 1.602E-19 * 1.0E15;
///////////////////////////////////////////////////////////////
- Int_t iRow, iCol, iTime;
+ // Number of pads included in the pad response
+ const Int_t kNpad = 3;
+
+ // Number of track dictionary arrays
+ const Int_t kNDict = AliTRDdigitsManager::kNDict;
+
+ // Half the width of the amplification region
+ const Float_t kAmWidth = AliTRDgeometry::AmThick() / 2.;
+
+ Int_t iRow, iCol, iTime, iPad;
+ Int_t iDict = 0;
Int_t nBytes = 0;
- Int_t iDict;
Int_t totalSizeDigits = 0;
Int_t totalSizeDict0 = 0;
Int_t totalSizeDict1 = 0;
Int_t totalSizeDict2 = 0;
- AliTRDdataArrayI *digits;
+ Int_t timeTRDbeg = 0;
+ Int_t timeTRDend = 1;
+
+ Float_t pos[3];
+ Float_t rot[3];
+ Float_t xyz[3];
+ Float_t padSignal[kNpad];
+ Float_t signalOld[kNpad];
+
+ AliTRDdataArrayF *signals = 0;
+ AliTRDdataArrayI *digits = 0;
AliTRDdataArrayI *dictionary[kNDict];
+ // Create a default parameter class if none is defined
+ if (!fPar) {
+ fPar = new AliTRDparameter("TRDparameter","Standard TRD parameter");
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Create the default parameter object\n");
+ }
+ }
+
+ // Create a container for the amplitudes
+ AliTRDsegmentArray *signalsArray
+ = new AliTRDsegmentArray("AliTRDdataArrayF"
+ ,AliTRDgeometry::Ndet());
+
+ if (fPar->TRFOn()) {
+ timeTRDbeg = ((Int_t) (-fPar->GetTRFlo() / fPar->GetTimeBinSize())) - 1;
+ timeTRDend = ((Int_t) ( fPar->GetTRFhi() / fPar->GetTimeBinSize())) - 1;
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Sample the TRF between -%d and %d\n",timeTRDbeg,timeTRDend);
+ }
+ }
+
+ Float_t elAttachProp = fPar->GetElAttachProp() / 100.;
+
if (!fGeo) {
- printf("AliTRDdigitizer::MakeDigits -- ");
+ printf("<AliTRDdigitizer::MakeDigits> ");
printf("No geometry defined\n");
return kFALSE;
}
- // Create a digits manager
- fDigits = new AliTRDdigitsManager();
-
- // Create detector arrays to keep the signal and track numbers
- AliTRDdataArrayF *signal = new AliTRDdataArrayF();
- AliTRDdataArrayI *tracks[kNDict];
- for (iDict = 0; iDict < kNDict; iDict++) {
- tracks[iDict] = new AliTRDdataArrayI();
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Start creating digits.\n");
}
- // Get the pointer to the hit tree
- TTree *hitTree = gAlice->TreeH();
-
+ AliLoader* gimme = fRunLoader->GetLoader("TRDLoader");
+ if (!gimme->TreeH()) gimme->LoadHits();
+ TTree* hitTree = gimme->TreeH();
+ if (hitTree == 0x0)
+ {
+ Error("MakeDigits","Can not get TreeH");
+ return kFALSE;
+ }
+ fTRD->SetTreeAddress();
+
// Get the number of entries in the hit tree
// (Number of primary particles creating a hit somewhere)
- Int_t nTrack = (Int_t) hitTree->GetEntries();
+ Int_t nTrack = 1;
+ if (!fSimpleSim) {
+ nTrack = (Int_t) hitTree->GetEntries();
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Found %d primary particles\n",nTrack);
+ }
+ }
- printf("AliTRDdigitizer::MakeDigits -- ");
- printf("Start creating digits.\n");
+ Int_t detectorOld = -1;
+ Int_t countHits = 0;
- // The Lorentz factor
- if (fExBOn) {
- fLorentzFactor = 1.0 / (1.0 + fLorentzAngle*fLorentzAngle);
- }
- else {
- fLorentzFactor = 1.0;
- }
-
- Int_t chamBeg = 0;
- Int_t chamEnd = kNcham;
- if (fTRD->GetSensChamber() >= 0) {
- chamBeg = fTRD->GetSensChamber();
- chamEnd = chamBeg + 1;
- }
- Int_t planBeg = 0;
- Int_t planEnd = kNplan;
- if (fTRD->GetSensPlane() >= 0) {
- planBeg = fTRD->GetSensPlane();
- planEnd = planBeg + 1;
- }
- Int_t sectBeg = 0;
- Int_t sectEnd = kNsect;
-
- Int_t countHits = 0;
-
- // Loop through all the chambers
- for (Int_t iCham = chamBeg; iCham < chamEnd; iCham++) {
- for (Int_t iPlan = planBeg; iPlan < planEnd; iPlan++) {
- for (Int_t iSect = sectBeg; iSect < sectEnd; iSect++) {
-
- if (fTRD->GetSensSector() >= 0) {
- Int_t sens1 = fTRD->GetSensSector();
- Int_t sens2 = sens1 + fTRD->GetSensSectorRange();
- sens2 -= ((Int_t) (sens2 / kNsect)) * kNsect;
- if (sens1 < sens2)
- if ((iSect < sens1) || (iSect >= sens2)) continue;
- else
- if ((iSect < sens1) && (iSect >= sens2)) continue;
- }
+ // Loop through all entries in the tree
+ for (Int_t iTrack = 0; iTrack < nTrack; iTrack++) {
- Int_t nDigits = 0;
-
- printf("AliTRDdigitizer::MakeDigits -- ");
- printf("Digitizing chamber %d, plane %d, sector %d.\n"
- ,iCham,iPlan,iSect);
-
- Int_t iDet = fGeo->GetDetector(iPlan,iCham,iSect);
- Int_t nRowMax = fGeo->GetRowMax(iPlan,iCham,iSect);
- Int_t nColMax = fGeo->GetColMax(iPlan);
- Int_t nTimeMax = fGeo->GetTimeMax();
- Float_t row0 = fGeo->GetRow0(iPlan,iCham,iSect);
- Float_t col0 = fGeo->GetCol0(iPlan);
- Float_t time0 = fGeo->GetTime0(iPlan);
- Float_t rowPadSize = fGeo->GetRowPadSize();
- Float_t colPadSize = fGeo->GetColPadSize();
- Float_t timeBinSize = fGeo->GetTimeBinSize();
-
- // Adjust the size of the detector arrays
- signal->Allocate(nRowMax,nColMax,nTimeMax);
- for (iDict = 0; iDict < kNDict; iDict++) {
- tracks[iDict]->Allocate(nRowMax,nColMax,nTimeMax);
- }
+ if (!fSimpleSim) {
+ gAlice->ResetHits();
+ nBytes += hitTree->GetEvent(iTrack);
+ }
- // Loop through all entries in the tree
- for (Int_t iTrack = 0; iTrack < nTrack; iTrack++) {
+ // Loop through the TRD hits
+ Int_t iHit = 0;
+ AliTRDhit *hit = (AliTRDhit *) fTRD->FirstHit(-1);
+ while (hit) {
+
+ countHits++;
+ iHit++;
+
+ pos[0] = hit->X();
+ pos[1] = hit->Y();
+ pos[2] = hit->Z();
+ Float_t q = hit->GetCharge();
+ Int_t track = hit->Track();
+ Int_t detector = hit->GetDetector();
+ Int_t plane = fGeo->GetPlane(detector);
+ Int_t sector = fGeo->GetSector(detector);
+ Int_t chamber = fGeo->GetChamber(detector);
+ Int_t nRowMax = fPar->GetRowMax(plane,chamber,sector);
+ Int_t nColMax = fPar->GetColMax(plane);
+ Int_t nTimeMax = fPar->GetTimeMax();
+ Int_t nTimeBefore = fPar->GetTimeBefore();
+ Int_t nTimeAfter = fPar->GetTimeAfter();
+ Int_t nTimeTotal = fPar->GetTimeTotal();
+ Float_t row0 = fPar->GetRow0(plane,chamber,sector);
+ Float_t col0 = fPar->GetCol0(plane);
+ Float_t time0 = fPar->GetTime0(plane);
+ Float_t rowPadSize = fPar->GetRowPadSize(plane,chamber,sector);
+ Float_t colPadSize = fPar->GetColPadSize(plane);
+ Float_t timeBinSize = fPar->GetTimeBinSize();
+ Float_t divideRow = 1.0 / rowPadSize;
+ Float_t divideCol = 1.0 / colPadSize;
+ Float_t divideTime = 1.0 / timeBinSize;
+
+ if (fDebug > 1) {
+ printf("Analyze hit no. %d ",iHit);
+ printf("-----------------------------------------------------------\n");
+ hit->Dump();
+ printf("plane = %d, sector = %d, chamber = %d\n"
+ ,plane,sector,chamber);
+ printf("nRowMax = %d, nColMax = %d, nTimeMax = %d\n"
+ ,nRowMax,nColMax,nTimeMax);
+ printf("nTimeBefore = %d, nTimeAfter = %d, nTimeTotal = %d\n"
+ ,nTimeBefore,nTimeAfter,nTimeTotal);
+ printf("row0 = %f, col0 = %f, time0 = %f\n"
+ ,row0,col0,time0);
+ printf("rowPadSize = %f, colPadSize = %f, timeBinSize = %f\n"
+ ,rowPadSize,colPadSize,timeBinSize);
+ }
+
+ // Don't analyze test hits and switched off detectors
+ if ((CheckDetector(plane,chamber,sector)) &&
+ (((Int_t) q) != 0)) {
- gAlice->ResetHits();
- nBytes += hitTree->GetEvent(iTrack);
+ if (detector != detectorOld) {
- // Get the number of hits in the TRD created by this particle
- Int_t nHit = fTRD->Hits()->GetEntriesFast();
+ if (fDebug > 1) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Get new container. New det = %d, Old det = %d\n"
+ ,detector,detectorOld);
+ }
+ // Compress the old one if enabled
+ if ((fCompress) && (detectorOld > -1)) {
+ if (fDebug > 1) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Compress the old container ...");
+ }
+ signals->Compress(1,0);
+ for (iDict = 0; iDict < kNDict; iDict++) {
+ dictionary[iDict]->Compress(1,0);
+ }
+ if (fDebug > 1) printf("done\n");
+ }
+ // Get the new container
+ signals = (AliTRDdataArrayF *) signalsArray->At(detector);
+ if (signals->GetNtime() == 0) {
+ // Allocate a new one if not yet existing
+ if (fDebug > 1) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Allocate a new container ... ");
+ }
+ signals->Allocate(nRowMax,nColMax,nTimeTotal);
+ }
+ else if (fSimpleSim) {
+ // Clear an old one for the simple simulation
+ if (fDebug > 1) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Clear a old container ... ");
+ }
+ signals->Clear();
+ }
+ else {
+ // Expand an existing one
+ if (fCompress) {
+ if (fDebug > 1) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Expand an existing container ... ");
+ }
+ signals->Expand();
+ }
+ }
+ // The same for the dictionary
+ if (!fSimpleSim) {
+ for (iDict = 0; iDict < kNDict; iDict++) {
+ dictionary[iDict] = fDigitsManager->GetDictionary(detector,iDict);
+ if (dictionary[iDict]->GetNtime() == 0) {
+ dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
+ }
+ else {
+ if (fCompress) dictionary[iDict]->Expand();
+ }
+ }
+ }
+ if (fDebug > 1) printf("done\n");
+ detectorOld = detector;
+ }
+
+ // Rotate the sectors on top of each other
+ if (fSimpleSim) {
+ rot[0] = pos[0];
+ rot[1] = pos[1];
+ rot[2] = pos[2];
+ }
+ else {
+ fGeo->Rotate(detector,pos,rot);
+ }
- // Loop through the TRD hits
- for (Int_t iHit = 0; iHit < nHit; iHit++) {
+ // The driftlength. It is negative if the hit is in the
+ // amplification region.
+ Float_t driftlength = time0 - rot[0];
+
+ // Take also the drift in the amplification region into account
+ // The drift length is at the moment still the same, regardless of
+ // the position relativ to the wire. This non-isochronity needs still
+ // to be implemented.
+ Float_t driftlengthL = TMath::Abs(driftlength + kAmWidth);
+ if (fPar->ExBOn()) driftlengthL /= TMath::Sqrt(fPar->GetLorentzFactor());
+
+ // Loop over all electrons of this hit
+ // TR photons produce hits with negative charge
+ Int_t nEl = ((Int_t) TMath::Abs(q));
+ for (Int_t iEl = 0; iEl < nEl; iEl++) {
+
+ xyz[0] = rot[0];
+ xyz[1] = rot[1];
+ xyz[2] = rot[2];
+
+ // Electron attachment
+ if (fPar->ElAttachOn()) {
+ if (gRandom->Rndm() < (driftlengthL * elAttachProp))
+ continue;
+ }
- countHits++;
+ // Apply the diffusion smearing
+ if (fPar->DiffusionOn()) {
+ if (!(fPar->Diffusion(driftlengthL,xyz))) continue;
+ }
- AliTRDhit *hit = (AliTRDhit *) fTRD->Hits()->UncheckedAt(iHit);
- Float_t pos[3];
- pos[0] = hit->fX;
- pos[1] = hit->fY;
- pos[2] = hit->fZ;
- Float_t q = hit->GetCharge();
- Int_t track = hit->fTrack;
- Int_t detector = hit->GetDetector();
- Int_t plane = fGeo->GetPlane(detector);
- Int_t sector = fGeo->GetSector(detector);
- Int_t chamber = fGeo->GetChamber(detector);
+ // Apply E x B effects (depends on drift direction)
+ if (fPar->ExBOn()) {
+ if (!(fPar->ExB(driftlength+kAmWidth,xyz))) continue;
+ }
- if ((sector != iSect) ||
- (plane != iPlan) ||
- (chamber != iCham))
- continue;
+ // The electron position after diffusion and ExB in pad coordinates
+ // The pad row (z-direction)
+ Float_t rowDist = xyz[2] - row0;
+ Int_t rowE = ((Int_t) (rowDist * divideRow));
+ if ((rowE < 0) || (rowE >= nRowMax)) continue;
+ Float_t rowOffset = ((((Float_t) rowE) + 0.5) * rowPadSize) - rowDist;
+
+ // The pad column (rphi-direction)
+ Float_t col0tilt = fPar->Col0Tilted(col0,rowOffset,plane);
+ Float_t colDist = xyz[1] - col0tilt;
+ Int_t colE = ((Int_t) (colDist * divideCol));
+ if ((colE < 0) || (colE >= nColMax)) continue;
+ Float_t colOffset = ((((Float_t) colE) + 0.5) * colPadSize) - colDist;
+
+ // The time bin (negative for hits in the amplification region)
+ // In the amplification region the electrons drift from both sides
+ // to the middle (anode wire plane)
+ Float_t timeDist = time0 - xyz[0];
+ Float_t timeOffset = 0;
+ Int_t timeE = 0;
+ if (timeDist > 0) {
+ // The time bin
+ timeE = ((Int_t) (timeDist * divideTime));
+ // The distance of the position to the middle of the timebin
+ timeOffset = ((((Float_t) timeE) + 0.5) * timeBinSize) - timeDist;
+ }
+ else {
+ // Difference between half of the amplification gap width and
+ // the distance to the anode wire
+ Float_t anodeDist = kAmWidth - TMath::Abs(timeDist + kAmWidth);
+ // The time bin
+ timeE = -1 * (((Int_t ) (anodeDist * divideTime)) + 1);
+ // The distance of the position to the middle of the timebin
+ timeOffset = ((((Float_t) timeE) + 0.5) * timeBinSize) + anodeDist;
+ }
+
+ // Apply the gas gain including fluctuations
+ Float_t ggRndm = 0.0;
+ do {
+ ggRndm = gRandom->Rndm();
+ } while (ggRndm <= 0);
+ Int_t signal = (Int_t) (-fPar->GetGasGain() * TMath::Log(ggRndm));
+
+ // Apply the pad response
+ if (fPar->PRFOn()) {
+ // The distance of the electron to the center of the pad
+ // in units of pad width
+ Float_t dist = - colOffset * divideCol;
+ if (!(fPar->PadResponse(signal,dist,plane,padSignal))) continue;
+ }
+ else {
+ padSignal[0] = 0.0;
+ padSignal[1] = signal;
+ padSignal[2] = 0.0;
+ }
- // Rotate the sectors on top of each other
- Float_t rot[3];
- fGeo->Rotate(detector,pos,rot);
-
- // The hit position in pad coordinates (center pad)
- // The pad row (z-direction)
- Int_t rowH = (Int_t) ((rot[2] - row0) / rowPadSize);
- // The pad column (rphi-direction)
- Int_t colH = (Int_t) ((rot[1] - col0) / colPadSize);
- // The time bucket
- Int_t timeH = (Int_t) ((rot[0] - time0) / timeBinSize);
-
- // Array to sum up the signal in a box surrounding the
- // hit postition
- const Int_t kTimeBox = 7;
- const Int_t kColBox = 9;
- const Int_t kRowBox = 7;
- Float_t signalSum[kRowBox][kColBox][kTimeBox];
- for (iRow = 0; iRow < kRowBox; iRow++ ) {
- for (iCol = 0; iCol < kColBox; iCol++ ) {
- for (iTime = 0; iTime < kTimeBox; iTime++) {
- signalSum[iRow][iCol][iTime] = 0;
- }
- }
+ // Sample the time response inside the drift region
+ // + additional time bins before and after.
+ // The sampling is done always in the middle of the time bin
+ for (Int_t iTimeBin = TMath::Max(timeE-timeTRDbeg, -nTimeBefore)
+ ;iTimeBin < TMath::Min(timeE+timeTRDend,nTimeMax+nTimeAfter )
+ ;iTimeBin++) {
+
+ // Apply the time response
+ Float_t timeResponse = 1.0;
+ Float_t crossTalk = 0.0;
+ Float_t time = (iTimeBin - timeE) * timeBinSize + timeOffset;
+ if (fPar->TRFOn()) {
+ timeResponse = fPar->TimeResponse(time);
}
+ if (fPar->CTOn()) {
+ crossTalk = fPar->CrossTalk(time);
+ }
- // Loop over all electrons of this hit
- Int_t nEl = (Int_t) q;
- for (Int_t iEl = 0; iEl < nEl; iEl++) {
-
- // The driftlength
- Float_t driftlength = rot[0] - time0;
- if ((driftlength < 0) ||
- (driftlength > kDrThick)) break;
- Float_t driftlengthL = driftlength;
- if (fExBOn) driftlengthL /= TMath::Sqrt(fLorentzFactor);
- Float_t xyz[3];
- xyz[0] = rot[0];
- xyz[1] = rot[1];
- xyz[2] = rot[2];
-
- // Electron attachment
- if (fElAttachOn) {
- if (gRandom->Rndm() < (driftlengthL * fElAttachProp / 100.)) continue;
- }
+ signalOld[0] = 0.0;
+ signalOld[1] = 0.0;
+ signalOld[2] = 0.0;
+
+ for (iPad = 0; iPad < kNpad; iPad++) {
+
+ Int_t colPos = colE + iPad - 1;
+ if (colPos < 0) continue;
+ if (colPos >= nColMax) break;
+
+ // Add the signals
+ // Note: The time bin number is shifted by nTimeBefore to avoid negative
+ // time bins. This has to be subtracted later.
+ Int_t iCurrentTimeBin = iTimeBin + nTimeBefore;
+ signalOld[iPad] = signals->GetDataUnchecked(rowE,colPos,iCurrentTimeBin);
+ if( colPos != colE ) {
+ signalOld[iPad] += padSignal[iPad] * (timeResponse + crossTalk);
+ }
+ else {
+ signalOld[iPad] += padSignal[iPad] * timeResponse;
+ }
+ signals->SetDataUnchecked(rowE,colPos,iCurrentTimeBin,signalOld[iPad]);
+
+ // Store the track index in the dictionary
+ // Note: We store index+1 in order to allow the array to be compressed
+ if ((signalOld[iPad] > 0) && (!fSimpleSim)) {
+ for (iDict = 0; iDict < kNDict; iDict++) {
+ Int_t oldTrack = dictionary[iDict]->GetDataUnchecked(rowE
+ ,colPos
+ ,iCurrentTimeBin);
+ if (oldTrack == track+1) break;
+ if (oldTrack == 0) {
+ dictionary[iDict]->SetDataUnchecked(rowE,colPos,iCurrentTimeBin,track+1);
+ break;
+ }
+ }
+ }
- // Apply the diffusion smearing
- if (fDiffusionOn) {
- if (!(Diffusion(driftlengthL,xyz))) continue;
- }
+ } // Loop: pads
- // Apply E x B effects
- if (fExBOn) {
- if (!(ExB(driftlength,xyz))) continue;
- }
+ } // Loop: time bins
- // The electron position and the distance to the hit position
- // in pad units
- // The pad row (z-direction)
- Int_t rowE = (Int_t) ((xyz[2] - row0) / rowPadSize);
- Int_t rowD = rowH - rowE;
- // The pad column (rphi-direction)
- Int_t colE = (Int_t) ((xyz[1] - col0) / colPadSize);
- Int_t colD = colH - colE;
- // The time bucket
- Int_t timeE = (Int_t) ((xyz[0] - time0) / timeBinSize);
- Int_t timeD = timeH - timeE;
-
- // Apply the gas gain including fluctuations
- Int_t signal = (Int_t) (-fGasGain * TMath::Log(gRandom->Rndm()));
-
- // The distance of the electron to the center of the pad
- // in units of pad width
- Float_t dist = (xyz[1] - col0 - (colE + 0.5) * colPadSize)
- / colPadSize;
-
- // Sum up the signal in the different pixels
- // and apply the pad response
- Int_t rowIdx = rowD + (Int_t) ( kRowBox / 2);
- Int_t colIdx = colD + (Int_t) ( kColBox / 2);
- Int_t timeIdx = timeD + (Int_t) (kTimeBox / 2);
-
- if (( rowIdx < 0) || ( rowIdx > kRowBox)) {
- printf("AliTRDdigitizer::MakeDigits -- ");
- printf("Boundary error. rowIdx = %d (%d)\n", rowIdx, kRowBox);
- continue;
- }
- if (( colIdx < 0) || ( colIdx > kColBox)) {
- printf("AliTRDdigitizer::MakeDigits -- ");
- printf("Boundary error. colIdx = %d (%d)\n", colIdx, kColBox);
- continue;
+ } // Loop: electrons of a single hit
+
+ } // If: detector and test hit
+
+ hit = (AliTRDhit *) fTRD->NextHit();
+
+ } // Loop: hits of one primary track
+
+ } // Loop: primary tracks
+
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Finished analyzing %d hits\n",countHits);
+ }
+
+ // The coupling factor
+ Float_t coupling = fPar->GetPadCoupling()
+ * fPar->GetTimeCoupling();
+
+ // The conversion factor
+ Float_t convert = kEl2fC
+ * fPar->GetChipGain();
+
+ // Loop through all chambers to finalize the digits
+ Int_t iDetBeg = 0;
+ Int_t iDetEnd = AliTRDgeometry::Ndet();
+ if (fSimpleSim) {
+ iDetBeg = fSimpleDet;
+ iDetEnd = iDetBeg + 1;
+ }
+ for (Int_t iDet = iDetBeg; iDet < iDetEnd; iDet++) {
+
+ Int_t plane = fGeo->GetPlane(iDet);
+ Int_t sector = fGeo->GetSector(iDet);
+ Int_t chamber = fGeo->GetChamber(iDet);
+ Int_t nRowMax = fPar->GetRowMax(plane,chamber,sector);
+ Int_t nColMax = fPar->GetColMax(plane);
+ Int_t nTimeMax = fPar->GetTimeMax();
+ Int_t nTimeTotal = fPar->GetTimeTotal();
+
+ Double_t *inADC = new Double_t[nTimeTotal];
+ Double_t *outADC = new Double_t[nTimeTotal];
+
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Digitization for chamber %d\n",iDet);
+ }
+
+ // Add a container for the digits of this detector
+ digits = fDigitsManager->GetDigits(iDet);
+ // Allocate memory space for the digits buffer
+ if (digits->GetNtime() == 0) {
+ digits->Allocate(nRowMax,nColMax,nTimeTotal);
+ }
+ else if (fSimpleSim) {
+ digits->Clear();
+ }
+
+ // Get the signal container
+ signals = (AliTRDdataArrayF *) signalsArray->At(iDet);
+ if (signals->GetNtime() == 0) {
+ // Create missing containers
+ signals->Allocate(nRowMax,nColMax,nTimeTotal);
+ }
+ else {
+ // Expand the container if neccessary
+ if (fCompress) signals->Expand();
+ }
+ // Create the missing dictionary containers
+ if (!fSimpleSim) {
+ for (iDict = 0; iDict < kNDict; iDict++) {
+ dictionary[iDict] = fDigitsManager->GetDictionary(iDet,iDict);
+ if (dictionary[iDict]->GetNtime() == 0) {
+ dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
+ }
+ }
+ }
+
+ Int_t nDigits = 0;
+
+ // Don't create noise in detectors that are switched off
+ if (CheckDetector(plane,chamber,sector)) {
+
+ // Create the digits for this chamber
+ for (iRow = 0; iRow < nRowMax; iRow++ ) {
+ for (iCol = 0; iCol < nColMax; iCol++ ) {
+
+ // Create summable digits
+ if (fSDigits) {
+
+ for (iTime = 0; iTime < nTimeTotal; iTime++) {
+ Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime);
+ signalAmp *= fSDigitsScale;
+ signalAmp = TMath::Min(signalAmp,(Float_t) 1.0e9);
+ Int_t adc = (Int_t) signalAmp;
+ if (adc > 0) nDigits++;
+ digits->SetDataUnchecked(iRow,iCol,iTime,adc);
+ }
+
+ }
+ // Create normal digits
+ else {
+
+ for (iTime = 0; iTime < nTimeTotal; iTime++) {
+ Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime);
+ // Pad and time coupling
+ signalAmp *= coupling;
+ // Add the noise, starting from minus ADC baseline in electrons
+ Double_t baselineEl = fPar->GetADCbaseline() * (fPar->GetADCinRange()
+ / fPar->GetADCoutRange())
+ / convert;
+ signalAmp = TMath::Max((Double_t) gRandom->Gaus(signalAmp,fPar->GetNoise())
+ ,-baselineEl);
+ // Convert to mV
+ signalAmp *= convert;
+ // Add ADC baseline in mV
+ signalAmp += fPar->GetADCbaseline() * (fPar->GetADCinRange()
+ / fPar->GetADCoutRange());
+ // Convert to ADC counts. Set the overflow-bit fADCoutRange if the
+ // signal is larger than fADCinRange
+ Int_t adc = 0;
+ if (signalAmp >= fPar->GetADCinRange()) {
+ adc = ((Int_t) fPar->GetADCoutRange());
}
- if ((timeIdx < 0) || (timeIdx > kTimeBox)) {
- printf("AliTRDdigitizer::MakeDigits -- ");
- printf("Boundary error. timeIdx = %d (%d)\n",timeIdx,kTimeBox);
- continue;
+ else {
+ adc = ((Int_t) (signalAmp * (fPar->GetADCoutRange()
+ / fPar->GetADCinRange())));
}
- signalSum[rowIdx][colIdx-1][timeIdx] += fPRF->Eval(dist-1.0,0,0) * signal;
- signalSum[rowIdx][colIdx ][timeIdx] += fPRF->Eval(dist ,0,0) * signal;
- signalSum[rowIdx][colIdx+1][timeIdx] += fPRF->Eval(dist+1.0,0,0) * signal;
+ inADC[iTime] = adc;
+ outADC[iTime] = adc;
+ }
- }
+ // Apply the tail cancelation via the digital filter
+ if (fPar->TCOn()) {
+ DeConvExp(inADC,outADC,nTimeTotal,fPar->GetTCnexp());
+ }
- // Add the padcluster to the detector matrix
- for (iRow = 0; iRow < kRowBox; iRow++ ) {
- for (iCol = 0; iCol < kColBox; iCol++ ) {
- for (iTime = 0; iTime < kTimeBox; iTime++) {
-
- Int_t rowB = rowH + iRow - (Int_t) ( kRowBox / 2);
- Int_t colB = colH + iCol - (Int_t) ( kColBox / 2);
- Int_t timeB = timeH + iTime - (Int_t) (kTimeBox / 2);
- Float_t signalB = signalSum[iRow][iCol][iTime];
- if (( rowB < 0) || ( rowB >= nRowMax)) continue;
- if (( colB < 0) || ( colB >= nColMax)) continue;
- if ((timeB < 0) || (timeB >= nTimeMax)) continue;
- if (signalB > 0.0) {
-
- // Add the signal sum
- signalB += signal->GetData(rowB,colB,timeB);
- signal->SetData(rowB,colB,timeB,signalB);
- // Store the track index in the dictionary
- // Note: We store index+1 in order to allow the array to be compressed
- for (iDict = 0; iDict < kNDict; iDict++) {
- Int_t oldTrack = tracks[iDict]->GetData(rowB,colB,timeB);
- if (oldTrack == track+1) break;
- if (oldTrack == -1) break;
- if (oldTrack == 0) {
- tracks[iDict]->SetData(rowB,colB,timeB,track+1);
- break;
- }
- }
- if (iDict == kNDict) {
- printf("AliTRDdigitizer::MakeDigits -- ");
- printf("More than three tracks for one digit!\n");
- }
- }
-
- }
- }
+ for (iTime = 0; iTime < nTimeTotal; iTime++) {
+ // Store the amplitude of the digit if above threshold
+ if (outADC[iTime] > fPar->GetADCthreshold()) {
+ if (fDebug > 2) {
+ printf(" iRow = %d, iCol = %d, iTime = %d, adc = %f\n"
+ ,iRow,iCol,iTime,outADC[iTime]);
+ }
+ nDigits++;
+ digits->SetDataUnchecked(iRow,iCol,iTime,((Int_t) outADC[iTime]));
+ }
}
- }
+ }
- }
+ }
+ }
- // Add a container for the digits of this detector
- digits = fDigits->GetDigits(iDet);
- // Allocate memory space for the digits buffer
- digits->Allocate(nRowMax,nColMax,nTimeMax);
+ }
- // Do the same for the dictionary arrays
- for (iDict = 0; iDict < kNDict; iDict++) {
- dictionary[iDict] = fDigits->GetDictionary(iDet,iDict);
- dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeMax);
- }
+ // Compress the arrays
+ if (!fSimpleSim) {
+ digits->Compress(1,0);
+ for (iDict = 0; iDict < kNDict; iDict++) {
+ dictionary[iDict]->Compress(1,0);
+ }
- // Create the digits for this chamber
- for (iRow = 0; iRow < nRowMax; iRow++ ) {
- for (iCol = 0; iCol < nColMax; iCol++ ) {
- for (iTime = 0; iTime < nTimeMax; iTime++) {
+ totalSizeDigits += digits->GetSize();
+ totalSizeDict0 += dictionary[0]->GetSize();
+ totalSizeDict1 += dictionary[1]->GetSize();
+ totalSizeDict2 += dictionary[2]->GetSize();
- Float_t signalAmp = signal->GetData(iRow,iCol,iTime);
+ Float_t nPixel = nRowMax * nColMax * nTimeMax;
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Found %d digits in detector %d (%3.0f).\n"
+ ,nDigits,iDet
+ ,100.0 * ((Float_t) nDigits) / nPixel);
+ }
- // Add the noise
- signalAmp = TMath::Max((Float_t) gRandom->Gaus(signalAmp,fNoise)
- ,(Float_t) 0.0);
- // Convert to fC
- signalAmp *= kEl2fC;
- // Convert to mV
- signalAmp *= fChipGain;
- // Convert to ADC counts
- Int_t adc = (Int_t) (signalAmp * (fADCoutRange / fADCinRange));
+ if (fCompress) signals->Compress(1,0);
- if (adc > fADCthreshold) {
+ }
- nDigits++;
+ delete [] inADC;
+ delete [] outADC;
- // Store the amplitude of the digit
- digits->SetData(iRow,iCol,iTime,adc);
+ }
- // Store the track index in the dictionary
- // Note: We store index+1 in order to allow the array to be compressed
- for (iDict = 0; iDict < kNDict; iDict++) {
- dictionary[iDict]->SetData(iRow,iCol,iTime
- ,tracks[iDict]->GetData(iRow,iCol,iTime));
- }
+ if (signalsArray) {
+ delete signalsArray;
+ signalsArray = 0;
+ }
- }
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Total number of analyzed hits = %d\n",countHits);
+ if (!fSimpleSim) {
+ printf("<AliTRDdigitizer::MakeDigits> ");
+ printf("Total digits data size = %d, %d, %d, %d\n",totalSizeDigits
+ ,totalSizeDict0
+ ,totalSizeDict1
+ ,totalSizeDict2);
+ }
+ }
- }
+ return kTRUE;
+
+}
+
+//_____________________________________________________________________________
+void AliTRDdigitizer::AddSDigitsManager(AliTRDdigitsManager *man)
+{
+ //
+ // Add a digits manager for s-digits to the input list.
+ //
+
+ fSDigitsManagerList->Add(man);
+
+}
+
+//_____________________________________________________________________________
+void AliTRDdigitizer::DeleteSDigitsManager()
+{
+ //
+ // Removes digits manager from the input list.
+ //
+
+ fSDigitsManagerList->Delete();
+
+}
+
+//_____________________________________________________________________________
+Bool_t AliTRDdigitizer::ConvertSDigits()
+{
+ //
+ // Converts s-digits to normal digits
+ //
+
+ // Number of track dictionary arrays
+ const Int_t kNDict = AliTRDdigitsManager::kNDict;
+
+ // Converts number of electrons to fC
+ const Double_t kEl2fC = 1.602E-19 * 1.0E15;
+
+ Int_t iDict = 0;
+ Int_t iRow;
+ Int_t iCol;
+ Int_t iTime;
+
+ if (!fPar) {
+ fPar = new AliTRDparameter("TRDparameter","Standard parameter");
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::ConvertSDigits> ");
+ printf("Create the default parameter object\n");
+ }
+ }
+
+ Double_t sDigitsScale = 1.0 / GetSDigitsScale();
+ Double_t noise = fPar->GetNoise();
+ Double_t padCoupling = fPar->GetPadCoupling();
+ Double_t timeCoupling = fPar->GetTimeCoupling();
+ Double_t chipGain = fPar->GetChipGain();
+ Double_t coupling = padCoupling * timeCoupling;
+ Double_t convert = kEl2fC * chipGain;
+ Double_t adcInRange = fPar->GetADCinRange();
+ Double_t adcOutRange = fPar->GetADCoutRange();
+ Int_t adcThreshold = fPar->GetADCthreshold();
+ Int_t adcBaseline = fPar->GetADCbaseline();
+
+ AliTRDdataArrayI *digitsIn;
+ AliTRDdataArrayI *digitsOut;
+ AliTRDdataArrayI *dictionaryIn[kNDict];
+ AliTRDdataArrayI *dictionaryOut[kNDict];
+
+ // Loop through the detectors
+ for (Int_t iDet = 0; iDet < AliTRDgeometry::Ndet(); iDet++) {
+
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::ConvertSDigits> ");
+ printf("Convert detector %d to digits.\n",iDet);
+ }
+
+ Int_t plane = fGeo->GetPlane(iDet);
+ Int_t sector = fGeo->GetSector(iDet);
+ Int_t chamber = fGeo->GetChamber(iDet);
+ Int_t nRowMax = fPar->GetRowMax(plane,chamber,sector);
+ Int_t nColMax = fPar->GetColMax(plane);
+ Int_t nTimeTotal = fPar->GetTimeTotal();
+
+ Double_t *inADC = new Double_t[nTimeTotal];
+ Double_t *outADC = new Double_t[nTimeTotal];
+
+ digitsIn = fSDigitsManager->GetDigits(iDet);
+ digitsIn->Expand();
+ digitsOut = fDigitsManager->GetDigits(iDet);
+ digitsOut->Allocate(nRowMax,nColMax,nTimeTotal);
+ for (iDict = 0; iDict < kNDict; iDict++) {
+ dictionaryIn[iDict] = fSDigitsManager->GetDictionary(iDet,iDict);
+ dictionaryIn[iDict]->Expand();
+ dictionaryOut[iDict] = fDigitsManager->GetDictionary(iDet,iDict);
+ dictionaryOut[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
+ }
+
+ for (iRow = 0; iRow < nRowMax; iRow++ ) {
+ for (iCol = 0; iCol < nColMax; iCol++ ) {
+
+ for (iTime = 0; iTime < nTimeTotal; iTime++) {
+ Double_t signal = (Double_t) digitsIn->GetDataUnchecked(iRow,iCol,iTime);
+ signal *= sDigitsScale;
+ // Pad and time coupling
+ signal *= coupling;
+ // Add the noise, starting from minus ADC baseline in electrons
+ Double_t baselineEl = adcBaseline * (adcInRange / adcOutRange) / convert;
+ signal = TMath::Max((Double_t) gRandom->Gaus(signal,noise),-baselineEl);
+ // Convert to mV
+ signal *= convert;
+ // add ADC baseline in mV
+ signal += adcBaseline * (adcInRange / adcOutRange);
+ // Convert to ADC counts. Set the overflow-bit adcOutRange if the
+ // signal is larger than adcInRange
+ Int_t adc = 0;
+ if (signal >= adcInRange) {
+ adc = ((Int_t) adcOutRange);
+ }
+ else {
+ adc = ((Int_t) (signal * (adcOutRange / adcInRange)));
}
+ inADC[iTime] = adc;
+ outADC[iTime] = adc;
}
- // Compress the arrays
- digits->Compress(1,0);
- for (iDict = 0; iDict < kNDict; iDict++) {
- dictionary[iDict]->Compress(1,0);
+ // Apply the tail cancelation via the digital filter
+ if (fPar->TCOn()) {
+ DeConvExp(inADC,outADC,nTimeTotal,fPar->GetTCnexp());
}
- totalSizeDigits += digits->GetSize();
- totalSizeDict0 += dictionary[0]->GetSize();
- totalSizeDict1 += dictionary[1]->GetSize();
- totalSizeDict2 += dictionary[2]->GetSize();
-
- printf("AliTRDdigitizer::MakeDigits -- ");
- printf("Number of digits found: %d.\n",nDigits);
-
- // Reset the arrays
- signal->Reset();
- for (iDict = 0; iDict < kNDict; iDict++) {
- tracks[iDict]->Reset();
+ for (iTime = 0; iTime < nTimeTotal; iTime++) {
+ // Store the amplitude of the digit if above threshold
+ if (outADC[iTime] > adcThreshold) {
+ digitsOut->SetDataUnchecked(iRow,iCol,iTime,((Int_t) outADC[iTime]));
+ // Copy the dictionary
+ for (iDict = 0; iDict < kNDict; iDict++) {
+ Int_t track = dictionaryIn[iDict]->GetDataUnchecked(iRow,iCol,iTime);
+ dictionaryOut[iDict]->SetDataUnchecked(iRow,iCol,iTime,track);
+ }
+ }
}
}
}
+
+ if (fCompress) {
+ digitsIn->Compress(1,0);
+ digitsOut->Compress(1,0);
+ for (iDict = 0; iDict < kNDict; iDict++) {
+ dictionaryIn[iDict]->Compress(1,0);
+ dictionaryOut[iDict]->Compress(1,0);
+ }
+ }
+
+ delete [] inADC;
+ delete [] outADC;
+
+ }
+
+ return kTRUE;
+
+}
+
+//_____________________________________________________________________________
+Bool_t AliTRDdigitizer::MergeSDigits()
+{
+ //
+ // Merges the input s-digits:
+ // - The amplitude of the different inputs are summed up.
+ // - Of the track IDs from the input dictionaries only one is
+ // kept for each input. This works for maximal 3 different merged inputs.
+ //
+
+ // Number of track dictionary arrays
+ const Int_t kNDict = AliTRDdigitsManager::kNDict;
+
+ if (!fPar) {
+ fPar = new AliTRDparameter("TRDparameter","Standard parameter");
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::MergeSDigits> ");
+ printf("Create the default parameter object\n");
+ }
}
- printf("AliTRDdigitizer::MakeDigits -- ");
- printf("Total number of analyzed hits = %d\n",countHits);
+ Int_t iDict = 0;
+ Int_t jDict = 0;
- printf("AliTRDdigitizer::MakeDigits -- ");
- printf("Total digits data size = %d, %d, %d, %d\n",totalSizeDigits
- ,totalSizeDict0
- ,totalSizeDict1
- ,totalSizeDict2);
+ AliTRDdataArrayI *digitsA;
+ AliTRDdataArrayI *digitsB;
+ AliTRDdataArrayI *dictionaryA[kNDict];
+ AliTRDdataArrayI *dictionaryB[kNDict];
+
+ // Get the first s-digits
+ fSDigitsManager = (AliTRDdigitsManager *) fSDigitsManagerList->First();
+ if (!fSDigitsManager) return kFALSE;
+
+ // Loop through the other sets of s-digits
+ AliTRDdigitsManager *mergeSDigitsManager;
+ mergeSDigitsManager = (AliTRDdigitsManager *)
+ fSDigitsManagerList->After(fSDigitsManager);
+
+ if (fDebug > 0) {
+ if (mergeSDigitsManager) {
+ printf("<AliTRDdigitizer::MergeSDigits> ");
+ printf("Merge %d input files.\n",fSDigitsManagerList->GetSize());
+ }
+ else {
+ printf("<AliTRDdigitizer::MergeSDigits> ");
+ printf("Only one input file.\n");
+ }
+ }
+
+ Int_t iMerge = 0;
+ while (mergeSDigitsManager) {
+
+ iMerge++;
+
+ // Loop through the detectors
+ for (Int_t iDet = 0; iDet < AliTRDgeometry::Ndet(); iDet++) {
+
+ Int_t plane = fGeo->GetPlane(iDet);
+ Int_t sector = fGeo->GetSector(iDet);
+ Int_t chamber = fGeo->GetChamber(iDet);
+ Int_t nRowMax = fPar->GetRowMax(plane,chamber,sector);
+ Int_t nColMax = fPar->GetColMax(plane);
+ Int_t nTimeTotal = fPar->GetTimeTotal();
+
+ // Loop through the pixels of one detector and add the signals
+ digitsA = fSDigitsManager->GetDigits(iDet);
+ digitsB = mergeSDigitsManager->GetDigits(iDet);
+ digitsA->Expand();
+ digitsB->Expand();
+ for (iDict = 0; iDict < kNDict; iDict++) {
+ dictionaryA[iDict] = fSDigitsManager->GetDictionary(iDet,iDict);
+ dictionaryB[iDict] = mergeSDigitsManager->GetDictionary(iDet,iDict);
+ dictionaryA[iDict]->Expand();
+ dictionaryB[iDict]->Expand();
+ }
+
+ // Merge only detectors that contain a signal
+ Bool_t doMerge = kTRUE;
+ if (fMergeSignalOnly) {
+ if (digitsA->GetOverThreshold(0) == 0) {
+ doMerge = kFALSE;
+ }
+ }
+
+ if (doMerge) {
+
+ if (fDebug > 0) {
+ printf("<AliTRDdigitizer::MergeSDigits> ");
+ printf("Merge detector %d of input no.%d\n",iDet,iMerge+1);
+ }
+
+ for (Int_t iRow = 0; iRow < nRowMax; iRow++ ) {
+ for (Int_t iCol = 0; iCol < nColMax; iCol++ ) {
+ for (Int_t iTime = 0; iTime < nTimeTotal; iTime++) {
+
+ // Add the amplitudes of the summable digits
+ Int_t ampA = digitsA->GetDataUnchecked(iRow,iCol,iTime);
+ Int_t ampB = digitsB->GetDataUnchecked(iRow,iCol,iTime);
+ ampA += ampB;
+ digitsA->SetDataUnchecked(iRow,iCol,iTime,ampA);
+
+ // Add the mask to the track id if defined.
+ for (iDict = 0; iDict < kNDict; iDict++) {
+ Int_t trackB = dictionaryB[iDict]->GetDataUnchecked(iRow,iCol,iTime);
+ if ((fMasks) && (trackB > 0)) {
+ for (jDict = 0; jDict < kNDict; jDict++) {
+ Int_t trackA = dictionaryA[iDict]->GetDataUnchecked(iRow,iCol,iTime);
+ if (trackA == 0) {
+ trackA = trackB + fMasks[iMerge];
+ dictionaryA[iDict]->SetDataUnchecked(iRow,iCol,iTime,trackA);
+ }
+ }
+ }
+ }
+
+ }
+ }
+ }
+
+ }
+
+ if (fCompress) {
+ digitsA->Compress(1,0);
+ digitsB->Compress(1,0);
+ for (iDict = 0; iDict < kNDict; iDict++) {
+ dictionaryA[iDict]->Compress(1,0);
+ dictionaryB[iDict]->Compress(1,0);
+ }
+ }
+
+ }
+
+ // The next set of s-digits
+ mergeSDigitsManager = (AliTRDdigitsManager *)
+ fSDigitsManagerList->After(mergeSDigitsManager);
+
+ }
return kTRUE;
}
//_____________________________________________________________________________
-Bool_t AliTRDdigitizer::WriteDigits()
+Bool_t AliTRDdigitizer::SDigits2Digits()
{
//
- // Writes out the TRD-digits and the dictionaries
+ // Merges the input s-digits and converts them to normal digits
+ //
+
+ if (!MergeSDigits()) return kFALSE;
+
+ return ConvertSDigits();
+
+}
+
+//_____________________________________________________________________________
+Bool_t AliTRDdigitizer::CheckDetector(Int_t plane, Int_t chamber, Int_t sector)
+{
+ //
+ // Checks whether a detector is enabled
//
- // Create the branches
- if (!(gAlice->TreeD()->GetBranch("TRDdigits"))) {
- if (!fDigits->MakeBranch()) return kFALSE;
+ if (fSimpleSim) return kTRUE;
+
+ if ((fTRD->GetSensChamber() >= 0) &&
+ (fTRD->GetSensChamber() != chamber)) return kFALSE;
+ if ((fTRD->GetSensPlane() >= 0) &&
+ (fTRD->GetSensPlane() != plane)) return kFALSE;
+ if ( fTRD->GetSensSector() >= 0) {
+ Int_t sens1 = fTRD->GetSensSector();
+ Int_t sens2 = sens1 + fTRD->GetSensSectorRange();
+ sens2 -= ((Int_t) (sens2 / AliTRDgeometry::Nsect()))
+ * AliTRDgeometry::Nsect();
+ if (sens1 < sens2) {
+ if ((sector < sens1) || (sector >= sens2)) return kFALSE;
+ }
+ else {
+ if ((sector < sens1) && (sector >= sens2)) return kFALSE;
+ }
}
- // Store the digits and the dictionary in the tree
- fDigits->WriteDigits();
-
- // Write the new tree into the input file (use overwrite option)
- Char_t treeName[7];
- sprintf(treeName,"TreeD%d",fEvent);
- printf("AliTRDdigitizer::WriteDigits -- ");
- printf("Write the digits tree %s for event %d.\n"
- ,treeName,fEvent);
- gAlice->TreeD()->Write(treeName,2);
-
return kTRUE;
}
+
+//_____________________________________________________________________________
+Bool_t AliTRDdigitizer::WriteDigits() const
+{
+ //
+ // Writes out the TRD-digits and the dictionaries
+ //
+
+ // Store the digits and the dictionary in the tree
+ return fDigitsManager->WriteDigits();
+
+}
+
+//_____________________________________________________________________________
+void AliTRDdigitizer::DeConvExp(Double_t *source, Double_t *target
+ , Int_t n, Int_t nexp)
+{
+ //
+ // Does the deconvolution by the digital filter.
+ //
+ // Author: Marcus Gutfleisch, KIP Heidelberg
+ // Optimized for: New TRF from Venelin Angelov, simulated with CADENCE
+ // Pad-ground capacitance = 25 pF
+ // Pad-pad cross talk capacitance = 6 pF
+ // For 10 MHz digitization, corresponding to 20 time bins
+ // in the drift region
+ //
+
+ Double_t rates[2];
+ Double_t coefficients[2];
+
+ /* initialize (coefficient = alpha, rates = lambda) */
+
+ if( nexp == 1 ) {
+ rates[0] = 0.466998;
+ /* no rescaling */
+ coefficients[0] = 1.0;
+ }
+ if( nexp == 2 ) {
+ rates[0] = 0.8988162;
+ coefficients[0] = 0.11392069;
+ rates[1] = 0.3745688;
+ coefficients[1] = 0.8860793;
+ /* no rescaling */
+ Float_t sumc = coefficients[0]+coefficients[1];
+ coefficients[0] /= sumc;
+ coefficients[1] /= sumc;
+ }
+
+ Int_t i, k;
+ Double_t reminder[2];
+ Double_t correction, result;
+
+ /* attention: computation order is important */
+ correction=0.0;
+ for ( k = 0; k < nexp; k++ ) reminder[k]=0.0;
+
+ for ( i = 0; i < n; i++ ) {
+ result = ( source[i] - correction ); /* no rescaling */
+ target[i] = result;
+
+ for ( k = 0; k < nexp; k++ ) reminder[k] = rates[k]
+ * ( reminder[k] + coefficients[k] * result);
+
+ correction=0.0;
+ for ( k = 0; k < nexp; k++ ) correction += reminder[k];
+ }
+
+}
+
+//_____________________________________________________________________________
+void AliTRDdigitizer::InitOutput(Int_t iEvent)
+{
+ //
+ // Initializes the output branches
+ //
+
+ fEvent = iEvent;
+
+ if (!fRunLoader)
+ {
+ Error("InitOutput","Run Loader is NULL");
+ return;
+ }
+ AliLoader* loader = fRunLoader->GetLoader("TRDLoader");
+ if (!loader)
+ {
+ Error("Open","Can not get TRD loader from Run Loader");
+ return;
+ }
+
+ TTree* tree = 0;
+
+ if (fSDigits)
+ {
+ //if we produce SDigits
+ tree = loader->TreeS();
+ if (!tree)
+ {
+ loader->MakeTree("S");
+ tree = loader->TreeS();
+ }
+ }
+ else
+ {//if we produce Digits
+ tree = loader->TreeD();
+ if (!tree)
+ {
+ loader->MakeTree("D");
+ tree = loader->TreeD();
+ }
+ }
+ fDigitsManager->SetEvent(iEvent);
+ fDigitsManager->MakeBranch(tree);
+
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff