1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 This class provides the calibration of the time dependence of the TPC gain due to pressure and temperature changes etc.
21 //0. Libraries to load
22 gSystem->Load("libANALYSIS");
23 gSystem->Load("libSTAT");
24 gSystem->Load("libTPCcalib");
27 //1. Do calibration ...
32 //2. Visualize results
34 TFile fcalib("CalibObjects.root");
35 TObjArray * array = (TObjArray*)fcalib.Get("TPCCalib");
36 AliTPCcalibTimeGain * gain = ( AliTPCcalibTimeGain *)array->FindObject("calibTimeGain");
37 TGraphErrors * gr = gain->GetGraphGainVsTime(0,1000)
39 // gain->GetHistGainTime()->GetAxis(1)->SetRangeUser(1213.8e6,1214.3e6)
40 TH2D * GainTime = gain->GetHistGainTime()->Projection(0,1)
41 GainTime->GetXaxis()->SetTimeDisplay(kTRUE)
42 GainTime->GetXaxis()->SetTimeFormat("#splitline{%d/%m}{%H:%M}")
43 GainTime->Draw("colz")
46 // MakeSlineFit example
48 AliSplineFit *fit = AliTPCcalibTimeGain::MakeSplineFit(gr)
50 TGraph * grfit = fit.MakeGraph(gr->GetX()[0],gr->GetX()[gr->GetN()-1],50000,0);
52 gr->SetMarkerStyle(25);
54 grfit->SetLineColor(2);
58 // QA - dE/dx resoultion as a function of time
61 TGraph * grSigma = AliTPCcalibBase::FitSlicesSigma(gain->GetHistGainTime(),0,1,1800,5)
63 TCanvas *c1 = new TCanvas("c1","transparent pad",200,10,700,500);
64 TPad *pad1 = new TPad("pad1","",0,0,1,1);
65 TPad *pad2 = new TPad("pad2","",0,0,1,1);
66 pad2->SetFillStyle(4000); //will be transparent
70 GainTime->Draw("colz")
76 Double_t ymin = -0.04;
78 Double_t dy = (ymax-ymin)/0.8;
79 Double_t xmin = GainTime->GetXaxis()->GetXmin()
80 Double_t xmax = GainTime->GetXaxis()->GetXmax()
81 Double_t dx = (xmax-xmin)/0.8; //10 per cent margins left and right
82 pad2->Range(xmin-0.1*dx,ymin-0.1*dy,xmax+0.1*dx,ymax+0.1*dy);
85 grSigma->SetLineColor(2);
86 grSigma->SetLineWidth(2);
88 TGaxis *axis = new TGaxis(xmax,ymin,xmax,ymax,ymin,ymax,50510,"+L");
89 axis->SetLabelColor(kRed);
90 axis->SetTitle("dE/dx resolution #sigma_{dE/dx}");
93 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
95 ----> make Attachment study
97 TFile fcalib("CalibObjects40366b.root");
98 TObjArray * array = (TObjArray*)fcalib.Get("TPCCalib");
99 AliTPCcalibTimeGain * gain = ( AliTPCcalibTimeGain *)array->FindObject("calibTimeGain");
100 TGraphErrors * grAttach = gain->GetGraphAttachment(2000,4)
102 TCanvas *c1 = new TCanvas("c1","transparent pad",200,10,700,500);
103 TPad *pad1 = new TPad("pad1","",0,0,1,1);
104 TPad *pad2 = new TPad("pad2","",0,0,1,1);
105 pad2->SetFillStyle(4000); //will be transparent
109 gain->GetHistGainTime()->GetAxis(1)->SetRangeUser(1213.8e6,1214.3e6)
110 TH2D * GainTime = gain->GetHistGainTime()->Projection(0,1)
111 GainTime->GetXaxis()->SetTimeDisplay(kTRUE)
112 GainTime->GetXaxis()->SetTimeFormat("#splitline{%d/%m}{%H:%M}")
113 GainTime->Draw("colz")
117 Double_t ymin = -0.001;
118 Double_t ymax = 0.001;
119 Double_t dy = (ymax-ymin)/0.8;
120 Double_t xmin = GainTime->GetXaxis()->GetXmin()
121 Double_t xmax = GainTime->GetXaxis()->GetXmax()
122 Double_t dx = (xmax-xmin)/0.8; //10 per cent margins left and right
123 pad2->Range(xmin-0.1*dx,ymin-0.1*dy,xmax+0.1*dx,ymax+0.1*dy);
126 grAttach->SetLineColor(2);
127 grAttach->SetLineWidth(2);
129 TGaxis *axis = new TGaxis(xmax,ymin,xmax,ymax,ymin,ymax,50510,"+L");
130 axis->SetLabelColor(kRed);
131 axis->SetTitle("attachment coefficient b");
138 #include "Riostream.h"
144 #include "THnSparse.h"
145 #include "TGraphErrors.h"
151 #include "TVectorD.h"
152 #include "TProfile.h"
153 #include "TGraphErrors.h"
156 #include "AliTPCclusterMI.h"
157 #include "AliTPCseed.h"
158 #include "AliESDVertex.h"
159 #include "AliESDEvent.h"
160 #include "AliESDfriend.h"
161 #include "AliESDInputHandler.h"
162 #include "AliAnalysisManager.h"
164 #include "AliTracker.h"
166 #include "AliTPCCalROC.h"
170 #include "AliTPCcalibTimeGain.h"
172 #include "TTreeStream.h"
173 #include "AliTPCTracklet.h"
174 #include "TTimeStamp.h"
175 #include "AliTPCcalibDB.h"
176 #include "AliTPCcalibLaser.h"
177 #include "AliDCSSensorArray.h"
178 #include "AliDCSSensor.h"
180 ClassImp(AliTPCcalibTimeGain)
183 AliTPCcalibTimeGain::AliTPCcalibTimeGain()
188 fIntegrationTimeDeDx(0),
196 fUseCookAnalytical(0),
198 fLowMemoryConsumption(0)
201 // Default constructor
203 AliInfo("Default Constructor");
207 AliTPCcalibTimeGain::AliTPCcalibTimeGain(const Text_t *name, const Text_t *title, UInt_t StartTime, UInt_t EndTime, Int_t deltaIntegrationTimeGain)
212 fIntegrationTimeDeDx(0),
220 fUseCookAnalytical(0),
222 fLowMemoryConsumption(0)
225 // No default constructor
230 AliInfo("Non Default Constructor");
232 fIntegrationTimeDeDx = deltaIntegrationTimeGain;
234 Double_t deltaTime = EndTime - StartTime;
237 // main histogram for time dependence: dE/dx, time, type (1-muon cosmic,2-pion beam data), meanDriftlength, momenta (only filled if enough space is available), run number
238 Int_t timeBins = TMath::Nint(deltaTime/deltaIntegrationTimeGain);
239 Int_t binsGainTime[6] = {150, timeBins, 2, 25, 200, 10000000};
240 Double_t xminGainTime[6] = {0.5, StartTime, 0.5, 0, 0.1, -0.5};
241 Double_t xmaxGainTime[6] = { 8, EndTime, 2.5, 250, 50, 9999999.5};
242 fHistGainTime = new THnSparseF("HistGainTime","dEdx time dep.;dEdx,time,type,driftlength,momenta,run number;dEdx",6,binsGainTime,xminGainTime,xmaxGainTime);
243 BinLogX(fHistGainTime, 4);
245 fHistDeDxTotal = new TH2F("DeDx","dEdx; momentum p (GeV); TPC signal (a.u.)",250,0.01,100.,1000,0.,8);
246 BinLogX(fHistDeDxTotal);
248 // default values for dE/dx
253 fUseShapeNorm = kTRUE;
254 fUsePosNorm = kFALSE;
255 fUsePadNorm = kFALSE;
256 fUseCookAnalytical = kFALSE;
259 fLowMemoryConsumption = kTRUE;
266 AliTPCcalibTimeGain::~AliTPCcalibTimeGain(){
270 delete fHistGainTime;
272 delete fHistDeDxTotal;
276 void AliTPCcalibTimeGain::Process(AliESDEvent *event) {
281 Printf("ERROR: ESD not available");
285 if (fIsCosmic) { // this should be removed at some point based on trigger mask !?
286 ProcessCosmicEvent(event);
288 ProcessBeamEvent(event);
297 void AliTPCcalibTimeGain::ProcessCosmicEvent(AliESDEvent *event) {
299 // Process in case of cosmic event
301 AliESDfriend *esdFriend=static_cast<AliESDfriend*>(event->FindListObject("AliESDfriend"));
303 Printf("ERROR: ESDfriend not available");
307 UInt_t time = event->GetTimeStamp();
308 Int_t ntracks = event->GetNumberOfTracks();
309 Int_t runNumber = event->GetRunNumber();
313 for (Int_t i=0;i<ntracks;++i) {
315 AliESDtrack *track = event->GetTrack(i);
316 if (!track) continue;
317 AliESDfriendTrack *friendTrack = esdFriend->GetTrack(i);
318 if (!friendTrack) continue;
319 const AliExternalTrackParam * trackIn = track->GetInnerParam();
320 const AliExternalTrackParam * trackOut = friendTrack->GetTPCOut();
321 if (!trackIn) continue;
322 if (!trackOut) continue;
324 // calculate necessary track parameters
325 Double_t meanP = trackIn->GetP();
326 Double_t meanDrift = 250 - 0.5*TMath::Abs(trackIn->GetZ() + trackOut->GetZ());
327 Int_t nclsDeDx = track->GetTPCNcls();
329 // exclude tracks which do not look like primaries or are simply too short or on wrong sectors
330 if (nclsDeDx < 60) continue;
331 if (TMath::Abs(trackIn->GetTgl()) > 1) continue;
332 if (TMath::Abs(trackIn->GetSnp()) > 0.6) continue;
335 TObject *calibObject;
336 AliTPCseed *seed = 0;
337 for (Int_t l=0;(calibObject=friendTrack->GetCalibObject(l));++l) {
338 if ((seed=dynamic_cast<AliTPCseed*>(calibObject))) break;
342 Double_t tpcSignal = GetTPCdEdx(seed);
343 if (nclsDeDx > 100) fHistDeDxTotal->Fill(meanP, tpcSignal);
345 if (fLowMemoryConsumption) {
346 if (meanP < 20) continue;
347 meanP = 30; // set all momenta to one in order to save memory
349 //dE/dx, time, type (1-muon cosmic,2-pion beam data), momenta
350 Double_t vec[6] = {tpcSignal,time,1,meanDrift,meanP,runNumber};
351 fHistGainTime->Fill(vec);
360 void AliTPCcalibTimeGain::ProcessBeamEvent(AliESDEvent *event) {
362 // Process in case of beam event
364 AliESDfriend *esdFriend=static_cast<AliESDfriend*>(event->FindListObject("AliESDfriend"));
366 Printf("ERROR: ESDfriend not available");
370 UInt_t time = event->GetTimeStamp();
371 Int_t ntracks = event->GetNumberOfTracks();
372 Int_t runNumber = event->GetRunNumber();
376 for (Int_t i=0;i<ntracks;++i) {
378 AliESDtrack *track = event->GetTrack(i);
379 if (!track) continue;
380 AliESDfriendTrack *friendTrack = esdFriend->GetTrack(i);
381 if (!friendTrack) continue;
383 const AliExternalTrackParam * trackIn = track->GetInnerParam();
384 const AliExternalTrackParam * trackOut = friendTrack->GetTPCOut();
385 if (!trackIn) continue;
386 if (!trackOut) continue;
388 // calculate necessary track parameters
389 Double_t meanP = trackIn->GetP();
390 Double_t meanDrift = 250 - 0.5*TMath::Abs(trackIn->GetZ() + trackOut->GetZ());
391 Int_t nclsDeDx = track->GetTPCNcls();
393 // exclude tracks which do not look like primaries or are simply too short or on wrong sectors
394 if (nclsDeDx < 60) continue;
395 if (TMath::Abs(trackIn->GetTgl()) > 1) continue;
396 if (TMath::Abs(trackIn->GetSnp()) > 0.6) continue;
399 TObject *calibObject;
400 AliTPCseed *seed = 0;
401 for (Int_t l=0;(calibObject=friendTrack->GetCalibObject(l));++l) {
402 if ((seed=dynamic_cast<AliTPCseed*>(calibObject))) break;
406 if (fLowMemoryConsumption) {
407 if (meanP > 0.5 || meanP < 0.4) continue;
408 meanP = 0.45; // set all momenta to one in order to save memory
410 Double_t tpcSignal = GetTPCdEdx(seed);
411 fHistDeDxTotal->Fill(meanP, tpcSignal);
413 //dE/dx, time, type (1-muon cosmic,2-pion beam data), momenta
414 Double_t vec[6] = {tpcSignal,time,2,meanDrift,meanP,runNumber};
415 fHistGainTime->Fill(vec);
423 Float_t AliTPCcalibTimeGain::GetTPCdEdx(AliTPCseed * seed) {
425 // calculate tpc dEdx
429 if (!fUseCookAnalytical) {
430 signal = (1/fMIP)*seed->CookdEdxNorm(fLowerTrunc,fUpperTrunc,fUseMax,0,159,fUseShapeNorm,fUsePosNorm,fUsePadNorm,0);
432 signal = (1/fMIP)*seed->CookdEdxAnalytical(fLowerTrunc,fUpperTrunc,fUseMax);
439 void AliTPCcalibTimeGain::AnalyzeRun(Int_t minEntries) {
441 // Analyze results of calibration
444 fHistGainTime->GetAxis(2)->SetRangeUser(0.51,1.49); // only cosmics
445 fHistGainTime->GetAxis(4)->SetRangeUser(20,100); // only Fermi-Plateau muons
447 fHistGainTime->GetAxis(2)->SetRangeUser(1.51,2.49); // only beam data
448 fHistGainTime->GetAxis(4)->SetRangeUser(0.39,0.51); // only MIP pions
451 fGainVsTime = AliTPCcalibBase::FitSlices(fHistGainTime,0,1,minEntries,10);
457 TGraphErrors * AliTPCcalibTimeGain::GetGraphGainVsTime(Int_t runNumber, Int_t minEntries) {
459 // Analyze results and get the graph
461 if (runNumber == 0) {
463 AnalyzeRun(minEntries);
466 // 1st check if the current run was cosmic or beam event
467 fHistGainTime->GetAxis(5)->SetRangeUser(runNumber,runNumber);
468 AnalyzeRun(minEntries);
470 if (fGainVsTime->GetN() == 0) return 0;
474 Long64_t AliTPCcalibTimeGain::Merge(TCollection *li) {
478 TIterator* iter = li->MakeIterator();
479 AliTPCcalibTimeGain* cal = 0;
481 while ((cal = (AliTPCcalibTimeGain*)iter->Next())) {
482 if (!cal->InheritsFrom(AliTPCcalibTimeGain::Class())) {
483 Error("Merge","Attempt to add object of class %s to a %s", cal->ClassName(), this->ClassName());
487 // add histograms here...
488 if (cal->GetHistGainTime()) fHistGainTime->Add(cal->GetHistGainTime());
489 if (cal->GetHistDeDxTotal()) fHistDeDxTotal->Add(cal->GetHistDeDxTotal());
498 AliSplineFit * AliTPCcalibTimeGain::MakeSplineFit(TGraphErrors * graph) {
500 // make spline fit of gain
502 AliSplineFit *fit = new AliSplineFit();
503 fit->SetGraph(graph);
504 fit->SetMinPoints(graph->GetN()+1);
505 fit->InitKnots(graph,2,0,0.001);
513 TGraphErrors * AliTPCcalibTimeGain::GetGraphAttachment(Int_t minEntries, Int_t nmaxBin, Float_t /*fracLow*/, Float_t /*fracUp*/) {
515 // For each time bin the driftlength-dependence of the signal is fitted.
517 TH3D * hist = fHistGainTime->Projection(1, 0, 3);
518 Double_t *xvec = new Double_t[hist->GetNbinsX()];
519 Double_t *yvec = new Double_t[hist->GetNbinsX()];
520 Double_t *xerr = new Double_t[hist->GetNbinsX()];
521 Double_t *yerr = new Double_t[hist->GetNbinsX()];
523 TH2D * projectionHist = 0x0;
525 for(Int_t i=1; i < hist->GetNbinsX(); i++) {
529 for (Int_t idelta=0; idelta<nmaxBin; idelta++){
531 imin = TMath::Max(i-idelta,1);
532 imax = TMath::Min(i+idelta,hist->GetNbinsX());
533 nsum = TMath::Nint(hist->Integral(imin,imax,1,hist->GetNbinsY()-1,1,hist->GetNbinsZ()-1));
535 if (nsum>minEntries) break;
537 if (nsum<minEntries) continue;
539 hist->GetXaxis()->SetRange(imin,imax);
540 projectionHist = (TH2D*)hist->Project3D("yzNUFNOF");
543 projectionHist->FitSlicesY(0,2, projectionHist->GetNbinsX()-2,0,"QNR",&arr);
544 TH1D * histAttach = (TH1D*)arr.At(1);
545 TF1 pol1("polynom1","pol1",10,240);
546 histAttach->Fit(&pol1,"QNR");
547 xvec[counter] = 0.5*(hist->GetXaxis()->GetBinCenter(imin)+hist->GetXaxis()->GetBinCenter(imax));
548 yvec[counter] = pol1.GetParameter(1)/pol1.GetParameter(0);
550 yerr[counter] = pol1.GetParError(1)/pol1.GetParameter(0);
553 delete projectionHist;
556 TGraphErrors * graphErrors = new TGraphErrors(counter, xvec, yvec, xerr, yerr);
568 void AliTPCcalibTimeGain::BinLogX(THnSparse *h, Int_t axisDim) {
570 // Method for the correct logarithmic binning of histograms
572 TAxis *axis = h->GetAxis(axisDim);
573 int bins = axis->GetNbins();
575 Double_t from = axis->GetXmin();
576 Double_t to = axis->GetXmax();
577 Double_t *newBins = new Double_t[bins + 1];
580 Double_t factor = pow(to/from, 1./bins);
582 for (int i = 1; i <= bins; i++) {
583 newBins[i] = factor * newBins[i-1];
585 axis->Set(bins, newBins);
591 void AliTPCcalibTimeGain::BinLogX(TH1 *h) {
593 // Method for the correct logarithmic binning of histograms
595 TAxis *axis = h->GetXaxis();
596 int bins = axis->GetNbins();
598 Double_t from = axis->GetXmin();
599 Double_t to = axis->GetXmax();
600 Double_t *newBins = new Double_t[bins + 1];
603 Double_t factor = pow(to/from, 1./bins);
605 for (int i = 1; i <= bins; i++) {
606 newBins[i] = factor * newBins[i-1];
608 axis->Set(bins, newBins);
615 void AliTPCcalibTimeGain::CalculateBetheAlephParams(TH2F *hist, Double_t * ini) {
617 // Fit the bethe bloch params
619 //{0.0762*MIP,10.632,1.34e-05,1.863,1.948}
620 const Double_t sigma = 0.06;
622 TH2F *histBG = new TH2F("histBG","dEdxBg; #beta #gamma; TPC signal (a.u.)",TMath::Nint(0.5*hist->GetNbinsX()),0.1,5000.,hist->GetNbinsY(),hist->GetYaxis()->GetXmin(),hist->GetYaxis()->GetXmax());
625 TF1 *foElectron = new TF1("foElectron", "AliExternalTrackParam::BetheBlochAleph(x/0.000511,[0],[1],[2],[3],[4])",0.01,100);
626 TF1 *foMuon = new TF1("foMuon", "AliExternalTrackParam::BetheBlochAleph(x/0.1056,[0],[1],[2],[3],[4])",0.01,100);
627 TF1 *foPion = new TF1("foPion", "AliExternalTrackParam::BetheBlochAleph(x/0.138,[0],[1],[2],[3],[4])",0.01,100);
628 TF1 *foKaon = new TF1("foKaon", "AliExternalTrackParam::BetheBlochAleph(x/0.498,[0],[1],[2],[3],[4])",0.01,100);
629 TF1 *foProton = new TF1("foProton", "AliExternalTrackParam::BetheBlochAleph(x/0.938,[0],[1],[2],[3],[4])",0.01,100);
630 foElectron->SetParameters(ini);
631 foMuon->SetParameters(ini);
632 foPion->SetParameters(ini);
633 foKaon->SetParameters(ini);
634 foProton->SetParameters(ini);
636 TCanvas *canvCheck1 = new TCanvas();
638 foElectron->Draw("same");
639 foMuon->Draw("same");
640 foPion->Draw("same");
641 foKaon->Draw("same");
642 foProton->Draw("same");
644 // Loop over all points of the input histogram
646 for(Int_t i=1; i < hist->GetNbinsX(); i++) {
647 Double_t x = hist->GetXaxis()->GetBinCenter(i);
648 for(Int_t j=1; j < hist->GetNbinsY(); j++) {
649 Long64_t n = hist->GetBin(i, j);
650 Double_t y = hist->GetYaxis()->GetBinCenter(j);
651 Double_t entries = hist->GetBinContent(n);
654 // 1. identify protons
656 if (TMath::Abs(y - foProton->Eval(x))/foProton->Eval(x) < 4*sigma && x < 0.65 ) {
657 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
660 // 2. identify electrons
663 if (TMath::Abs(y - foElectron->Eval(x))/foElectron->Eval(x) < 4*sigma && (x>0.25&&x<0.7) && fIsCosmic) {
664 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
667 if (TMath::Abs(y - foElectron->Eval(x))/foElectron->Eval(x) < 2*sigma && ((x>0.25&&x<0.35) || (x>1.5&&x<1.8) || (x>0.65&&x<0.7))) {
668 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
672 // 3. identify either muons or pions depending on cosmic or not
675 if (TMath::Abs(y - foMuon->Eval(x))/foMuon->Eval(x) < 4*sigma && x > 0.25 && x < 100 ) {
676 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
680 if (TMath::Abs(y - foPion->Eval(x))/foPion->Eval(x) < 4*sigma && x > 0.15 && x < 2) {
681 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
685 // 4. for pp also Kaons must be included
688 if (TMath::Abs(y - foKaon->Eval(x))/foKaon->Eval(x) < 4*sigma && x > 0.2 && x < 0.3 ) {
689 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
695 // Fit Aleph-Parameters to the obtained profile
696 TF1 * funcAlephD = new TF1("AlephParametrizationD", "AliExternalTrackParam::BetheBlochAleph(x,[0],[1],[2],[3],[4])",0.3,10000);
697 funcAlephD->SetParameters(ini);
699 TCanvas *canvCheck2 = new TCanvas();
703 TObjArray * arr = new TObjArray();
704 histBG->FitSlicesY(0,0,-1,0,"QN",arr);
705 TH1D * fitMean = (TH1D*) arr->At(1);
706 fitMean->Draw("same");
708 funcAlephD->SetParLimits(2,1e-3,1e-7);
709 funcAlephD->SetParLimits(3,0.5,3.5);
710 funcAlephD->SetParLimits(4,0.5,3.5);
711 fitMean->Fit(funcAlephD, "QNR");
712 funcAlephD->Draw("same");
714 for(Int_t i=0;i<5;i++) ini[i] = funcAlephD->GetParameter(i);
716 foElectron->SetParameters(ini);
717 foMuon->SetParameters(ini);
718 foPion->SetParameters(ini);
719 foKaon->SetParameters(ini);
720 foProton->SetParameters(ini);
722 TCanvas *canvCheck3 = new TCanvas();
724 foElectron->Draw("same");
725 foMuon->Draw("same");
726 foPion->Draw("same");
727 foKaon->Draw("same");
728 foProton->Draw("same");