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1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
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 **************************************************************************/
15
16/*
17
18This class provides the calibration of the time dependence of the TPC gain due to pressure and temperature changes etc.
19
20
21//0. Libraries to load
22gSystem->Load("libANALYSIS");
23gSystem->Load("libSTAT");
24gSystem->Load("libTPCcalib");
25
26
27//1. Do calibration ...
28//
29// compare reference
30
31//
32//2. Visualize results
33//
34TFile fcalib("CalibObjects.root");
35TObjArray * array = (TObjArray*)fcalib.Get("TPCCalib");
36AliTPCcalibTimeGain * gain = ( AliTPCcalibTimeGain *)array->FindObject("calibTimeGain");
37TGraphErrors * gr = gain->GetGraphGainVsTime(0,1000)
38
39// gain->GetHistGainTime()->GetAxis(1)->SetRangeUser(1213.8e6,1214.3e6)
40TH2D * GainTime = gain->GetHistGainTime()->Projection(0,1)
41GainTime->GetXaxis()->SetTimeDisplay(kTRUE)
42GainTime->GetXaxis()->SetTimeFormat("#splitline{%d/%m}{%H:%M}")
43GainTime->Draw("colz")
44
45//
46// MakeSlineFit example
47//
48AliSplineFit *fit = AliTPCcalibTimeGain::MakeSplineFit(gr)
49
50TGraph * grfit = fit.MakeGraph(gr->GetX()[0],gr->GetX()[gr->GetN()-1],50000,0);
51
52gr->SetMarkerStyle(25);
53gr->Draw("lp");
54grfit->SetLineColor(2);
55grfit->Draw("lu");
56
57//
58// QA - dE/dx resoultion as a function of time
59//TCa
60
61TGraph * grSigma = AliTPCcalibBase::FitSlicesSigma(gain->GetHistGainTime(),0,1,1800,5)
62
63TCanvas *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
67 pad1->Draw();
68 pad1->cd();
69
70GainTime->Draw("colz")
71gr->Draw("lp")
72
73
74
75 c1->cd();
76 Double_t ymin = -0.04;
77 Double_t ymax = 0.12;
78Double_t dy = (ymax-ymin)/0.8;
79Double_t xmin = GainTime->GetXaxis()->GetXmin()
80Double_t xmax = GainTime->GetXaxis()->GetXmax()
81Double_t dx = (xmax-xmin)/0.8; //10 per cent margins left and right
82pad2->Range(xmin-0.1*dx,ymin-0.1*dy,xmax+0.1*dx,ymax+0.1*dy);
83 pad2->Draw();
84 pad2->cd();
85grSigma->SetLineColor(2);
86grSigma->SetLineWidth(2);
87grSigma->Draw("lp")
88TGaxis *axis = new TGaxis(xmax,ymin,xmax,ymax,ymin,ymax,50510,"+L");
89 axis->SetLabelColor(kRed);
90 axis->SetTitle("dE/dx resolution #sigma_{dE/dx}");
91 axis->Draw();
92
93////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
94
95 ----> make Attachment study
96
97TFile fcalib("CalibObjects40366b.root");
98TObjArray * array = (TObjArray*)fcalib.Get("TPCCalib");
99AliTPCcalibTimeGain * gain = ( AliTPCcalibTimeGain *)array->FindObject("calibTimeGain");
100TGraphErrors * grAttach = gain->GetGraphAttachment(2000,4)
101
102TCanvas *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
106 pad1->Draw();
107 pad1->cd();
108
109gain->GetHistGainTime()->GetAxis(1)->SetRangeUser(1213.8e6,1214.3e6)
110TH2D * GainTime = gain->GetHistGainTime()->Projection(0,1)
111GainTime->GetXaxis()->SetTimeDisplay(kTRUE)
112GainTime->GetXaxis()->SetTimeFormat("#splitline{%d/%m}{%H:%M}")
113GainTime->Draw("colz")
114//gr->Draw("lp")
115
116 c1->cd();
117 Double_t ymin = -0.001;
118 Double_t ymax = 0.001;
119Double_t dy = (ymax-ymin)/0.8;
120Double_t xmin = GainTime->GetXaxis()->GetXmin()
121Double_t xmax = GainTime->GetXaxis()->GetXmax()
122Double_t dx = (xmax-xmin)/0.8; //10 per cent margins left and right
123pad2->Range(xmin-0.1*dx,ymin-0.1*dy,xmax+0.1*dx,ymax+0.1*dy);
124 pad2->Draw();
125 pad2->cd();
126grAttach->SetLineColor(2);
127grAttach->SetLineWidth(2);
128grAttach->Draw("lp")
129TGaxis *axis = new TGaxis(xmax,ymin,xmax,ymax,ymin,ymax,50510,"+L");
130 axis->SetLabelColor(kRed);
131 axis->SetTitle("attachment coefficient b");
132 axis->Draw();
133
134
135*/
136
137
138#include "Riostream.h"
139#include "TChain.h"
140#include "TTree.h"
141#include "TH1F.h"
142#include "TH2F.h"
143#include "TH3F.h"
144#include "THnSparse.h"
145#include "TGraphErrors.h"
146#include "TList.h"
147#include "TMath.h"
148#include "TCanvas.h"
149#include "TFile.h"
150#include "TF1.h"
151#include "TVectorD.h"
152#include "TProfile.h"
153#include "TGraphErrors.h"
154#include "TCanvas.h"
155
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"
163
164#include "AliTracker.h"
165#include "AliMagF.h"
166#include "AliTPCCalROC.h"
167#include "AliESDv0.h"
168
169#include "AliLog.h"
170
171#include "AliTPCcalibTimeGain.h"
172
173#include "TTreeStream.h"
174#include "AliTPCTracklet.h"
175#include "TTimeStamp.h"
176#include "AliTPCcalibDB.h"
177#include "AliTPCcalibLaser.h"
178#include "AliDCSSensorArray.h"
179#include "AliDCSSensor.h"
180
181ClassImp(AliTPCcalibTimeGain)
182
183Double_t AliTPCcalibTimeGain::fgMergeEntriesCut=10000000.;
184
185AliTPCcalibTimeGain::AliTPCcalibTimeGain()
186 :AliTPCcalibBase(),
187 fHistGainTime(0),
188 fGainVsTime(0),
189 fHistDeDxTotal(0),
190 fIntegrationTimeDeDx(0),
191 fMIP(0),
192 fUseMax(0),
193 fLowerTrunc(0),
194 fUpperTrunc(0),
195 fUseShapeNorm(0),
196 fUsePosNorm(0),
197 fUsePadNorm(0),
198 fUseCookAnalytical(0),
199 fIsCosmic(0),
200 fLowMemoryConsumption(0)
201{
202 //
203 // Default constructor
204 //
205 AliDebug(5,"Default Constructor");
206}
207
208
209AliTPCcalibTimeGain::AliTPCcalibTimeGain(const Text_t *name, const Text_t *title, UInt_t StartTime, UInt_t EndTime, Int_t deltaIntegrationTimeGain)
210 :AliTPCcalibBase(),
211 fHistGainTime(0),
212 fGainVsTime(0),
213 fHistDeDxTotal(0),
214 fIntegrationTimeDeDx(0),
215 fMIP(0),
216 fUseMax(0),
217 fLowerTrunc(0),
218 fUpperTrunc(0),
219 fUseShapeNorm(0),
220 fUsePosNorm(0),
221 fUsePadNorm(0),
222 fUseCookAnalytical(0),
223 fIsCosmic(0),
224 fLowMemoryConsumption(0)
225{
226 //
227 // No default constructor
228 //
229 SetName(name);
230 SetTitle(title);
231
232 AliDebug(5,"Non Default Constructor");
233
234 fIntegrationTimeDeDx = deltaIntegrationTimeGain;
235
236 Double_t deltaTime = EndTime - StartTime;
237
238
239 // main histogram for time dependence: dE/dx, time, type (1-muon cosmic,2-pion beam data, 3&4 - proton points at higher dE/dx), meanDriftlength, momenta (only filled if enough space is available), run number, eta
240 Int_t timeBins = TMath::Nint(deltaTime/deltaIntegrationTimeGain);
241 Int_t binsGainTime[7] = {150, timeBins, 4, 25, 200, 10000000, 20};
242 Double_t xminGainTime[7] = {0.5, StartTime, 0.5, 0, 0.1, -0.5, -1};
243 Double_t xmaxGainTime[7] = { 8, EndTime, 4.5, 250, 50, 9999999.5, 1};
244 fHistGainTime = new THnSparseF("HistGainTime","dEdx time dep.;dEdx,time,type,driftlength,momenta,run number, eta;dEdx",7,binsGainTime,xminGainTime,xmaxGainTime);
245 BinLogX(fHistGainTime, 4);
246 //
247 fHistDeDxTotal = new TH2F("DeDx","dEdx; momentum p (GeV); TPC signal (a.u.)",250,0.01,100.,1000,0.,8);
248 BinLogX(fHistDeDxTotal);
249
250 // default values for dE/dx
251 fMIP = 50.;
252 fUseMax = kTRUE;
253 fLowerTrunc = 0.02;
254 fUpperTrunc = 0.6;
255 fUseShapeNorm = kTRUE;
256 fUsePosNorm = kFALSE;
257 fUsePadNorm = kFALSE;
258 fUseCookAnalytical = kFALSE;
259 //
260 fIsCosmic = kTRUE;
261 fLowMemoryConsumption = kTRUE;
262 //
263
264}
265
266
267
268AliTPCcalibTimeGain::~AliTPCcalibTimeGain(){
269 //
270 // Destructor
271 //
272 delete fHistGainTime;
273 delete fGainVsTime;
274 delete fHistDeDxTotal;
275}
276
277
278void AliTPCcalibTimeGain::Process(AliESDEvent *event) {
279 //
280 // main track loop
281 //
282 if (!event) {
283 Printf("ERROR: ESD not available");
284 return;
285 }
286 AliESDfriend *ESDfriend=static_cast<AliESDfriend*>(event->FindListObject("AliESDfriend"));
287 if (!ESDfriend) {
288 return;
289 }
290 if (ESDfriend->TestSkipBit()) return;
291
292 if (fIsCosmic) { // this should be removed at some point based on trigger mask !?
293 ProcessCosmicEvent(event);
294 } else {
295 ProcessBeamEvent(event);
296 }
297
298
299
300
301}
302
303
304void AliTPCcalibTimeGain::ProcessCosmicEvent(AliESDEvent *event) {
305 //
306 // Process in case of cosmic event
307 //
308 AliESDfriend *esdFriend=static_cast<AliESDfriend*>(event->FindListObject("AliESDfriend"));
309 if (!esdFriend) {
310 Printf("ERROR: ESDfriend not available");
311 return;
312 }
313 //
314 UInt_t time = event->GetTimeStamp();
315 Int_t nFriendTracks = esdFriend->GetNumberOfTracks();
316 Int_t runNumber = event->GetRunNumber();
317 //
318 // track loop
319 //
320 for (Int_t i=0;i<nFriendTracks;++i) {
321
322 AliESDtrack *track = event->GetTrack(i);
323 if (!track) continue;
324 AliESDfriendTrack *friendTrack = esdFriend->GetTrack(i);
325 if (!friendTrack) continue;
326 const AliExternalTrackParam * trackIn = track->GetInnerParam();
327 const AliExternalTrackParam * trackOut = friendTrack->GetTPCOut();
328 if (!trackIn) continue;
329 if (!trackOut) continue;
330
331 // calculate necessary track parameters
332 Double_t meanP = trackIn->GetP();
333 Double_t meanDrift = 250 - 0.5*TMath::Abs(trackIn->GetZ() + trackOut->GetZ());
334 Int_t nclsDeDx = track->GetTPCNcls();
335
336 // exclude tracks which do not look like primaries or are simply too short or on wrong sectors
337 if (nclsDeDx < 60) continue;
338 if (TMath::Abs(trackIn->GetTgl()) > 1) continue;
339 if (TMath::Abs(trackIn->GetSnp()) > 0.6) continue;
340
341 // Get seeds
342 TObject *calibObject;
343 AliTPCseed *seed = 0;
344 for (Int_t l=0;(calibObject=friendTrack->GetCalibObject(l));++l) {
345 if ((seed=dynamic_cast<AliTPCseed*>(calibObject))) break;
346 }
347
348 if (seed) {
349 Double_t tpcSignal = GetTPCdEdx(seed);
350 if (nclsDeDx > 100) fHistDeDxTotal->Fill(meanP, tpcSignal);
351 //
352 if (fLowMemoryConsumption) {
353 if (meanP < 20) continue;
354 meanP = 30; // set all momenta to one in order to save memory
355 }
356 //dE/dx, time, type (1-muon cosmic,2-pion beam data), momenta
357 Double_t vec[6] = {tpcSignal,time,1,meanDrift,meanP,runNumber};
358 fHistGainTime->Fill(vec);
359 }
360
361 }
362
363}
364
365
366
367void AliTPCcalibTimeGain::ProcessBeamEvent(AliESDEvent *event) {
368 //
369 // Process in case of beam event
370 //
371 AliESDfriend *esdFriend=static_cast<AliESDfriend*>(event->FindListObject("AliESDfriend"));
372 if (!esdFriend) {
373 Printf("ERROR: ESDfriend not available");
374 return;
375 }
376 //
377 UInt_t time = event->GetTimeStamp();
378 Int_t nFriendTracks = esdFriend->GetNumberOfTracks();
379 Int_t runNumber = event->GetRunNumber();
380 //
381 // track loop
382 //
383 for (Int_t i=0;i<nFriendTracks;++i) { // begin track loop
384
385 AliESDtrack *track = event->GetTrack(i);
386 if (!track) continue;
387 AliESDfriendTrack *friendTrack = esdFriend->GetTrack(i);
388 if (!friendTrack) continue;
389
390 const AliExternalTrackParam * trackIn = track->GetInnerParam();
391 const AliExternalTrackParam * trackOut = friendTrack->GetTPCOut();
392 if (!trackIn) continue;
393 if (!trackOut) continue;
394
395 // calculate necessary track parameters
396 Double_t meanP = trackIn->GetP();
397 Double_t meanDrift = 250 - 0.5*TMath::Abs(trackIn->GetZ() + trackOut->GetZ());
398 Int_t nclsDeDx = track->GetTPCNcls();
399
400 // exclude tracks which do not look like primaries or are simply too short or on wrong sectors
401 if (nclsDeDx < 60) continue;
402 //if (TMath::Abs(trackIn->GetTgl()) > 1) continue;
403 //if (TMath::Abs(trackIn->GetSnp()) > 0.6) continue;
404 if (TMath::Abs(trackIn->Eta()) > 1) continue;
405 UInt_t status = track->GetStatus();
406 if ((status&AliESDtrack::kTPCrefit)==0) continue;
407 //if (track->GetNcls(0) < 3) continue; // ITS clusters
408 Float_t dca[2], cov[3];
409 track->GetImpactParameters(dca,cov);
410 if (TMath::Abs(dca[0]) > 7 || TMath::Abs(dca[0]) < 0.0000001 || TMath::Abs(dca[1]) > 25 ) continue; // cut in xy
411 Double_t eta = trackIn->Eta();
412
413 // Get seeds
414 TObject *calibObject;
415 AliTPCseed *seed = 0;
416 for (Int_t l=0;(calibObject=friendTrack->GetCalibObject(l));++l) {
417 if ((seed=dynamic_cast<AliTPCseed*>(calibObject))) break;
418 }
419
420 if (seed) {
421 Int_t particleCase = 0;
422 if (meanP < 0.5 && meanP > 0.4) particleCase = 2; // MIP pions
423 if (meanP < 0.57 && meanP > 0.56) particleCase = 3; // protons 1
424 if (meanP < 0.66 && meanP > 0.65) particleCase = 4; // protons 2
425 //
426 if (fLowMemoryConsumption && particleCase == 0) continue;
427 //
428 Double_t tpcSignal = GetTPCdEdx(seed);
429 fHistDeDxTotal->Fill(meanP, tpcSignal);
430 //
431 //dE/dx, time, type (1-muon cosmic,2-pion beam data, 3&4 protons), momenta, runNumner, eta
432 Double_t vec[7] = {tpcSignal,time,particleCase,meanDrift,meanP,runNumber, eta};
433 fHistGainTime->Fill(vec);
434 }
435
436 } // end track loop
437 //
438 // V0 loop -- in beam events the cosmic part of the histogram is filled with GammaConversions
439 //
440 for(Int_t iv0 = 0; iv0 < event->GetNumberOfV0s(); iv0++) {
441 AliESDv0 * v0 = event->GetV0(iv0);
442 if (!v0->GetOnFlyStatus()) continue;
443 if (v0->GetEffMass(0,0) > 0.02) continue; // select low inv. mass
444 Double_t xyz[3];
445 v0->GetXYZ(xyz[0], xyz[1], xyz[2]);
446 if (TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]) < 3 || TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]) > 30) continue;
447 //
448 // "loop over daughters"
449 //
450 for(Int_t idaughter = 0; idaughter < 2; idaughter++) { // daughter loop
451 Int_t index = idaughter == 0 ? v0->GetPindex() : v0->GetNindex();
452 AliESDtrack * trackP = event->GetTrack(index);
453 AliESDfriendTrack *friendTrackP = esdFriend->GetTrack(index);
454 if (!friendTrackP) continue;
455 const AliExternalTrackParam * trackPIn = trackP->GetInnerParam();
456 const AliExternalTrackParam * trackPOut = friendTrackP->GetTPCOut();
457 if (!trackPIn) continue;
458 if (!trackPOut) continue;
459 // calculate necessary track parameters
460 Double_t meanP = trackPIn->GetP();
461 Double_t meanDrift = 250 - 0.5*TMath::Abs(trackPIn->GetZ() + trackPOut->GetZ());
462 Int_t nclsDeDx = trackP->GetTPCNcls();
463 // exclude tracks which do not look like primaries or are simply too short or on wrong sectors
464 if (nclsDeDx < 60) continue;
465 if (TMath::Abs(trackPIn->GetTgl()) > 1) continue;
466 //
467 TObject *calibObject;
468 AliTPCseed *seed = 0;
469 for (Int_t l=0;(calibObject=friendTrackP->GetCalibObject(l));++l) {
470 if ((seed=dynamic_cast<AliTPCseed*>(calibObject))) break;
471 }
472 if (seed) {
473 if (fLowMemoryConsumption) {
474 if (meanP > 0.5 || meanP < 0.4) continue;
475 meanP = 0.45; // set all momenta to one in order to save memory
476 }
477 Double_t tpcSignal = GetTPCdEdx(seed);
478 //dE/dx, time, type (1-muon cosmic,2-pion beam data), momenta
479 Double_t vec[6] = {tpcSignal,time,1,meanDrift,meanP,runNumber};
480 fHistGainTime->Fill(vec);
481 }
482 }
483
484 }
485
486}
487
488
489Float_t AliTPCcalibTimeGain::GetTPCdEdx(AliTPCseed * seed) {
490 //
491 // calculate tpc dEdx
492 //
493 Double_t signal = 0;
494 //
495 if (!fUseCookAnalytical) {
496 signal = (1/fMIP)*seed->CookdEdxNorm(fLowerTrunc,fUpperTrunc,fUseMax,0,159,fUseShapeNorm,fUsePosNorm,fUsePadNorm,0);
497 } else {
498 signal = (1/fMIP)*seed->CookdEdxAnalytical(fLowerTrunc,fUpperTrunc,fUseMax);
499 }
500 //
501 return signal;
502}
503
504
505void AliTPCcalibTimeGain::AnalyzeRun(Int_t minEntries) {
506 //
507 // Analyze results of calibration
508 //
509 if (fIsCosmic) {
510 fHistGainTime->GetAxis(2)->SetRangeUser(0.51,1.49); // only cosmics
511 fHistGainTime->GetAxis(4)->SetRangeUser(20,100); // only Fermi-Plateau muons
512 } else {
513 fHistGainTime->GetAxis(2)->SetRangeUser(1.51,2.49); // only beam data
514 fHistGainTime->GetAxis(4)->SetRangeUser(0.39,0.51); // only MIP pions
515 }
516 //
517 fGainVsTime = AliTPCcalibBase::FitSlices(fHistGainTime,0,1,minEntries,10);
518 //
519 return;
520}
521
522
523TGraphErrors * AliTPCcalibTimeGain::GetGraphGainVsTime(Int_t runNumber, Int_t minEntries) {
524 //
525 // Analyze results and get the graph
526 //
527 if (runNumber == 0) {
528 if (!fGainVsTime) {
529 AnalyzeRun(minEntries);
530 }
531 } else {
532 // 1st check if the current run was cosmic or beam event
533 fHistGainTime->GetAxis(5)->SetRangeUser(runNumber,runNumber);
534 AnalyzeRun(minEntries);
535 }
536 if (fGainVsTime->GetN() == 0) return 0;
537 return fGainVsTime;
538}
539
540Long64_t AliTPCcalibTimeGain::Merge(TCollection *li) {
541 //
542 // merge component
543 //
544 TIterator* iter = li->MakeIterator();
545 AliTPCcalibTimeGain* cal = 0;
546
547 while ((cal = (AliTPCcalibTimeGain*)iter->Next())) {
548 if (!cal->InheritsFrom(AliTPCcalibTimeGain::Class())) {
549 Error("Merge","Attempt to add object of class %s to a %s", cal->ClassName(), this->ClassName());
550 return -1;
551 }
552
553 // add histograms here...
554 if (cal->GetHistGainTime() && fHistGainTime )
555 {
556 if ((fHistGainTime->GetEntries() + cal->GetHistGainTime()->GetEntries()) < fgMergeEntriesCut)
557 {
558 //AliInfo(Form("fHistGainTime has %.0f tracks, going to add %.0f\n",fHistGainTime->GetEntries(),cal->GetHistGainTime()->GetEntries()));
559 fHistGainTime->Add(cal->GetHistGainTime());
560 }
561 else
562 {
563 AliInfo(Form("fHistGainTime full (has %.0f merged tracks, max allowed: %.0f)",fHistGainTime->GetEntries(),fgMergeEntriesCut));
564 }
565 }
566
567 if (cal->GetHistDeDxTotal()) fHistDeDxTotal->Add(cal->GetHistDeDxTotal());
568
569 }
570 delete iter;
571 return 0;
572
573}
574
575
576AliSplineFit * AliTPCcalibTimeGain::MakeSplineFit(TGraphErrors * graph) {
577 //
578 // make spline fit of gain
579 //
580 AliSplineFit *fit = new AliSplineFit();
581 fit->SetGraph(graph);
582 fit->SetMinPoints(graph->GetN()+1);
583 fit->InitKnots(graph,2,0,0.001);
584 fit->SplineFit(0);
585 return fit;
586
587}
588
589
590
591TGraphErrors * AliTPCcalibTimeGain::GetGraphAttachment(Int_t minEntries, Int_t nmaxBin, Float_t /*fracLow*/, Float_t /*fracUp*/) {
592 //
593 // For each time bin the driftlength-dependence of the signal is fitted.
594 //
595 TH3D * hist = fHistGainTime->Projection(1, 0, 3);
596 Double_t *xvec = new Double_t[hist->GetNbinsX()];
597 Double_t *yvec = new Double_t[hist->GetNbinsX()];
598 Double_t *xerr = new Double_t[hist->GetNbinsX()];
599 Double_t *yerr = new Double_t[hist->GetNbinsX()];
600 Int_t counter = 0;
601 TH2D * projectionHist = 0x0;
602 //
603 for(Int_t i=1; i < hist->GetNbinsX(); i++) {
604 Int_t nsum=0;
605 Int_t imin = i;
606 Int_t imax = i;
607 for (Int_t idelta=0; idelta<nmaxBin; idelta++){
608 //
609 imin = TMath::Max(i-idelta,1);
610 imax = TMath::Min(i+idelta,hist->GetNbinsX());
611 nsum = TMath::Nint(hist->Integral(imin,imax,1,hist->GetNbinsY()-1,1,hist->GetNbinsZ()-1));
612 if (nsum==0) break;
613 if (nsum>minEntries) break;
614 }
615 if (nsum<minEntries) continue;
616 //
617 hist->GetXaxis()->SetRange(imin,imax);
618 projectionHist = (TH2D*)hist->Project3D("yzNUFNOF");
619 //
620 TObjArray arr;
621 projectionHist->FitSlicesY(0,2, projectionHist->GetNbinsX()-2,0,"QNR",&arr);
622 TH1D * histAttach = (TH1D*)arr.At(1);
623 TF1 pol1("polynom1","pol1",10,240);
624 histAttach->Fit(&pol1,"QNR");
625 xvec[counter] = 0.5*(hist->GetXaxis()->GetBinCenter(imin)+hist->GetXaxis()->GetBinCenter(imax));
626 yvec[counter] = pol1.GetParameter(1)/pol1.GetParameter(0);
627 xerr[counter] = 0;
628 yerr[counter] = pol1.GetParError(1)/pol1.GetParameter(0);
629 counter++;
630 //
631 delete projectionHist;
632 }
633
634 TGraphErrors * graphErrors = new TGraphErrors(counter, xvec, yvec, xerr, yerr);
635 delete [] xvec;
636 delete [] yvec;
637 delete [] xerr;
638 delete [] yerr;
639 delete hist;
640 return graphErrors;
641
642}
643
644
645
646void AliTPCcalibTimeGain::BinLogX(THnSparse *h, Int_t axisDim) {
647 //
648 // Method for the correct logarithmic binning of histograms
649 //
650 TAxis *axis = h->GetAxis(axisDim);
651 int bins = axis->GetNbins();
652
653 Double_t from = axis->GetXmin();
654 Double_t to = axis->GetXmax();
655 Double_t *newBins = new Double_t[bins + 1];
656
657 newBins[0] = from;
658 Double_t factor = pow(to/from, 1./bins);
659
660 for (int i = 1; i <= bins; i++) {
661 newBins[i] = factor * newBins[i-1];
662 }
663 axis->Set(bins, newBins);
664 delete[] newBins;
665
666}
667
668
669void AliTPCcalibTimeGain::BinLogX(TH1 *h) {
670 //
671 // Method for the correct logarithmic binning of histograms
672 //
673 TAxis *axis = h->GetXaxis();
674 int bins = axis->GetNbins();
675
676 Double_t from = axis->GetXmin();
677 Double_t to = axis->GetXmax();
678 Double_t *newBins = new Double_t[bins + 1];
679
680 newBins[0] = from;
681 Double_t factor = pow(to/from, 1./bins);
682
683 for (int i = 1; i <= bins; i++) {
684 newBins[i] = factor * newBins[i-1];
685 }
686 axis->Set(bins, newBins);
687 delete[] newBins;
688
689}
690
691
692
693void AliTPCcalibTimeGain::CalculateBetheAlephParams(TH2F *hist, Double_t * ini) {
694 //
695 // Fit the bethe bloch params
696 //
697 //{0.0762*MIP,10.632,1.34e-05,1.863,1.948}
698 const Double_t sigma = 0.06;
699
700 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());
701 BinLogX(histBG);
702
703 TF1 *foElectron = new TF1("foElectron", "AliExternalTrackParam::BetheBlochAleph(x/0.000511,[0],[1],[2],[3],[4])",0.01,100);
704 TF1 *foMuon = new TF1("foMuon", "AliExternalTrackParam::BetheBlochAleph(x/0.1056,[0],[1],[2],[3],[4])",0.01,100);
705 TF1 *foPion = new TF1("foPion", "AliExternalTrackParam::BetheBlochAleph(x/0.138,[0],[1],[2],[3],[4])",0.01,100);
706 TF1 *foKaon = new TF1("foKaon", "AliExternalTrackParam::BetheBlochAleph(x/0.498,[0],[1],[2],[3],[4])",0.01,100);
707 TF1 *foProton = new TF1("foProton", "AliExternalTrackParam::BetheBlochAleph(x/0.938,[0],[1],[2],[3],[4])",0.01,100);
708 foElectron->SetParameters(ini);
709 foMuon->SetParameters(ini);
710 foPion->SetParameters(ini);
711 foKaon->SetParameters(ini);
712 foProton->SetParameters(ini);
713
714 TCanvas *canvCheck1 = new TCanvas();
715 hist->Draw("colz");
716 foElectron->Draw("same");
717 foMuon->Draw("same");
718 foPion->Draw("same");
719 foKaon->Draw("same");
720 foProton->Draw("same");
721
722 // Loop over all points of the input histogram
723
724 for(Int_t i=1; i < hist->GetNbinsX(); i++) {
725 Double_t x = hist->GetXaxis()->GetBinCenter(i);
726 for(Int_t j=1; j < hist->GetNbinsY(); j++) {
727 Long64_t n = hist->GetBin(i, j);
728 Double_t y = hist->GetYaxis()->GetBinCenter(j);
729 Double_t entries = hist->GetBinContent(n);
730 Double_t mass = 0;
731
732 // 1. identify protons
733 mass = 0.938;
734 if (TMath::Abs(y - foProton->Eval(x))/foProton->Eval(x) < 4*sigma && x < 0.65 ) {
735 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
736 }
737
738 // 2. identify electrons
739 mass = 0.000511;
740 if (fIsCosmic) {
741 if (TMath::Abs(y - foElectron->Eval(x))/foElectron->Eval(x) < 4*sigma && (x>0.25&&x<0.7) && fIsCosmic) {
742 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
743 }
744 } else {
745 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))) {
746 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
747 }
748 }
749
750 // 3. identify either muons or pions depending on cosmic or not
751 if (fIsCosmic) {
752 mass = 0.1056;
753 if (TMath::Abs(y - foMuon->Eval(x))/foMuon->Eval(x) < 4*sigma && x > 0.25 && x < 100 ) {
754 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
755 }
756 } else {
757 mass = 0.1396;
758 if (TMath::Abs(y - foPion->Eval(x))/foPion->Eval(x) < 4*sigma && x > 0.15 && x < 2) {
759 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
760 }
761 }
762
763 // 4. for pp also Kaons must be included
764 if (!fIsCosmic) {
765 mass = 0.4936;
766 if (TMath::Abs(y - foKaon->Eval(x))/foKaon->Eval(x) < 4*sigma && x > 0.2 && x < 0.3 ) {
767 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
768 }
769 }
770 }
771 }
772
773 // Fit Aleph-Parameters to the obtained profile
774 TF1 * funcAlephD = new TF1("AlephParametrizationD", "AliExternalTrackParam::BetheBlochAleph(x,[0],[1],[2],[3],[4])",0.3,10000);
775 funcAlephD->SetParameters(ini);
776
777 TCanvas *canvCheck2 = new TCanvas();
778 histBG->Draw();
779
780 //FitSlices
781 TObjArray * arr = new TObjArray();
782 histBG->FitSlicesY(0,0,-1,0,"QN",arr);
783 TH1D * fitMean = (TH1D*) arr->At(1);
784 fitMean->Draw("same");
785
786 funcAlephD->SetParLimits(2,1e-3,1e-7);
787 funcAlephD->SetParLimits(3,0.5,3.5);
788 funcAlephD->SetParLimits(4,0.5,3.5);
789 fitMean->Fit(funcAlephD, "QNR");
790 funcAlephD->Draw("same");
791
792 for(Int_t i=0;i<5;i++) ini[i] = funcAlephD->GetParameter(i);
793
794 foElectron->SetParameters(ini);
795 foMuon->SetParameters(ini);
796 foPion->SetParameters(ini);
797 foKaon->SetParameters(ini);
798 foProton->SetParameters(ini);
799
800 TCanvas *canvCheck3 = new TCanvas();
801 hist->Draw("colz");
802 foElectron->Draw("same");
803 foMuon->Draw("same");
804 foPion->Draw("same");
805 foKaon->Draw("same");
806 foProton->Draw("same");
807
808 canvCheck1->Print();
809 canvCheck2->Print();
810 canvCheck3->Print();
811
812 return;
813
814
815}