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 **************************************************************************/
15 /* $Id: AliTOFT0maker.cxx,v 1.8 2010/01/19 16:32:20 noferini Exp $ */
17 /////////////////////////////////////////////////////////////////////////////
19 // This class contains the basic functions for the time zero //
20 // evaluation with TOF detector informations. //
21 // Use case in an analysis task: //
23 // Create the object in the task constructor (fTOFmaker is a private var) //
24 // AliESDpid *extPID=new AliESDpid(); //
25 // fTOFmaker = new AliTOFT0maker(extPID); //
26 // fTOFmaker->SetTimeResolution(100.0); // if you want set the TOF res //
27 // 115 ps is the TOF default resolution value //
29 // Use the RemakePID method in the task::Exec //
30 // Double_t* calcolot0; //
31 // calcolot0=fTOFmaker->RemakePID(fESD); //
32 // //calcolot0[0] = calculated event time //
33 // //calcolot0[1] = event time time resolution //
34 // //calcolot0[2] = average event time for the current fill //
35 // //calcolot0[3] = tracks at TOF //
36 // //calcolot0[4] = calculated event time (only TOF) //
37 // //calcolot0[5] = event time time resolution (only TOF) //
38 // //calcolot0[6] = sigma t0 fill //
39 // //calcolot0[7] = tracks at TOF really used in tht algorithm //
41 // Let consider that: //
42 // - the PIF is automatically recalculated with the event time subtrction //
44 /////////////////////////////////////////////////////////////////////////////
46 #include "AliTOFT0v1.h"
47 #include "AliTOFT0maker.h"
50 #include "AliESDpid.h"
51 #include "AliESDEvent.h"
54 #include "AliTOFcalib.h"
55 #include "AliTOFRunParams.h"
57 #include "AliTOFHeader.h"
59 ClassImp(AliTOFT0maker)
61 //____________________________________________________________________________
62 AliTOFT0maker::AliTOFT0maker():
66 fExternalPIDFlag(kFALSE),
84 if(AliPID::ParticleMass(0) == 0) new AliPID();
86 fPIDesd = new AliESDpid();
88 fNmomBins = fPIDesd->GetTOFResponse().GetNmomBins();
91 fT0TOF = new AliTOFT0v1(fPIDesd);
94 //____________________________________________________________________________
95 AliTOFT0maker::AliTOFT0maker(AliESDpid *externalPID, AliTOFcalib *tofCalib):
99 fExternalPIDFlag(kTRUE),
103 fTimeResolution(100),
117 if(AliPID::ParticleMass(0) == 0) new AliPID();
120 fPIDesd = new AliESDpid();
121 fExternalPIDFlag = kFALSE;
124 fNmomBins = fPIDesd->GetTOFResponse().GetNmomBins();
127 fT0TOF = new AliTOFT0v1(fPIDesd);
131 //____________________________________________________________________________
132 AliTOFT0maker::~AliTOFT0maker()
137 if (!fExternalPIDFlag) delete fPIDesd;
139 //____________________________________________________________________________
140 Double_t* AliTOFT0maker::ComputeT0TOF(AliESDEvent *esd,Double_t t0time,Double_t t0sigma){
142 // Remake TOF PID probabilities
147 if(fKmask) ApplyMask(esd);
149 Double_t t0fill = 0.;
151 fPIDesd->GetTOFResponse().ResetT0info();
153 /* get T0 spread from TOFcalib if available otherwise use default value */
154 if (fTOFcalib && esd) {
155 AliTOFRunParams *runParams = fTOFcalib->GetRunParams();
156 if (runParams && runParams->GetTimestamp(0) != 0) {
157 Float_t t0spread = runParams->EvalT0Spread(esd->GetTimeStamp());
158 if(fT0spreadExt > 0) SetT0FillWidth(fT0spreadExt);
160 SetT0FillWidth(t0spread);
165 if(fT0spreadExt > 0) SetT0FillWidth(fT0spreadExt);
170 Float_t thrGood = TMath::Max(Float_t(500.),fT0width*3);
173 AliTOFT0v1* t0maker= fT0TOF;
175 t0maker->DefineT0("all",1.5,3.0);
176 t0tof[0] = t0maker->GetResult(0);
177 t0tof[1] = t0maker->GetResult(1);
178 t0tof[2] = t0maker->GetResult(2);
179 t0tof[3] = t0maker->GetResult(3);
180 t0tof[4] = t0maker->GetResult(4);
181 t0tof[5] = t0maker->GetResult(5);
183 Float_t lT0Current=0.;
186 // Int_t nrun = esd->GetRunNumber();
190 Float_t sigmaFill = fT0width;
192 if(sigmaFill < 20) sigmaFill = 140;
194 fCalculated[0]=-1000*t0tof[0]; // best t0
195 fCalculated[1]=1000*t0tof[1]; // sigma best t0
196 fCalculated[2] = t0fill; //t0 fill
197 fCalculated[3] = t0tof[2]; // n TOF tracks
198 fCalculated[4]=-1000*t0tof[0]; // TOF t0
199 fCalculated[5]=1000*t0tof[1]; // TOF t0 sigma
200 fCalculated[6]=sigmaFill; // sigma t0 fill
201 fCalculated[7] = t0tof[3]; // n TOF tracks used for T0
203 if(fCalculated[7] > 30) thrGood = 10000000;
206 fCalculated[8] = t0tof[4]; // real time in s
207 fCalculated[9] = t0tof[5]; // cpu time in s
209 if(fCalculated[1] < sigmaFill && TMath::Abs(fCalculated[0] - t0fill) < thrGood && fCalculated[1] < fTimeResolution*1.2){
210 fT0sigma=fCalculated[1];
211 lT0Current=fCalculated[0];
214 fCalculated[4] = t0fill;
215 fCalculated[5] = sigmaFill;
218 if(fCalculated[1] < 1 || fT0sigma > sigmaFill || fCalculated[1] > fTimeResolution* 1.2){
220 fCalculated[4] = t0fill;
221 fCalculated[5] = sigmaFill;
226 Double_t w1 = 1./t0sigma/t0sigma;
227 Double_t w2 = 1./fCalculated[1]/fCalculated[1];
229 Double_t wtot = w1+w2;
231 lT0Current = (w1*t0time + w2*fCalculated[0]) / wtot;
232 fT0sigma = TMath::Sqrt(1./wtot);
240 if(fT0sigma < sigmaFill && TMath::Abs(lT0Current - t0fill) < thrGood){
241 fCalculated[1]=fT0sigma;
242 fCalculated[0]=lT0Current;
245 if(fT0sigma >= 1000 || fNoTOFT0){
247 fT0sigma = sigmaFill;
249 fCalculated[0] = t0fill;
250 fCalculated[1] = sigmaFill;
254 if(fCalculated[7] < 100){
255 for(Int_t i=0;i<fNmomBins;i++){
256 t0maker->DefineT0("all",fPIDesd->GetTOFResponse().GetMinMom(i),fPIDesd->GetTOFResponse().GetMaxMom(i));
257 t0tof[0] = t0maker->GetResult(0);
258 t0tof[1] = t0maker->GetResult(1);
259 t0tof[2] = t0maker->GetResult(2);
260 t0tof[3] = t0maker->GetResult(3);
263 Float_t t0bin =-1000*t0tof[0]; // best t0
264 Float_t t0binRes =1000*t0tof[1]; // sigma best t0
266 if(t0binRes < sigmaFill && t0binRes < fTimeResolution * 1.2 && TMath::Abs(t0bin - t0fill) < thrGood){
269 Double_t w1 = 1./t0sigma/t0sigma;
270 Double_t w2 = 1./t0binRes/t0binRes;
272 Double_t wtot = w1+w2;
274 t0bin = (w1*t0time + w2*t0bin) / wtot;
275 t0binRes = TMath::Sqrt(1./wtot);
280 t0binRes = sigmaFill;
286 fPIDesd->GetTOFResponse().SetT0bin(i,t0bin);
287 fPIDesd->GetTOFResponse().SetT0binRes(i,t0binRes);
291 for(Int_t i=0;i<fNmomBins;i++){
292 fPIDesd->GetTOFResponse().SetT0bin(i,lT0Current);
293 fPIDesd->GetTOFResponse().SetT0binRes(i,fT0sigma);
299 //____________________________________________________________________________
300 Double_t *AliTOFT0maker::GetT0p(Float_t p){// [0]=to -- [1] = sigma T0
301 Int_t i=fPIDesd->GetTOFResponse().GetMomBin(p);
303 fT0cur[0] = fPIDesd->GetTOFResponse().GetT0bin(i);
304 fT0cur[1] = fPIDesd->GetTOFResponse().GetT0binRes(i);
308 //____________________________________________________________________________
309 void AliTOFT0maker::SetTOFResponse(){
310 fPIDesd->GetTOFResponse().SetTimeResolution(fTimeResolution);
312 //____________________________________________________________________________
313 Float_t AliTOFT0maker::GetExpectedSigma(Float_t mom, Float_t tof, Float_t mass){
314 Float_t sigma = fPIDesd->GetTOFResponse().GetExpectedSigma(mom,tof,mass);
318 //____________________________________________________________________________
319 void AliTOFT0maker::ApplyT0TOF(AliESDEvent *esd){
321 // Recalculate TOF PID probabilities
324 // subtruct t0 for each track
325 Int_t ntracks = esd->GetNumberOfTracks();
328 AliESDtrack *t=esd->GetTrack(ntracks);
330 if ((t->GetStatus()&AliESDtrack::kTOFout)==0) continue;
332 Double_t time=t->GetTOFsignal();
333 Float_t p = t->GetP();
335 Double_t *t0=GetT0p(p);
337 t->SetTOFsignal(time);
340 for(Int_t i=0;i<fNmomBins;i++){
341 fPIDesd->GetTOFResponse().SetT0bin(i,0.0);
346 //____________________________________________________________________________
347 void AliTOFT0maker::LoadChannelMap(char *filename){
348 // Load the histo with the channel off map
349 TFile *f= new TFile(filename);
351 printf("Cannot open the channel map file (%s)\n",filename);
355 fHmapChannel = (TH1F *) f->Get("hChEnabled");
358 printf("Cannot laod the channel map histo (from %s)\n",filename);
363 //____________________________________________________________________________
364 void AliTOFT0maker::ApplyMask(AliESDEvent * const esd){
365 // Switch off the disable channel
367 printf("Channel Map is not available\n");
371 Int_t ntracks = esd->GetNumberOfTracks();
374 AliESDtrack *t=esd->GetTrack(ntracks);
376 if ((t->GetStatus()&AliESDtrack::kTOFout)==0) continue;
378 Int_t chan = t->GetTOFCalChannel();
380 if(fHmapChannel->GetBinContent(chan) < 0.01){
381 t->ResetStatus(AliESDtrack::kTOFout);
387 AliTOFT0maker::TuneForMC(AliESDEvent *esd){ // return true T0 event
392 Float_t TOFtimeResolutionDefault=80;
394 Float_t t0 = gRandom->Gaus(0.,fT0width);
396 Float_t extraSmearing = 0;
398 if(fTimeResolution > TOFtimeResolutionDefault){
399 extraSmearing = TMath::Sqrt(fTimeResolution*fTimeResolution - TOFtimeResolutionDefault*TOFtimeResolutionDefault);
402 // subtruct t0 for each track
403 Int_t ntracks = esd->GetNumberOfTracks();
406 AliESDtrack *t=esd->GetTrack(ntracks);
408 if ((t->GetStatus()&AliESDtrack::kTOFout)==0) continue;
410 /* check if channel is enabled */
411 if (fTOFcalib && !fTOFcalib->IsChannelEnabled(t->GetTOFCalChannel())) {
412 /* reset TOF status */
413 t->ResetStatus(AliESDtrack::kTOFin);
414 t->ResetStatus(AliESDtrack::kTOFout);
415 t->ResetStatus(AliESDtrack::kTOFmismatch);
416 t->ResetStatus(AliESDtrack::kTOFpid);
419 Double_t time=t->GetTOFsignal();
424 Float_t smearing = gRandom->Gaus(0.,extraSmearing);
428 t->SetTOFsignal(time);
433 //_________________________________________________________________________
434 void AliTOFT0maker::WriteInESD(AliESDEvent *esd){
436 // Write t0Gen, t0ResGen, nt0;
437 // t0resESD[0:nt0], it0ESD[0:nt0]
438 // in the AliESDEvent
440 Int_t nMomBins = fPIDesd->GetTOFResponse().GetNmomBins();
443 Float_t *t0 = new Float_t[nMomBins];
444 Float_t *t0res = new Float_t[nMomBins];
445 Int_t *multT0 = new Int_t[nMomBins];
447 for(Int_t i=0;i<nMomBins;i++){
448 // printf("START %i) %f %f\n",i,fT0event[i],fT0resolution[i]);
451 for(Int_t j=0;j < nt0;j++){
452 if(TMath::Abs(fPIDesd->GetTOFResponse().GetT0bin(i) - t0[j])<0.1){
459 t0[nt0]=fPIDesd->GetTOFResponse().GetT0bin(i);
460 t0res[nt0]=fPIDesd->GetTOFResponse().GetT0binRes(i);
465 Int_t iMultT0=0,nmult=0;
466 for(Int_t j=0;j < nt0;j++){ // find the most frequent
467 if(multT0[j] > nmult){
473 Float_t *t0ESD = new Float_t[nMomBins];
474 Float_t *t0resESD = new Float_t[nMomBins];
475 Int_t *it0ESD = new Int_t[nMomBins];
477 Float_t t0Gen,t0ResGen;
479 t0ResGen = t0res[iMultT0];
481 // printf("T0 to ESD\n%f %f\n",t0Gen,t0ResGen);
482 for(Int_t i=0;i<nMomBins;i++){
483 if(TMath::Abs(fPIDesd->GetTOFResponse().GetT0bin(i) - t0Gen)>0.1){
484 t0ESD[nt0]=fPIDesd->GetTOFResponse().GetT0bin(i);
485 t0resESD[nt0]=fPIDesd->GetTOFResponse().GetT0binRes(i);
487 // printf("%i) %f %f %i\n",nt0,t0ESD[nt0],t0resESD[nt0],it0ESD[nt0]);
492 // Write t0Gen,t0ResGen; nt0; t0resESD[0:nt0],it0ESD[0:nt0] in the AliESDEvent
494 AliTOFHeader *tofHeader =
495 new AliTOFHeader(t0Gen,t0ResGen,nt0,
496 t0ESD,t0resESD,it0ESD,fTimeResolution,fT0width);
498 esd->SetTOFHeader(tofHeader);
500 AliDebug(1,Form("resTOF=%f T0spread=%f t0Gen=%f t0resGen=%f",fTimeResolution,fT0width,t0Gen,t0ResGen));
501 AliDebug(1,Form("%d ",nt0));
502 for (Int_t ii=0; ii<nt0; ii++)
503 AliDebug(1,Form("pBin=%d t0val=%f t0res=%f",it0ESD[ii],t0ESD[ii],t0resESD[ii]));