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[u/mrichter/AliRoot.git] / T0 / AliT0Reconstructor.cxx
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dc7ca31d 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/* $Id$ */
17
18#include <Riostream.h>
19
20#include <TDirectory.h>
21
22#include "AliRunLoader.h"
23#include "AliRun.h"
24#include <AliESD.h>
25#include "AliLog.h"
26#include <TClonesArray.h>
27#include "AliT0RecPoint.h"
28#include "AliRawReader.h"
29#include "AliT0RawReader.h"
30#include "AliT0Loader.h"
31#include "AliT0digit.h"
32#include "AliT0Reconstructor.h"
33#include "AliT0Parameters.h"
34#include "AliCDBLocal.h"
35#include "AliCDBStorage.h"
36#include "AliCDBManager.h"
37#include "AliCDBEntry.h"
38
39#include <TArrayI.h>
40#include <TGraph.h>
41
42ClassImp(AliT0Reconstructor)
43
44 void AliT0Reconstructor::ConvertDigits(AliRawReader* rawReader, TTree* digitsTree) const
45{
46 //T0 raw data-> digits conversion
47 // reconstruct time information from raw data
48 AliT0RawReader myrawreader(rawReader,digitsTree);
49 if (!myrawreader.Next())
50 AliDebug(1,Form(" no raw data found!! %i", myrawreader.Next()));
51}
52void AliT0Reconstructor::Reconstruct(TTree*digitsTree, TTree*clustersTree) const
53{
54// T0 digits reconstruction
55// T0RecPoint writing
56
57 //Q->T-> coefficients !!!! should be asked!!!
58 // Float_t ph2MIP=500;
59 Float_t gain[24], timeDelayCFD[24], timeDelayLED[24];
60 Float_t zdetA,zdetC;
61 TObjArray slewingLED;
62
63 TArrayI * fADC = new TArrayI(24);
64 TArrayI * fTimeCFD = new TArrayI(24);
65 TArrayI * fADCLED = new TArrayI(24);
66 TArrayI * fTimeLED = new TArrayI(24);
67
68 AliT0Parameters* param = AliT0Parameters::Instance();
69 param->Init();
70
71 Int_t mV2Mip = param->GetmV2Mip();
72 //mV2Mip = param->GetmV2Mip();
73 Int_t channelWidth = param->GetChannelWidth() ;
74
75 for (Int_t i=0; i<24; i++){
76 timeDelayCFD[i] = param->GetTimeDelayCFD(i);
77 timeDelayLED[i] = param->GetTimeDelayLED(i);
78 gain[i] = param->GetGain(i);
79 //gain[i] = 1;
80 slewingLED.AddAtAndExpand(param->GetSlew(i),i);
81 }
82 zdetC = param->GetZposition(0);
83 zdetA = param->GetZposition(1);
84
85 AliDebug(1,Form("Start DIGITS reconstruction "));
86
87 TBranch *brDigits=digitsTree->GetBranch("T0");
88 AliT0digit *fDigits = new AliT0digit();
89 if (brDigits) {
90 brDigits->SetAddress(&fDigits);
91 }else{
92 cerr<<"EXEC Branch T0 digits not found"<<endl;
93 return;
94 }
95 brDigits->GetEntry(0);
96 fDigits->GetTime(*fTimeCFD);
97 fDigits->GetADC(*fADC);
98 fDigits->GetTimeAmp(*fTimeLED);
99 fDigits->GetADCAmp(*fADCLED);
100
101 Float_t besttimeright=999999;
102 Float_t besttimeleft=999999;
103 Int_t pmtBestRight=99999;
104 Int_t pmtBestLeft=99999;
105 Float_t timeDiff=999999, meanTime=0;
106
107 AliT0RecPoint* frecpoints= new AliT0RecPoint ();
108 clustersTree->Branch( "T0", "AliT0RecPoint" ,&frecpoints, 405,1);
109
110 Float_t time[24], adc[24];
111 for (Int_t ipmt=0; ipmt<24; ipmt++) {
112
113 if(fTimeCFD->At(ipmt)>0 ){
114 time[ipmt] = channelWidth *( fTimeCFD->At(ipmt)) - 1000*timeDelayCFD[ipmt];
115 Float_t adc_digPs = channelWidth * Float_t (fADCLED->At(ipmt)) ;
116 adc[ipmt] = TMath::Exp(adc_digPs/1000) /gain[ipmt];
117 AliDebug(1,Form(" time %f ps, adc %f mv in MIP %i\n ",
118 time[ipmt], adc[ipmt], Int_t (adc[ipmt]/mV2Mip +0.5)));
119 frecpoints->SetTime(ipmt,time[ipmt]);
120 frecpoints->SetAmp(ipmt,adc[ipmt]);
121 }
122 else {
123 time[ipmt] = 0;
124 adc[ipmt] = 0;
125 }
126 }
127 for (Int_t ipmt=0; ipmt<12; ipmt++){
128 if(time[ipmt] > 1 ) {
129 if(time[ipmt]<besttimeleft){
130 besttimeleft=time[ipmt]; //timeleft
131 pmtBestLeft=ipmt;
132 }
133 }
134 }
135 for ( Int_t ipmt=12; ipmt<24; ipmt++){
136 if(time[ipmt] > 1) {
137 if(time[ipmt]<besttimeright) {
138 besttimeright=time[ipmt]; //timeright
139 pmtBestRight=ipmt;}
140 }
141 }
142 if(besttimeright !=999999) frecpoints->SetTimeBestRight(Int_t(besttimeright));
143 if( besttimeleft != 999999 ) frecpoints->SetTimeBestLeft(Int_t(besttimeleft));
144 AliDebug(1,Form(" besttimeA %f ps, besttimeC %f ps",besttimeright, besttimeleft));
145 Float_t c = 0.0299792; // cm/ps
146 Float_t vertex = 0;
147 if(besttimeright !=999999 && besttimeleft != 999999 ){
148 timeDiff = besttimeleft - besttimeright;
149 meanTime = (besttimeright + besttimeleft)/2.;
150 vertex = c*(timeDiff)/2.; //-(lenr-lenl))/2;
151 AliDebug(1,Form(" timeDiff %f ps, meanTime %f ps, vertex %f cm",timeDiff, meanTime,vertex ));
152 frecpoints->SetVertex(vertex);
153 frecpoints->SetMeanTime(Int_t(meanTime));
154
155 }
156 clustersTree->Fill();
157}
158
159
160void AliT0Reconstructor::FillESD(AliRunLoader* runLoader, AliESD *pESD) const
161{
162
163 /***************************************************
164 Resonstruct digits to vertex position
165 ****************************************************/
166
167
168 if (!runLoader) {
169 AliError("Reconstruct >> No run loader");
170 return;
171 }
172
173 AliDebug(1,Form("Start FillESD T0"));
174
175 AliT0Loader* pStartLoader = (AliT0Loader*) runLoader->GetLoader("T0Loader");
176
177 pStartLoader->LoadRecPoints("READ");
178
179 TTree *treeR = pStartLoader->TreeR();
180
181 AliT0RecPoint* frecpoints= new AliT0RecPoint ();
182 if (!frecpoints) {
183 AliError("Reconstruct Fill ESD >> no recpoints found");
184 return;
185 }
186
187 AliDebug(1,Form("Start FillESD T0"));
188 TBranch *brRec = treeR->GetBranch("T0");
189 if (brRec) {
190 brRec->SetAddress(&frecpoints);
191 }else{
192 cerr<<"EXEC Branch T0 rec not found"<<endl;
193 // exit(111);
194 return;
195 }
196
197 brRec->GetEntry(0);
198 Float_t timeStart, Zposition, amp[24], time[24];
199 Int_t i;
200 Zposition = frecpoints -> GetVertex();
201 timeStart = frecpoints -> GetMeanTime();
202 for ( i=0; i<24; i++) {
203 time[i] = Float_t (frecpoints -> GetTime(i)) / 1000.; // ps to ns
204 amp[i] = frecpoints -> GetAmp(i);
205 }
206 pESD->SetT0zVertex(Zposition); //vertex Z position
207 pESD->SetT0(timeStart); // interaction time
208 pESD->SetT0time(time); // best TOF on each PMT
209 pESD->SetT0amplitude(amp); // number of particles(MIPs) on each PMT
210 cout<<" ESD >> "<<Zposition<<" "<<timeStart<<endl;
211
212 pStartLoader->UnloadRecPoints();
213
214} // vertex in 3 sigma
215
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