correct calibration of short runs
[u/mrichter/AliRoot.git] / T0 / AliT0CalibWalk.cxx
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 ///////////////////////////////////////////////////////////////////////////////
19 //                                                                           //
20 // class T0 walk correction      Alla Maevskaya alla@inr.ru 20.11.2007        //
21 //                                                                           //
22 ///////////////////////////////////////////////////////////////////////////////
23
24 #include "AliT0CalibWalk.h"
25 #include "AliLog.h"
26
27 #include <TObjArray.h>
28 #include <TGraph.h>
29 #include <TFile.h>
30 #include <TH2F.h> 
31 #include <TMath.h>
32 #include <TSystem.h>
33 #include <Riostream.h>
34 #include <TSpectrum.h>
35 #include <TProfile.h>
36 #include <TF1.h>
37
38 ClassImp(AliT0CalibWalk)
39
40 //________________________________________________________________
41   AliT0CalibWalk::AliT0CalibWalk():   TNamed(),
42                                       fWalk(0),
43                                       fAmpLEDRec(0),
44                                       fQTC(0),
45                                       fAmpLED(0)
46 {
47   //
48 }
49
50 //________________________________________________________________
51 AliT0CalibWalk::AliT0CalibWalk(const char* name):TNamed(),
52                                       fWalk(0),
53                                       fAmpLEDRec(0),                                                                  fQTC(0),
54                                       fAmpLED(0)
55     
56 {
57   TString namst = "Calib_";
58   namst += name;
59   SetName(namst.Data());
60   SetTitle(namst.Data());
61
62 }
63
64 //________________________________________________________________
65 AliT0CalibWalk::AliT0CalibWalk(const AliT0CalibWalk& calibda) :
66   TNamed(calibda),              
67   fWalk(0),
68   fAmpLEDRec(0),
69   fQTC(0),
70   fAmpLED(0)
71  
72 {
73 // copy constructor
74   SetName(calibda.GetName());
75   SetTitle(calibda.GetName());
76
77
78 }
79
80 //________________________________________________________________
81 AliT0CalibWalk &AliT0CalibWalk::operator =(const AliT0CalibWalk& calibda)
82 {
83 // assignment operator
84   SetName(calibda.GetName());
85   SetTitle(calibda.GetName());
86  
87   return *this;
88 }
89
90 //________________________________________________________________
91 AliT0CalibWalk::~AliT0CalibWalk()
92 {
93   //
94 }
95 //________________________________________________________________  
96
97 Bool_t AliT0CalibWalk::MakeWalkCorrGraph(const char *laserFile)
98 {
99   //make walk corerction for preprocessor
100   Float_t sigma,cfdmean, qtmean, ledmean;
101   Bool_t ok=true;
102   Float_t   mips[50];
103   
104   gFile = TFile::Open(laserFile);
105   if(!gFile) {
106     AliError("No input laser data found ");
107   }
108   else
109     {
110       //      gFile->ls();
111       TH1F* hAmp = (TH1F*) gFile->Get("hAmpLaser");
112       Int_t nmips=0;
113       for (Int_t ibin=0; ibin<2000; ibin++) {
114         Float_t bincont = hAmp->GetBinContent(ibin);
115         if(bincont>0){ 
116           mips[nmips] = hAmp->GetXaxis()->GetBinCenter(ibin);
117           cout<<ibin<<" bincont "<<bincont<<" amp "<< mips[nmips]<<endl;
118           nmips++;
119         }       
120       }    
121       
122       if (nmips<17) {
123         ok=false;
124         return ok;
125       } 
126        
127       Float_t x1[50], y1[50]; 
128       Float_t x2[50], xx2[50],y2[50];
129       Float_t xx1[50],yy1[50], xx[50];
130       
131       Float_t cfd0 = 0;
132       
133       for (Int_t ii=0; ii<nmips; ii++)
134         x1[ii] = y1[ii] = x2[ii] = y2[ii] = 0; 
135       
136       for (Int_t i=0; i<24; i++)
137         {
138           cfd0 = 0;
139           for (Int_t im=0; im<nmips; im++)
140             {         
141               TString cfd = Form("hCFD%i_%i",i+1,im+1);
142               TString qtc = Form("hQTC%i_%i",i+1,im+1);
143               TString led = Form("hLED%i_%i",i+1,im+1);
144               
145               TH1F *hCFD = (TH1F*) gFile->Get(cfd.Data()) ;
146               TH1F *hLED = (TH1F*) gFile->Get(led.Data());
147               TH1F *hQTC = (TH1F*) gFile->Get(qtc.Data()) ;
148               //              hCFD->SetDirectory(0);
149               //              hQTC->SetDirectory(0);
150               //              hLED->SetDirectory(0);
151               if(!hCFD )
152                 AliWarning(Form(" no CFD data in LASER DA for channel %i for amplitude %f MIPs",i,mips[im]));
153               if(!hQTC )
154                 AliWarning(Form(" no QTC correction data in LASER DA for channel %i for amplitude %f MIPs",i,mips[im]));
155               if(!hLED)       
156                 AliWarning(Form(" no LED correction data in LASER DA for channel %i for amplitude %f MIPs",i,mips[im]));
157               if( hCFD && hCFD->GetEntries()<500 ) {
158                 ok=false;
159                 printf("no peak in CFD spectrum for PMT %i amplitude %i\n",i,im);
160                 return ok;
161               }
162               if(hCFD && hCFD->GetEntries()>500 ) {
163                 if( hCFD->GetRMS() >= 1.5) 
164                   GetMeanAndSigma(hCFD, cfdmean, sigma);
165                 else
166                   cfdmean = hCFD->GetMean();
167                 
168                 Int_t   maxBin = hCFD->GetMaximumBin(); 
169                 Double_t  meanEstimate = hCFD->GetBinCenter( maxBin); 
170                 if(TMath::Abs(meanEstimate - cfdmean) > 20 ) cfdmean = meanEstimate; 
171                 if (im == 0) cfd0 = cfdmean;
172                 y1[im] =  cfdmean - cfd0;
173               } 
174               if(hQTC && hQTC->GetEntries()>500) {
175                 GetMeanAndSigma(hQTC, qtmean, sigma);
176                 
177                 x1[im] = qtmean;
178                 if( x1[im] == 0) {
179                   ok=false;
180                   printf("no peak in QTC signal for PMT %i amplitude %i\n",i,im);
181                   return ok;
182                 }
183               }
184                 
185               if( hLED && hLED->GetEntries()>500) {
186                 GetMeanAndSigma(hLED, ledmean, sigma);
187               }                            
188               else
189                 { 
190                   ok=false;
191                   printf("no peak in LED spectrum for PMT %i amplitude %i\n",i,im);
192                   return ok;
193                 }
194               x2[im] = ledmean;
195               xx2[im] = x2[nmips-im-1];
196                 
197                 xx[im]=mips[im];
198                 if (hQTC) delete  hQTC;
199                 if (hCFD) delete  hCFD;
200                 if (hLED) delete  hLED;
201                 
202             }
203           
204           for (Int_t imi=0; imi<nmips; imi++)
205             {
206               yy1[imi] = Float_t (mips[nmips-imi-1]);
207               xx1[imi] = x2[nmips-imi-1]; 
208               //              cout<<" LED rev "<<i<<" "<<imi<<" "<<xx1[imi]<<" "<< yy1[imi]<<"nmips-imi-1 = "<< nmips-imi-1<<endl;
209             }
210           
211           if(i==0) cout<<"Making graphs..."<<endl;
212           
213       TGraph *grwalkqtc = new TGraph (nmips,x1,y1);
214       grwalkqtc->SetTitle(Form("PMT%i",i));
215       TGraph *grwalkled = new TGraph (nmips,x2,y1);
216       grwalkled->SetTitle(Form("PMT%i",i));
217       fWalk.AddAtAndExpand(grwalkqtc,i);
218       fAmpLEDRec.AddAtAndExpand(grwalkled,i);
219       //          cout<<" add walk "<<i<<endl;
220       
221       //fit amplitude graphs to make comparison wth new one       
222       TGraph *grampled = new TGraph (nmips,xx1,yy1);
223       TGraph *grqtc = new TGraph (nmips,x1,xx);
224       fQTC.AddAtAndExpand(grqtc,i);      
225       fAmpLED.AddAtAndExpand(grampled,i);
226       //          cout<<" add amp "<<i<<endl;
227       
228       if(i==23)
229         cout<<"Graphs created..."<<endl;
230         }
231     } //if gFile exits
232
233   return ok;
234 }
235
236 void AliT0CalibWalk::GetMeanAndSigma(TH1F* hist, Float_t &mean, Float_t &sigma) 
237 {
238
239   const double window = 2.;  //fit window 
240  
241   double meanEstimate, sigmaEstimate; 
242   int maxBin;
243   maxBin        =  hist->GetMaximumBin(); //position of maximum
244   meanEstimate  =  hist->GetBinCenter( maxBin); // mean of gaussian sitting in maximum
245   sigmaEstimate = hist->GetRMS();
246   TF1* fit= new TF1("fit","gaus", meanEstimate - window*sigmaEstimate, meanEstimate + window*sigmaEstimate);
247   fit->SetParameters(hist->GetBinContent(maxBin), meanEstimate, sigmaEstimate);
248   hist->Fit("fit","RQ","Q");
249
250   mean  = (Float_t) fit->GetParameter(1);
251   sigma = (Float_t) fit->GetParameter(2);
252
253   delete fit;
254 }
255
256
257