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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 /* $Id$ */
17
18 ///////////////////////////////////////////////////////////////////////////////
19 //                                                                           //
20 // class for T0 calibration                       TM-AC-AM_6-02-2006  
21 // equalize time shift for each time CFD channel
22 //                                                                           //
23 ///////////////////////////////////////////////////////////////////////////////
24
25 #include "AliT0CalibTimeEq.h"
26 #include "AliLog.h"
27 #include <TFile.h>
28 #include <TMath.h>
29 #include <TF1.h>
30 #include <TSpectrum.h>
31 #include <TProfile.h>
32 #include <iostream>
33
34 ClassImp(AliT0CalibTimeEq)
35
36 //________________________________________________________________
37   AliT0CalibTimeEq::AliT0CalibTimeEq():TNamed(),
38                                        fMeanVertex(0),        
39                                        fRmsVertex(0)      
40 {
41   //
42
43 }
44
45 //________________________________________________________________
46 AliT0CalibTimeEq::AliT0CalibTimeEq(const char* name):TNamed(),
47                                        fMeanVertex(0),        
48                                        fRmsVertex(0)      
49 {
50   //constructor
51
52   TString namst = "Calib_";
53   namst += name;
54   SetName(namst.Data());
55   SetTitle(namst.Data());
56 }
57
58 //________________________________________________________________
59 AliT0CalibTimeEq::AliT0CalibTimeEq(const AliT0CalibTimeEq& calibda):TNamed(calibda),            
60                                        fMeanVertex(0),        
61                                        fRmsVertex(0)      
62 {
63 // copy constructor
64   SetName(calibda.GetName());
65   SetTitle(calibda.GetName());
66
67
68 }
69
70 //________________________________________________________________
71 AliT0CalibTimeEq &AliT0CalibTimeEq::operator =(const AliT0CalibTimeEq& calibda)
72 {
73 // assignment operator
74   SetName(calibda.GetName());
75   SetTitle(calibda.GetName());
76  
77   return *this;
78 }
79
80 //________________________________________________________________
81 AliT0CalibTimeEq::~AliT0CalibTimeEq()
82 {
83   //
84   // destrictor
85 }
86 //________________________________________________________________
87 void AliT0CalibTimeEq::Reset()
88 {
89   //reset values
90
91   memset(fCFDvalue,0,120*sizeof(Float_t));
92   memset(fTimeEq,1,24*sizeof(Float_t));
93 }
94
95
96 //________________________________________________________________
97 void  AliT0CalibTimeEq::Print(Option_t*) const
98 {
99   // print time values
100
101   printf("\n    ----    PM Arrays       ----\n\n");
102   printf(" Time delay CFD \n");
103   for (Int_t i=0; i<24; i++) printf(" CFD  %f ",fTimeEq[i]);
104   printf("\n Mean Vertex %f \n", fMeanVertex);
105
106
107
108 //________________________________________________________________
109 Bool_t AliT0CalibTimeEq::ComputeOnlineParams(const char* filePhys)
110 {
111   // compute online equalized time
112   Float_t meandiff, sigmadiff, meanver, meancfdtime, sigmacfdtime;
113   meandiff = sigmadiff =  meanver = meancfdtime = sigmacfdtime =0;
114     // Double_t rms=0, rmscfd=0; 
115   Double_t rmsver=0;
116  Int_t nent=0;
117   Bool_t ok=false;
118   gFile = TFile::Open(filePhys);
119   if(!gFile) {
120     AliError("No input PHYS data found ");
121   }
122   else
123     {
124       //    gFile->ls();
125       ok=true;
126       for (Int_t i=0; i<24; i++)
127         {
128           TH1F *cfd = (TH1F*) gFile->Get(Form("CFD1minCFD%d",i+1));
129           TH1F *cfdtime = (TH1F*) gFile->Get(Form("CFD%d",i+1));
130           if(!cfd) AliWarning(Form("no histograms collected by PHYS DA for channel %i", i));
131           //      printf(" i = %d buf1 = %s\n", i, buf1);
132           if(cfd) {
133             GetMeanAndSigma(cfd, meandiff, sigmadiff);
134             nent = Int_t(cfd->GetEntries());
135             if(nent<500 || cfd->GetRMS()>20. ) {
136               ok=false;
137               AliWarning(Form("Data is not good enouph in PMT %i - mean %f rsm %f nentries %i", i,meandiff,sigmadiff , nent));
138               
139             }
140             else 
141               {
142                 ok=false;
143                 AliWarning(Form("Data is not good enouph in PMT %i , no clean peak", i));
144               }
145             if(!cfd) AliWarning(Form("no histograms collected by PHYS DA for channel %i", i));
146           }
147             //      printf(" i = %d buf1 = %s\n", i, buf1);
148           if(cfdtime) {
149             GetMeanAndSigma(cfdtime,meancfdtime, sigmacfdtime);
150             nent = Int_t(cfdtime->GetEntries());
151             if(nent<500 || sigmacfdtime>30. ) {
152               ok=false;
153               AliWarning(Form("Data is not good enouph in PMT %i CFD data - meancfdtime %f rsm %f nentries %i", i,meancfdtime, sigmacfdtime, nent));
154                 
155             }
156           }
157           else 
158             {
159                 ok=false;
160                 AliWarning(Form("Data is not good enouph in PMT %i , no clean peak", i));
161               }
162           
163           
164         
165           SetTimeEq(i,meandiff);
166           SetTimeEqRms(i,sigmadiff);
167           SetCFDvalue(i,0,meancfdtime);
168           SetCFDvalue(i,0,sigmacfdtime);
169           if (cfd) delete cfd;
170           if (cfdtime) delete cfdtime;
171
172         }
173       TH1F *ver = (TH1F*) gFile->Get("hVertex");
174       if(!ver) AliWarning("no T0 histogram collected by PHYS DA ");
175       if(ver) {
176         meanver = ver->GetMean();
177         rmsver = ver->GetRMS();
178       }
179       SetMeanVertex(meanver);
180       SetRmsVertex(rmsver);
181       
182       gFile->Close();
183       delete gFile;
184
185     }
186     return ok; 
187 }
188
189 //________________________________________________________________
190 Bool_t AliT0CalibTimeEq::ComputeOfflineParams(const char* filePhys)
191 {
192   // compute online equalized time
193   Float_t meandiff, sigmadiff, meanver, meancfdtime, sigmacfdtime;
194   meandiff = sigmadiff =  meanver = meancfdtime = sigmacfdtime =0;
195   // Double_t rms=0, rmscfd=0; 
196   Double_t rmsver=0;
197   Int_t nent=0;
198   Bool_t ok=false;
199   gFile = TFile::Open(filePhys);
200   if(!gFile) {
201     AliError("No input PHYS data found ");
202   }
203   else
204     {
205       //    gFile->ls();
206       ok=true;
207       TObjArray * TzeroObj = (TObjArray*) gFile->Get("fTzeroObject");
208       for (Int_t i=0; i<24; i++)
209         {
210           TH1F *cfddiff = (TH1F*)TzeroObj->At(i);
211           TH1F *cfdtime = (TH1F*)TzeroObj->At(i+24);
212           if(!cfddiff) AliWarning(Form("no histograms collected by PHYS DA for channel %i", i));
213           //      printf(" i = %d buf1 = %s\n", i, buf1);
214           if(cfddiff) {
215             GetMeanAndSigma(cfddiff,meandiff, sigmadiff);
216             nent = Int_t(cfddiff->GetEntries());
217             if(nent<500 || cfddiff->GetRMS()>20. ) {
218               ok=false;
219               AliWarning(Form("Data is not good enouph in PMT %i - mean %f rsm %f nentries %i", i,meandiff,sigmadiff, nent));
220                       
221             }
222             else 
223               {
224                 ok=false;
225                 AliWarning(Form("Data is not good enouph in PMT %i , no clean peak", i));
226               }
227           if(!cfdtime) AliWarning(Form("no histograms collected by PHYS DA for channel %i", i));
228           //      printf(" i = %d buf1 = %s\n", i, buf1);
229           if(cfdtime) {
230             GetMeanAndSigma(cfdtime,meancfdtime, sigmacfdtime);
231             nent = Int_t(cfdtime->GetEntries());
232             if(nent<500 || cfdtime->GetRMS()>30. ) {
233               ok=false;
234               AliWarning(Form("Data is not good enouph in PMT %i CFD data - mean %f rsm %f nentries %i", i,meancfdtime, sigmacfdtime, nent));
235                 
236             }
237           }
238           else 
239             {
240                 ok=false;
241                 AliWarning(Form("Data is not good enouph in PMT %i , no clean peak", i));
242               }
243           }
244           
245         
246           SetTimeEq(i,meandiff);
247           SetTimeEqRms(i,sigmadiff);
248           SetCFDvalue(i,0,meancfdtime);
249           SetCFDvalue(i,0,sigmacfdtime);
250           if (cfddiff) delete cfddiff;
251           if (cfdtime) delete cfdtime;
252
253         }
254       TH1F *ver = (TH1F*) gFile->Get("hVertex");
255       if(!ver) AliWarning("no T0 histogram collected by PHYS DA ");
256       if(ver) {
257         meanver = ver->GetMean();
258         rmsver = ver->GetRMS();
259       }
260       SetMeanVertex(meanver);
261       SetRmsVertex(rmsver);
262       
263       gFile->Close();
264       delete gFile;
265
266     }
267     return ok; 
268 }
269
270 //________________________________________________________________________
271 void AliT0CalibTimeEq::GetMeanAndSigma(TH1F* hist,  Float_t &mean, Float_t &sigma) {
272
273   const double window = 5.;  //fit window 
274   double norm  = hist->Integral();  // normalize to one count
275   hist->Scale(1./norm); 
276  
277   double meanEstimate, sigmaEstimate; 
278   int maxBin;
279   maxBin        =  hist->GetMaximumBin(); //position of maximum
280   meanEstimate  =  hist->GetBinCenter( maxBin); // mean of gaussian sitting in maximum
281   sigmaEstimate = hist->GetRMS();
282   TF1* fit= new TF1("fit","gaus", meanEstimate - window*sigmaEstimate, meanEstimate + window*sigmaEstimate);
283   fit->SetParameters(hist->GetBinContent(maxBin), meanEstimate, sigmaEstimate);
284   hist->Fit("fit","R");
285
286   mean  = (Float_t) fit->GetParameter(1);
287   sigma = (Float_t) fit->GetParameter(2);
288
289   delete fit;
290 }
291
292