In the calculation of the jacobian use the transposed matrix instead of its inverse...
[u/mrichter/AliRoot.git] / HMPID / AliHMPIDPreprocessor.cxx
1 #include "AliHMPIDPreprocessor.h" //header no includes
2 #include "AliHMPIDDigit.h"        //ProcPed()
3 #include "AliHMPIDRawStream.h"    //ProcPed()
4 #include <Riostream.h>            //ProcPed()  
5 #include <AliLog.h>               //all
6 #include <AliCDBMetaData.h>       //ProcPed(), ProcDcs()
7 #include <AliDCSValue.h>          //ProcDcs()
8 #include <TObjString.h>           //ProcDcs(), ProcPed()
9 #include <TTimeStamp.h>           //Initialize()
10 #include <TF1.h>                  //Process()
11 #include <TF2.h>                  //Process()
12 #include <TString.h>
13 #include <TGraph.h>               //Process()
14 #include <TMatrix.h>              //ProcPed()
15 #include <TList.h>                //ProcPed()
16 #include <TSystem.h>              //ProcPed()
17 //.
18 // HMPID Preprocessor base class
19 //.
20 //.
21 //.
22 ClassImp(AliHMPIDPreprocessor)
23
24 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
25 void AliHMPIDPreprocessor::Initialize(Int_t run, UInt_t startTime,UInt_t endTime)
26 {
27 // Initialize the parameter coming from AliPreprocessor
28 //  run -> run number
29 // startTime -> starting time 
30 // endTime   -> ending time
31   AliPreprocessor::Initialize(run, startTime, endTime);
32   
33   AliInfo(Form("HMPID started for Run %d \n\tStartTime %s \n\t  EndTime %s", run,TTimeStamp(startTime).AsString(),TTimeStamp(endTime).AsString()));
34
35 }
36 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
37 UInt_t AliHMPIDPreprocessor::Process(TMap* pMap)
38 {
39 // Process all information from DCS and DAQ
40 // Arguments: pMap- map of DCS aliases
41 // Returns: 0 on success or 1 on error (opposite to Store!)
42
43   TString runType = GetRunType();
44   Log(Form(" AliHMPIDPreprocessor: RunType is %s",runType.Data()));
45   
46 // start to check event type and procedures
47   
48   Log("HMPID - Process in Preprocessor started");
49   if(! pMap) {
50     Log("HMPID - ERROR - Not map of DCS aliases for HMPID - ");             return kTRUE;   // error in the DCS mapped aliases
51   }   
52   if (runType == "CALIBRATION"){
53     if (!ProcPed()){
54         Log("HMPID - ERROR - Pedestal processing failed!!");                return kTRUE;   // error in pedestal processing
55     } else {
56         Log("HMPID - Pedestal processing successful!!");                    return kFALSE;  // ok for pedestals
57     }
58   } else if ( runType=="STANDALONE" || runType=="PHYSICS"){
59   if (!ProcDcs(pMap)){
60         Log("HMPID - ERROR - DCS processing failed!!");                     return kTRUE;   // error in DCS processing
61     } else {
62         Log("HMPID - DCS processing successful!!");                         return kFALSE;  // ok for DCS
63     }
64   } else {
65     Log("HMPID - Nothing to do with preprocessor for HMPID, bye!");         return kFALSE;  // ok - nothing done
66   }
67 }//Process()
68 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
69 Bool_t AliHMPIDPreprocessor::ProcDcs(TMap* pMap)
70 {
71 // Process: 1 (old). inlet and outlet C6F14 temperature, stores TObjArray of 21 TF1, where TF1 is Nmean=f(t), one per radiator
72 // Process: 1. inlet and outlet C6F14 temperature, stores TObjArray of 42 TF1, where TF1 are Tin and Tout per radiator
73 //             + one function for the mean energy photon (in total 43).
74 //          2. CH4 pressure and HV                 stores TObjArray of 7 TF1 where TF1 is thr=f(t), one per chamber
75 // Arguments: pDcsMap - map of structure "alias name" - TObjArray of AliDCSValue
76 // Assume that: HV is the same during the run for a given chamber, different chambers might have different HV
77 //              P=f(t), different for different chambers
78 // Returns: kTRUE on success  
79
80   Bool_t stDcsStore=kFALSE;
81
82 // Qthr=f(HV,P) [V,mBar]  logA0=k*HV+b is taken from p. 64 TDR plot 2.59 for PC32 
83 //                           A0=f(P) is taken from DiMauro mail
84 // Qthr is estimated as 3*A0
85
86   TF2 thr("RthrCH4"  ,"3*10^(3.01e-3*x-4.72)+170745848*exp(-y*0.0162012)"             ,2000,3000,900,1200); 
87   
88   TObjArray arNmean(43);       arNmean.SetOwner(kTRUE);     //42 Tin and Tout one per radiator + 1 for ePhotMean
89   TObjArray arQthre(42);       arQthre.SetOwner(kTRUE);     //42 Qthre=f(time) one per sector
90   
91   AliDCSValue *pVal; Int_t cnt=0;
92   
93   Double_t xP,yP;
94
95   TF1 **pTin  = new TF1*[21];
96   TF1 **pTout = new TF1*[21];
97
98 // evaluate Environment Pressure
99   
100   TObjArray *pPenv=(TObjArray*)pMap->GetValue("HMP_DET/HMP_ENV/HMP_ENV_PENV.actual.value");
101   if(!pPenv) {
102     AliWarning(" No Data Points from HMP_ENV_PENV.actual.value!");
103     return kFALSE;
104   } else {
105     Log(Form(" Environment Pressure data              ---> %3i entries",pPenv->GetEntries()));
106     if(pPenv->GetEntries()) {
107       TIter nextPenv(pPenv);
108       TGraph *pGrPenv=new TGraph; cnt=0;
109       while((pVal=(AliDCSValue*)nextPenv())) pGrPenv->SetPoint(cnt++,pVal->GetTimeStamp(),pVal->GetFloat());        //P env
110       if( cnt==1) {
111         pGrPenv->GetPoint(0,xP,yP);
112         new TF1("Penv",Form("%f",yP),fStartTime,fEndTime);
113       } else {
114         pGrPenv->Fit(new TF1("Penv","1000+x*[0]",fStartTime,fEndTime),"Q");
115       }
116       delete pGrPenv;
117     } else {AliWarning(" No Data Points from HMP_ENV_PENV.actual.value!");return kFALSE;}
118   }  
119 // evaluate Pressure
120   
121   for(Int_t iCh=0;iCh<7;iCh++){                   
122     TObjArray *pP =(TObjArray*)pMap->GetValue(Form("HMP_DET/HMP_MP%i/HMP_MP%i_GAS/HMP_MP%i_GAS_PMWPC.actual.value",iCh,iCh,iCh));
123     if(!pP) {
124       AliWarning(Form(" No Data Points from HMP_MP%1i_GAS_PMWPC.actual.value!",iCh));
125       return kFALSE;
126     } else {
127         Log(Form(" Pressure for module %i data             ---> %3i entries",iCh,pP->GetEntries()));
128       if(pP->GetEntries()) {
129         TIter nextP(pP);    
130         TGraph *pGrP=new TGraph; cnt=0; 
131         while((pVal=(AliDCSValue*)nextP())) pGrP->SetPoint(cnt++,pVal->GetTimeStamp(),pVal->GetFloat());            //P
132         if( cnt==1) {
133           pGrP->GetPoint(0,xP,yP);
134           new TF1(Form("P%i",iCh),Form("%f",yP),fStartTime,fEndTime);
135         } else {
136           pGrP->Fit(new TF1(Form("P%i",iCh),"[0] + x*[1]",fStartTime,fEndTime),"Q");
137         }
138         delete pGrP;
139       } else {AliWarning(" No Data Points from HMP_MP0-6_GAS_PMWPC.actual.value!");return kFALSE;}
140     }
141     
142 // evaluate High Voltage
143     
144     for(Int_t iSec=0;iSec<6;iSec++){
145       TObjArray *pHV=(TObjArray*)pMap->GetValue(Form("HMP_DET/HMP_MP%i/HMP_MP%i_PW/HMP_MP%i_SEC%i/HMP_MP%i_SEC%i_HV.actual.vMon",iCh,iCh,iCh,iSec,iCh,iSec));
146       if(!pHV) {
147         AliWarning(Form(" No Data Points from HMP_MP%1i_SEC%1i_HV.actual.vMon!",iCh,iSec));
148         return kFALSE;
149       } else {
150         Log(Form(" HV for module %i and secto %i data       ---> %3i entries",iCh,iSec,pHV->GetEntries()));
151         if(pHV->GetEntries()) {
152           TIter nextHV(pHV);
153           TGraph *pGrHV=new TGraph; cnt=0;
154           while((pVal=(AliDCSValue*)nextHV())) pGrHV->SetPoint(cnt++,pVal->GetTimeStamp(),pVal->GetFloat());            //HV
155           if( cnt==1) {
156             pGrHV->GetPoint(0,xP,yP);
157             new TF1(Form("HV%i_%i",iCh,iSec),Form("%f",yP),fStartTime,fEndTime);               
158           } else {
159             pGrHV->Fit(new TF1(Form("HV%i_%i",iCh,iSec),"[0]+x*[1]",fStartTime,fEndTime),"Q");               
160           }
161           delete pGrHV;
162         } else {AliWarning(" No Data Points from HMP_MP0-6_SEC0-5_HV.actual.vMon!");return kFALSE;}
163       }
164      
165 // evaluate Qthre
166      
167       arQthre.AddAt(new TF1(Form("HMP_QthreC%iS%i",iCh,iSec),
168           Form("3*10^(3.01e-3*HV%i_%i - 4.72)+170745848*exp(-(P%i+Penv)*0.0162012)",iCh,iSec,iCh),fStartTime,fEndTime),6*iCh+iSec);
169     }
170 // evaluate Temperatures: in and out of the radiators    
171     // T in
172     for(Int_t iRad=0;iRad<3;iRad++){
173       
174       pTin[3*iCh+iRad]  = new TF1(Form("Tin%i%i" ,iCh,iRad),"[0]+[1]*x",fStartTime,fEndTime);
175       pTout[3*iCh+iRad] = new TF1(Form("Tout%i%i",iCh,iRad),"[0]+[1]*x",fStartTime,fEndTime);          
176       
177       TObjArray *pT1=(TObjArray*)pMap->GetValue(Form("HMP_DET/HMP_MP%i/HMP_MP%i_LIQ_LOOP.actual.sensors.Rad%iIn_Temp",iCh,iCh,iRad));
178       if(!pT1) {
179         AliWarning(Form(" No Data Points from HMP_MP%1i_LIQ_LOOP.actual.sensors.Rad%1iIn_Temp!",iCh,iRad));
180         return kFALSE;
181       } else {
182         Log(Form(" Temperatures for module %i inside data  ---> %3i entries",iCh,pT1->GetEntries()));
183         if(pT1->GetEntries()) {
184           TIter nextT1(pT1);//Tin
185           TGraph *pGrT1=new TGraph; cnt=0;  while((pVal=(AliDCSValue*)nextT1())) pGrT1->SetPoint(cnt++,pVal->GetTimeStamp(),pVal->GetFloat()); //T inlet
186           if(cnt==1) { 
187             pGrT1->GetPoint(0,xP,yP);
188             pTin[3*iCh+iRad]->SetParameter(0,yP);
189             pTin[3*iCh+iRad]->SetParameter(1,0);
190           } else {
191             pGrT1->Fit(pTin[3*iCh+iRad],"Q");
192           }
193           delete pGrT1;
194         } else {AliWarning(" No Data Points from HMP_MP0-6_LIQ_LOOP.actual.sensors.Rad0-2In_Temp!");return kFALSE;}
195       }
196     // T out
197       TObjArray *pT2=(TObjArray*)pMap->GetValue(Form("HMP_DET/HMP_MP%i/HMP_MP%i_LIQ_LOOP.actual.sensors.Rad%iOut_Temp",iCh,iCh,iRad)); 
198       if(!pT2) {
199         AliWarning(Form(" No Data Points from HMP_MP%1i_LIQ_LOOP.actual.sensors.Rad%1iOut_Temp!",iCh,iRad));
200         return kFALSE;
201       } else {
202         Log(Form(" Temperatures for module %i outside data ---> %3i entries",iCh,pT2->GetEntries()));
203         if(pT2->GetEntries()) {
204           TIter nextT2(pT2);//Tout      
205           TGraph *pGrT2=new TGraph; cnt=0;  while((pVal=(AliDCSValue*)nextT2())) pGrT2->SetPoint(cnt++,pVal->GetTimeStamp(),pVal->GetFloat()); //T outlet 
206           if(cnt==1) { 
207             pGrT2->GetPoint(0,xP,yP);
208             pTout[3*iCh+iRad]->SetParameter(0,yP);
209             pTout[3*iCh+iRad]->SetParameter(1,0);
210           } else {
211             pGrT2->Fit(pTout[3*iCh+iRad],"Q");
212           }
213           delete pGrT2;
214         } else {AliWarning(" No Data Points from HMP_MP0-6_LIQ_LOOP.actual.sensors.Rad0-2Out_Temp!");return kFALSE;}
215       }
216         
217 // evaluate Mean Refractive Index
218       
219       arNmean.AddAt(pTin[3*iCh+iRad] ,6*iCh+2*iRad  ); //Tin =f(t)
220       arNmean.AddAt(pTout[3*iCh+iRad],6*iCh+2*iRad+1); //Tout=f(t)
221       
222     }//radiators loop
223   }//chambers loop
224   
225   Double_t eMean = ProcTrans(pMap);
226   arNmean.AddAt(new TF1("HMP_PhotEmean",Form("%f",eMean),fStartTime,fEndTime),42); //Photon energy mean
227     
228   AliCDBMetaData metaData; 
229   metaData.SetBeamPeriod(0); 
230   metaData.SetResponsible("AliHMPIDPreprocessor"); 
231   metaData.SetComment("HMPID preprocessor fills TObjArrays.");
232
233   stDcsStore =   Store("Calib","Qthre",&arQthre,&metaData,0,kTRUE) &&    // from DCS  0,kTRUE generates the file from Run 0 to Run 99999999
234                  Store("Calib","Nmean",&arNmean,&metaData,0,kTRUE);      // from DCS
235 //  stDcsStore =   Store("Calib","Qthre",&arQthre,&metaData) &&    // from DCS 
236 //                 Store("Calib","Nmean",&arNmean,&metaData);      // from DCS
237   if(!stDcsStore) {
238     Log("HMPID - failure to store DCS data results in OCDB");    
239   }
240   
241 //  arNmean.Delete();
242 //  arQthre.Delete();
243
244 //  for(Int_t i=0;i<21;i++) delete pTin[i]; delete []pTin;
245 //  for(Int_t i=0;i<21;i++) delete pTout[i]; delete []pTout;
246   
247   return stDcsStore;
248 }//Process()
249 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
250 Bool_t AliHMPIDPreprocessor::ProcPed()
251 {
252 // Process pedestal files and create 7 M(padx,pady)=sigma, one for each chamber
253 // Arguments:
254 // Returns: kTRUE on success
255   
256   Bool_t stPedStore=kFALSE;
257   AliHMPIDDigit dig;
258   AliHMPIDRawStream rs;
259   Int_t nSigCut,r,d,a,hard;  Float_t mean,sigma;
260   Int_t  runNumber,ldcId,timeStamp,nEv,nDdlEv,nBadEv;  Char_t tName[10]; 
261   Float_t nBadEvPer;
262   
263   TObjArray aDaqSig(7); aDaqSig.SetOwner(kTRUE); for(Int_t i=0;i<7;i++) aDaqSig.AddAt(new TMatrix(160,144),i); //TObjArray of 7 TMatrixF, m(padx,pady)=sigma
264   
265   for(Int_t iddl=0;iddl<AliHMPIDRawStream::kNDDL;iddl++)            //retrieve the files from LDCs independently the DDL<->LDC connection
266   {
267     TList *pLdc=GetFileSources(kDAQ,Form("HmpidPedDdl%02i.txt",iddl)); //get list of LDC names containing id "pedestals"
268     if(!pLdc) {Log(Form("ERROR: Retrieval of sources for pedestals: HmpidPedDdl%02i.txt failed!",iddl));continue;}
269     
270     Log(Form("HMPID - Pedestal files to be read --> %i LDCs for HMPID",pLdc->GetEntries()));
271     for(Int_t i=0;i<pLdc->GetEntries();i++) {//lists of LDCs -- but in general we have 1 LDC for 1 ped file
272     TString fileName = GetFile(kDAQ,Form("HmpidPedDdl%02i.txt",iddl),((TObjString*)pLdc->At(i))->GetName());
273     if(fileName.Length()==0) {Log(Form("ERROR retrieving pedestal file: HmpidPedDdl%02i.txt!",iddl));continue;}
274   
275     //reading pedestal file
276     ifstream infile(fileName.Data()); 
277     
278     if(!infile.is_open()) {Log("No pedestal file found for HMPID,bye!");continue;}
279     TMatrix *pM=(TMatrixF*)aDaqSig.At(iddl/2);
280   
281     infile>>tName>>runNumber;Printf("Xcheck: reading run %i",runNumber);
282     infile>>tName>>ldcId;
283     infile>>tName>>timeStamp;
284     infile>>tName>>nEv; 
285     infile>>tName>>nDdlEv;
286     infile>>tName>>nBadEv;
287     infile>>tName>>nBadEvPer;
288     infile>>tName>>nSigCut; pM->SetUniqueID(nSigCut); //n. of pedestal distribution sigmas used to create zero suppresion table
289     while(!infile.eof()){
290       infile>>dec>>r>>d>>a>>mean>>sigma>>hex>>hard;
291       if(rs.GetPad(iddl,r,d,a)>=0){                     //the GetPad returns meaningful abs pad number                                                          
292       dig.SetPad(rs.GetPad(iddl,r,d,a));
293       dig.SetQ((Int_t)mean);
294       (*pM)(dig.PadChX(),dig.PadChY()) = sigma;
295       }
296     }
297     infile.close();
298     Log(Form("Pedestal file for DDL %i read successfully",iddl));
299   
300   }//LDCs reading entries
301
302  }//DDL 
303
304   AliCDBMetaData metaData; 
305   metaData.SetBeamPeriod(0); 
306   metaData.SetResponsible("AliHMPIDPreprocessor"); 
307   metaData.SetComment("HMPID processor fills TObjArrays.");  
308   stPedStore = Store("Calib","DaqSig",&aDaqSig,&metaData,0,kTRUE);
309 //  stPedStore = Store("Calib","DaqSig",&aDaqSig,&metaData);
310   if(!stPedStore) {
311     Log("HMPID - failure to store PEDESTAL data results in OCDB");    
312   }
313   return stPedStore;
314   
315 }//ProcPed()  
316 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
317 Double_t AliHMPIDPreprocessor::ProcTrans(TMap* pMap)
318 {
319   //  Process transparency monitoring data and calculates Emean  
320   
321   Double_t sEnergProb=0, sProb=0;
322
323   Double_t tRefCR5 = 19. ;                                      // mean temperature of CR5 where the system is in place
324
325   Double_t eMean = 0;
326       
327   AliDCSValue *pVal;
328
329   for(Int_t i=0; i<30; i++){
330
331     // evaluate wavelenght 
332     TObjArray *pWaveLenght = (TObjArray*)pMap->GetValue(Form("HMP_DET/HMP_INFR/HMP_INFR_TRANPLANT/HMP_INFR_TRANPLANT_MEASURE.mesure%i.waveLenght",i));
333     if(!pWaveLenght){ 
334         AliWarning(Form("No Data Point values for HMP_DET/HMP_INFR/HMP_INFR_TRANPLANT/HMP_INFR_TRANPLANT_MEASURE.mesure%i.waveLenght  -----> Default E mean used!!!!!",i));
335         return DefaultEMean(); // to be checked
336       } 
337         
338     pVal=(AliDCSValue*)pWaveLenght->At(0);
339     Double_t lambda = pVal->GetFloat();
340
341     Double_t photEn = 1239.842609/lambda;     // 1239.842609 from nm to eV
342     
343     if(photEn<AliHMPIDParam::EPhotMin() || photEn>AliHMPIDParam::EPhotMax()) continue;
344     
345     // evaluate phototube current for argon reference
346     TObjArray *pArgonRef  = (TObjArray*)pMap->GetValue(Form("HMP_DET/HMP_INFR/HMP_INFR_TRANPLANT/HMP_INFR_TRANPLANT_MEASURE.mesure%i.argonReference",i));
347     if(!pArgonRef){ 
348         AliWarning(Form("No Data Point values for HMP_DET/HMP_INFR/HMP_INFR_TRANPLANT/HMP_INFR_TRANPLANT_MEASURE.mesure%i.argonReference  -----> Default E mean used!!!!!",i));
349         return DefaultEMean(); // to be checked
350       } 
351
352     pVal=(AliDCSValue*)pArgonRef->At(0);    
353     Double_t aRefArgon = pVal->GetFloat();
354
355     // evaluate phototube current for argon cell
356     TObjArray *pArgonCell = (TObjArray*)pMap->GetValue(Form("HMP_DET/HMP_INFR/HMP_INFR_TRANPLANT/HMP_INFR_TRANPLANT_MEASURE.mesure%i.argonCell",i));
357     if(!pArgonCell){ 
358         AliWarning(Form("No Data Point values for HMP_DET/HMP_INFR/HMP_INFR_TRANPLANT/HMP_INFR_TRANPLANT_MEASURE.mesure%i.argonCell  -----> Default E mean used!!!!!",i));
359         return DefaultEMean(); // to be checked
360       } 
361       
362     pVal=(AliDCSValue*)pArgonRef->At(0);
363     Double_t aCellArgon = pVal->GetFloat();
364
365     //evaluate phototube current for freon reference
366     TObjArray *pFreonRef  = (TObjArray*)pMap->GetValue(Form("HMP_DET/HMP_INFR/HMP_INFR_TRANPLANT/HMP_INFR_TRANPLANT_MEASURE.mesure%i.c6f14Reference",i));
367     if(!pFreonRef){ 
368         AliWarning(Form("No Data Point values for HMP_DET/HMP_INFR/HMP_INFR_TRANPLANT/HMP_INFR_TRANPLANT_MEASURE.mesure%i.c6f14Reference  -----> Default E mean used!!!!!",i));
369         return DefaultEMean(); // to be checked
370       } 
371         
372     pVal=(AliDCSValue*)pFreonRef->At(0);
373     Double_t aRefFreon = pVal->GetFloat();
374
375     //evaluate phototube current for freon cell
376     TObjArray *pFreonCell = (TObjArray*)pMap->GetValue(Form("HMP_DET/HMP_INFR/HMP_INFR_TRANPLANT/HMP_INFR_TRANPLANT_MEASURE.mesure%i.c6f14Cell",i));
377     if(!pFreonCell){
378         AliWarning(Form("No Data Point values for HMP_DET/HMP_INFR/HMP_INFR_TRANPLANT/HMP_INFR_TRANPLANT_MEASURE.mesure%i.c6f14Cell  -----> Default E mean used!!!!!",i));
379         return DefaultEMean(); // to be checked
380       }
381
382     pVal=(AliDCSValue*)pFreonCell->At(0);
383     Double_t aCellFreon = pVal->GetFloat();
384  
385    //evaluate correction factor to calculate trasparency (Ref. NIMA 486 (2002) 590-609)
386     
387     Double_t aN1 = AliHMPIDParam::NIdxRad(photEn,tRefCR5);
388     Double_t aN2 = AliHMPIDParam::NMgF2Idx(photEn);
389     Double_t aN3 = 1;                              // Argon Idx
390
391     Double_t aR1               = ((aN1 - aN2)*(aN1 - aN2))/((aN1 + aN2)*(aN1 + aN2));
392     Double_t aR2               = ((aN2 - aN3)*(aN2 - aN3))/((aN2 + aN3)*(aN2 + aN3));
393     Double_t aT1               = (1 - aR1);
394     Double_t aT2               = (1 - aR2);
395     Double_t aCorrFactor       = (aT1*aT1)/(aT2*aT2);
396
397     // evaluate 15 mm of thickness C6F14 Trans
398     Double_t aTransRad;
399     
400     if(aRefFreon*aRefArgon>0) {
401       aTransRad  = TMath::Power((aCellFreon/aRefFreon)/(aCellArgon/aRefArgon)*aCorrFactor,1.5);
402     } else {
403       return DefaultEMean();
404     }
405
406     // evaluate 0.5 mm of thickness SiO2 Trans
407     Double_t aTransSiO2 = TMath::Exp(-0.5/AliHMPIDParam::LAbsWin(photEn));
408
409     // evaluate 80 cm of thickness Gap (low density CH4) transparency
410     Double_t aTransGap  = TMath::Exp(-80./AliHMPIDParam::LAbsGap(photEn));
411
412     // evaluate CsI quantum efficiency
413     Double_t aCsIQE            = AliHMPIDParam::QEffCSI(photEn);
414
415     // evaluate total convolution of all material optical properties
416     Double_t aTotConvolution   = aTransRad*aTransSiO2*aTransGap*aCsIQE;
417
418     sEnergProb+=aTotConvolution*photEn;  
419   
420     sProb+=aTotConvolution;  
421 }
422   if(sProb>0) {
423     eMean = sEnergProb/sProb;
424   } else {
425     return DefaultEMean();
426   }
427   Log(Form(" Mean energy photon calculated ---> %f eV ",eMean));
428
429   if(eMean<AliHMPIDParam::EPhotMin() || eMean>AliHMPIDParam::EPhotMax()) return DefaultEMean();
430   
431   return eMean;
432 }   
433 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
434 Double_t AliHMPIDPreprocessor::DefaultEMean()
435 {
436     Double_t eMean = 6.675;      //just set a refractive index for C6F14 at ephot=6.675 eV @ T=25 C
437     AliWarning(Form("Mean energy for photons out of range [%f,%f] in Preprocessor. Default value Eph=%f eV taken.",AliHMPIDParam::EPhotMin(),
438                                                                                                                    AliHMPIDParam::EPhotMax(),
439                                                                                                                    eMean));
440     return eMean;
441 }