2 /**************************************************************************
3 * Copyright(c) 1998-2000, ALICE Experiment at CERN, All rights reserved. *
5 * Author: The ALICE Off-line Project. *
6 * Contributors are mentioned in the code where appropriate. *
8 * Permission to use, copy, modify and distribute this software and its *
9 * documentation strictly for non-commercial purposes is hereby granted *
10 * without fee, provided that the above copyright notice appears in all *
11 * copies and that both the copyright notice and this permission notice *
12 * appear in the supporting documentation. The authors make no claims *
13 * about the suitability of this software for any purpose. It is *
14 * provided "as is" without express or implied warranty. *
15 **************************************************************************/
19 /******************************************************************
20 * Produde digits from hits
21 * digits is TObject and includes
22 * We are writing array if C & A TDC
23 * C & A ADC (will need for slow simulation)
24 * TOF first particle C & A
25 * mean time and time difference (vertex position)
27 * Alla.Maevskaya@cern.ch
28 ****************************************************************/
40 #include "AliT0Digitizer.h"
43 #include "AliT0digit.h"
44 #include "AliRunDigitizer.h"
46 #include <AliLoader.h>
47 #include <AliRunLoader.h>
49 #include "AliT0Parameters.h"
51 ClassImp(AliT0Digitizer)
53 //___________________________________________
54 AliT0Digitizer::AliT0Digitizer() :AliDigitizer(),
58 ftimeCFD(new TArrayI(24)),
59 ftimeLED (new TArrayI(24)),
60 fADC(new TArrayI(24)),
61 fADC0 (new TArrayI(24)),
67 // Default ctor - don't use it
71 //___________________________________________
72 AliT0Digitizer::AliT0Digitizer(AliRunDigitizer* manager)
73 :AliDigitizer(manager),
77 ftimeCFD(new TArrayI(24)),
78 ftimeLED (new TArrayI(24)),
79 fADC(new TArrayI(24)),
80 fADC0 (new TArrayI(24)),
86 // ctor which should be used
88 AliDebug(1,"processed");
89 fParam = AliT0Parameters::Instance();
92 for (Int_t i=0; i<24; i++){
93 TGraph* gr = fParam ->GetAmpLED(i);
94 Int_t np = gr->GetN();
95 Double_t *x = gr->GetX();
96 Double_t *y = gr->GetY();
98 Double_t *x1 = new Double_t[np];
99 Double_t *y1 = new Double_t[np];
100 for (Int_t ii=0; ii<np; ii++) {
105 TGraph *grInverse = new TGraph(np,y1,x1);
106 fAmpLED.AddAtAndExpand(grInverse,i);
108 for (Int_t i=0; i<24; i++){
109 TGraph* grq = fParam ->GetQTC(i);
110 Int_t npq = grq->GetN();
111 Double_t *xq = grq->GetX();
112 Double_t *yq = grq->GetY();
113 Double_t *x1q = new Double_t[npq];
114 Double_t *y1q = new Double_t[npq];
115 for (Int_t ii=1; ii<npq; ii++) {
119 TGraph *grInverseQTC = new TGraph(npq,y1q,x1q);
120 fAmpQTC.AddAtAndExpand(grInverseQTC,i);
124 //------------------------------------------------------------------------
125 AliT0Digitizer::~AliT0Digitizer()
138 //------------------------------------------------------------------------
139 Bool_t AliT0Digitizer::Init()
146 //---------------------------------------------------------------------
147 void AliT0Digitizer::Exec(Option_t* /*option*/)
151 Produde digits from hits
152 digits is TObject and includes
153 We are writing array if C & A TDC
154 C & A ADC (will need for slow simulation)
155 TOF first particle C & A
156 mean time and time difference (vertex position)
161 AliRunLoader *outRL = AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
162 AliLoader * pOutStartLoader = outRL->GetLoader("T0Loader");
164 AliDebug(1,"start...");
167 // From hits to digits
171 Int_t volume, pmt, trCFD, trLED;
176 Float_t time[24], besttime[24], timeGaus[24] ;
177 //Q->T-> coefficients !!!! should be asked!!!
178 Float_t timeDelayCFD[24];
179 Int_t threshold =50; //photoelectrons
180 Float_t zdetA, zdetC;
181 Int_t sumMultCoeff = 100;
184 Int_t ph2Mip = fParam->GetPh2Mip();
185 Float_t channelWidth = fParam->GetChannelWidth() ;
186 Float_t delayVertex = fParam->GetTimeDelayTVD();
189 zdetC = TMath::Abs(fParam->GetZPosition("T0/C/PMT1"));
190 zdetA = TMath::Abs(fParam->GetZPosition("T0/A/PMT15"));
192 // printf(" !!!!!Z det A = %f C = % f",zdetA,zdetC);
196 Int_t nFiles=fManager->GetNinputs();
197 for (Int_t inputFile=0; inputFile<nFiles; inputFile++) {
198 if (inputFile < nFiles-1) {
199 AliWarning(Form("ignoring input stream %d", inputFile));
204 Float_t besttimeC=99999.;
205 Float_t besttimeA=99999.;
206 Int_t pmtBestC=99999;
207 Int_t pmtBestA=99999;
208 Int_t timeDiff=99999, meanTime=99999;
209 Int_t sumMult =0; fSumMult=0;
210 bestATDC = 99999; bestCTDC = 99999;
217 for (Int_t i0=0; i0<24; i0++)
219 time[i0]=besttime[i0]=timeGaus[i0]=999999; countE[i0]=0;
221 AliRunLoader * inRL = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(inputFile));
222 AliLoader * pInStartLoader = inRL->GetLoader("T0Loader");
223 if (!inRL->GetAliRun()) inRL->LoadgAlice();
224 fT0 = (AliT0*)inRL ->GetAliRun()->GetDetector("T0");
227 pInStartLoader->LoadHits("READ");//probably it is necessary to load them before
228 fHits = fT0->Hits ();
229 TTree *th = pInStartLoader->TreeH();
230 brHits = th->GetBranch("T0");
232 fT0->SetHitsAddressBranch(brHits);
234 AliWarning("Branch T0 hit not found for this event");
235 // fT0->AddDigit(bestATDC,bestCTDC,meanTime,timeDiff,fSumMult, refpoint,
236 // ftimeCFD,fADC0,ftimeLED,fADC);
239 Int_t ntracks = (Int_t) th->GetEntries();
241 if (ntracks<=0) return;
242 // Start loop on tracks in the hits containers
243 for (Int_t track=0; track<ntracks;track++) {
244 brHits->GetEntry(track);
245 nhits = fHits->GetEntriesFast();
246 for (hit=0;hit<nhits;hit++)
248 startHit = (AliT0hit*) fHits->UncheckedAt(hit);
250 AliError("The unchecked hit doesn't exist");
255 Double_t e=startHit->Etot();
256 volume = startHit->Volume();
260 besttime[numpmt] = startHit->Time();
261 if(besttime[numpmt]<time[numpmt])
263 time[numpmt]=besttime[numpmt];
265 } //photoelectron accept
269 //spread time A&C by 25ps && besttime
270 Float_t c = 0.0299792; // cm/ps
272 Float_t koef=(zdetA-zdetC)/c; //correction position difference by cable
273 for (Int_t ipmt=0; ipmt<12; ipmt++){
274 if(countE[ipmt] > threshold) {
275 timeGaus[ipmt]=gRandom->Gaus(time[ipmt],25)+koef;
276 if(timeGaus[ipmt]<besttimeC){
277 besttimeC=timeGaus[ipmt]; //timeC
281 for ( Int_t ipmt=12; ipmt<24; ipmt++){
282 if(countE[ipmt] > threshold) {
283 timeGaus[ipmt]=gRandom->Gaus(time[ipmt],25);
284 if(timeGaus[ipmt]<besttimeA) {
285 besttimeA=timeGaus[ipmt]; //timeA
290 timeDelayCFD[0] = fParam->GetTimeDelayCFD(0);
292 for (Int_t i=0; i<24; i++)
294 Float_t al = countE[i];
295 if (al>threshold && timeGaus[i]<50000 ) {
298 // phe -> mV 0.3; 1MIP ->500phe -> ln (amp (mV)) = 5;
299 // max 200ns, HIJING mean 50000phe -> 15000mv -> ln = 15 (s zapasom)
301 qt= al/ph2Mip; // 50mv/Mip amp in mV
302 // before will we have calibration for high multiplicity
303 // if (qt > 115.) qt =115.; //must be fix!!!
305 timeDelayCFD[i] = fParam->GetTimeDelayCFD(i);
306 trCFD = Int_t (timeGaus[i]/channelWidth + timeDelayCFD[i]);
308 TGraph* gr = ((TGraph*)fAmpLED.At(i));
311 TGraph* gr1 = ((TGraph*)fAmpQTC.At(i));
312 qtCh = gr1->Eval(qt);
315 fADC->AddAt(Int_t(qtCh),i);
316 // sumMult += Int_t ((al*gain[i]/ph2Mip)*50) ;
317 sumMult += Int_t (qtCh/sumMultCoeff) ;
320 TGraph *fu=(TGraph*) fParam ->GetWalk(i);
321 Float_t slew=fu->Eval(Float_t(qtCh));
323 // trCFD=trCFD-Int_t(fMaxValue[i]-slew);
324 trCFD = trCFD + Int_t(slew); //for the same channel as cosmic
325 ftimeCFD->AddAt(Int_t (trCFD),i);
326 trLED = Int_t(trCFD + sl );
327 ftimeLED->AddAt(trLED,i);
328 AliDebug(10,Form(" pmt %i : time in ns %f time in channels %i LEd %i ", i, timeGaus[i],trCFD, trLED ));
329 AliDebug(10,Form(" qt in MIP %f led-cfd in %f qt in channels %f ",qt, sl, qtCh));
334 //folding with alignmentz position distribution
335 if( besttimeC > 10000. && besttimeC <15000)
336 bestCTDC=Int_t ((besttimeC+timeDelayCFD[pmtBestC])
339 if( besttimeA > 10000. && besttimeA <15000)
340 bestATDC=Int_t ((besttimeA+timeDelayCFD[pmtBestA])
343 if (bestATDC < 99999 && bestCTDC < 99999)
345 timeDiff=Int_t (((besttimeC-besttimeA)+1000*delayVertex)
347 meanTime=Int_t (((besttimeC+besttimeA)/2. )/channelWidth);
350 if (sumMult > threshold){
351 fSumMult = Int_t (1000.* TMath::Log(Double_t(sumMult) / Double_t(sumMultCoeff))
353 AliDebug(10,Form("summult mv %i mult in chammens %i in ps %f ",
354 sumMult, fSumMult, fSumMult*channelWidth));
357 fT0->AddDigit(bestATDC,bestCTDC,meanTime,timeDiff,fSumMult, refpoint,
358 ftimeCFD,fADC0,ftimeLED,fADC);
361 AliDebug(10,Form(" Digits wrote refpoint %i bestATDC %i bestCTDC %i meanTime %i timeDiff %i fSumMult %i ",refpoint ,bestATDC,bestCTDC,meanTime,timeDiff,fSumMult ));
362 pOutStartLoader->UnloadHits();
363 } //input streams loop
366 pOutStartLoader->LoadDigits("UPDATE");
367 TTree *treeD = pOutStartLoader->TreeD();
369 pOutStartLoader->MakeTree("D");
370 treeD = pOutStartLoader->TreeD();
373 fT0 = (AliT0*)outRL ->GetAliRun()->GetDetector("T0");
374 // Make a branch in the tree
375 fT0->MakeBranch("D");
378 pOutStartLoader->WriteDigits("OVERWRITE");
381 pOutStartLoader->UnloadDigits();