writing empty Digits too
[u/mrichter/AliRoot.git] / START / AliSTARTDigitizer.cxx
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ede9aff7 1
2/**************************************************************************
3 * Copyright(c) 1998-2000, ALICE Experiment at CERN, All rights reserved. *
4 * *
5 * Author: The ALICE Off-line Project. *
6 * Contributors are mentioned in the code where appropriate. *
7 * *
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 **************************************************************************/
16
17
18#include <TTree.h>
ede9aff7 19#include <TFile.h>
20#include <TDirectory.h>
21#include <TRandom.h>
e73d68f2 22#include <TArrayI.h>
2b4678e2 23#include <TError.h>
e4da63c2 24#include <TH1F.h>
c848a65b 25#include <TGraph.h>
ede9aff7 26
e4da63c2 27#include "AliLog.h"
ede9aff7 28#include "AliSTARTDigitizer.h"
29#include "AliSTART.h"
30#include "AliSTARThit.h"
31#include "AliSTARTdigit.h"
32#include "AliRunDigitizer.h"
affef71b 33#include <AliDetector.h>
ede9aff7 34#include "AliRun.h"
affef71b 35#include <AliLoader.h>
36#include <AliRunLoader.h>
ede9aff7 37#include <stdlib.h>
ef0750c2 38#include <Riostream.h>
39#include <Riostream.h>
c848a65b 40#include "AliSTARTParameters.h"
41#include "AliCDBLocal.h"
42#include "AliCDBStorage.h"
43#include "AliCDBManager.h"
44#include "AliCDBEntry.h"
ede9aff7 45
46ClassImp(AliSTARTDigitizer)
47
48//___________________________________________
49 AliSTARTDigitizer::AliSTARTDigitizer() :AliDigitizer()
50{
51// Default ctor - don't use it
52 ;
53}
54
55//___________________________________________
56AliSTARTDigitizer::AliSTARTDigitizer(AliRunDigitizer* manager)
7a18b6a5 57 :AliDigitizer(manager),
58 fSTART(0),
59 fHits(0),
60 fdigits(0),
c848a65b 61 ftimeCFD(0),
62 ftimeLED(0),
7a18b6a5 63 fADC(0),
c848a65b 64 fADC0(0)
ede9aff7 65{
ede9aff7 66// ctor which should be used
e4da63c2 67
68 AliDebug(1,"processed");
69
7a18b6a5 70 fSTART = 0;
7a18b6a5 71 fHits = 0;
72 fdigits = 0;
73
c848a65b 74 ftimeCFD = new TArrayI(24);
db173afc 75 fADC = new TArrayI(24);
c848a65b 76 ftimeLED = new TArrayI(24);
77 fADC0 = new TArrayI(24);
db173afc 78
174d209f 79
ede9aff7 80}
81
82//------------------------------------------------------------------------
83AliSTARTDigitizer::~AliSTARTDigitizer()
84{
85// Destructor
e4da63c2 86
7a18b6a5 87 AliDebug(1,"START");
88
c848a65b 89 delete ftimeCFD;
e4da63c2 90 delete fADC;
c848a65b 91 delete ftimeLED;
92 delete fADC0;
ede9aff7 93}
94
95 //------------------------------------------------------------------------
96Bool_t AliSTARTDigitizer::Init()
97{
98// Initialization
e4da63c2 99 AliDebug(1," Init");
ede9aff7 100 return kTRUE;
101}
102
103
104//---------------------------------------------------------------------
105
dc63cec5 106void AliSTARTDigitizer::Exec(Option_t* /*option*/)
ede9aff7 107{
108
affef71b 109 /*
110 Produde digits from hits
111 digits is TObject and includes
112 We are writing array if left & right TDC
113 left & right ADC (will need for slow simulation)
114 TOF first particle left & right
115 mean time and time difference (vertex position)
116
117 */
88cb7938 118
db173afc 119 //output loader
120 AliRunLoader *outRL = AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
121 AliLoader * pOutStartLoader = outRL->GetLoader("STARTLoader");
88cb7938 122
e4da63c2 123 AliDebug(1,"start...");
db173afc 124 //input loader
ede9aff7 125 //
126 // From hits to digits
127 //
c848a65b 128 Int_t hit, nhits;
129 Int_t countE[24];
130 Int_t volume, pmt, trCFD, trLED;
131 Float_t sl, qt;
4c7da157 132 Int_t bestRightTDC, bestLeftTDC, qtCh;
c848a65b 133 Float_t time[24], besttime[24], timeGaus[24] ;
db173afc 134 //Q->T-> coefficients !!!! should be asked!!!
c848a65b 135 Float_t gain[24],timeDelayCFD[24], timeDelayLED[24];
db173afc 136 Int_t threshold =50; //photoelectrons
c848a65b 137 Float_t zdetA, zdetC;
ad89b610 138 Int_t sumMultCoeff = 25;
c848a65b 139 TObjArray slewingLED;
7bdc4686 140 TObjArray slewingRec;
c848a65b 141 AliSTARTParameters* param = AliSTARTParameters::Instance();
7bdc4686 142 param->Init();
143
c848a65b 144 Int_t ph2Mip = param->GetPh2Mip();
145 Int_t channelWidth = param->GetChannelWidth() ;
7bdc4686 146 Float_t delayVertex = param->GetTimeDelayTVD();
c848a65b 147 for (Int_t i=0; i<24; i++){
148 timeDelayCFD[i] = param->GetTimeDelayCFD(i);
149 timeDelayLED[i] = param->GetTimeDelayLED(i);
150 gain[i] = param->GetGain(i);
151 TGraph* gr = param ->GetSlew(i);
152 slewingLED.AddAtAndExpand(gr,i);
7bdc4686 153
154 TGraph* gr1 = param ->GetSlewRec(i);
155 slewingRec.AddAtAndExpand(gr1,i);
156
c848a65b 157 TGraph* grEff = param ->GetPMTeff(i);
158 fEffPMT.AddAtAndExpand(grEff,i);
159 }
160 zdetC = param->GetZposition(0);
161 zdetA = param->GetZposition(1);
e73d68f2 162
ede9aff7 163 AliSTARThit *startHit;
164 TBranch *brHits=0;
c848a65b 165
ede9aff7 166 Int_t nFiles=fManager->GetNinputs();
167 for (Int_t inputFile=0; inputFile<nFiles; inputFile++) {
6fc133d2 168 if (inputFile < nFiles-1) {
c848a65b 169 AliWarning(Form("ignoring input stream %d", inputFile));
170 continue;
171
6fc133d2 172 }
db173afc 173
174 Float_t besttimeright=99999.;
175 Float_t besttimeleft=99999.;
c848a65b 176 Int_t pmtBestRight=9999;
177 Int_t pmtBestLeft=9999;
7bdc4686 178 Int_t timeDiff=999, meanTime=0;
ad89b610 179 Int_t sumMult =0;// fSumMult=0;
180 bestRightTDC = 99999; bestLeftTDC = 99999;
181
c848a65b 182 ftimeCFD -> Reset();
183 fADC -> Reset();
184 fADC0 -> Reset();
185 ftimeLED ->Reset();
db173afc 186 for (Int_t i0=0; i0<24; i0++)
e73d68f2 187 {
40d2047f 188 time[i0]=besttime[i0]=timeGaus[i0]=99999; countE[i0]=0;
e73d68f2 189 }
db173afc 190 AliRunLoader * inRL = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(inputFile));
191 AliLoader * pInStartLoader = inRL->GetLoader("STARTLoader");
6fc133d2 192 if (!inRL->GetAliRun()) inRL->LoadgAlice();
985b3149 193 AliSTART *fSTART = (AliSTART*)inRL ->GetAliRun()->GetDetector("START");
db173afc 194
195 //read Hits
affef71b 196 pInStartLoader->LoadHits("READ");//probably it is necessary to load them before
affef71b 197 TClonesArray *fHits = fSTART->Hits ();
affef71b 198 TTree *th = pInStartLoader->TreeH();
ede9aff7 199 brHits = th->GetBranch("START");
200 if (brHits) {
e4da63c2 201 fSTART->SetHitsAddressBranch(brHits);
ede9aff7 202 }else{
db173afc 203 AliError("Branch START hit not found");
00907af4 204 exit(111);
ede9aff7 205 }
206 Int_t ntracks = (Int_t) th->GetEntries();
db173afc 207
e4da63c2 208 if (ntracks<=0) return;
ede9aff7 209 // Start loop on tracks in the hits containers
210 for (Int_t track=0; track<ntracks;track++) {
211 brHits->GetEntry(track);
7a68e0ef 212 nhits = fHits->GetEntriesFast();
db173afc 213 for (hit=0;hit<nhits;hit++)
e4da63c2 214 {
215 startHit = (AliSTARThit*) fHits->UncheckedAt(hit);
216 if (!startHit) {
217 AliError("The unchecked hit doesn't exist");
218 break;
219 }
220 pmt=startHit->Pmt();
221 Int_t numpmt=pmt-1;
db173afc 222 Double_t e=startHit->Etot();
e4da63c2 223 volume = startHit->Volume();
e4da63c2 224
c848a65b 225 if(e>0 && RegisterPhotoE(numpmt,e)) {
db173afc 226 countE[numpmt]++;
227 besttime[numpmt] = startHit->Time();
228 if(besttime[numpmt]<time[numpmt])
229 {
230 time[numpmt]=besttime[numpmt];
231 }
c848a65b 232 } //photoelectron accept
e4da63c2 233 } //hits loop
ede9aff7 234 } //track loop
e4da63c2 235
db173afc 236 //spread time right&left by 25ps && besttime
4c7da157 237 Float_t c = 0.0299792; // cm/ps
238
239 Float_t koef=(zdetA-zdetC)/c; //correction position difference by cable
db173afc 240 for (Int_t ipmt=0; ipmt<12; ipmt++){
241 if(countE[ipmt] > threshold) {
c848a65b 242 timeGaus[ipmt]=gRandom->Gaus(time[ipmt],25)+koef;
243 if(timeGaus[ipmt]<besttimeleft){
244 besttimeleft=timeGaus[ipmt]; //timeleft
245 pmtBestLeft=ipmt;}
ad89b610 246 }
db173afc 247 }
0c1330a8 248 for ( Int_t ipmt=12; ipmt<24; ipmt++){
db173afc 249 if(countE[ipmt] > threshold) {
250 timeGaus[ipmt]=gRandom->Gaus(time[ipmt],25);
c848a65b 251 if(timeGaus[ipmt]<besttimeright) {
252 besttimeright=timeGaus[ipmt]; //timeright
253 pmtBestRight=ipmt;}
db173afc 254 }
255 }
c848a65b 256 //folding with alignmentz position distribution
ad89b610 257 if( besttimeleft > 10000. && besttimeleft <15000)
258 bestLeftTDC=Int_t ((besttimeleft+1000*timeDelayCFD[pmtBestLeft])
259 /channelWidth);
4c7da157 260
ad89b610 261 if( besttimeright > 10000. && besttimeright <15000)
262 bestRightTDC=Int_t ((besttimeright+1000*timeDelayCFD[pmtBestRight])
c848a65b 263 /channelWidth);
ad89b610 264
265 if (bestRightTDC < 99999 && bestLeftTDC < 99999)
266 {
267 timeDiff=Int_t (((besttimeleft-besttimeright)+1000*delayVertex)
268 /channelWidth);
269 meanTime=Int_t (((besttimeright+1000*timeDelayCFD[pmtBestLeft]+
270 besttimeleft+1000*timeDelayCFD[pmtBestLeft])/2.)
271 /channelWidth);
ad89b610 272 }
6672a3cb 273 AliDebug(10,Form(" time right& left %i %i time diff && mean time in channels %i %i",bestRightTDC,bestLeftTDC, timeDiff, meanTime));
db173afc 274 for (Int_t i=0; i<24; i++)
e73d68f2 275 {
c848a65b 276 Float_t al = countE[i];
277 if (al>threshold && timeGaus[i]<50000 ) {
ad89b610 278 //fill ADC
279 // QTC procedure:
280 // phe -> mV 0.3; 1MIP ->500phe -> ln (amp (mV)) = 5;
281 // max 200ns, HIJING mean 50000phe -> 15000mv -> ln = 15 (s zapasom)
282 // channel 25ps
c848a65b 283 qt= 50.*al*gain[i]/ph2Mip; // 50mv/Mip amp in mV
ad89b610 284 // fill TDC
c848a65b 285 trCFD = Int_t (timeGaus[i] + 1000.*timeDelayCFD[i])/channelWidth;
286 trLED= Int_t (timeGaus[i] + 1000.*timeDelayLED[i]);
287 sl = ((TGraph*)slewingLED.At(i))->Eval(qt);
288 trLED = Int_t(( trLED + 1000*sl )/channelWidth);
289 qtCh=Int_t (1000.*TMath::Log(qt)) / channelWidth;
290 fADC0->AddAt(0,i);
291 fADC->AddAt(qtCh,i);
292 ftimeCFD->AddAt(Int_t (trCFD),i);
293 ftimeLED->AddAt(trLED,i);
ad89b610 294 // sumMult += Int_t ((al*gain[i]/ph2Mip)*50) ;
295 sumMult += Int_t (qt/sumMultCoeff) ;
296
297 AliDebug(10,Form(" pmt %i : time in ns %f time in channels %i ",
298 i, timeGaus[i],trCFD ));
299 AliDebug(10,Form(" qt in mV %f qt in ns %f qt in channels %i ",qt,
300 TMath::Log(qt), qtCh));
db173afc 301 }
e4da63c2 302 } //pmt loop
db173afc 303
ad89b610 304 if (sumMult > threshold){
305 fSumMult = Int_t (1000.* TMath::Log(Double_t(sumMult) / Double_t(sumMultCoeff))
306 /channelWidth);
0c1330a8 307 AliDebug(10,Form("summult mv %i mult in chammens %i in ps %i ",
ad89b610 308 sumMult, fSumMult, fSumMult*channelWidth));
309 }
6672a3cb 310 // if ( besttimeright<99999 || besttimeleft < 99999) {
311
ad89b610 312 fSTART->AddDigit(bestRightTDC,bestLeftTDC,meanTime,timeDiff,fSumMult,
313 ftimeCFD,fADC,ftimeLED,fADC0);
6672a3cb 314 // }
315
0c1330a8 316 AliDebug(10,Form(" Digits wrote bestRightTDC %i bestLeftTDC %i meanTime %i timeDiff %i fSumMult %i ", bestRightTDC,bestLeftTDC,meanTime,timeDiff,fSumMult ));
db173afc 317 pOutStartLoader->UnloadHits();
6fc133d2 318 } //input streams loop
db173afc 319
320 //load digits
321 pOutStartLoader->LoadDigits("UPDATE");
322 TTree *treeD = pOutStartLoader->TreeD();
323 if (treeD == 0x0) {
324 pOutStartLoader->MakeTree("D");
325 treeD = pOutStartLoader->TreeD();
326 }
c848a65b 327 treeD->Reset();
328 fSTART = (AliSTART*)outRL ->GetAliRun()->GetDetector("START");
329 // Make a branch in the tree
db173afc 330 fSTART->MakeBranch("D");
db173afc 331 treeD->Fill();
332
c848a65b 333 pOutStartLoader->WriteDigits("OVERWRITE");
334
c848a65b 335 fSTART->ResetDigits();
336 pOutStartLoader->UnloadDigits();
337
ede9aff7 338}
339
340
e73d68f2 341//------------------------------------------------------------------------
c848a65b 342Bool_t AliSTARTDigitizer::RegisterPhotoE(Int_t ipmt,Double_t energy)
e73d68f2 343{
e4da63c2 344
345
346 // Float_t hc=197.326960*1.e6; //mev*nm
2303c85c 347 Double_t hc=1.973*1.e-6; //gev*nm
2303c85c 348 Float_t lambda=hc/energy;
c848a65b 349 Float_t eff = ((TGraph*) fEffPMT.At(ipmt))->Eval(lambda);
e4da63c2 350 Double_t p = gRandom->Rndm();
c848a65b 351
e4da63c2 352 if (p > eff)
353 return kFALSE;
354
355 return kTRUE;
e73d68f2 356}
c848a65b 357
7a68e0ef 358//----------------------------------------------------------------------------