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Reconstruction with measused calibration
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dc7ca31d 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
9edefa04 17/* $Id$ */
dc7ca31d 18
94249139 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)
26 *
27 * Alla.Maevskaya@cern.ch
28 ****************************************************************/
29
30
dc7ca31d 31#include <TArrayI.h>
9edefa04 32#include <TFile.h>
dc7ca31d 33#include <TGraph.h>
9edefa04 34#include <TH1F.h>
35#include <TMath.h>
36#include <TRandom.h>
37#include <TTree.h>
dc7ca31d 38
39#include "AliLog.h"
40#include "AliT0Digitizer.h"
41#include "AliT0.h"
42#include "AliT0hit.h"
43#include "AliT0digit.h"
44#include "AliRunDigitizer.h"
dc7ca31d 45#include "AliRun.h"
46#include <AliLoader.h>
47#include <AliRunLoader.h>
48#include <stdlib.h>
dc7ca31d 49#include "AliT0Parameters.h"
dc7ca31d 50
51ClassImp(AliT0Digitizer)
52
53//___________________________________________
c41ceaac 54 AliT0Digitizer::AliT0Digitizer() :AliDigitizer(),
55 fT0(0),
56 fHits(0),
57 fdigits(0),
58 ftimeCFD(new TArrayI(24)),
59 ftimeLED (new TArrayI(24)),
60 fADC(new TArrayI(24)),
61 fADC0 (new TArrayI(24)),
62 fSumMult(0),
29d3e0eb 63 fAmpLED(0),
64 fParam(0)
c41ceaac 65
66
dc7ca31d 67{
68// Default ctor - don't use it
69 ;
70}
71
72//___________________________________________
73AliT0Digitizer::AliT0Digitizer(AliRunDigitizer* manager)
74 :AliDigitizer(manager),
75 fT0(0),
76 fHits(0),
77 fdigits(0),
c41ceaac 78 ftimeCFD(new TArrayI(24)),
79 ftimeLED (new TArrayI(24)),
80 fADC(new TArrayI(24)),
81 fADC0 (new TArrayI(24)),
82 fSumMult(0),
29d3e0eb 83 fAmpLED(0),
84 fParam(0)
dc7ca31d 85{
86// ctor which should be used
87
88 AliDebug(1,"processed");
29d3e0eb 89 fParam = AliT0Parameters::Instance();
90 fParam->Init();
dc7ca31d 91
29d3e0eb 92 for (Int_t i=0; i<24; i++){
93 TGraph* gr = fParam ->GetAmpLEDRec(i);
94 Int_t np = gr->GetN();
95 Double_t *x = gr->GetX();
96 Double_t *y = gr->GetY();
dc7ca31d 97
29d3e0eb 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++) {
2bcc7817 101 y1[ii]=y[np-ii-1]; x1[ii]=x[np-ii-1];
29d3e0eb 102 }
103
104 TGraph *grInverse = new TGraph(np,y1,x1);
105 delete [] x1;
106 delete [] y1;
107 fAmpLED.AddAtAndExpand(grInverse,i);
108 }
dc7ca31d 109}
dc7ca31d 110//------------------------------------------------------------------------
111AliT0Digitizer::~AliT0Digitizer()
112{
113// Destructor
114
115 AliDebug(1,"T0");
116
117 delete ftimeCFD;
118 delete fADC;
119 delete ftimeLED;
120 delete fADC0;
29d3e0eb 121 // delete fAmpLED;
dc7ca31d 122}
123
29d3e0eb 124//------------------------------------------------------------------------
dc7ca31d 125Bool_t AliT0Digitizer::Init()
126{
127// Initialization
128 AliDebug(1," Init");
129 return kTRUE;
130}
131
dc7ca31d 132//---------------------------------------------------------------------
dc7ca31d 133void AliT0Digitizer::Exec(Option_t* /*option*/)
134{
135
136 /*
137 Produde digits from hits
138 digits is TObject and includes
c41ceaac 139 We are writing array if C & A TDC
140 C & A ADC (will need for slow simulation)
141 TOF first particle C & A
dc7ca31d 142 mean time and time difference (vertex position)
143
144 */
145
146 //output loader
147 AliRunLoader *outRL = AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
148 AliLoader * pOutStartLoader = outRL->GetLoader("T0Loader");
149
150 AliDebug(1,"start...");
151 //input loader
152 //
153 // From hits to digits
154 //
74adb36a 155 Int_t hit, nhits;
dc7ca31d 156 Int_t countE[24];
157 Int_t volume, pmt, trCFD, trLED;
158 Float_t sl, qt;
c41ceaac 159 Int_t bestATDC, bestCTDC, qtCh;
dc7ca31d 160 Float_t time[24], besttime[24], timeGaus[24] ;
74adb36a 161 //Q->T-> coefficients !!!! should be asked!!!
162 Float_t timeDelayCFD[24];
dc7ca31d 163 Int_t threshold =50; //photoelectrons
164 Float_t zdetA, zdetC;
74adb36a 165 Int_t sumMultCoeff = 100;
740f0839 166 Int_t refpoint=0;
74adb36a 167 TH1F *hr;
c41ceaac 168
dc7ca31d 169
74adb36a 170
29d3e0eb 171 Int_t ph2Mip = fParam->GetPh2Mip();
8955c6b4 172 Float_t channelWidth = fParam->GetChannelWidth() ;
29d3e0eb 173 Float_t delayVertex = fParam->GetTimeDelayTVD();
5325480c 174
29d3e0eb 175 zdetC = TMath::Abs(fParam->GetZPosition("T0/C/PMT1"));
176 zdetA = TMath::Abs(fParam->GetZPosition("T0/A/PMT15"));
74adb36a 177
178 AliT0hit *startHit;
179 TBranch *brHits=0;
180
dc7ca31d 181 Int_t nFiles=fManager->GetNinputs();
182 for (Int_t inputFile=0; inputFile<nFiles; inputFile++) {
183 if (inputFile < nFiles-1) {
74adb36a 184 AliWarning(Form("ignoring input stream %d", inputFile));
185 continue;
186
dc7ca31d 187 }
188
c41ceaac 189 Float_t besttimeC=99999.;
190 Float_t besttimeA=99999.;
191 Int_t pmtBestC=9999;
192 Int_t pmtBestA=9999;
dc7ca31d 193 Int_t timeDiff=999, meanTime=0;
194 Int_t sumMult =0; fSumMult=0;
c41ceaac 195 bestATDC = 99999; bestCTDC = 99999;
dc7ca31d 196
c41ceaac 197
dc7ca31d 198 ftimeCFD -> Reset();
199 fADC -> Reset();
200 fADC0 -> Reset();
201 ftimeLED ->Reset();
202 for (Int_t i0=0; i0<24; i0++)
203 {
204 time[i0]=besttime[i0]=timeGaus[i0]=99999; countE[i0]=0;
205 }
206 AliRunLoader * inRL = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(inputFile));
207 AliLoader * pInStartLoader = inRL->GetLoader("T0Loader");
208 if (!inRL->GetAliRun()) inRL->LoadgAlice();
209 AliT0 *fT0 = (AliT0*)inRL ->GetAliRun()->GetDetector("T0");
210
211 //read Hits
212 pInStartLoader->LoadHits("READ");//probably it is necessary to load them before
213 TClonesArray *fHits = fT0->Hits ();
214 TTree *th = pInStartLoader->TreeH();
215 brHits = th->GetBranch("T0");
216 if (brHits) {
217 fT0->SetHitsAddressBranch(brHits);
218 }else{
219 AliError("Branch T0 hit not found");
220 exit(111);
221 }
222 Int_t ntracks = (Int_t) th->GetEntries();
223
224 if (ntracks<=0) return;
225 // Start loop on tracks in the hits containers
226 for (Int_t track=0; track<ntracks;track++) {
227 brHits->GetEntry(track);
228 nhits = fHits->GetEntriesFast();
229 for (hit=0;hit<nhits;hit++)
230 {
231 startHit = (AliT0hit*) fHits->UncheckedAt(hit);
232 if (!startHit) {
233 AliError("The unchecked hit doesn't exist");
234 break;
235 }
236 pmt=startHit->Pmt();
237 Int_t numpmt=pmt-1;
238 Double_t e=startHit->Etot();
239 volume = startHit->Volume();
240
241 // if(e>0 && RegisterPhotoE(numpmt,e)) {
242 if(e>0 ) {
243 countE[numpmt]++;
244 besttime[numpmt] = startHit->Time();
245 if(besttime[numpmt]<time[numpmt])
246 {
247 time[numpmt]=besttime[numpmt];
248 }
249 } //photoelectron accept
250 } //hits loop
251 } //track loop
252
c41ceaac 253 //spread time A&C by 25ps && besttime
dc7ca31d 254 Float_t c = 0.0299792; // cm/ps
255
256 Float_t koef=(zdetA-zdetC)/c; //correction position difference by cable
257 for (Int_t ipmt=0; ipmt<12; ipmt++){
258 if(countE[ipmt] > threshold) {
259 timeGaus[ipmt]=gRandom->Gaus(time[ipmt],25)+koef;
c41ceaac 260 if(timeGaus[ipmt]<besttimeC){
261 besttimeC=timeGaus[ipmt]; //timeC
262 pmtBestC=ipmt;}
9a5cba6d 263 }
dc7ca31d 264 }
9a5cba6d 265 for ( Int_t ipmt=12; ipmt<24; ipmt++){
dc7ca31d 266 if(countE[ipmt] > threshold) {
267 timeGaus[ipmt]=gRandom->Gaus(time[ipmt],25);
c41ceaac 268 if(timeGaus[ipmt]<besttimeA) {
269 besttimeA=timeGaus[ipmt]; //timeA
270 pmtBestA=ipmt;}
dc7ca31d 271 }
272 }
dc7ca31d 273
6bfb23c3 274 timeDelayCFD[0] = fParam->GetTimeDelayCFD(0);
2de4cb9c 275 Int_t meanTimeDelay=200;
6bfb23c3 276
dc7ca31d 277 for (Int_t i=0; i<24; i++)
278 {
279 Float_t al = countE[i];
280 if (al>threshold && timeGaus[i]<50000 ) {
281 //fill ADC
282 // QTC procedure:
283 // phe -> mV 0.3; 1MIP ->500phe -> ln (amp (mV)) = 5;
284 // max 200ns, HIJING mean 50000phe -> 15000mv -> ln = 15 (s zapasom)
285 // channel 25ps
c41ceaac 286 qt= 50.*al/ph2Mip; // 50mv/Mip amp in mV
dc7ca31d 287 // fill TDC
29d3e0eb 288 timeDelayCFD[i] = fParam->GetTimeDelayCFD(i);
74adb36a 289 trCFD = Int_t (timeGaus[i]/channelWidth + (timeDelayCFD[i]-timeDelayCFD[0]));
29d3e0eb 290 TGraph* gr = ((TGraph*)fAmpLED.At(i));
74adb36a 291 sl = gr->Eval(qt);
29d3e0eb 292
94c27e4f 293 trLED = Int_t(( timeGaus[i] + 1000*sl )/channelWidth);
8955c6b4 294 qtCh=Int_t (1000.*TMath::Log(qt) / channelWidth);
dc7ca31d 295 fADC0->AddAt(0,i);
296 fADC->AddAt(qtCh,i);
dc7ca31d 297 ftimeLED->AddAt(trLED,i);
298 // sumMult += Int_t ((al*gain[i]/ph2Mip)*50) ;
299 sumMult += Int_t (qt/sumMultCoeff) ;
300
74adb36a 301 // put slewing
29d3e0eb 302 TGraph *fu=(TGraph*) fParam ->GetWalk(i) ;
74adb36a 303 Float_t slew=fu->Eval(Float_t(qtCh));
304 hr=fu->GetHistogram();
305 Float_t maxValue=hr->GetMaximum(50);
306 trCFD=trCFD-Int_t((maxValue-slew)/channelWidth);
307 ftimeCFD->AddAt(Int_t (trCFD),i);
308 AliDebug(10,Form(" pmt %i : time in ns %f time in channels %i ",
309 i, timeGaus[i],trCFD ));
310 AliDebug(10,Form(" qt in mV %f qt in ns %f qt in channels %i ",qt,
311 TMath::Log(qt), qtCh));
312
dc7ca31d 313 }
314 } //pmt loop
315
9a5cba6d 316 //folding with alignmentz position distribution
317 if( besttimeC > 10000. && besttimeC <15000)
318 bestCTDC=Int_t ((besttimeC+timeDelayCFD[pmtBestC])
319 /channelWidth);
320
321 if( besttimeA > 10000. && besttimeA <15000)
322 bestATDC=Int_t ((besttimeA+timeDelayCFD[pmtBestA])
323 /channelWidth);
324
325 if (bestATDC < 99999 && bestCTDC < 99999)
326 {
327 timeDiff=Int_t (((besttimeC-besttimeA)+1000*delayVertex)
328 /channelWidth);
2de4cb9c 329 meanTime=Int_t (((besttimeC+besttimeA)/2. + meanTimeDelay)/channelWidth);
9a5cba6d 330 }
331 AliDebug(10,Form(" time A& C %i %i time diff && mean time in channels %i %i",bestATDC,bestCTDC, timeDiff, meanTime));
9a5cba6d 332
dc7ca31d 333 if (sumMult > threshold){
334 fSumMult = Int_t (1000.* TMath::Log(Double_t(sumMult) / Double_t(sumMultCoeff))
335 /channelWidth);
336 AliDebug(10,Form("summult mv %i mult in chammens %i in ps %i ",
337 sumMult, fSumMult, fSumMult*channelWidth));
338 }
dc7ca31d 339
740f0839 340 fT0->AddDigit(bestATDC,bestCTDC,meanTime,timeDiff,fSumMult, refpoint,
c41ceaac 341 ftimeCFD,fADC0,ftimeLED,fADC);
dc7ca31d 342
740f0839 343
344 AliDebug(10,Form(" Digits wrote refpoint %i bestATDC %i bestCTDC %i meanTime %i timeDiff %i fSumMult %i ",refpoint ,bestATDC,bestCTDC,meanTime,timeDiff,fSumMult ));
dc7ca31d 345 pOutStartLoader->UnloadHits();
346 } //input streams loop
347
348 //load digits
349 pOutStartLoader->LoadDigits("UPDATE");
350 TTree *treeD = pOutStartLoader->TreeD();
351 if (treeD == 0x0) {
352 pOutStartLoader->MakeTree("D");
353 treeD = pOutStartLoader->TreeD();
354 }
355 treeD->Reset();
356 fT0 = (AliT0*)outRL ->GetAliRun()->GetDetector("T0");
357 // Make a branch in the tree
358 fT0->MakeBranch("D");
359 treeD->Fill();
360
361 pOutStartLoader->WriteDigits("OVERWRITE");
362
363 fT0->ResetDigits();
364 pOutStartLoader->UnloadDigits();
365
366}