1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 //_________________________________________________________________________
19 // This is a TTask that constructs SDigits out of Hits
20 // A Summable Digits is the "sum" of all hits in a pad
21 // Detector response has been simulated via the method
22 // SimulateDetectorResponse
24 //-- Authors: F. Pierella, A. De Caro
25 // Use case: see AliTOFhits2sdigits.C macro in the CVS
26 //////////////////////////////////////////////////////////////////////////////
28 #include <Riostream.h>
31 #include <TBenchmark.h>
36 #include <TParticle.h>
42 #include "AliDetector.h"
43 #include "AliLoader.h"
45 #include "AliRunLoader.h"
47 #include "AliTOFGeometry.h"
48 #include "AliTOFHitMap.h"
49 #include "AliTOFSDigit.h"
50 #include "AliTOFSDigitizer.h"
51 #include "AliTOFhit.h"
52 #include "AliTOFhitT0.h"
59 ClassImp(AliTOFSDigitizer)
61 //____________________________________________________________________________
62 AliTOFSDigitizer::AliTOFSDigitizer():TTask("TOFSDigitizer","")
76 //____________________________________________________________________________
77 AliTOFSDigitizer::AliTOFSDigitizer(const char* HeaderFile, Int_t evNumber1, Int_t nEvents):TTask("TOFSDigitizer","")
80 fSelectedSector=-1; // by default we sdigitize all sectors
81 fSelectedPlate =-1; // by default we sdigitize all plates in all sectors
83 fHeadersFile = HeaderFile ; // input filename (with hits)
84 TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data());
86 //File was not opened yet open file and get alirun object
88 file = TFile::Open(fHeadersFile.Data(),"update") ;
89 gAlice = (AliRun *) file->Get("gAlice") ;
92 // add Task to //root/Tasks folder
93 fRunLoader = AliRunLoader::Open(HeaderFile);//open session and mount on default event folder
94 if (fRunLoader == 0x0)
96 Fatal("AliTOFSDigitizer","Event is not loaded. Exiting");
100 fRunLoader->LoadHeader();
102 if (evNumber1>=0) fEvent1 = evNumber1;
105 if (nEvents==0) fEvent2 = (Int_t)(fRunLoader->GetNumberOfEvents());
106 else if (nEvents>0) fEvent2 = evNumber1+nEvents;
109 if (!(fEvent2>fEvent1)) {
110 cout << " ERROR: fEvent2 = " << fEvent2 << " <= fEvent1 = " << fEvent1 << endl;
113 cout << " Correction: fEvent2 = " << fEvent2 << " <= fEvent1 = " << fEvent1 << endl;
116 // init parameters for sdigitization
119 fTOFLoader = fRunLoader->GetLoader("TOFLoader");
120 if (fTOFLoader == 0x0)
122 Fatal("AliTOFSDigitizer","Can not find TOF loader in event. Exiting.");
125 fTOFLoader->PostSDigitizer(this);
128 //____________________________________________________________________________
129 AliTOFSDigitizer::~AliTOFSDigitizer()
132 fTOFLoader->CleanSDigitizer();
135 //____________________________________________________________________________
136 void AliTOFSDigitizer::InitParameters()
138 // set parameters for detector simulation
140 fTimeResolution =0.120;
141 fpadefficiency =0.99 ;
148 fEffCenter = fpadefficiency;
150 fEff2Boundary = 0.90;
151 fEff3Boundary = 0.08;
155 fTimeWalkCenter = 0. ;
156 fTimeWalkBoundary=0. ;
157 fTimeWalkSlope = 0. ;
159 fPulseHeightSlope=2.0 ;
160 fTimeDelaySlope =0.060;
161 // was fMinimumCharge = TMath::Exp(fPulseHeightSlope*fKparameter/2.);
162 fMinimumCharge = TMath::Exp(-fPulseHeightSlope*fHparameter);
163 fChargeSmearing=0.0 ;
164 fLogChargeSmearing=0.13;
165 fTimeSmearing =0.022;
167 fTdcBin = 50.; // 1 TDC bin = 50 ps
168 fAdcBin = 0.25; // 1 ADC bin = 0.25 pC (or 0.03 pC)
169 fAdcMean = 50.; // ADC distribution mpv value for Landau (in bins)
170 // it corresponds to a mean value of ~100 bins
171 fAdcRms = 25.; // ADC distribution rms value (in bins)
172 // it corresponds to distribution rms ~50 bins
175 //__________________________________________________________________
176 Double_t TimeWithTail(Double_t* x, Double_t* par)
178 // sigma - par[0], alpha - par[1], part - par[2]
179 // at x<part*sigma - gauss
180 // at x>part*sigma - TMath::Exp(-x/alpha)
183 if(xx<par[0]*par[2]) {
184 f = TMath::Exp(-xx*xx/(2*par[0]*par[0]));
186 f = TMath::Exp(-(xx-par[0]*par[2])/par[1]-0.5*par[2]*par[2]);
192 //____________________________________________________________________________
193 void AliTOFSDigitizer::Exec(Option_t *verboseOption) {
195 if (strstr(verboseOption,"tim") || strstr(verboseOption,"all"))
196 gBenchmark->Start("TOFSDigitizer");
198 if (fEdgeTails) ftail = new TF1("tail",TimeWithTail,-2,2,3);
200 Int_t nselectedHits=0;
201 Int_t ntotalsdigits=0;
202 Int_t ntotalupdates=0;
203 Int_t nnoisesdigits=0;
204 Int_t nsignalsdigits=0;
205 Int_t nHitsFromPrim=0;
206 Int_t nHitsFromSec=0;
207 Int_t nlargeTofDiff=0;
209 Bool_t thereIsNotASelection=(fSelectedSector==-1) && (fSelectedPlate==-1);
211 fRunLoader->LoadgAlice();
212 gAlice = fRunLoader->GetAliRun();
214 fRunLoader->LoadKinematics();
216 AliTOF *TOF = (AliTOF *) gAlice->GetDetector("TOF");
219 Error("AliTOFSDigitizer","TOF not found");
223 fTOFLoader->LoadHits("read");
224 fTOFLoader->LoadSDigits("recreate");
226 for (Int_t iEvent=fEvent1; iEvent<fEvent2; iEvent++) {
227 cout << "------------------- "<< GetName() << " ------------- \n";
228 cout << "Sdigitizing event " << iEvent << endl;
230 fRunLoader->GetEvent(iEvent);
232 TTree *TH = fTOFLoader->TreeH ();
235 if (fTOFLoader->TreeS () == 0) fTOFLoader->MakeTree ("S");
237 //Make branch for digits
238 TOF->MakeBranch("S");
240 // recreate TClonesArray fSDigits - for backward compatibility
241 if (TOF->SDigits() == 0) {
242 TOF->CreateSDigitsArray();
244 TOF->RecreateSDigitsArray();
247 TOF->SetTreeAddress();
249 Int_t version=TOF->IsVersion();
251 Int_t nselectedHitsinEv=0;
252 Int_t ntotalsdigitsinEv=0;
253 Int_t ntotalupdatesinEv=0;
254 Int_t nnoisesdigitsinEv=0;
255 Int_t nsignalsdigitsinEv=0;
259 TClonesArray *TOFhits = TOF->Hits();
262 AliTOFHitMap *hitMap = new AliTOFHitMap(TOF->SDigits());
264 TBranch * tofHitsBranch = TH->GetBranch("TOF");
266 Int_t ntracks = static_cast<Int_t>(TH->GetEntries());
267 for (Int_t track = 0; track < ntracks; track++)
270 tofHitsBranch->GetEvent(track);
271 particle = gAlice->GetMCApp()->Particle(track);
272 Int_t nhits = TOFhits->GetEntriesFast();
273 // cleaning all hits of the same track in the same pad volume
274 // it is a rare event, however it happens
276 Int_t previousTrack =-1;
277 Int_t previousSector=-1;
278 Int_t previousPlate =-1;
279 Int_t previousStrip =-1;
280 Int_t previousPadX =-1;
281 Int_t previousPadZ =-1;
283 for (Int_t hit = 0; hit < nhits; hit++) {
284 Int_t vol[5]; // location for a digit
285 Float_t digit[2]; // TOF digit variables
291 // fp: really sorry for this, it is a temporary trick to have
294 AliTOFhit *tofHit = (AliTOFhit *) TOFhits->UncheckedAt(hit);
295 tracknum = tofHit->GetTrack();
296 vol[0] = tofHit->GetSector();
297 vol[1] = tofHit->GetPlate();
298 vol[2] = tofHit->GetStrip();
299 vol[3] = tofHit->GetPadx();
300 vol[4] = tofHit->GetPadz();
301 Xpad = tofHit->GetDx();
302 Zpad = tofHit->GetDz();
303 geantTime = tofHit->GetTof(); // unit [s]
305 AliTOFhitT0 *tofHit = (AliTOFhitT0 *) TOFhits->UncheckedAt(hit);
306 tracknum = tofHit->GetTrack();
307 vol[0] = tofHit->GetSector();
308 vol[1] = tofHit->GetPlate();
309 vol[2] = tofHit->GetStrip();
310 vol[3] = tofHit->GetPadx();
311 vol[4] = tofHit->GetPadz();
312 Xpad = tofHit->GetDx();
313 Zpad = tofHit->GetDz();
314 geantTime = tofHit->GetTof(); // unit [s]
317 geantTime *= 1.e+09; // conversion from [s] to [ns]
319 // selection case for sdigitizing only hits in a given plate of a given sector
320 if(thereIsNotASelection || (vol[0]==fSelectedSector && vol[1]==fSelectedPlate)){
322 Bool_t dummy=((tracknum==previousTrack) && (vol[0]==previousSector) && (vol[1]==previousPlate) && (vol[2]==previousStrip));
324 Bool_t isCloneOfThePrevious=dummy && ((vol[3]==previousPadX) && (vol[4]==previousPadZ));
326 Bool_t isNeighOfThePrevious=dummy && ((((vol[3]==previousPadX-1) || (vol[3]==previousPadX+1)) && (vol[4]==previousPadZ)) || ((vol[3]==previousPadX) && ((vol[4]==previousPadZ+1) || (vol[4]==previousPadZ-1))));
328 if(!isCloneOfThePrevious && !isNeighOfThePrevious){
329 // update "previous" values
330 // in fact, we are yet in the future, so the present is past
331 previousTrack=tracknum;
332 previousSector=vol[0];
333 previousPlate=vol[1];
334 previousStrip=vol[2];
340 if (particle->GetFirstMother() < 0) nHitsFromPrim++; // counts hits due to primary particles
342 Float_t xStrip=AliTOFGeometry::XPad()*(vol[3]+0.5-0.5*AliTOFGeometry::NpadX())+Xpad;
343 Float_t zStrip=AliTOFGeometry::ZPad()*(vol[4]+0.5-0.5*AliTOFGeometry::NpadZ())+Zpad;
345 Int_t nActivatedPads = 0, nFiredPads = 0;
346 Bool_t isFired[4] = {kFALSE, kFALSE, kFALSE, kFALSE};
347 Float_t tofAfterSimul[4] = {0., 0., 0., 0.};
348 Float_t qInduced[4] = {0.,0.,0.,0.};
349 Int_t nPlace[4] = {0, 0, 0, 0};
350 Float_t averageTime = 0.;
351 SimulateDetectorResponse(zStrip,xStrip,geantTime,nActivatedPads,nFiredPads,isFired,nPlace,qInduced,tofAfterSimul,averageTime);
353 for(Int_t indexOfPad=0; indexOfPad<nActivatedPads; indexOfPad++) {
354 if(isFired[indexOfPad]){ // the pad has fired
355 Float_t timediff=geantTime-tofAfterSimul[indexOfPad];
357 if(timediff>=0.2) nlargeTofDiff++;
359 digit[0] = (Int_t) ((tofAfterSimul[indexOfPad]*1.e+03)/fTdcBin); // TDC bin number (each bin -> 50. ps)
361 Float_t landauFactor = gRandom->Landau(fAdcMean, fAdcRms);
362 digit[1] = (Int_t) (qInduced[indexOfPad] * landauFactor); // ADC bins (each bin -> 0.25 (or 0.03) pC)
364 // recalculate the volume only for neighbouring pads
366 (nPlace[indexOfPad]<=AliTOFGeometry::NpadX()) ? vol[4] = 0 : vol[4] = 1;
367 (nPlace[indexOfPad]<=AliTOFGeometry::NpadX()) ? vol[3] = nPlace[indexOfPad] - 1 : vol[3] = nPlace[indexOfPad] - AliTOFGeometry::NpadX() - 1;
369 // check if two sdigit are on the same pad;
370 // in that case we sum the two or more sdigits
371 if (hitMap->TestHit(vol) != kEmpty) {
372 AliTOFSDigit *sdig = static_cast<AliTOFSDigit*>(hitMap->GetHit(vol));
373 Int_t tdctime = (Int_t) digit[0];
374 Int_t adccharge = (Int_t) digit[1];
375 sdig->Update(fTdcBin,tdctime,adccharge,tracknum);
380 TOF->AddSDigit(tracknum, vol, digit);
387 nsignalsdigitsinEv++;
392 } // if (hitMap->TestHit(vol) != kEmpty)
393 } // if(isFired[indexOfPad])
394 } // end loop on nActivatedPads
395 } // if(nFiredPads) i.e. if some pads has fired
396 } // close if(!isCloneOfThePrevious)
397 } // close the selection on sector and plate
398 } // end loop on hits for the current track
399 } // end loop on ntracks
403 fTOFLoader->TreeS()->Reset();
404 fTOFLoader->TreeS()->Fill();
405 fTOFLoader->WriteSDigits("OVERWRITE");
407 if (TOF->SDigits()) TOF->ResetSDigits();
409 if (strstr(verboseOption,"all")) {
410 cout << "---------------------------------------- \n";
411 cout << " <AliTOFSDigitizer> \n";
412 cout << "After sdigitizing " << nselectedHitsinEv << " hits" << " in event " << iEvent << endl;
413 //" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
414 cout << ntotalsdigitsinEv << " digits have been created \n";
415 cout << "(" << nsignalsdigitsinEv << " due to signals and " << nnoisesdigitsinEv << " due to border effect) \n";
416 cout << ntotalupdatesinEv << " total updates of the hit map have been performed in current event \n";
417 cout << "---------------------------------------- \n";
420 } //event loop on events
422 fTOFLoader->UnloadSDigits();
423 fTOFLoader->UnloadHits();
424 fRunLoader->UnloadKinematics();
425 //fRunLoader->UnloadgAlice();
433 nHitsFromSec=nselectedHits-nHitsFromPrim;
434 if(strstr(verboseOption,"all")){
435 cout << "---------------------------------------- \n";
436 cout << "---------------------------------------- \n";
437 cout << "-----------SDigitization Summary-------- \n";
438 cout << " <AliTOFSDigitizer> \n";
439 cout << "After sdigitizing " << nselectedHits << " hits \n";
440 cout << "in " << (fEvent2-fEvent1) << " events \n";
441 //" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
442 cout << ntotalsdigits << " sdigits have been created \n";
443 cout << "(" << nsignalsdigits << " due to signals and "
444 << nnoisesdigits << " due to border effect) \n";
445 cout << ntotalupdates << " total updates of the hit map have been performed \n";
446 cout << "in " << nlargeTofDiff << " cases the time of flight difference is greater than 200 ps \n";
450 if(strstr(verboseOption,"tim") || strstr(verboseOption,"all")){
451 gBenchmark->Stop("TOFSDigitizer");
452 cout << "AliTOFSDigitizer: \n";
453 cout << " took " << gBenchmark->GetCpuTime("TOFSDigitizer") << " seconds in order to make sdigits "
454 << gBenchmark->GetCpuTime("TOFSDigitizer")/(fEvent2-fEvent1) << " seconds per event \n";
455 cout << " +++++++++++++++++++++++++++++++++++++++++++++++++++ \n";
460 //__________________________________________________________________
461 void AliTOFSDigitizer::Print(Option_t* /*opt*/)const
463 cout << "------------------- "<< GetName() << " ------------- \n";
466 //__________________________________________________________________
467 void AliTOFSDigitizer::SelectSectorAndPlate(Int_t sector, Int_t plate)
469 Bool_t isaWrongSelection=(sector < 0) || (sector >= AliTOFGeometry::NSectors()) || (plate < 0) || (plate >= AliTOFGeometry::NPlates());
470 if(isaWrongSelection){
471 cout << "You have selected an invalid value for sector or plate " << endl;
472 cout << "The correct range for sector is [0,"<< AliTOFGeometry::NSectors()-1 <<"]\n";
473 cout << "The correct range for plate is [0,"<< AliTOFGeometry::NPlates()-1 <<"]\n";
474 cout << "By default we continue sdigitizing all hits in all plates of all sectors \n";
476 fSelectedSector=sector;
477 fSelectedPlate =plate;
478 cout << "SDigitizing only hits in plate " << fSelectedPlate << " of the sector "
479 << fSelectedSector << endl;
483 //__________________________________________________________________
484 void AliTOFSDigitizer::SimulateDetectorResponse(Float_t z0, Float_t x0, Float_t geantTime, Int_t& nActivatedPads, Int_t& nFiredPads, Bool_t* isFired, Int_t* nPlace, Float_t* qInduced, Float_t* tofTime, Float_t& averageTime)
487 // Input: z0, x0 - hit position in the strip system (0,0 - center of the strip), cm
488 // geantTime - time generated by Geant, ns
489 // Output: nActivatedPads - the number of pads activated by the hit (1 || 2 || 4)
490 // nFiredPads - the number of pads fired (really activated) by the hit (nFiredPads <= nActivatedPads)
491 // qInduced[iPad]- charge induced on pad, arb. units
492 // this array is initialized at zero by the caller
493 // tofAfterSimul[iPad] - time calculated with edge effect algorithm, ns
494 // this array is initialized at zero by the caller
495 // averageTime - time given by pad hited by the Geant track taking into account the times (weighted) given by the pads fired for edge effect also.
496 // The weight is given by the qInduced[iPad]/qCenterPad
497 // this variable is initialized at zero by the caller
498 // nPlace[iPad] - the number of the pad place, iPad = 0, 1, 2, 3
499 // this variable is initialized at zero by the caller
501 // Description of used variables:
502 // eff[iPad] - efficiency of the pad
503 // res[iPad] - resolution of the pad, ns
504 // timeWalk[iPad] - time walk of the pad, ns
505 // timeDelay[iPad] - time delay for neighbouring pad to hited pad, ns
506 // PadId[iPad] - Pad Identifier
507 // E | F --> PadId[iPad] = 5 | 6
508 // A | B --> PadId[iPad] = 1 | 2
509 // C | D --> PadId[iPad] = 3 | 4
510 // nTail[iPad] - the tail number, = 1 for tailA, = 2 for tailB
511 // qCenterPad - charge extimated for each pad, arb. units
512 // weightsSum - sum of weights extimated for each pad fired, arb. units
514 const Float_t kSigmaForTail[2] = {AliTOFGeometry::SigmaForTail1(),AliTOFGeometry::SigmaForTail2()}; //for tail
515 Int_t iz = 0, ix = 0;
516 Float_t dX = 0., dZ = 0., x = 0., z = 0.;
517 Float_t h = fHparameter, h2 = fH2parameter, k = fKparameter, k2 = fK2parameter;
518 Float_t effX = 0., effZ = 0., resX = 0., resZ = 0., timeWalkX = 0., timeWalkZ = 0.;
519 Float_t logOfqInd = 0.;
520 Float_t weightsSum = 0.;
521 Int_t nTail[4] = {0,0,0,0};
522 Int_t padId[4] = {0,0,0,0};
523 Float_t eff[4] = {0.,0.,0.,0.};
524 Float_t res[4] = {0.,0.,0.,0.};
525 // Float_t qCenterPad = fMinimumCharge * fMinimumCharge;
526 Float_t qCenterPad = 1.;
527 Float_t timeWalk[4] = {0.,0.,0.,0.};
528 Float_t timeDelay[4] = {0.,0.,0.,0.};
533 (z0 <= 0) ? iz = 0 : iz = 1;
534 dZ = z0 + (0.5 * AliTOFGeometry::NpadZ() - iz - 0.5) * AliTOFGeometry::ZPad(); // hit position in the pad frame, (0,0) - center of the pad
535 z = 0.5 * AliTOFGeometry::ZPad() - TMath::Abs(dZ); // variable for eff., res. and timeWalk. functions
536 iz++; // z row: 1, ..., AliTOFGeometry::NpadZ = 2
537 ix = (Int_t)((x0 + 0.5 * AliTOFGeometry::NpadX() * AliTOFGeometry::XPad()) / AliTOFGeometry::XPad());
538 dX = x0 + (0.5 * AliTOFGeometry::NpadX() - ix - 0.5) * AliTOFGeometry::XPad(); // hit position in the pad frame, (0,0) - center of the pad
539 x = 0.5 * AliTOFGeometry::XPad() - TMath::Abs(dX); // variable for eff., res. and timeWalk. functions;
540 ix++; // x row: 1, ..., AliTOFGeometry::NpadX = 48
544 nPlace[nActivatedPads-1] = (iz - 1) * AliTOFGeometry::NpadX() + ix;
545 qInduced[nActivatedPads-1] = qCenterPad;
546 padId[nActivatedPads-1] = 1;
548 if (fEdgeEffect == 0) {
549 eff[nActivatedPads-1] = fEffCenter;
550 if (gRandom->Rndm() < eff[nActivatedPads-1]) {
552 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + fResCenter * fResCenter); // 10400=30^2+20^2+40^2+50^2+50^2+50^2 ns;
553 isFired[nActivatedPads-1] = kTRUE;
554 tofTime[nActivatedPads-1] = gRandom->Gaus(geantTime + fTimeWalkCenter, res[0]);
555 averageTime = tofTime[nActivatedPads-1];
561 effZ = fEffBoundary + (fEff2Boundary - fEffBoundary) * z / h2;
563 effZ = fEff2Boundary + (fEffCenter - fEff2Boundary) * (z - h2) / (h - h2);
565 resZ = fResBoundary + (fResCenter - fResBoundary) * z / h;
566 timeWalkZ = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * z / h;
567 nTail[nActivatedPads-1] = 1;
571 timeWalkZ = fTimeWalkCenter;
576 effX = fEffBoundary + (fEff2Boundary - fEffBoundary) * x / h2;
578 effX = fEff2Boundary + (fEffCenter - fEff2Boundary) * (x - h2) / (h - h2);
580 resX = fResBoundary + (fResCenter - fResBoundary) * x / h;
581 timeWalkX = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * x / h;
582 nTail[nActivatedPads-1] = 1;
586 timeWalkX = fTimeWalkCenter;
589 (effZ<effX) ? eff[nActivatedPads-1] = effZ : eff[nActivatedPads-1] = effX;
590 (resZ<resX) ? res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resX * resX) : res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resZ * resZ); // 10400=30^2+20^2+40^2+50^2+50^2+50^2 ns
591 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
596 effZ = fEffBoundary - (fEffBoundary - fEff3Boundary) * (z / k2);
598 effZ = fEff3Boundary * (k - z) / (k - k2);
600 resZ = fResBoundary + fResSlope * z / k;
601 timeWalkZ = fTimeWalkBoundary + fTimeWalkSlope * z / k;
604 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
606 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX();
607 eff[nActivatedPads-1] = effZ;
608 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resZ * resZ); // 10400=30^2+20^2+40^2+50^2+50^2+50^2 ns
609 timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ; // ns
610 nTail[nActivatedPads-1] = 2;
611 if (fTimeDelayFlag) {
612 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
613 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
614 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
615 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
616 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
618 timeDelay[nActivatedPads-1] = 0.;
620 padId[nActivatedPads-1] = 2;
625 ////// Pad C, D, E, F:
627 effX = fEffBoundary - (fEffBoundary - fEff3Boundary) * (x / k2);
629 effX = fEff3Boundary * (k - x) / (k - k2);
631 resX = fResBoundary + fResSlope*x/k;
632 timeWalkX = fTimeWalkBoundary + fTimeWalkSlope*x/k;
636 if(ix > 1 && dX < 0) {
638 nPlace[nActivatedPads-1] = nPlace[0] - 1;
639 eff[nActivatedPads-1] = effX;
640 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resX * resX); // 10400=30^2+20^2+40^2+50^2+50^2+50^2 ns
641 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
642 nTail[nActivatedPads-1] = 2;
643 if (fTimeDelayFlag) {
644 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
645 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
646 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
647 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
648 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
650 timeDelay[nActivatedPads-1] = 0.;
652 padId[nActivatedPads-1] = 3;
656 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
658 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX() - 1;
659 eff[nActivatedPads-1] = effX * effZ;
660 (resZ<resX) ? res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resX * resX) : res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resZ * resZ); // 10400=30^2+20^2+40^2+50^2+50^2+50^2 ns
661 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
663 nTail[nActivatedPads-1] = 2;
664 if (fTimeDelayFlag) {
665 if (TMath::Abs(x) < TMath::Abs(z)) {
666 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
667 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
668 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
669 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
671 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
672 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
673 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
674 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
676 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
678 timeDelay[nActivatedPads-1] = 0.;
680 padId[nActivatedPads-1] = 4;
686 if(ix < AliTOFGeometry::NpadX() && dX > 0) {
688 nPlace[nActivatedPads-1] = nPlace[0] + 1;
689 eff[nActivatedPads-1] = effX;
690 res[nActivatedPads-1] = 0.001 * (TMath::Sqrt(10400 + resX * resX)); // ns
691 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
692 nTail[nActivatedPads-1] = 2;
693 if (fTimeDelayFlag) {
694 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
695 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
696 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
697 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
698 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
700 timeDelay[nActivatedPads-1] = 0.;
702 padId[nActivatedPads-1] = 5;
707 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
709 nPlace[nActivatedPads - 1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX() + 1;
710 eff[nActivatedPads - 1] = effX * effZ;
711 (resZ<resX) ? res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resX * resX) : res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resZ * resZ); // 10400=30^2+20^2+40^2+50^2+50^2+50^2 ns
712 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001*timeWalkX; // ns
713 nTail[nActivatedPads-1] = 2;
714 if (fTimeDelayFlag) {
715 if (TMath::Abs(x) < TMath::Abs(z)) {
716 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
717 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
718 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
719 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
721 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
722 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
723 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
724 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
726 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
728 timeDelay[nActivatedPads-1] = 0.;
730 padId[nActivatedPads-1] = 6;
737 for (Int_t iPad = 0; iPad < nActivatedPads; iPad++) {
738 if (res[iPad] < fTimeResolution) res[iPad] = fTimeResolution;
739 if(gRandom->Rndm() < eff[iPad]) {
740 isFired[iPad] = kTRUE;
743 if(nTail[iPad] == 0) {
744 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
746 ftail->SetParameters(res[iPad], 2. * res[iPad], kSigmaForTail[nTail[iPad]-1]);
747 Double_t timeAB = ftail->GetRandom();
748 tofTime[iPad] = geantTime + timeWalk[iPad] + timeDelay[iPad] + timeAB;
751 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
753 if (fAverageTimeFlag) {
754 averageTime += tofTime[iPad] * qInduced[iPad];
755 weightsSum += qInduced[iPad];
757 averageTime += tofTime[iPad];
762 if (weightsSum!=0) averageTime /= weightsSum;
763 } // end else (fEdgeEffect != 0)
766 //__________________________________________________________________
767 void AliTOFSDigitizer::PrintParameters()const
770 // Print parameters used for sdigitization
772 cout << " ------------------- "<< GetName() << " -------------" << endl ;
773 cout << " Parameters used for TOF SDigitization " << endl ;
774 // Printing the parameters
776 cout << " Number of events: " << (fEvent2-fEvent1) << endl;
777 cout << " from event " << fEvent1 << " to event " << (fEvent2-1) << endl;
778 cout << " Time Resolution (ns) "<< fTimeResolution <<" Pad Efficiency: "<< fpadefficiency << endl;
779 cout << " Edge Effect option: "<< fEdgeEffect<< endl;
781 cout << " Boundary Effect Simulation Parameters " << endl;
782 cout << " Hparameter: "<< fHparameter<<" H2parameter:"<< fH2parameter <<" Kparameter:"<< fKparameter<<" K2parameter: "<< fK2parameter << endl;
783 cout << " Efficiency in the central region of the pad: "<< fEffCenter << endl;
784 cout << " Efficiency at the boundary region of the pad: "<< fEffBoundary << endl;
785 cout << " Efficiency value at H2parameter "<< fEff2Boundary << endl;
786 cout << " Efficiency value at K2parameter "<< fEff3Boundary << endl;
787 cout << " Resolution (ps) in the central region of the pad: "<< fResCenter << endl;
788 cout << " Resolution (ps) at the boundary of the pad : "<< fResBoundary << endl;
789 cout << " Slope (ps/K) for neighbouring pad : "<< fResSlope <<endl;
790 cout << " Time walk (ps) in the central region of the pad : "<< fTimeWalkCenter << endl;
791 cout << " Time walk (ps) at the boundary of the pad : "<< fTimeWalkBoundary<< endl;
792 cout << " Slope (ps/K) for neighbouring pad : "<< fTimeWalkSlope<<endl;
793 cout << " Pulse Heigth Simulation Parameters " << endl;
794 cout << " Flag for delay due to the PulseHeightEffect: "<< fTimeDelayFlag <<endl;
795 cout << " Pulse Height Slope : "<< fPulseHeightSlope<<endl;
796 cout << " Time Delay Slope : "<< fTimeDelaySlope<<endl;
797 cout << " Minimum charge amount which could be induced : "<< fMinimumCharge<<endl;
798 cout << " Smearing in charge in (q1/q2) vs x plot : "<< fChargeSmearing<<endl;
799 cout << " Smearing in log of charge ratio : "<< fLogChargeSmearing<<endl;
800 cout << " Smearing in time in time vs log(q1/q2) plot : "<< fTimeSmearing<<endl;
801 cout << " Flag for average time : "<< fAverageTimeFlag<<endl;
802 cout << " Edge tails option : "<< fEdgeTails << endl;