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>
43 #include "AliDetector.h"
44 #include "AliLoader.h"
47 #include "AliRunLoader.h"
50 #include "AliTOFGeometry.h"
51 #include "AliTOFHitMap.h"
52 #include "AliTOFSDigit.h"
53 #include "AliTOFSDigitizer.h"
54 #include "AliTOFhit.h"
55 #include "AliTOFhitT0.h"
57 ClassImp(AliTOFSDigitizer)
59 //____________________________________________________________________________
60 AliTOFSDigitizer::AliTOFSDigitizer():TTask("TOFSDigitizer","")
73 fTOFGeometry = new AliTOFGeometry();
77 //____________________________________________________________________________
78 AliTOFSDigitizer::AliTOFSDigitizer(const char* HeaderFile, Int_t evNumber1, Int_t nEvents):TTask("TOFSDigitizer","")
80 //ctor, reading from input file
82 fSelectedSector=-1; // by default we sdigitize all sectors
83 fSelectedPlate =-1; // by default we sdigitize all plates in all sectors
85 fHeadersFile = HeaderFile ; // input filename (with hits)
86 TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data());
88 //File was not opened yet open file and get alirun object
90 file = TFile::Open(fHeadersFile.Data(),"update") ;
91 gAlice = (AliRun *) file->Get("gAlice") ;
94 // add Task to //root/Tasks folder
95 TString evfoldname = AliConfig::GetDefaultEventFolderName();
96 fRunLoader = AliRunLoader::GetRunLoader(evfoldname);
98 fRunLoader = AliRunLoader::Open(HeaderFile);//open session and mount on default event folder
99 if (fRunLoader == 0x0)
101 AliFatal("Event is not loaded. Exiting");
105 fRunLoader->CdGAFile();
106 TDirectory *savedir=gDirectory;
107 TFile *in=(TFile*)gFile;
110 AliWarning("Geometry file is not open default TOF geometry will be used");
111 fTOFGeometry = new AliTOFGeometry();
115 fTOFGeometry = (AliTOFGeometry*)in->Get("TOFgeometry");
120 if (fRunLoader->TreeE() == 0x0) fRunLoader->LoadHeader();
122 if (evNumber1>=0) fEvent1 = evNumber1;
125 if (nEvents==0) fEvent2 = (Int_t)(fRunLoader->GetNumberOfEvents());
126 else if (nEvents>0) fEvent2 = evNumber1+nEvents;
129 if (!(fEvent2>fEvent1)) {
130 AliError(Form("fEvent2 = %d <= fEvent1 = %d", fEvent2, fEvent1));
133 AliError(Form("Correction: fEvent2 = %d <= fEvent1 = %d", fEvent2, fEvent1));
136 // init parameters for sdigitization
139 fTOFLoader = fRunLoader->GetLoader("TOFLoader");
140 if (fTOFLoader == 0x0)
142 AliFatal("Can not find TOF loader in event. Exiting.");
145 fTOFLoader->PostSDigitizer(this);
148 //____________________________________________________________________________
149 AliTOFSDigitizer::~AliTOFSDigitizer()
152 fTOFLoader->CleanSDigitizer();
158 //____________________________________________________________________________
159 void AliTOFSDigitizer::InitParameters()
161 // set parameters for detector simulation
163 fTimeResolution = 0.080; //0.120; OLD
164 fpadefficiency = 0.99 ;
171 fEffCenter = fpadefficiency;
173 fEff2Boundary = 0.90;
174 fEff3Boundary = 0.08;
175 fAddTRes = 68. ; // \sqrt{2x20^2 + 15^2 + 2x10^2 + 30^2 + 50^2} (p-p)
176 //fAddTRes = 48. ; // \sqrt{2x20^2 + 15^2 + 2x10^2 + 30^2 + 15^2} (Pb-Pb)
177 // 30^2+20^2+40^2+50^2+50^2+50^2 = 10400 ps^2 (very old value)
178 fResCenter = 35. ; //50. ; // OLD
180 fResSlope = 37. ; //40. ; // OLD
181 fTimeWalkCenter = 0. ;
182 fTimeWalkBoundary=0. ;
183 fTimeWalkSlope = 0. ;
185 fPulseHeightSlope=2.0 ;
186 fTimeDelaySlope =0.060;
187 // was fMinimumCharge = TMath::Exp(fPulseHeightSlope*fKparameter/2.);
188 fMinimumCharge = TMath::Exp(-fPulseHeightSlope*fHparameter);
189 fChargeSmearing=0.0 ;
190 fLogChargeSmearing=0.13;
191 fTimeSmearing =0.022;
194 fAdcBin = 0.25; // 1 ADC bin = 0.25 pC (or 0.03 pC)
195 fAdcMean = 50.; // ADC distribution mpv value for Landau (in bins)
196 // it corresponds to a mean value of ~100 bins
197 fAdcRms = 25.; // ADC distribution rms value (in bins)
198 // it corresponds to distribution rms ~50 bins
201 //__________________________________________________________________
202 Double_t TimeWithTail(Double_t* x, Double_t* par)
204 // sigma - par[0], alpha - par[1], part - par[2]
205 // at x<part*sigma - gauss
206 // at x>part*sigma - TMath::Exp(-x/alpha)
209 if(xx<par[0]*par[2]) {
210 f = TMath::Exp(-xx*xx/(2*par[0]*par[0]));
212 f = TMath::Exp(-(xx-par[0]*par[2])/par[1]-0.5*par[2]*par[2]);
217 //____________________________________________________________________________
218 void AliTOFSDigitizer::Exec(Option_t *verboseOption) {
219 //execute TOF sdigitization
220 if (strstr(verboseOption,"tim") || strstr(verboseOption,"all"))
221 gBenchmark->Start("TOFSDigitizer");
223 if (fEdgeTails) ftail = new TF1("tail",TimeWithTail,-2,2,3);
225 Int_t nselectedHits=0;
226 Int_t ntotalsdigits=0;
227 Int_t ntotalupdates=0;
228 Int_t nnoisesdigits=0;
229 Int_t nsignalsdigits=0;
230 Int_t nHitsFromPrim=0;
231 Int_t nHitsFromSec=0;
232 Int_t nlargeTofDiff=0;
234 Bool_t thereIsNotASelection=(fSelectedSector==-1) && (fSelectedPlate==-1);
236 if (fRunLoader->GetAliRun() == 0x0) fRunLoader->LoadgAlice();
237 gAlice = fRunLoader->GetAliRun();
239 fRunLoader->LoadKinematics();
241 AliTOF *tof = (AliTOF *) gAlice->GetDetector("TOF");
244 AliError("TOF not found");
248 fTOFLoader->LoadHits("read");
249 fTOFLoader->LoadSDigits("recreate");
251 for (Int_t iEvent=fEvent1; iEvent<fEvent2; iEvent++) {
252 // cout << "------------------- "<< GetName() << " ------------- \n";
253 // cout << "Sdigitizing event " << iEvent << endl;
255 fRunLoader->GetEvent(iEvent);
257 TTree *hitTree = fTOFLoader->TreeH ();
258 if (!hitTree) return;
260 if (fTOFLoader->TreeS () == 0) fTOFLoader->MakeTree ("S");
262 //Make branch for digits
263 tof->MakeBranch("S");
265 // recreate TClonesArray fSDigits - for backward compatibility
266 if (tof->SDigits() == 0) {
267 tof->CreateSDigitsArray();
269 tof->RecreateSDigitsArray();
272 tof->SetTreeAddress();
274 Int_t version=tof->IsVersion();
276 Int_t nselectedHitsinEv=0;
277 Int_t ntotalsdigitsinEv=0;
278 Int_t ntotalupdatesinEv=0;
279 Int_t nnoisesdigitsinEv=0;
280 Int_t nsignalsdigitsinEv=0;
284 TClonesArray *tofHitArray = tof->Hits();
287 AliTOFHitMap *hitMap = new AliTOFHitMap(tof->SDigits(), fTOFGeometry);
289 TBranch * tofHitsBranch = hitTree->GetBranch("TOF");
291 Int_t ntracks = static_cast<Int_t>(hitTree->GetEntries());
292 for (Int_t track = 0; track < ntracks; track++)
295 tofHitsBranch->GetEvent(track);
296 particle = gAlice->GetMCApp()->Particle(track);
297 Int_t nhits = tofHitArray->GetEntriesFast();
298 // cleaning all hits of the same track in the same pad volume
299 // it is a rare event, however it happens
301 Int_t previousTrack =-1;
302 Int_t previousSector=-1;
303 Int_t previousPlate =-1;
304 Int_t previousStrip =-1;
305 Int_t previousPadX =-1;
306 Int_t previousPadZ =-1;
308 for (Int_t hit = 0; hit < nhits; hit++) {
309 Int_t vol[5]; // location for a digit
310 Float_t digit[2]; // TOF digit variables
316 // fp: really sorry for this, it is a temporary trick to have
318 if(version!=6 && version!=7){
319 AliTOFhit *tofHit = (AliTOFhit *) tofHitArray->UncheckedAt(hit);
320 tracknum = tofHit->GetTrack();
321 vol[0] = tofHit->GetSector();
322 vol[1] = tofHit->GetPlate();
323 vol[2] = tofHit->GetStrip();
324 vol[3] = tofHit->GetPadx();
325 vol[4] = tofHit->GetPadz();
326 dxPad = tofHit->GetDx();
327 dzPad = tofHit->GetDz();
328 geantTime = tofHit->GetTof(); // unit [s]
330 AliTOFhitT0 *tofHit = (AliTOFhitT0 *) tofHitArray->UncheckedAt(hit);
331 tracknum = tofHit->GetTrack();
332 vol[0] = tofHit->GetSector();
333 vol[1] = tofHit->GetPlate();
334 vol[2] = tofHit->GetStrip();
335 vol[3] = tofHit->GetPadx();
336 vol[4] = tofHit->GetPadz();
337 dxPad = tofHit->GetDx();
338 dzPad = tofHit->GetDz();
339 geantTime = tofHit->GetTof(); // unit [s]
342 geantTime *= 1.e+09; // conversion from [s] to [ns]
344 // selection case for sdigitizing only hits in a given plate of a given sector
345 if(thereIsNotASelection || (vol[0]==fSelectedSector && vol[1]==fSelectedPlate)){
347 Bool_t dummy=((tracknum==previousTrack) && (vol[0]==previousSector) && (vol[1]==previousPlate) && (vol[2]==previousStrip));
349 Bool_t isCloneOfThePrevious=dummy && ((vol[3]==previousPadX) && (vol[4]==previousPadZ));
351 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))));
353 if(!isCloneOfThePrevious && !isNeighOfThePrevious){
354 // update "previous" values
355 // in fact, we are yet in the future, so the present is past
356 previousTrack=tracknum;
357 previousSector=vol[0];
358 previousPlate=vol[1];
359 previousStrip=vol[2];
365 if (particle->GetFirstMother() < 0) nHitsFromPrim++; // counts hits due to primary particles
367 Float_t xStrip=AliTOFGeometry::XPad()*(vol[3]+0.5-0.5*AliTOFGeometry::NpadX())+dxPad;
368 Float_t zStrip=AliTOFGeometry::ZPad()*(vol[4]+0.5-0.5*AliTOFGeometry::NpadZ())+dzPad;
370 Int_t nActivatedPads = 0, nFiredPads = 0;
371 Bool_t isFired[4] = {kFALSE, kFALSE, kFALSE, kFALSE};
372 Float_t tofAfterSimul[4] = {0., 0., 0., 0.};
373 Float_t qInduced[4] = {0.,0.,0.,0.};
374 Int_t nPlace[4] = {0, 0, 0, 0};
375 Float_t averageTime = 0.;
376 SimulateDetectorResponse(zStrip,xStrip,geantTime,nActivatedPads,nFiredPads,isFired,nPlace,qInduced,tofAfterSimul,averageTime);
378 for(Int_t indexOfPad=0; indexOfPad<nActivatedPads; indexOfPad++) {
379 if(isFired[indexOfPad]){ // the pad has fired
380 Float_t timediff=geantTime-tofAfterSimul[indexOfPad];
382 if(timediff>=0.2) nlargeTofDiff++;
384 digit[0] = (Int_t) ((tofAfterSimul[indexOfPad]*1.e+03)/AliTOFGeometry::TdcBinWidth()); // TDC bin number (each bin -> 24.4 ps)
386 Float_t landauFactor = gRandom->Landau(fAdcMean, fAdcRms);
387 digit[1] = (Int_t) (qInduced[indexOfPad] * landauFactor); // ADC bins (each bin -> 0.25 (or 0.03) pC)
389 // recalculate the volume only for neighbouring pads
391 (nPlace[indexOfPad]<=AliTOFGeometry::NpadX()) ? vol[4] = 0 : vol[4] = 1;
392 (nPlace[indexOfPad]<=AliTOFGeometry::NpadX()) ? vol[3] = nPlace[indexOfPad] - 1 : vol[3] = nPlace[indexOfPad] - AliTOFGeometry::NpadX() - 1;
394 // check if two sdigit are on the same pad;
395 // in that case we sum the two or more sdigits
396 if (hitMap->TestHit(vol) != kEmpty) {
397 AliTOFSDigit *sdig = static_cast<AliTOFSDigit*>(hitMap->GetHit(vol));
398 Int_t tdctime = (Int_t) digit[0];
399 Int_t adccharge = (Int_t) digit[1];
400 sdig->Update(AliTOFGeometry::TdcBinWidth(),tdctime,adccharge,tracknum);
405 tof->AddSDigit(tracknum, vol, digit);
412 nsignalsdigitsinEv++;
417 } // if (hitMap->TestHit(vol) != kEmpty)
418 } // if(isFired[indexOfPad])
419 } // end loop on nActivatedPads
420 } // if(nFiredPads) i.e. if some pads has fired
421 } // close if(!isCloneOfThePrevious)
422 } // close the selection on sector and plate
423 } // end loop on hits for the current track
424 } // end loop on ntracks
428 fTOFLoader->TreeS()->Reset();
429 fTOFLoader->TreeS()->Fill();
430 fTOFLoader->WriteSDigits("OVERWRITE");
432 if (tof->SDigits()) tof->ResetSDigits();
434 if (strstr(verboseOption,"all")) {
435 AliInfo("----------------------------------------");
436 AliInfo(" <AliTOFSDigitizer> ");
437 AliInfo(Form("After sdigitizing %d hits in event %d", nselectedHitsinEv, iEvent));
438 //" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
439 AliInfo(Form("%d digits have been created", ntotalsdigitsinEv));
440 AliInfo(Form("(%d due to signals and %d due to border effect)", nsignalsdigitsinEv, nnoisesdigitsinEv));
441 AliInfo(Form("%d total updates of the hit map have been performed in current event", ntotalupdatesinEv));
442 AliInfo("----------------------------------------");
445 } //event loop on events
447 fTOFLoader->UnloadSDigits();
448 fTOFLoader->UnloadHits();
449 fRunLoader->UnloadKinematics();
450 //fRunLoader->UnloadgAlice();
458 nHitsFromSec=nselectedHits-nHitsFromPrim;
459 if(strstr(verboseOption,"all")){
460 AliInfo("----------------------------------------");
461 AliInfo("----------------------------------------");
462 AliInfo("-----------SDigitization Summary--------");
463 AliInfo(" <AliTOFSDigitizer> ");
464 AliInfo(Form("After sdigitizing %d hits", nselectedHits));
465 AliInfo(Form("in %d events", fEvent2-fEvent1));
466 //" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
467 AliInfo(Form("%d sdigits have been created", ntotalsdigits));
468 AliInfo(Form("(%d due to signals and "
469 "%d due to border effect)", nsignalsdigits, nnoisesdigits));
470 AliInfo(Form("%d total updates of the hit map have been performed", ntotalupdates));
471 AliInfo(Form("in %d cases the time of flight difference is greater than 200 ps", nlargeTofDiff));
475 if(strstr(verboseOption,"tim") || strstr(verboseOption,"all")){
476 gBenchmark->Stop("TOFSDigitizer");
477 AliInfo("AliTOFSDigitizer:");
478 AliInfo(Form(" took %f seconds in order to make sdigits "
479 "%f seconds per event", gBenchmark->GetCpuTime("TOFSDigitizer"), gBenchmark->GetCpuTime("TOFSDigitizer")/(fEvent2-fEvent1)));
480 AliInfo(" +++++++++++++++++++++++++++++++++++++++++++++++++++ ");
485 //__________________________________________________________________
486 void AliTOFSDigitizer::Print(Option_t* /*opt*/)const
488 cout << "------------------- "<< GetName() << " ------------- \n";
491 //__________________________________________________________________
492 void AliTOFSDigitizer::SelectSectorAndPlate(Int_t sector, Int_t plate)
494 //Select sector and plate
495 Bool_t isaWrongSelection=(sector < 0) || (sector >= AliTOFGeometry::NSectors()) || (plate < 0) || (plate >= AliTOFGeometry::NPlates());
496 if(isaWrongSelection){
497 AliError("You have selected an invalid value for sector or plate ");
498 AliError(Form("The correct range for sector is [0,%d]", AliTOFGeometry::NSectors()-1));
499 AliError(Form("The correct range for plate is [0,%d]", AliTOFGeometry::NPlates()-1));
500 AliError("By default we continue sdigitizing all hits in all plates of all sectors");
502 fSelectedSector=sector;
503 fSelectedPlate =plate;
504 AliInfo(Form("SDigitizing only hits in plate %d of the sector %d", fSelectedPlate, fSelectedSector));
508 //__________________________________________________________________
509 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)
512 // Input: z0, x0 - hit position in the strip system (0,0 - center of the strip), cm
513 // geantTime - time generated by Geant, ns
514 // Output: nActivatedPads - the number of pads activated by the hit (1 || 2 || 4)
515 // nFiredPads - the number of pads fired (really activated) by the hit (nFiredPads <= nActivatedPads)
516 // qInduced[iPad]- charge induced on pad, arb. units
517 // this array is initialized at zero by the caller
518 // tofAfterSimul[iPad] - time calculated with edge effect algorithm, ns
519 // this array is initialized at zero by the caller
520 // 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.
521 // The weight is given by the qInduced[iPad]/qCenterPad
522 // this variable is initialized at zero by the caller
523 // nPlace[iPad] - the number of the pad place, iPad = 0, 1, 2, 3
524 // this variable is initialized at zero by the caller
526 // Description of used variables:
527 // eff[iPad] - efficiency of the pad
528 // res[iPad] - resolution of the pad, ns
529 // timeWalk[iPad] - time walk of the pad, ns
530 // timeDelay[iPad] - time delay for neighbouring pad to hited pad, ns
531 // PadId[iPad] - Pad Identifier
532 // E | F --> PadId[iPad] = 5 | 6
533 // A | B --> PadId[iPad] = 1 | 2
534 // C | D --> PadId[iPad] = 3 | 4
535 // nTail[iPad] - the tail number, = 1 for tailA, = 2 for tailB
536 // qCenterPad - charge extimated for each pad, arb. units
537 // weightsSum - sum of weights extimated for each pad fired, arb. units
539 const Float_t kSigmaForTail[2] = {AliTOFGeometry::SigmaForTail1(),AliTOFGeometry::SigmaForTail2()}; //for tail
540 Int_t iz = 0, ix = 0;
541 Float_t dX = 0., dZ = 0., x = 0., z = 0.;
542 Float_t h = fHparameter, h2 = fH2parameter, k = fKparameter, k2 = fK2parameter;
543 Float_t effX = 0., effZ = 0., resX = 0., resZ = 0., timeWalkX = 0., timeWalkZ = 0.;
544 Float_t logOfqInd = 0.;
545 Float_t weightsSum = 0.;
546 Int_t nTail[4] = {0,0,0,0};
547 Int_t padId[4] = {0,0,0,0};
548 Float_t eff[4] = {0.,0.,0.,0.};
549 Float_t res[4] = {0.,0.,0.,0.};
550 // Float_t qCenterPad = fMinimumCharge * fMinimumCharge;
551 Float_t qCenterPad = 1.;
552 Float_t timeWalk[4] = {0.,0.,0.,0.};
553 Float_t timeDelay[4] = {0.,0.,0.,0.};
558 (z0 <= 0) ? iz = 0 : iz = 1;
559 dZ = z0 + (0.5 * AliTOFGeometry::NpadZ() - iz - 0.5) * AliTOFGeometry::ZPad(); // hit position in the pad frame, (0,0) - center of the pad
560 z = 0.5 * AliTOFGeometry::ZPad() - TMath::Abs(dZ); // variable for eff., res. and timeWalk. functions
561 iz++; // z row: 1, ..., AliTOFGeometry::NpadZ = 2
562 ix = (Int_t)((x0 + 0.5 * AliTOFGeometry::NpadX() * AliTOFGeometry::XPad()) / AliTOFGeometry::XPad());
563 dX = x0 + (0.5 * AliTOFGeometry::NpadX() - ix - 0.5) * AliTOFGeometry::XPad(); // hit position in the pad frame, (0,0) - center of the pad
564 x = 0.5 * AliTOFGeometry::XPad() - TMath::Abs(dX); // variable for eff., res. and timeWalk. functions;
565 ix++; // x row: 1, ..., AliTOFGeometry::NpadX = 48
569 nPlace[nActivatedPads-1] = (iz - 1) * AliTOFGeometry::NpadX() + ix;
570 qInduced[nActivatedPads-1] = qCenterPad;
571 padId[nActivatedPads-1] = 1;
573 if (fEdgeEffect == 0) {
574 eff[nActivatedPads-1] = fEffCenter;
575 if (gRandom->Rndm() < eff[nActivatedPads-1]) {
577 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + fResCenter * fResCenter); // ns
578 isFired[nActivatedPads-1] = kTRUE;
579 tofTime[nActivatedPads-1] = gRandom->Gaus(geantTime + fTimeWalkCenter, res[0]);
580 averageTime = tofTime[nActivatedPads-1];
586 effZ = fEffBoundary + (fEff2Boundary - fEffBoundary) * z / h2;
588 effZ = fEff2Boundary + (fEffCenter - fEff2Boundary) * (z - h2) / (h - h2);
590 resZ = fResBoundary + (fResCenter - fResBoundary) * z / h;
591 timeWalkZ = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * z / h;
592 nTail[nActivatedPads-1] = 1;
596 timeWalkZ = fTimeWalkCenter;
601 effX = fEffBoundary + (fEff2Boundary - fEffBoundary) * x / h2;
603 effX = fEff2Boundary + (fEffCenter - fEff2Boundary) * (x - h2) / (h - h2);
605 resX = fResBoundary + (fResCenter - fResBoundary) * x / h;
606 timeWalkX = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * x / h;
607 nTail[nActivatedPads-1] = 1;
611 timeWalkX = fTimeWalkCenter;
614 (effZ<effX) ? eff[nActivatedPads-1] = effZ : eff[nActivatedPads-1] = effX;
615 (resZ<resX) ? res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resX * resX) : res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resZ * resZ); // ns
616 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
621 effZ = fEffBoundary - (fEffBoundary - fEff3Boundary) * (z / k2);
623 effZ = fEff3Boundary * (k - z) / (k - k2);
625 resZ = fResBoundary + fResSlope * z / k;
626 timeWalkZ = fTimeWalkBoundary + fTimeWalkSlope * z / k;
629 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
631 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX();
632 eff[nActivatedPads-1] = effZ;
633 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resZ * resZ); // ns
634 timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ; // ns
635 nTail[nActivatedPads-1] = 2;
636 if (fTimeDelayFlag) {
637 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
638 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
639 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
640 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
641 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
643 timeDelay[nActivatedPads-1] = 0.;
645 padId[nActivatedPads-1] = 2;
650 ////// Pad C, D, E, F:
652 effX = fEffBoundary - (fEffBoundary - fEff3Boundary) * (x / k2);
654 effX = fEff3Boundary * (k - x) / (k - k2);
656 resX = fResBoundary + fResSlope*x/k;
657 timeWalkX = fTimeWalkBoundary + fTimeWalkSlope*x/k;
661 if(ix > 1 && dX < 0) {
663 nPlace[nActivatedPads-1] = nPlace[0] - 1;
664 eff[nActivatedPads-1] = effX;
665 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resX * resX); // ns
666 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
667 nTail[nActivatedPads-1] = 2;
668 if (fTimeDelayFlag) {
669 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
670 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
671 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
672 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
673 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
675 timeDelay[nActivatedPads-1] = 0.;
677 padId[nActivatedPads-1] = 3;
681 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
683 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX() - 1;
684 eff[nActivatedPads-1] = effX * effZ;
685 (resZ<resX) ? res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resX * resX) : res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resZ * resZ); // ns
686 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
688 nTail[nActivatedPads-1] = 2;
689 if (fTimeDelayFlag) {
690 if (TMath::Abs(x) < TMath::Abs(z)) {
691 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
692 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
693 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
694 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
696 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
697 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
698 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
699 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
701 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
703 timeDelay[nActivatedPads-1] = 0.;
705 padId[nActivatedPads-1] = 4;
711 if(ix < AliTOFGeometry::NpadX() && dX > 0) {
713 nPlace[nActivatedPads-1] = nPlace[0] + 1;
714 eff[nActivatedPads-1] = effX;
715 res[nActivatedPads-1] = 0.001 * (TMath::Sqrt(fAddTRes*fAddTRes + resX * resX)); // ns
716 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
717 nTail[nActivatedPads-1] = 2;
718 if (fTimeDelayFlag) {
719 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
720 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
721 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
722 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
723 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
725 timeDelay[nActivatedPads-1] = 0.;
727 padId[nActivatedPads-1] = 5;
732 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
734 nPlace[nActivatedPads - 1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX() + 1;
735 eff[nActivatedPads - 1] = effX * effZ;
736 (resZ<resX) ? res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resX * resX) : res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resZ * resZ); // ns
737 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001*timeWalkX; // ns
738 nTail[nActivatedPads-1] = 2;
739 if (fTimeDelayFlag) {
740 if (TMath::Abs(x) < TMath::Abs(z)) {
741 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
742 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
743 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
744 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
746 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
747 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
748 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
749 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
751 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
753 timeDelay[nActivatedPads-1] = 0.;
755 padId[nActivatedPads-1] = 6;
762 for (Int_t iPad = 0; iPad < nActivatedPads; iPad++) {
763 if (res[iPad] < fTimeResolution) res[iPad] = fTimeResolution;
764 if(gRandom->Rndm() < eff[iPad]) {
765 isFired[iPad] = kTRUE;
768 if(nTail[iPad] == 0) {
769 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
771 ftail->SetParameters(res[iPad], 2. * res[iPad], kSigmaForTail[nTail[iPad]-1]);
772 Double_t timeAB = ftail->GetRandom();
773 tofTime[iPad] = geantTime + timeWalk[iPad] + timeDelay[iPad] + timeAB;
776 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
778 if (fAverageTimeFlag) {
779 averageTime += tofTime[iPad] * qInduced[iPad];
780 weightsSum += qInduced[iPad];
782 averageTime += tofTime[iPad];
787 if (weightsSum!=0) averageTime /= weightsSum;
788 } // end else (fEdgeEffect != 0)
791 //__________________________________________________________________
792 void AliTOFSDigitizer::PrintParameters()const
795 // Print parameters used for sdigitization
797 cout << " ------------------- "<< GetName() << " -------------" << endl ;
798 cout << " Parameters used for TOF SDigitization " << endl ;
799 // Printing the parameters
801 cout << " Number of events: " << (fEvent2-fEvent1) << endl;
802 cout << " from event " << fEvent1 << " to event " << (fEvent2-1) << endl;
803 cout << " Time Resolution (ns) "<< fTimeResolution <<" Pad Efficiency: "<< fpadefficiency << endl;
804 cout << " Edge Effect option: "<< fEdgeEffect<< endl;
806 cout << " Boundary Effect Simulation Parameters " << endl;
807 cout << " Hparameter: "<< fHparameter<<" H2parameter:"<< fH2parameter <<" Kparameter:"<< fKparameter<<" K2parameter: "<< fK2parameter << endl;
808 cout << " Efficiency in the central region of the pad: "<< fEffCenter << endl;
809 cout << " Efficiency at the boundary region of the pad: "<< fEffBoundary << endl;
810 cout << " Efficiency value at H2parameter "<< fEff2Boundary << endl;
811 cout << " Efficiency value at K2parameter "<< fEff3Boundary << endl;
812 cout << " Resolution (ps) in the central region of the pad: "<< fResCenter << endl;
813 cout << " Resolution (ps) at the boundary of the pad : "<< fResBoundary << endl;
814 cout << " Slope (ps/K) for neighbouring pad : "<< fResSlope <<endl;
815 cout << " Time walk (ps) in the central region of the pad : "<< fTimeWalkCenter << endl;
816 cout << " Time walk (ps) at the boundary of the pad : "<< fTimeWalkBoundary<< endl;
817 cout << " Slope (ps/K) for neighbouring pad : "<< fTimeWalkSlope<<endl;
818 cout << " Pulse Heigth Simulation Parameters " << endl;
819 cout << " Flag for delay due to the PulseHeightEffect : "<< fTimeDelayFlag <<endl;
820 cout << " Pulse Height Slope : "<< fPulseHeightSlope<<endl;
821 cout << " Time Delay Slope : "<< fTimeDelaySlope<<endl;
822 cout << " Minimum charge amount which could be induced : "<< fMinimumCharge<<endl;
823 cout << " Smearing in charge in (q1/q2) vs x plot : "<< fChargeSmearing<<endl;
824 cout << " Smearing in log of charge ratio : "<< fLogChargeSmearing<<endl;
825 cout << " Smearing in time in time vs log(q1/q2) plot : "<< fTimeSmearing<<endl;
826 cout << " Flag for average time : "<< fAverageTimeFlag<<endl;
827 cout << " Edge tails option : "<< fEdgeTails << endl;