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 //__________________________________________________________//
20 // This is a TTask that constructs SDigits out of Hits //
21 // A Summable Digits is the "sum" of all hits in a pad //
22 // Detector response has been simulated via the method //
23 // SimulateDetectorResponse //
25 // -- Authors: F. Pierella, A. De Caro //
26 // Use case: see AliTOFhits2sdigits.C macro in the CVS //
27 //__________________________________________________________//
29 #include <TBenchmark.h>
30 #include <TClonesArray.h>
33 #include <TParticle.h>
38 #include "AliLoader.h"
41 #include "AliRunLoader.h"
44 #include "AliTOFGeometry.h"
45 #include "AliTOFHitMap.h"
46 #include "AliTOFhitT0.h"
47 #include "AliTOFhit.h"
48 #include "AliTOFSDigitizer.h"
49 #include "AliTOFSDigit.h"
54 ClassImp(AliTOFSDigitizer)
56 //____________________________________________________________________________
57 AliTOFSDigitizer::AliTOFSDigitizer():
58 TTask("TOFSDigitizer",""),
91 fLogChargeSmearing(0),
101 //------------------------------------------------------------------------
102 AliTOFSDigitizer::AliTOFSDigitizer(const AliTOFSDigitizer &source):
129 fTimeWalkBoundary(0),
132 fPulseHeightSlope(0),
136 fLogChargeSmearing(0),
138 fAverageTimeFlag(-1),
144 //this->fTOFGeometry=source.fTOFGeometry;
148 //____________________________________________________________________________
149 AliTOFSDigitizer& AliTOFSDigitizer::operator=(const AliTOFSDigitizer &/*source*/)
156 //____________________________________________________________________________
157 AliTOFSDigitizer::AliTOFSDigitizer(const char* HeaderFile, Int_t evNumber1, Int_t nEvents):
158 TTask("TOFSDigitizer",""),
162 fHeadersFile(HeaderFile), // input filename (with hits)
165 fSelectedSector(-1), // by default we sdigitize all sectors
166 fSelectedPlate(-1), // by default we sdigitize all plates in all sectors
184 fTimeWalkBoundary(0),
187 fPulseHeightSlope(0),
191 fLogChargeSmearing(0),
193 fAverageTimeFlag(-1),
198 //ctor, reading from input file
200 TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data());
202 //File was not opened yet open file and get alirun object
204 file = TFile::Open(fHeadersFile.Data(),"update") ;
205 gAlice = (AliRun *) file->Get("gAlice") ;
208 // add Task to //root/Tasks folder
209 TString evfoldname = AliConfig::GetDefaultEventFolderName();
210 fRunLoader = AliRunLoader::GetRunLoader(evfoldname);
212 fRunLoader = AliRunLoader::Open(HeaderFile);//open session and mount on default event folder
213 if (fRunLoader == 0x0)
215 AliFatal("Event is not loaded. Exiting");
220 fRunLoader->CdGAFile();
221 TDirectory *savedir=gDirectory;
222 TFile *in=(TFile*)gFile;
225 // when fTOFGeometry was needed
227 AliWarning("Geometry file is not open default TOF geometry will be used");
228 fTOFGeometry = new AliTOFGeometry();
232 fTOFGeometry = (AliTOFGeometry*)in->Get("TOFgeometry");
237 if (fRunLoader->TreeE() == 0x0) fRunLoader->LoadHeader();
239 if (evNumber1>=0) fEvent1 = evNumber1;
242 if (nEvents==0) fEvent2 = (Int_t)(fRunLoader->GetNumberOfEvents());
243 else if (nEvents>0) fEvent2 = evNumber1+nEvents;
246 if (!(fEvent2>fEvent1)) {
247 AliError(Form("fEvent2 = %d <= fEvent1 = %d", fEvent2, fEvent1));
250 AliError(Form("Correction: fEvent2 = %d <= fEvent1 = %d", fEvent2, fEvent1));
253 // init parameters for sdigitization
256 fTOFLoader = fRunLoader->GetLoader("TOFLoader");
257 if (fTOFLoader == 0x0)
259 AliFatal("Can not find TOF loader in event. Exiting.");
262 fTOFLoader->PostSDigitizer(this);
265 //____________________________________________________________________________
266 AliTOFSDigitizer::~AliTOFSDigitizer()
269 fTOFLoader->CleanSDigitizer();
273 //____________________________________________________________________________
274 void AliTOFSDigitizer::InitParameters()
276 // set parameters for detector simulation
278 fTimeResolution = 0.080; //0.120; OLD
279 fpadefficiency = 0.99 ;
286 fEffCenter = fpadefficiency;
288 fEff2Boundary = 0.90;
289 fEff3Boundary = 0.08;
290 fAddTRes = 68. ; // \sqrt{2x20^2 + 15^2 + 2x10^2 + 30^2 + 50^2} (p-p)
291 //fAddTRes = 48. ; // \sqrt{2x20^2 + 15^2 + 2x10^2 + 30^2 + 15^2} (Pb-Pb)
292 // 30^2+20^2+40^2+50^2+50^2+50^2 = 10400 ps^2 (very old value)
293 fResCenter = 35. ; //50. ; // OLD
295 fResSlope = 37. ; //40. ; // OLD
296 fTimeWalkCenter = 0. ;
297 fTimeWalkBoundary=0. ;
298 fTimeWalkSlope = 0. ;
300 fPulseHeightSlope=2.0 ;
301 fTimeDelaySlope =0.060;
302 // was fMinimumCharge = TMath::Exp(fPulseHeightSlope*fKparameter/2.);
303 fMinimumCharge = TMath::Exp(-fPulseHeightSlope*fHparameter);
304 fChargeSmearing=0.0 ;
305 fLogChargeSmearing=0.13;
306 fTimeSmearing =0.022;
309 fAdcBin = 0.25; // 1 ADC bin = 0.25 pC (or 0.03 pC)
310 fAdcMean = 50.; // ADC distribution mpv value for Landau (in bins)
311 // it corresponds to a mean value of ~100 bins
312 fAdcRms = 25.; // ADC distribution rms value (in bins)
313 // it corresponds to distribution rms ~50 bins
316 //__________________________________________________________________
317 Double_t TimeWithTail(Double_t* x, Double_t* par)
319 // sigma - par[0], alpha - par[1], part - par[2]
320 // at x<part*sigma - gauss
321 // at x>part*sigma - TMath::Exp(-x/alpha)
324 if(xx<par[0]*par[2]) {
325 f = TMath::Exp(-xx*xx/(2*par[0]*par[0]));
327 f = TMath::Exp(-(xx-par[0]*par[2])/par[1]-0.5*par[2]*par[2]);
332 //____________________________________________________________________________
333 void AliTOFSDigitizer::Exec(Option_t *verboseOption) {
334 //execute TOF sdigitization
335 if (strstr(verboseOption,"tim") || strstr(verboseOption,"all"))
336 gBenchmark->Start("TOFSDigitizer");
338 if (fEdgeTails) ftail = new TF1("tail",TimeWithTail,-2,2,3);
340 Int_t nselectedHits=0;
341 Int_t ntotalsdigits=0;
342 Int_t ntotalupdates=0;
343 Int_t nnoisesdigits=0;
344 Int_t nsignalsdigits=0;
345 Int_t nHitsFromPrim=0;
346 Int_t nHitsFromSec=0;
347 Int_t nlargeTofDiff=0;
349 Bool_t thereIsNotASelection=(fSelectedSector==-1) && (fSelectedPlate==-1);
351 if (fRunLoader->GetAliRun() == 0x0) fRunLoader->LoadgAlice();
352 gAlice = fRunLoader->GetAliRun();
354 fRunLoader->LoadKinematics();
356 AliTOF *tof = (AliTOF *) gAlice->GetDetector("TOF");
359 AliError("TOF not found");
363 fTOFLoader->LoadHits("read");
364 fTOFLoader->LoadSDigits("recreate");
366 for (Int_t iEvent=fEvent1; iEvent<fEvent2; iEvent++) {
367 //AliInfo(Form("------------------- %s -------------", GetName()));
368 //AliInfo(Form("Sdigitizing event %i", iEvent));
370 fRunLoader->GetEvent(iEvent);
372 TTree *hitTree = fTOFLoader->TreeH ();
373 if (!hitTree) return;
375 if (fTOFLoader->TreeS () == 0) fTOFLoader->MakeTree ("S");
377 //Make branch for digits
378 tof->MakeBranch("S");
380 // recreate TClonesArray fSDigits - for backward compatibility
381 if (tof->SDigits() == 0) {
382 tof->CreateSDigitsArray();
384 tof->RecreateSDigitsArray();
387 tof->SetTreeAddress();
389 Int_t version=tof->IsVersion();
391 Int_t nselectedHitsinEv=0;
392 Int_t ntotalsdigitsinEv=0;
393 Int_t ntotalupdatesinEv=0;
394 Int_t nnoisesdigitsinEv=0;
395 Int_t nsignalsdigitsinEv=0;
399 TClonesArray *tofHitArray = tof->Hits();
402 // AliTOFHitMap *hitMap = new AliTOFHitMap(tof->SDigits(), fTOFGeometry);
403 AliTOFHitMap *hitMap = new AliTOFHitMap(tof->SDigits());
405 TBranch * tofHitsBranch = hitTree->GetBranch("TOF");
407 Int_t ntracks = static_cast<Int_t>(hitTree->GetEntries());
408 for (Int_t track = 0; track < ntracks; track++)
410 gAlice->GetMCApp()->ResetHits();
411 tofHitsBranch->GetEvent(track);
413 AliMC *mcApplication = (AliMC*)gAlice->GetMCApp();
415 particle = mcApplication->Particle(track);
416 Int_t nhits = tofHitArray->GetEntriesFast();
417 // cleaning all hits of the same track in the same pad volume
418 // it is a rare event, however it happens
420 Int_t previousTrack =-1;
421 Int_t previousSector=-1;
422 Int_t previousPlate =-1;
423 Int_t previousStrip =-1;
424 Int_t previousPadX =-1;
425 Int_t previousPadZ =-1;
427 for (Int_t hit = 0; hit < nhits; hit++) {
428 Int_t vol[5]; // location for a digit
429 Int_t digit[2]; // TOF digit variables
435 // fp: really sorry for this, it is a temporary trick to have
437 if (version<6) { //(version!=6 && version!=7)
438 AliTOFhit *tofHit = (AliTOFhit *) tofHitArray->UncheckedAt(hit);
439 tracknum = tofHit->GetTrack();
440 vol[0] = tofHit->GetSector();
441 vol[1] = tofHit->GetPlate();
442 vol[2] = tofHit->GetStrip();
443 vol[3] = tofHit->GetPadx();
444 vol[4] = tofHit->GetPadz();
445 dxPad = tofHit->GetDx();
446 dzPad = tofHit->GetDz();
447 geantTime = tofHit->GetTof(); // unit [s]
449 AliTOFhitT0 *tofHit = (AliTOFhitT0 *) tofHitArray->UncheckedAt(hit);
450 tracknum = tofHit->GetTrack();
451 vol[0] = tofHit->GetSector();
452 vol[1] = tofHit->GetPlate();
453 vol[2] = tofHit->GetStrip();
454 vol[3] = tofHit->GetPadx();
455 vol[4] = tofHit->GetPadz();
456 dxPad = tofHit->GetDx();
457 dzPad = tofHit->GetDz();
458 geantTime = tofHit->GetTof(); // unit [s]
461 geantTime *= 1.e+09; // conversion from [s] to [ns]
462 // TOF matching window (~200ns) control
463 if (geantTime>=AliTOFGeometry::MatchingWindow()*1E-3) {
464 AliDebug(2,Form("Time measurement (%f) greater than the matching window (%f)",
465 geantTime, AliTOFGeometry::MatchingWindow()*1E-3));
469 // selection case for sdigitizing only hits in a given plate of a given sector
470 if(thereIsNotASelection || (vol[0]==fSelectedSector && vol[1]==fSelectedPlate)){
472 Bool_t dummy=((tracknum==previousTrack) && (vol[0]==previousSector) && (vol[1]==previousPlate) && (vol[2]==previousStrip));
474 Bool_t isCloneOfThePrevious=dummy && ((vol[3]==previousPadX) && (vol[4]==previousPadZ));
476 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))));
478 if(!isCloneOfThePrevious && !isNeighOfThePrevious){
479 // update "previous" values
480 // in fact, we are yet in the future, so the present is past
481 previousTrack=tracknum;
482 previousSector=vol[0];
483 previousPlate=vol[1];
484 previousStrip=vol[2];
490 if (particle->GetFirstMother() < 0) nHitsFromPrim++; // counts hits due to primary particles
492 Float_t xStrip=AliTOFGeometry::XPad()*(vol[3]+0.5-0.5*AliTOFGeometry::NpadX())+dxPad;
493 Float_t zStrip=AliTOFGeometry::ZPad()*(vol[4]+0.5-0.5*AliTOFGeometry::NpadZ())+dzPad;
495 Int_t nActivatedPads = 0, nFiredPads = 0;
496 Bool_t isFired[4] = {kFALSE, kFALSE, kFALSE, kFALSE};
497 Float_t tofAfterSimul[4] = {0., 0., 0., 0.};
498 Float_t qInduced[4] = {0.,0.,0.,0.};
499 Int_t nPlace[4] = {0, 0, 0, 0};
500 Float_t averageTime = 0.;
501 SimulateDetectorResponse(zStrip,xStrip,geantTime,nActivatedPads,nFiredPads,isFired,nPlace,qInduced,tofAfterSimul,averageTime);
503 for(Int_t indexOfPad=0; indexOfPad<nActivatedPads; indexOfPad++) {
504 if(isFired[indexOfPad]){ // the pad has fired
505 Float_t timediff=geantTime-tofAfterSimul[indexOfPad];
507 // TOF matching window (~200ns) control
508 if (tofAfterSimul[indexOfPad]>=AliTOFGeometry::MatchingWindow()*1E-3) {
509 AliDebug(2,Form("Time measurement (%f) greater than the matching window (%f)",
510 tofAfterSimul[indexOfPad], AliTOFGeometry::MatchingWindow()*1E-3));
514 if(timediff>=0.2) nlargeTofDiff++; // greater than 200ps
516 digit[0] = (Int_t) ((tofAfterSimul[indexOfPad]*1.e+03)/AliTOFGeometry::TdcBinWidth()); // TDC bin number (each bin -> 24.4 ps)
518 Float_t landauFactor = gRandom->Landau(fAdcMean, fAdcRms);
519 digit[1] = (Int_t) (qInduced[indexOfPad] * landauFactor); // ADC bins (each bin -> 0.25 (or 0.03) pC)
521 // recalculate the volume only for neighbouring pads
523 (nPlace[indexOfPad]<=AliTOFGeometry::NpadX()) ? vol[4] = 0 : vol[4] = 1;
524 (nPlace[indexOfPad]<=AliTOFGeometry::NpadX()) ? vol[3] = nPlace[indexOfPad] - 1 : vol[3] = nPlace[indexOfPad] - AliTOFGeometry::NpadX() - 1;
526 // check if two sdigit are on the same pad;
527 // in that case we sum the two or more sdigits
528 if (hitMap->TestHit(vol) != kEmpty) {
529 AliTOFSDigit *sdig = static_cast<AliTOFSDigit*>(hitMap->GetHit(vol));
530 Int_t tdctime = (Int_t) digit[0];
531 Int_t adccharge = (Int_t) digit[1];
532 sdig->Update(AliTOFGeometry::TdcBinWidth(),tdctime,adccharge,tracknum);
537 tof->AddSDigit(tracknum, vol, digit);
544 nsignalsdigitsinEv++;
549 } // if (hitMap->TestHit(vol) != kEmpty)
550 } // if(isFired[indexOfPad])
551 } // end loop on nActivatedPads
552 } // if(nFiredPads) i.e. if some pads has fired
553 } // close if(!isCloneOfThePrevious)
554 } // close the selection on sector and plate
555 } // end loop on hits for the current track
556 } // end loop on ntracks
560 fTOFLoader->TreeS()->Reset();
561 fTOFLoader->TreeS()->Fill();
562 fTOFLoader->WriteSDigits("OVERWRITE");
564 if (tof->SDigits()) tof->ResetSDigits();
566 if (strstr(verboseOption,"all") || strstr(verboseOption,"partial")) {
567 AliDebug(2,"----------------------------------------");
568 AliDebug(2,Form("After sdigitizing %d hits in event %d", nselectedHitsinEv, iEvent));
569 //" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
570 AliInfo(Form("%d sdigits have been created", ntotalsdigitsinEv));
571 AliDebug(2,Form("(%d due to signals and %d due to border effect)", nsignalsdigitsinEv, nnoisesdigitsinEv));
572 AliDebug(2,Form("%d total updates of the hit map have been performed in current event", ntotalupdatesinEv));
573 AliDebug(2,"----------------------------------------");
576 } //event loop on events
578 fTOFLoader->UnloadSDigits();
579 fTOFLoader->UnloadHits();
580 fRunLoader->UnloadKinematics();
581 //fRunLoader->UnloadgAlice();
589 nHitsFromSec=nselectedHits-nHitsFromPrim;
590 if (strstr(verboseOption,"all") || strstr(verboseOption,"partial")) {
591 AliDebug(2,"----------------------------------------");
592 AliDebug(2,Form("After sdigitizing %d hits in %d events ", nselectedHits, fEvent2-fEvent1));
593 //" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
594 AliDebug(2,Form("%d sdigits have been created", ntotalsdigits));
595 AliDebug(2,Form("(%d due to signals and %d due to border effect)", nsignalsdigits, nnoisesdigits));
596 AliDebug(2,Form("%d total updates of the hit map have been performed", ntotalupdates));
597 AliDebug(2,Form("in %d cases the time of flight difference is greater than 200 ps", nlargeTofDiff));
598 AliDebug(2,"----------------------------------------");
602 if(strstr(verboseOption,"tim") || strstr(verboseOption,"all")){
603 gBenchmark->Stop("TOFSDigitizer");
604 AliInfo("AliTOFSDigitizer:");
605 AliInfo(Form(" took %f seconds in order to make sdigits "
606 "%f seconds per event", gBenchmark->GetCpuTime("TOFSDigitizer"), gBenchmark->GetCpuTime("TOFSDigitizer")/(fEvent2-fEvent1)));
607 AliInfo(" +++++++++++++++++++++++++++++++++++++++++++++++++++ ");
612 //__________________________________________________________________
613 void AliTOFSDigitizer::Print(Option_t* /*opt*/)const
615 AliInfo(Form(" ------------------- %s ------------- ", GetName()));
618 //__________________________________________________________________
619 void AliTOFSDigitizer::SelectSectorAndPlate(Int_t sector, Int_t plate)
621 //Select sector and plate
622 Bool_t isaWrongSelection=(sector < 0) || (sector >= AliTOFGeometry::NSectors()) || (plate < 0) || (plate >= AliTOFGeometry::NPlates());
623 if(isaWrongSelection){
624 AliError("You have selected an invalid value for sector or plate ");
625 AliError(Form("The correct range for sector is [0,%d]", AliTOFGeometry::NSectors()-1));
626 AliError(Form("The correct range for plate is [0,%d]", AliTOFGeometry::NPlates()-1));
627 AliError("By default we continue sdigitizing all hits in all plates of all sectors");
629 fSelectedSector=sector;
630 fSelectedPlate =plate;
631 AliInfo(Form("SDigitizing only hits in plate %d of the sector %d", fSelectedPlate, fSelectedSector));
635 //__________________________________________________________________
636 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)
639 // Input: z0, x0 - hit position in the strip system (0,0 - center of the strip), cm
640 // geantTime - time generated by Geant, ns
641 // Output: nActivatedPads - the number of pads activated by the hit (1 || 2 || 4)
642 // nFiredPads - the number of pads fired (really activated) by the hit (nFiredPads <= nActivatedPads)
643 // qInduced[iPad]- charge induced on pad, arb. units
644 // this array is initialized at zero by the caller
645 // tofAfterSimul[iPad] - time calculated with edge effect algorithm, ns
646 // this array is initialized at zero by the caller
647 // 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.
648 // The weight is given by the qInduced[iPad]/qCenterPad
649 // this variable is initialized at zero by the caller
650 // nPlace[iPad] - the number of the pad place, iPad = 0, 1, 2, 3
651 // this variable is initialized at zero by the caller
653 // Description of used variables:
654 // eff[iPad] - efficiency of the pad
655 // res[iPad] - resolution of the pad, ns
656 // timeWalk[iPad] - time walk of the pad, ns
657 // timeDelay[iPad] - time delay for neighbouring pad to hited pad, ns
658 // PadId[iPad] - Pad Identifier
659 // E | F --> PadId[iPad] = 5 | 6
660 // A | B --> PadId[iPad] = 1 | 2
661 // C | D --> PadId[iPad] = 3 | 4
662 // nTail[iPad] - the tail number, = 1 for tailA, = 2 for tailB
663 // qCenterPad - charge extimated for each pad, arb. units
664 // weightsSum - sum of weights extimated for each pad fired, arb. units
666 const Float_t kSigmaForTail[2] = {AliTOFGeometry::SigmaForTail1(),AliTOFGeometry::SigmaForTail2()}; //for tail
667 Int_t iz = 0, ix = 0;
668 Float_t dX = 0., dZ = 0., x = 0., z = 0.;
669 Float_t h = fHparameter, h2 = fH2parameter, k = fKparameter, k2 = fK2parameter;
670 Float_t effX = 0., effZ = 0., resX = 0., resZ = 0., timeWalkX = 0., timeWalkZ = 0.;
671 Float_t logOfqInd = 0.;
672 Float_t weightsSum = 0.;
673 Int_t nTail[4] = {0,0,0,0};
674 Int_t padId[4] = {0,0,0,0};
675 Float_t eff[4] = {0.,0.,0.,0.};
676 Float_t res[4] = {0.,0.,0.,0.};
677 // Float_t qCenterPad = fMinimumCharge * fMinimumCharge;
678 Float_t qCenterPad = 1.;
679 Float_t timeWalk[4] = {0.,0.,0.,0.};
680 Float_t timeDelay[4] = {0.,0.,0.,0.};
685 (z0 <= 0) ? iz = 0 : iz = 1;
686 dZ = z0 + (0.5 * AliTOFGeometry::NpadZ() - iz - 0.5) * AliTOFGeometry::ZPad(); // hit position in the pad frame, (0,0) - center of the pad
687 z = 0.5 * AliTOFGeometry::ZPad() - TMath::Abs(dZ); // variable for eff., res. and timeWalk. functions
688 iz++; // z row: 1, ..., AliTOFGeometry::NpadZ = 2
689 ix = (Int_t)((x0 + 0.5 * AliTOFGeometry::NpadX() * AliTOFGeometry::XPad()) / AliTOFGeometry::XPad());
690 dX = x0 + (0.5 * AliTOFGeometry::NpadX() - ix - 0.5) * AliTOFGeometry::XPad(); // hit position in the pad frame, (0,0) - center of the pad
691 x = 0.5 * AliTOFGeometry::XPad() - TMath::Abs(dX); // variable for eff., res. and timeWalk. functions;
692 ix++; // x row: 1, ..., AliTOFGeometry::NpadX = 48
696 nPlace[nActivatedPads-1] = (iz - 1) * AliTOFGeometry::NpadX() + ix;
697 qInduced[nActivatedPads-1] = qCenterPad;
698 padId[nActivatedPads-1] = 1;
700 if (fEdgeEffect == 0) {
701 eff[nActivatedPads-1] = fEffCenter;
702 if (gRandom->Rndm() < eff[nActivatedPads-1]) {
704 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + fResCenter * fResCenter); // ns
705 isFired[nActivatedPads-1] = kTRUE;
706 tofTime[nActivatedPads-1] = gRandom->Gaus(geantTime + fTimeWalkCenter, res[0]);
707 averageTime = tofTime[nActivatedPads-1];
713 effZ = fEffBoundary + (fEff2Boundary - fEffBoundary) * z / h2;
715 effZ = fEff2Boundary + (fEffCenter - fEff2Boundary) * (z - h2) / (h - h2);
717 resZ = fResBoundary + (fResCenter - fResBoundary) * z / h;
718 timeWalkZ = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * z / h;
719 nTail[nActivatedPads-1] = 1;
723 timeWalkZ = fTimeWalkCenter;
728 effX = fEffBoundary + (fEff2Boundary - fEffBoundary) * x / h2;
730 effX = fEff2Boundary + (fEffCenter - fEff2Boundary) * (x - h2) / (h - h2);
732 resX = fResBoundary + (fResCenter - fResBoundary) * x / h;
733 timeWalkX = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * x / h;
734 nTail[nActivatedPads-1] = 1;
738 timeWalkX = fTimeWalkCenter;
741 (effZ<effX) ? eff[nActivatedPads-1] = effZ : eff[nActivatedPads-1] = effX;
742 (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
743 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
748 effZ = fEffBoundary - (fEffBoundary - fEff3Boundary) * (z / k2);
750 effZ = fEff3Boundary * (k - z) / (k - k2);
752 resZ = fResBoundary + fResSlope * z / k;
753 timeWalkZ = fTimeWalkBoundary + fTimeWalkSlope * z / k;
756 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
758 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX();
759 eff[nActivatedPads-1] = effZ;
760 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resZ * resZ); // ns
761 timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ; // ns
762 nTail[nActivatedPads-1] = 2;
763 if (fTimeDelayFlag) {
764 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
765 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
766 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
767 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
768 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
770 timeDelay[nActivatedPads-1] = 0.;
772 padId[nActivatedPads-1] = 2;
777 ////// Pad C, D, E, F:
779 effX = fEffBoundary - (fEffBoundary - fEff3Boundary) * (x / k2);
781 effX = fEff3Boundary * (k - x) / (k - k2);
783 resX = fResBoundary + fResSlope*x/k;
784 timeWalkX = fTimeWalkBoundary + fTimeWalkSlope*x/k;
788 if(ix > 1 && dX < 0) {
790 nPlace[nActivatedPads-1] = nPlace[0] - 1;
791 eff[nActivatedPads-1] = effX;
792 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resX * resX); // ns
793 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
794 nTail[nActivatedPads-1] = 2;
795 if (fTimeDelayFlag) {
796 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
797 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
798 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
799 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
800 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
802 timeDelay[nActivatedPads-1] = 0.;
804 padId[nActivatedPads-1] = 3;
808 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
810 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX() - 1;
811 eff[nActivatedPads-1] = effX * effZ;
812 (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
813 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
815 nTail[nActivatedPads-1] = 2;
816 if (fTimeDelayFlag) {
817 if (TMath::Abs(x) < TMath::Abs(z)) {
818 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
819 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
820 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
821 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
823 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
824 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
825 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
826 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
828 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
830 timeDelay[nActivatedPads-1] = 0.;
832 padId[nActivatedPads-1] = 4;
838 if(ix < AliTOFGeometry::NpadX() && dX > 0) {
840 nPlace[nActivatedPads-1] = nPlace[0] + 1;
841 eff[nActivatedPads-1] = effX;
842 res[nActivatedPads-1] = 0.001 * (TMath::Sqrt(fAddTRes*fAddTRes + resX * resX)); // ns
843 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
844 nTail[nActivatedPads-1] = 2;
845 if (fTimeDelayFlag) {
846 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
847 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
848 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
849 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
850 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
852 timeDelay[nActivatedPads-1] = 0.;
854 padId[nActivatedPads-1] = 5;
859 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
861 nPlace[nActivatedPads - 1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX() + 1;
862 eff[nActivatedPads - 1] = effX * effZ;
863 (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
864 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001*timeWalkX; // ns
865 nTail[nActivatedPads-1] = 2;
866 if (fTimeDelayFlag) {
867 if (TMath::Abs(x) < TMath::Abs(z)) {
868 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
869 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
870 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
871 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
873 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
874 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
875 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
876 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
878 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
880 timeDelay[nActivatedPads-1] = 0.;
882 padId[nActivatedPads-1] = 6;
889 for (Int_t iPad = 0; iPad < nActivatedPads; iPad++) {
890 if (res[iPad] < fTimeResolution) res[iPad] = fTimeResolution;
891 if(gRandom->Rndm() < eff[iPad]) {
892 isFired[iPad] = kTRUE;
895 if(nTail[iPad] == 0) {
896 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
898 ftail->SetParameters(res[iPad], 2. * res[iPad], kSigmaForTail[nTail[iPad]-1]);
899 Double_t timeAB = ftail->GetRandom();
900 tofTime[iPad] = geantTime + timeWalk[iPad] + timeDelay[iPad] + timeAB;
903 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
905 if (fAverageTimeFlag) {
906 averageTime += tofTime[iPad] * qInduced[iPad];
907 weightsSum += qInduced[iPad];
909 averageTime += tofTime[iPad];
914 if (weightsSum!=0) averageTime /= weightsSum;
915 } // end else (fEdgeEffect != 0)
918 //__________________________________________________________________
919 void AliTOFSDigitizer::PrintParameters()const
922 // Print parameters used for sdigitization
924 AliInfo(Form(" ------------------- %s -------------", GetName()));
925 AliInfo(" Parameters used for TOF SDigitization ");
926 // Printing the parameters
928 AliInfo(Form(" Number of events: %i ", (fEvent2-fEvent1)));
929 AliInfo(Form(" from event %i to event %i", fEvent1, (fEvent2-1)));
930 AliInfo(Form(" Time Resolution (ns) %d Pad Efficiency: %d ", fTimeResolution, fpadefficiency));
931 AliInfo(Form(" Edge Effect option: %d", fEdgeEffect));
933 AliInfo(" Boundary Effect Simulation Parameters ");
934 AliInfo(Form(" Hparameter: %d H2parameter: %d Kparameter: %d K2parameter: %d", fHparameter, fH2parameter, fKparameter, fK2parameter));
935 AliInfo(Form(" Efficiency in the central region of the pad: %d", fEffCenter));
936 AliInfo(Form(" Efficiency at the boundary region of the pad: %d", fEffBoundary));
937 AliInfo(Form(" Efficiency value at H2parameter %d", fEff2Boundary));
938 AliInfo(Form(" Efficiency value at K2parameter %d", fEff3Boundary));
939 AliInfo(Form(" Resolution (ps) in the central region of the pad: %d", fResCenter));
940 AliInfo(Form(" Resolution (ps) at the boundary of the pad : %d", fResBoundary));
941 AliInfo(Form(" Slope (ps/K) for neighbouring pad : %d", fResSlope));
942 AliInfo(Form(" Time walk (ps) in the central region of the pad : %d", fTimeWalkCenter));
943 AliInfo(Form(" Time walk (ps) at the boundary of the pad : %d", fTimeWalkBoundary));
944 AliInfo(Form(" Slope (ps/K) for neighbouring pad : %d", fTimeWalkSlope));
945 AliInfo(" Pulse Heigth Simulation Parameters ");
946 AliInfo(Form(" Flag for delay due to the PulseHeightEffect : %d", fTimeDelayFlag));
947 AliInfo(Form(" Pulse Height Slope : %d", fPulseHeightSlope));
948 AliInfo(Form(" Time Delay Slope : %d", fTimeDelaySlope));
949 AliInfo(Form(" Minimum charge amount which could be induced : %d", fMinimumCharge));
950 AliInfo(Form(" Smearing in charge in (q1/q2) vs x plot : %d", fChargeSmearing));
951 AliInfo(Form(" Smearing in log of charge ratio : %d", fLogChargeSmearing));
952 AliInfo(Form(" Smearing in time in time vs log(q1/q2) plot : %d", fTimeSmearing));
953 AliInfo(Form(" Flag for average time : %d", fAverageTimeFlag));
954 AliInfo(Form(" Edge tails option : %d", fEdgeTails));