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"
53 ClassImp(AliTOFSDigitizer)
55 //____________________________________________________________________________
56 AliTOFSDigitizer::AliTOFSDigitizer():
57 TTask("TOFSDigitizer",""),
64 fTOFGeometry(new AliTOFGeometry()),
91 fLogChargeSmearing(0),
101 //------------------------------------------------------------------------
102 AliTOFSDigitizer::AliTOFSDigitizer(const AliTOFSDigitizer &source):
130 fTimeWalkBoundary(0),
133 fPulseHeightSlope(0),
137 fLogChargeSmearing(0),
139 fAverageTimeFlag(-1),
145 this->fTOFGeometry=source.fTOFGeometry;
149 //____________________________________________________________________________
150 AliTOFSDigitizer& AliTOFSDigitizer::operator=(const AliTOFSDigitizer &source)
153 this->fTOFGeometry=source.fTOFGeometry;
158 //____________________________________________________________________________
159 AliTOFSDigitizer::AliTOFSDigitizer(const char* HeaderFile, Int_t evNumber1, Int_t nEvents):
160 TTask("TOFSDigitizer",""),
164 fHeadersFile(HeaderFile), // input filename (with hits)
168 fSelectedSector(-1), // by default we sdigitize all sectors
169 fSelectedPlate(-1), // by default we sdigitize all plates in all sectors
187 fTimeWalkBoundary(0),
190 fPulseHeightSlope(0),
194 fLogChargeSmearing(0),
196 fAverageTimeFlag(-1),
201 //ctor, reading from input file
203 TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data());
205 //File was not opened yet open file and get alirun object
207 file = TFile::Open(fHeadersFile.Data(),"update") ;
208 gAlice = (AliRun *) file->Get("gAlice") ;
211 // add Task to //root/Tasks folder
212 TString evfoldname = AliConfig::GetDefaultEventFolderName();
213 fRunLoader = AliRunLoader::GetRunLoader(evfoldname);
215 fRunLoader = AliRunLoader::Open(HeaderFile);//open session and mount on default event folder
216 if (fRunLoader == 0x0)
218 AliFatal("Event is not loaded. Exiting");
222 fRunLoader->CdGAFile();
223 TDirectory *savedir=gDirectory;
224 TFile *in=(TFile*)gFile;
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();
275 //____________________________________________________________________________
276 void AliTOFSDigitizer::InitParameters()
278 // set parameters for detector simulation
280 fTimeResolution = 0.080; //0.120; OLD
281 fpadefficiency = 0.99 ;
288 fEffCenter = fpadefficiency;
290 fEff2Boundary = 0.90;
291 fEff3Boundary = 0.08;
292 fAddTRes = 68. ; // \sqrt{2x20^2 + 15^2 + 2x10^2 + 30^2 + 50^2} (p-p)
293 //fAddTRes = 48. ; // \sqrt{2x20^2 + 15^2 + 2x10^2 + 30^2 + 15^2} (Pb-Pb)
294 // 30^2+20^2+40^2+50^2+50^2+50^2 = 10400 ps^2 (very old value)
295 fResCenter = 35. ; //50. ; // OLD
297 fResSlope = 37. ; //40. ; // OLD
298 fTimeWalkCenter = 0. ;
299 fTimeWalkBoundary=0. ;
300 fTimeWalkSlope = 0. ;
302 fPulseHeightSlope=2.0 ;
303 fTimeDelaySlope =0.060;
304 // was fMinimumCharge = TMath::Exp(fPulseHeightSlope*fKparameter/2.);
305 fMinimumCharge = TMath::Exp(-fPulseHeightSlope*fHparameter);
306 fChargeSmearing=0.0 ;
307 fLogChargeSmearing=0.13;
308 fTimeSmearing =0.022;
311 fAdcBin = 0.25; // 1 ADC bin = 0.25 pC (or 0.03 pC)
312 fAdcMean = 50.; // ADC distribution mpv value for Landau (in bins)
313 // it corresponds to a mean value of ~100 bins
314 fAdcRms = 25.; // ADC distribution rms value (in bins)
315 // it corresponds to distribution rms ~50 bins
318 //__________________________________________________________________
319 Double_t TimeWithTail(Double_t* x, Double_t* par)
321 // sigma - par[0], alpha - par[1], part - par[2]
322 // at x<part*sigma - gauss
323 // at x>part*sigma - TMath::Exp(-x/alpha)
326 if(xx<par[0]*par[2]) {
327 f = TMath::Exp(-xx*xx/(2*par[0]*par[0]));
329 f = TMath::Exp(-(xx-par[0]*par[2])/par[1]-0.5*par[2]*par[2]);
334 //____________________________________________________________________________
335 void AliTOFSDigitizer::Exec(Option_t *verboseOption) {
336 //execute TOF sdigitization
337 if (strstr(verboseOption,"tim") || strstr(verboseOption,"all"))
338 gBenchmark->Start("TOFSDigitizer");
340 if (fEdgeTails) ftail = new TF1("tail",TimeWithTail,-2,2,3);
342 Int_t nselectedHits=0;
343 Int_t ntotalsdigits=0;
344 Int_t ntotalupdates=0;
345 Int_t nnoisesdigits=0;
346 Int_t nsignalsdigits=0;
347 Int_t nHitsFromPrim=0;
348 Int_t nHitsFromSec=0;
349 Int_t nlargeTofDiff=0;
351 Bool_t thereIsNotASelection=(fSelectedSector==-1) && (fSelectedPlate==-1);
353 if (fRunLoader->GetAliRun() == 0x0) fRunLoader->LoadgAlice();
354 gAlice = fRunLoader->GetAliRun();
356 fRunLoader->LoadKinematics();
358 AliTOF *tof = (AliTOF *) gAlice->GetDetector("TOF");
361 AliError("TOF not found");
365 fTOFLoader->LoadHits("read");
366 fTOFLoader->LoadSDigits("recreate");
368 for (Int_t iEvent=fEvent1; iEvent<fEvent2; iEvent++) {
369 //AliInfo(Form("------------------- %s -------------", GetName()));
370 //AliInfo(Form("Sdigitizing event %i", iEvent));
372 fRunLoader->GetEvent(iEvent);
374 TTree *hitTree = fTOFLoader->TreeH ();
375 if (!hitTree) return;
377 if (fTOFLoader->TreeS () == 0) fTOFLoader->MakeTree ("S");
379 //Make branch for digits
380 tof->MakeBranch("S");
382 // recreate TClonesArray fSDigits - for backward compatibility
383 if (tof->SDigits() == 0) {
384 tof->CreateSDigitsArray();
386 tof->RecreateSDigitsArray();
389 tof->SetTreeAddress();
391 Int_t version=tof->IsVersion();
393 Int_t nselectedHitsinEv=0;
394 Int_t ntotalsdigitsinEv=0;
395 Int_t ntotalupdatesinEv=0;
396 Int_t nnoisesdigitsinEv=0;
397 Int_t nsignalsdigitsinEv=0;
401 TClonesArray *tofHitArray = tof->Hits();
404 AliTOFHitMap *hitMap = new AliTOFHitMap(tof->SDigits(), fTOFGeometry);
406 TBranch * tofHitsBranch = hitTree->GetBranch("TOF");
408 Int_t ntracks = static_cast<Int_t>(hitTree->GetEntries());
409 for (Int_t track = 0; track < ntracks; track++)
412 tofHitsBranch->GetEvent(track);
414 AliMC *mcApplication = (AliMC*)gAlice->GetMCApp();
416 particle = mcApplication->Particle(track);
417 Int_t nhits = tofHitArray->GetEntriesFast();
418 // cleaning all hits of the same track in the same pad volume
419 // it is a rare event, however it happens
421 Int_t previousTrack =-1;
422 Int_t previousSector=-1;
423 Int_t previousPlate =-1;
424 Int_t previousStrip =-1;
425 Int_t previousPadX =-1;
426 Int_t previousPadZ =-1;
428 for (Int_t hit = 0; hit < nhits; hit++) {
429 Int_t vol[5]; // location for a digit
430 Int_t digit[2]; // TOF digit variables
436 // fp: really sorry for this, it is a temporary trick to have
438 if (version<6) { //(version!=6 && version!=7)
439 AliTOFhit *tofHit = (AliTOFhit *) tofHitArray->UncheckedAt(hit);
440 tracknum = tofHit->GetTrack();
441 vol[0] = tofHit->GetSector();
442 vol[1] = tofHit->GetPlate();
443 vol[2] = tofHit->GetStrip();
444 vol[3] = tofHit->GetPadx();
445 vol[4] = tofHit->GetPadz();
446 dxPad = tofHit->GetDx();
447 dzPad = tofHit->GetDz();
448 geantTime = tofHit->GetTof(); // unit [s]
450 AliTOFhitT0 *tofHit = (AliTOFhitT0 *) tofHitArray->UncheckedAt(hit);
451 tracknum = tofHit->GetTrack();
452 vol[0] = tofHit->GetSector();
453 vol[1] = tofHit->GetPlate();
454 vol[2] = tofHit->GetStrip();
455 vol[3] = tofHit->GetPadx();
456 vol[4] = tofHit->GetPadz();
457 dxPad = tofHit->GetDx();
458 dzPad = tofHit->GetDz();
459 geantTime = tofHit->GetTof(); // unit [s]
462 geantTime *= 1.e+09; // conversion from [s] to [ns]
464 // selection case for sdigitizing only hits in a given plate of a given sector
465 if(thereIsNotASelection || (vol[0]==fSelectedSector && vol[1]==fSelectedPlate)){
467 Bool_t dummy=((tracknum==previousTrack) && (vol[0]==previousSector) && (vol[1]==previousPlate) && (vol[2]==previousStrip));
469 Bool_t isCloneOfThePrevious=dummy && ((vol[3]==previousPadX) && (vol[4]==previousPadZ));
471 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))));
473 if(!isCloneOfThePrevious && !isNeighOfThePrevious){
474 // update "previous" values
475 // in fact, we are yet in the future, so the present is past
476 previousTrack=tracknum;
477 previousSector=vol[0];
478 previousPlate=vol[1];
479 previousStrip=vol[2];
485 if (particle->GetFirstMother() < 0) nHitsFromPrim++; // counts hits due to primary particles
487 Float_t xStrip=AliTOFGeometry::XPad()*(vol[3]+0.5-0.5*AliTOFGeometry::NpadX())+dxPad;
488 Float_t zStrip=AliTOFGeometry::ZPad()*(vol[4]+0.5-0.5*AliTOFGeometry::NpadZ())+dzPad;
490 Int_t nActivatedPads = 0, nFiredPads = 0;
491 Bool_t isFired[4] = {kFALSE, kFALSE, kFALSE, kFALSE};
492 Float_t tofAfterSimul[4] = {0., 0., 0., 0.};
493 Float_t qInduced[4] = {0.,0.,0.,0.};
494 Int_t nPlace[4] = {0, 0, 0, 0};
495 Float_t averageTime = 0.;
496 SimulateDetectorResponse(zStrip,xStrip,geantTime,nActivatedPads,nFiredPads,isFired,nPlace,qInduced,tofAfterSimul,averageTime);
498 for(Int_t indexOfPad=0; indexOfPad<nActivatedPads; indexOfPad++) {
499 if(isFired[indexOfPad]){ // the pad has fired
500 Float_t timediff=geantTime-tofAfterSimul[indexOfPad];
502 if(timediff>=0.2) nlargeTofDiff++;
504 digit[0] = (Int_t) ((tofAfterSimul[indexOfPad]*1.e+03)/AliTOFGeometry::TdcBinWidth()); // TDC bin number (each bin -> 24.4 ps)
506 Float_t landauFactor = gRandom->Landau(fAdcMean, fAdcRms);
507 digit[1] = (Int_t) (qInduced[indexOfPad] * landauFactor); // ADC bins (each bin -> 0.25 (or 0.03) pC)
509 // recalculate the volume only for neighbouring pads
511 (nPlace[indexOfPad]<=AliTOFGeometry::NpadX()) ? vol[4] = 0 : vol[4] = 1;
512 (nPlace[indexOfPad]<=AliTOFGeometry::NpadX()) ? vol[3] = nPlace[indexOfPad] - 1 : vol[3] = nPlace[indexOfPad] - AliTOFGeometry::NpadX() - 1;
514 // check if two sdigit are on the same pad;
515 // in that case we sum the two or more sdigits
516 if (hitMap->TestHit(vol) != kEmpty) {
517 AliTOFSDigit *sdig = static_cast<AliTOFSDigit*>(hitMap->GetHit(vol));
518 Int_t tdctime = (Int_t) digit[0];
519 Int_t adccharge = (Int_t) digit[1];
520 sdig->Update(AliTOFGeometry::TdcBinWidth(),tdctime,adccharge,tracknum);
525 tof->AddSDigit(tracknum, vol, digit);
532 nsignalsdigitsinEv++;
537 } // if (hitMap->TestHit(vol) != kEmpty)
538 } // if(isFired[indexOfPad])
539 } // end loop on nActivatedPads
540 } // if(nFiredPads) i.e. if some pads has fired
541 } // close if(!isCloneOfThePrevious)
542 } // close the selection on sector and plate
543 } // end loop on hits for the current track
544 } // end loop on ntracks
548 fTOFLoader->TreeS()->Reset();
549 fTOFLoader->TreeS()->Fill();
550 fTOFLoader->WriteSDigits("OVERWRITE");
552 if (tof->SDigits()) tof->ResetSDigits();
554 if (strstr(verboseOption,"all")) {
555 AliInfo("----------------------------------------");
556 AliInfo(" <AliTOFSDigitizer> ");
557 AliInfo(Form("After sdigitizing %d hits in event %d", nselectedHitsinEv, iEvent));
558 //" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
559 AliInfo(Form("%d digits have been created", ntotalsdigitsinEv));
560 AliInfo(Form("(%d due to signals and %d due to border effect)", nsignalsdigitsinEv, nnoisesdigitsinEv));
561 AliInfo(Form("%d total updates of the hit map have been performed in current event", ntotalupdatesinEv));
562 AliInfo("----------------------------------------");
565 } //event loop on events
567 fTOFLoader->UnloadSDigits();
568 fTOFLoader->UnloadHits();
569 fRunLoader->UnloadKinematics();
570 //fRunLoader->UnloadgAlice();
578 nHitsFromSec=nselectedHits-nHitsFromPrim;
579 if(strstr(verboseOption,"all")){
580 AliInfo("----------------------------------------");
581 AliInfo("----------------------------------------");
582 AliInfo("-----------SDigitization Summary--------");
583 AliInfo(" <AliTOFSDigitizer> ");
584 AliInfo(Form("After sdigitizing %d hits", nselectedHits));
585 AliInfo(Form("in %d events", fEvent2-fEvent1));
586 //" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
587 AliInfo(Form("%d sdigits have been created", ntotalsdigits));
588 AliInfo(Form("(%d due to signals and "
589 "%d due to border effect)", nsignalsdigits, nnoisesdigits));
590 AliInfo(Form("%d total updates of the hit map have been performed", ntotalupdates));
591 AliInfo(Form("in %d cases the time of flight difference is greater than 200 ps", nlargeTofDiff));
595 if(strstr(verboseOption,"tim") || strstr(verboseOption,"all")){
596 gBenchmark->Stop("TOFSDigitizer");
597 AliInfo("AliTOFSDigitizer:");
598 AliInfo(Form(" took %f seconds in order to make sdigits "
599 "%f seconds per event", gBenchmark->GetCpuTime("TOFSDigitizer"), gBenchmark->GetCpuTime("TOFSDigitizer")/(fEvent2-fEvent1)));
600 AliInfo(" +++++++++++++++++++++++++++++++++++++++++++++++++++ ");
605 //__________________________________________________________________
606 void AliTOFSDigitizer::Print(Option_t* /*opt*/)const
608 AliInfo(Form(" ------------------- %s ------------- ", GetName()));
611 //__________________________________________________________________
612 void AliTOFSDigitizer::SelectSectorAndPlate(Int_t sector, Int_t plate)
614 //Select sector and plate
615 Bool_t isaWrongSelection=(sector < 0) || (sector >= AliTOFGeometry::NSectors()) || (plate < 0) || (plate >= AliTOFGeometry::NPlates());
616 if(isaWrongSelection){
617 AliError("You have selected an invalid value for sector or plate ");
618 AliError(Form("The correct range for sector is [0,%d]", AliTOFGeometry::NSectors()-1));
619 AliError(Form("The correct range for plate is [0,%d]", AliTOFGeometry::NPlates()-1));
620 AliError("By default we continue sdigitizing all hits in all plates of all sectors");
622 fSelectedSector=sector;
623 fSelectedPlate =plate;
624 AliInfo(Form("SDigitizing only hits in plate %d of the sector %d", fSelectedPlate, fSelectedSector));
628 //__________________________________________________________________
629 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)
632 // Input: z0, x0 - hit position in the strip system (0,0 - center of the strip), cm
633 // geantTime - time generated by Geant, ns
634 // Output: nActivatedPads - the number of pads activated by the hit (1 || 2 || 4)
635 // nFiredPads - the number of pads fired (really activated) by the hit (nFiredPads <= nActivatedPads)
636 // qInduced[iPad]- charge induced on pad, arb. units
637 // this array is initialized at zero by the caller
638 // tofAfterSimul[iPad] - time calculated with edge effect algorithm, ns
639 // this array is initialized at zero by the caller
640 // 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.
641 // The weight is given by the qInduced[iPad]/qCenterPad
642 // this variable is initialized at zero by the caller
643 // nPlace[iPad] - the number of the pad place, iPad = 0, 1, 2, 3
644 // this variable is initialized at zero by the caller
646 // Description of used variables:
647 // eff[iPad] - efficiency of the pad
648 // res[iPad] - resolution of the pad, ns
649 // timeWalk[iPad] - time walk of the pad, ns
650 // timeDelay[iPad] - time delay for neighbouring pad to hited pad, ns
651 // PadId[iPad] - Pad Identifier
652 // E | F --> PadId[iPad] = 5 | 6
653 // A | B --> PadId[iPad] = 1 | 2
654 // C | D --> PadId[iPad] = 3 | 4
655 // nTail[iPad] - the tail number, = 1 for tailA, = 2 for tailB
656 // qCenterPad - charge extimated for each pad, arb. units
657 // weightsSum - sum of weights extimated for each pad fired, arb. units
659 const Float_t kSigmaForTail[2] = {AliTOFGeometry::SigmaForTail1(),AliTOFGeometry::SigmaForTail2()}; //for tail
660 Int_t iz = 0, ix = 0;
661 Float_t dX = 0., dZ = 0., x = 0., z = 0.;
662 Float_t h = fHparameter, h2 = fH2parameter, k = fKparameter, k2 = fK2parameter;
663 Float_t effX = 0., effZ = 0., resX = 0., resZ = 0., timeWalkX = 0., timeWalkZ = 0.;
664 Float_t logOfqInd = 0.;
665 Float_t weightsSum = 0.;
666 Int_t nTail[4] = {0,0,0,0};
667 Int_t padId[4] = {0,0,0,0};
668 Float_t eff[4] = {0.,0.,0.,0.};
669 Float_t res[4] = {0.,0.,0.,0.};
670 // Float_t qCenterPad = fMinimumCharge * fMinimumCharge;
671 Float_t qCenterPad = 1.;
672 Float_t timeWalk[4] = {0.,0.,0.,0.};
673 Float_t timeDelay[4] = {0.,0.,0.,0.};
678 (z0 <= 0) ? iz = 0 : iz = 1;
679 dZ = z0 + (0.5 * AliTOFGeometry::NpadZ() - iz - 0.5) * AliTOFGeometry::ZPad(); // hit position in the pad frame, (0,0) - center of the pad
680 z = 0.5 * AliTOFGeometry::ZPad() - TMath::Abs(dZ); // variable for eff., res. and timeWalk. functions
681 iz++; // z row: 1, ..., AliTOFGeometry::NpadZ = 2
682 ix = (Int_t)((x0 + 0.5 * AliTOFGeometry::NpadX() * AliTOFGeometry::XPad()) / AliTOFGeometry::XPad());
683 dX = x0 + (0.5 * AliTOFGeometry::NpadX() - ix - 0.5) * AliTOFGeometry::XPad(); // hit position in the pad frame, (0,0) - center of the pad
684 x = 0.5 * AliTOFGeometry::XPad() - TMath::Abs(dX); // variable for eff., res. and timeWalk. functions;
685 ix++; // x row: 1, ..., AliTOFGeometry::NpadX = 48
689 nPlace[nActivatedPads-1] = (iz - 1) * AliTOFGeometry::NpadX() + ix;
690 qInduced[nActivatedPads-1] = qCenterPad;
691 padId[nActivatedPads-1] = 1;
693 if (fEdgeEffect == 0) {
694 eff[nActivatedPads-1] = fEffCenter;
695 if (gRandom->Rndm() < eff[nActivatedPads-1]) {
697 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + fResCenter * fResCenter); // ns
698 isFired[nActivatedPads-1] = kTRUE;
699 tofTime[nActivatedPads-1] = gRandom->Gaus(geantTime + fTimeWalkCenter, res[0]);
700 averageTime = tofTime[nActivatedPads-1];
706 effZ = fEffBoundary + (fEff2Boundary - fEffBoundary) * z / h2;
708 effZ = fEff2Boundary + (fEffCenter - fEff2Boundary) * (z - h2) / (h - h2);
710 resZ = fResBoundary + (fResCenter - fResBoundary) * z / h;
711 timeWalkZ = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * z / h;
712 nTail[nActivatedPads-1] = 1;
716 timeWalkZ = fTimeWalkCenter;
721 effX = fEffBoundary + (fEff2Boundary - fEffBoundary) * x / h2;
723 effX = fEff2Boundary + (fEffCenter - fEff2Boundary) * (x - h2) / (h - h2);
725 resX = fResBoundary + (fResCenter - fResBoundary) * x / h;
726 timeWalkX = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * x / h;
727 nTail[nActivatedPads-1] = 1;
731 timeWalkX = fTimeWalkCenter;
734 (effZ<effX) ? eff[nActivatedPads-1] = effZ : eff[nActivatedPads-1] = effX;
735 (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
736 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
741 effZ = fEffBoundary - (fEffBoundary - fEff3Boundary) * (z / k2);
743 effZ = fEff3Boundary * (k - z) / (k - k2);
745 resZ = fResBoundary + fResSlope * z / k;
746 timeWalkZ = fTimeWalkBoundary + fTimeWalkSlope * z / k;
749 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
751 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX();
752 eff[nActivatedPads-1] = effZ;
753 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resZ * resZ); // ns
754 timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ; // ns
755 nTail[nActivatedPads-1] = 2;
756 if (fTimeDelayFlag) {
757 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
758 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
759 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
760 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
761 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
763 timeDelay[nActivatedPads-1] = 0.;
765 padId[nActivatedPads-1] = 2;
770 ////// Pad C, D, E, F:
772 effX = fEffBoundary - (fEffBoundary - fEff3Boundary) * (x / k2);
774 effX = fEff3Boundary * (k - x) / (k - k2);
776 resX = fResBoundary + fResSlope*x/k;
777 timeWalkX = fTimeWalkBoundary + fTimeWalkSlope*x/k;
781 if(ix > 1 && dX < 0) {
783 nPlace[nActivatedPads-1] = nPlace[0] - 1;
784 eff[nActivatedPads-1] = effX;
785 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resX * resX); // ns
786 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
787 nTail[nActivatedPads-1] = 2;
788 if (fTimeDelayFlag) {
789 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
790 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
791 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
792 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
793 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
795 timeDelay[nActivatedPads-1] = 0.;
797 padId[nActivatedPads-1] = 3;
801 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
803 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX() - 1;
804 eff[nActivatedPads-1] = effX * effZ;
805 (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
806 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
808 nTail[nActivatedPads-1] = 2;
809 if (fTimeDelayFlag) {
810 if (TMath::Abs(x) < TMath::Abs(z)) {
811 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
812 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
813 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
814 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
816 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
817 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
818 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
819 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
821 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
823 timeDelay[nActivatedPads-1] = 0.;
825 padId[nActivatedPads-1] = 4;
831 if(ix < AliTOFGeometry::NpadX() && dX > 0) {
833 nPlace[nActivatedPads-1] = nPlace[0] + 1;
834 eff[nActivatedPads-1] = effX;
835 res[nActivatedPads-1] = 0.001 * (TMath::Sqrt(fAddTRes*fAddTRes + resX * resX)); // ns
836 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
837 nTail[nActivatedPads-1] = 2;
838 if (fTimeDelayFlag) {
839 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
840 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
841 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
842 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
843 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
845 timeDelay[nActivatedPads-1] = 0.;
847 padId[nActivatedPads-1] = 5;
852 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
854 nPlace[nActivatedPads - 1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX() + 1;
855 eff[nActivatedPads - 1] = effX * effZ;
856 (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
857 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001*timeWalkX; // ns
858 nTail[nActivatedPads-1] = 2;
859 if (fTimeDelayFlag) {
860 if (TMath::Abs(x) < TMath::Abs(z)) {
861 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
862 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
863 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
864 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
866 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
867 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
868 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
869 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
871 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
873 timeDelay[nActivatedPads-1] = 0.;
875 padId[nActivatedPads-1] = 6;
882 for (Int_t iPad = 0; iPad < nActivatedPads; iPad++) {
883 if (res[iPad] < fTimeResolution) res[iPad] = fTimeResolution;
884 if(gRandom->Rndm() < eff[iPad]) {
885 isFired[iPad] = kTRUE;
888 if(nTail[iPad] == 0) {
889 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
891 ftail->SetParameters(res[iPad], 2. * res[iPad], kSigmaForTail[nTail[iPad]-1]);
892 Double_t timeAB = ftail->GetRandom();
893 tofTime[iPad] = geantTime + timeWalk[iPad] + timeDelay[iPad] + timeAB;
896 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
898 if (fAverageTimeFlag) {
899 averageTime += tofTime[iPad] * qInduced[iPad];
900 weightsSum += qInduced[iPad];
902 averageTime += tofTime[iPad];
907 if (weightsSum!=0) averageTime /= weightsSum;
908 } // end else (fEdgeEffect != 0)
911 //__________________________________________________________________
912 void AliTOFSDigitizer::PrintParameters()const
915 // Print parameters used for sdigitization
917 AliInfo(Form(" ------------------- %s -------------", GetName()));
918 AliInfo(" Parameters used for TOF SDigitization ");
919 // Printing the parameters
921 AliInfo(Form(" Number of events: %i ", (fEvent2-fEvent1)));
922 AliInfo(Form(" from event %i to event %i", fEvent1, (fEvent2-1)));
923 AliInfo(Form(" Time Resolution (ns) %d Pad Efficiency: %d ", fTimeResolution, fpadefficiency));
924 AliInfo(Form(" Edge Effect option: %d", fEdgeEffect));
926 AliInfo(" Boundary Effect Simulation Parameters ");
927 AliInfo(Form(" Hparameter: %d H2parameter: %d Kparameter: %d K2parameter: %d", fHparameter, fH2parameter, fKparameter, fK2parameter));
928 AliInfo(Form(" Efficiency in the central region of the pad: %d", fEffCenter));
929 AliInfo(Form(" Efficiency at the boundary region of the pad: %d", fEffBoundary));
930 AliInfo(Form(" Efficiency value at H2parameter %d", fEff2Boundary));
931 AliInfo(Form(" Efficiency value at K2parameter %d", fEff3Boundary));
932 AliInfo(Form(" Resolution (ps) in the central region of the pad: %d", fResCenter));
933 AliInfo(Form(" Resolution (ps) at the boundary of the pad : %d", fResBoundary));
934 AliInfo(Form(" Slope (ps/K) for neighbouring pad : %d", fResSlope));
935 AliInfo(Form(" Time walk (ps) in the central region of the pad : %d", fTimeWalkCenter));
936 AliInfo(Form(" Time walk (ps) at the boundary of the pad : %d", fTimeWalkBoundary));
937 AliInfo(Form(" Slope (ps/K) for neighbouring pad : %d", fTimeWalkSlope));
938 AliInfo(" Pulse Heigth Simulation Parameters ");
939 AliInfo(Form(" Flag for delay due to the PulseHeightEffect : %d", fTimeDelayFlag));
940 AliInfo(Form(" Pulse Height Slope : %d", fPulseHeightSlope));
941 AliInfo(Form(" Time Delay Slope : %d", fTimeDelaySlope));
942 AliInfo(Form(" Minimum charge amount which could be induced : %d", fMinimumCharge));
943 AliInfo(Form(" Smearing in charge in (q1/q2) vs x plot : %d", fChargeSmearing));
944 AliInfo(Form(" Smearing in log of charge ratio : %d", fLogChargeSmearing));
945 AliInfo(Form(" Smearing in time in time vs log(q1/q2) plot : %d", fTimeSmearing));
946 AliInfo(Form(" Flag for average time : %d", fAverageTimeFlag));
947 AliInfo(Form(" Edge tails option : %d", fEdgeTails));