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"
46 #include "AliRunLoader.h"
48 #include "AliTOFGeometry.h"
49 #include "AliTOFHitMap.h"
50 #include "AliTOFSDigit.h"
51 #include "AliTOFSDigitizer.h"
52 #include "AliTOFhit.h"
53 #include "AliTOFhitT0.h"
56 ClassImp(AliTOFSDigitizer)
58 //____________________________________________________________________________
59 AliTOFSDigitizer::AliTOFSDigitizer():TTask("TOFSDigitizer","")
73 //____________________________________________________________________________
74 AliTOFSDigitizer::AliTOFSDigitizer(const char* HeaderFile, Int_t evNumber1, Int_t nEvents):TTask("TOFSDigitizer","")
77 fSelectedSector=-1; // by default we sdigitize all sectors
78 fSelectedPlate =-1; // by default we sdigitize all plates in all sectors
80 fHeadersFile = HeaderFile ; // input filename (with hits)
81 TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data());
83 //File was not opened yet open file and get alirun object
85 file = TFile::Open(fHeadersFile.Data(),"update") ;
86 gAlice = (AliRun *) file->Get("gAlice") ;
89 // add Task to //root/Tasks folder
90 TString evfoldname = AliConfig::GetDefaultEventFolderName();
91 fRunLoader = AliRunLoader::GetRunLoader(evfoldname);
93 fRunLoader = AliRunLoader::Open(HeaderFile);//open session and mount on default event folder
94 if (fRunLoader == 0x0)
96 AliFatal("Event is not loaded. Exiting");
100 if (fRunLoader->TreeE() == 0x0) 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 AliError(Form("fEvent2 = %d <= fEvent1 = %d", fEvent2, fEvent1));
113 AliError(Form("Correction: fEvent2 = %d <= fEvent1 = %d", fEvent2, fEvent1));
116 // init parameters for sdigitization
119 fTOFLoader = fRunLoader->GetLoader("TOFLoader");
120 if (fTOFLoader == 0x0)
122 AliFatal("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 = 0.080; //0.120; OLD
141 fpadefficiency = 0.99 ;
148 fEffCenter = fpadefficiency;
150 fEff2Boundary = 0.90;
151 fEff3Boundary = 0.08;
152 fAddTRes = 68. ; // \sqrt{2x20^2 + 15^2 + 2x10^2 + 30^2 + 50^2} (p-p)
153 //fAddTRes = 48. ; // \sqrt{2x20^2 + 15^2 + 2x10^2 + 30^2 + 15^2} (Pb-Pb)
154 // 30^2+20^2+40^2+50^2+50^2+50^2 = 10400 ps^2 (very old value)
155 fResCenter = 35. ; //50. ; // OLD
157 fResSlope = 37. ; //40. ; // OLD
158 fTimeWalkCenter = 0. ;
159 fTimeWalkBoundary=0. ;
160 fTimeWalkSlope = 0. ;
162 fPulseHeightSlope=2.0 ;
163 fTimeDelaySlope =0.060;
164 // was fMinimumCharge = TMath::Exp(fPulseHeightSlope*fKparameter/2.);
165 fMinimumCharge = TMath::Exp(-fPulseHeightSlope*fHparameter);
166 fChargeSmearing=0.0 ;
167 fLogChargeSmearing=0.13;
168 fTimeSmearing =0.022;
171 fAdcBin = 0.25; // 1 ADC bin = 0.25 pC (or 0.03 pC)
172 fAdcMean = 50.; // ADC distribution mpv value for Landau (in bins)
173 // it corresponds to a mean value of ~100 bins
174 fAdcRms = 25.; // ADC distribution rms value (in bins)
175 // it corresponds to distribution rms ~50 bins
178 //__________________________________________________________________
179 Double_t TimeWithTail(Double_t* x, Double_t* par)
181 // sigma - par[0], alpha - par[1], part - par[2]
182 // at x<part*sigma - gauss
183 // at x>part*sigma - TMath::Exp(-x/alpha)
186 if(xx<par[0]*par[2]) {
187 f = TMath::Exp(-xx*xx/(2*par[0]*par[0]));
189 f = TMath::Exp(-(xx-par[0]*par[2])/par[1]-0.5*par[2]*par[2]);
195 //____________________________________________________________________________
196 void AliTOFSDigitizer::Exec(Option_t *verboseOption) {
198 if (strstr(verboseOption,"tim") || strstr(verboseOption,"all"))
199 gBenchmark->Start("TOFSDigitizer");
201 if (fEdgeTails) ftail = new TF1("tail",TimeWithTail,-2,2,3);
203 Int_t nselectedHits=0;
204 Int_t ntotalsdigits=0;
205 Int_t ntotalupdates=0;
206 Int_t nnoisesdigits=0;
207 Int_t nsignalsdigits=0;
208 Int_t nHitsFromPrim=0;
209 Int_t nHitsFromSec=0;
210 Int_t nlargeTofDiff=0;
212 Bool_t thereIsNotASelection=(fSelectedSector==-1) && (fSelectedPlate==-1);
214 if (fRunLoader->GetAliRun() == 0x0) fRunLoader->LoadgAlice();
215 gAlice = fRunLoader->GetAliRun();
217 fRunLoader->LoadKinematics();
219 AliTOF *tof = (AliTOF *) gAlice->GetDetector("TOF");
222 AliError("TOF not found");
226 fTOFLoader->LoadHits("read");
227 fTOFLoader->LoadSDigits("recreate");
229 for (Int_t iEvent=fEvent1; iEvent<fEvent2; iEvent++) {
230 // cout << "------------------- "<< GetName() << " ------------- \n";
231 // cout << "Sdigitizing event " << iEvent << endl;
233 fRunLoader->GetEvent(iEvent);
235 TTree *hitTree = fTOFLoader->TreeH ();
236 if (!hitTree) return;
238 if (fTOFLoader->TreeS () == 0) fTOFLoader->MakeTree ("S");
240 //Make branch for digits
241 tof->MakeBranch("S");
243 // recreate TClonesArray fSDigits - for backward compatibility
244 if (tof->SDigits() == 0) {
245 tof->CreateSDigitsArray();
247 tof->RecreateSDigitsArray();
250 tof->SetTreeAddress();
252 Int_t version=tof->IsVersion();
254 Int_t nselectedHitsinEv=0;
255 Int_t ntotalsdigitsinEv=0;
256 Int_t ntotalupdatesinEv=0;
257 Int_t nnoisesdigitsinEv=0;
258 Int_t nsignalsdigitsinEv=0;
262 TClonesArray *tofHitArray = tof->Hits();
265 AliTOFHitMap *hitMap = new AliTOFHitMap(tof->SDigits());
267 TBranch * tofHitsBranch = hitTree->GetBranch("TOF");
269 Int_t ntracks = static_cast<Int_t>(hitTree->GetEntries());
270 for (Int_t track = 0; track < ntracks; track++)
273 tofHitsBranch->GetEvent(track);
274 particle = gAlice->GetMCApp()->Particle(track);
275 Int_t nhits = tofHitArray->GetEntriesFast();
276 // cleaning all hits of the same track in the same pad volume
277 // it is a rare event, however it happens
279 Int_t previousTrack =-1;
280 Int_t previousSector=-1;
281 Int_t previousPlate =-1;
282 Int_t previousStrip =-1;
283 Int_t previousPadX =-1;
284 Int_t previousPadZ =-1;
286 for (Int_t hit = 0; hit < nhits; hit++) {
287 Int_t vol[5]; // location for a digit
288 Float_t digit[2]; // TOF digit variables
294 // fp: really sorry for this, it is a temporary trick to have
297 AliTOFhit *tofHit = (AliTOFhit *) tofHitArray->UncheckedAt(hit);
298 tracknum = tofHit->GetTrack();
299 vol[0] = tofHit->GetSector();
300 vol[1] = tofHit->GetPlate();
301 vol[2] = tofHit->GetStrip();
302 vol[3] = tofHit->GetPadx();
303 vol[4] = tofHit->GetPadz();
304 dxPad = tofHit->GetDx();
305 dzPad = tofHit->GetDz();
306 geantTime = tofHit->GetTof(); // unit [s]
308 AliTOFhitT0 *tofHit = (AliTOFhitT0 *) tofHitArray->UncheckedAt(hit);
309 tracknum = tofHit->GetTrack();
310 vol[0] = tofHit->GetSector();
311 vol[1] = tofHit->GetPlate();
312 vol[2] = tofHit->GetStrip();
313 vol[3] = tofHit->GetPadx();
314 vol[4] = tofHit->GetPadz();
315 dxPad = tofHit->GetDx();
316 dzPad = tofHit->GetDz();
317 geantTime = tofHit->GetTof(); // unit [s]
320 geantTime *= 1.e+09; // conversion from [s] to [ns]
322 // selection case for sdigitizing only hits in a given plate of a given sector
323 if(thereIsNotASelection || (vol[0]==fSelectedSector && vol[1]==fSelectedPlate)){
325 Bool_t dummy=((tracknum==previousTrack) && (vol[0]==previousSector) && (vol[1]==previousPlate) && (vol[2]==previousStrip));
327 Bool_t isCloneOfThePrevious=dummy && ((vol[3]==previousPadX) && (vol[4]==previousPadZ));
329 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))));
331 if(!isCloneOfThePrevious && !isNeighOfThePrevious){
332 // update "previous" values
333 // in fact, we are yet in the future, so the present is past
334 previousTrack=tracknum;
335 previousSector=vol[0];
336 previousPlate=vol[1];
337 previousStrip=vol[2];
343 if (particle->GetFirstMother() < 0) nHitsFromPrim++; // counts hits due to primary particles
345 Float_t xStrip=AliTOFGeometry::XPad()*(vol[3]+0.5-0.5*AliTOFGeometry::NpadX())+dxPad;
346 Float_t zStrip=AliTOFGeometry::ZPad()*(vol[4]+0.5-0.5*AliTOFGeometry::NpadZ())+dzPad;
348 Int_t nActivatedPads = 0, nFiredPads = 0;
349 Bool_t isFired[4] = {kFALSE, kFALSE, kFALSE, kFALSE};
350 Float_t tofAfterSimul[4] = {0., 0., 0., 0.};
351 Float_t qInduced[4] = {0.,0.,0.,0.};
352 Int_t nPlace[4] = {0, 0, 0, 0};
353 Float_t averageTime = 0.;
354 SimulateDetectorResponse(zStrip,xStrip,geantTime,nActivatedPads,nFiredPads,isFired,nPlace,qInduced,tofAfterSimul,averageTime);
356 for(Int_t indexOfPad=0; indexOfPad<nActivatedPads; indexOfPad++) {
357 if(isFired[indexOfPad]){ // the pad has fired
358 Float_t timediff=geantTime-tofAfterSimul[indexOfPad];
360 if(timediff>=0.2) nlargeTofDiff++;
362 digit[0] = (Int_t) ((tofAfterSimul[indexOfPad]*1.e+03)/AliTOFGeometry::TdcBinWidth()); // TDC bin number (each bin -> 50. ps)
364 Float_t landauFactor = gRandom->Landau(fAdcMean, fAdcRms);
365 digit[1] = (Int_t) (qInduced[indexOfPad] * landauFactor); // ADC bins (each bin -> 0.25 (or 0.03) pC)
367 // recalculate the volume only for neighbouring pads
369 (nPlace[indexOfPad]<=AliTOFGeometry::NpadX()) ? vol[4] = 0 : vol[4] = 1;
370 (nPlace[indexOfPad]<=AliTOFGeometry::NpadX()) ? vol[3] = nPlace[indexOfPad] - 1 : vol[3] = nPlace[indexOfPad] - AliTOFGeometry::NpadX() - 1;
372 // check if two sdigit are on the same pad;
373 // in that case we sum the two or more sdigits
374 if (hitMap->TestHit(vol) != kEmpty) {
375 AliTOFSDigit *sdig = static_cast<AliTOFSDigit*>(hitMap->GetHit(vol));
376 Int_t tdctime = (Int_t) digit[0];
377 Int_t adccharge = (Int_t) digit[1];
378 sdig->Update(AliTOFGeometry::TdcBinWidth(),tdctime,adccharge,tracknum);
383 tof->AddSDigit(tracknum, vol, digit);
390 nsignalsdigitsinEv++;
395 } // if (hitMap->TestHit(vol) != kEmpty)
396 } // if(isFired[indexOfPad])
397 } // end loop on nActivatedPads
398 } // if(nFiredPads) i.e. if some pads has fired
399 } // close if(!isCloneOfThePrevious)
400 } // close the selection on sector and plate
401 } // end loop on hits for the current track
402 } // end loop on ntracks
406 fTOFLoader->TreeS()->Reset();
407 fTOFLoader->TreeS()->Fill();
408 fTOFLoader->WriteSDigits("OVERWRITE");
410 if (tof->SDigits()) tof->ResetSDigits();
412 if (strstr(verboseOption,"all")) {
413 AliInfo("----------------------------------------");
414 AliInfo(" <AliTOFSDigitizer> ");
415 AliInfo(Form("After sdigitizing %d hits in event %d", nselectedHitsinEv, iEvent));
416 //" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
417 AliInfo(Form("%d digits have been created", ntotalsdigitsinEv));
418 AliInfo(Form("(%d due to signals and %d due to border effect)", nsignalsdigitsinEv, nnoisesdigitsinEv));
419 AliInfo(Form("%d total updates of the hit map have been performed in current event", ntotalupdatesinEv));
420 AliInfo("----------------------------------------");
423 } //event loop on events
425 fTOFLoader->UnloadSDigits();
426 fTOFLoader->UnloadHits();
427 fRunLoader->UnloadKinematics();
428 //fRunLoader->UnloadgAlice();
436 nHitsFromSec=nselectedHits-nHitsFromPrim;
437 if(strstr(verboseOption,"all")){
438 AliInfo("----------------------------------------");
439 AliInfo("----------------------------------------");
440 AliInfo("-----------SDigitization Summary--------");
441 AliInfo(" <AliTOFSDigitizer> ");
442 AliInfo(Form("After sdigitizing %d hits", nselectedHits));
443 AliInfo(Form("in %d events", fEvent2-fEvent1));
444 //" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
445 AliInfo(Form("%d sdigits have been created", ntotalsdigits));
446 AliInfo(Form("(%d due to signals and "
447 "%d due to border effect)", nsignalsdigits, nnoisesdigits));
448 AliInfo(Form("%d total updates of the hit map have been performed", ntotalupdates));
449 AliInfo(Form("in %d cases the time of flight difference is greater than 200 ps", nlargeTofDiff));
453 if(strstr(verboseOption,"tim") || strstr(verboseOption,"all")){
454 gBenchmark->Stop("TOFSDigitizer");
455 AliInfo("AliTOFSDigitizer:");
456 AliInfo(Form(" took %f seconds in order to make sdigits "
457 "%f seconds per event", gBenchmark->GetCpuTime("TOFSDigitizer"), gBenchmark->GetCpuTime("TOFSDigitizer")/(fEvent2-fEvent1)));
458 AliInfo(" +++++++++++++++++++++++++++++++++++++++++++++++++++ ");
463 //__________________________________________________________________
464 void AliTOFSDigitizer::Print(Option_t* /*opt*/)const
466 cout << "------------------- "<< GetName() << " ------------- \n";
469 //__________________________________________________________________
470 void AliTOFSDigitizer::SelectSectorAndPlate(Int_t sector, Int_t plate)
472 Bool_t isaWrongSelection=(sector < 0) || (sector >= AliTOFGeometry::NSectors()) || (plate < 0) || (plate >= AliTOFGeometry::NPlates());
473 if(isaWrongSelection){
474 AliError("You have selected an invalid value for sector or plate ");
475 AliError(Form("The correct range for sector is [0,%d]", AliTOFGeometry::NSectors()-1));
476 AliError(Form("The correct range for plate is [0,%d]", AliTOFGeometry::NPlates()-1));
477 AliError("By default we continue sdigitizing all hits in all plates of all sectors");
479 fSelectedSector=sector;
480 fSelectedPlate =plate;
481 AliInfo(Form("SDigitizing only hits in plate %d of the sector %d", fSelectedPlate, fSelectedSector));
485 //__________________________________________________________________
486 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)
489 // Input: z0, x0 - hit position in the strip system (0,0 - center of the strip), cm
490 // geantTime - time generated by Geant, ns
491 // Output: nActivatedPads - the number of pads activated by the hit (1 || 2 || 4)
492 // nFiredPads - the number of pads fired (really activated) by the hit (nFiredPads <= nActivatedPads)
493 // qInduced[iPad]- charge induced on pad, arb. units
494 // this array is initialized at zero by the caller
495 // tofAfterSimul[iPad] - time calculated with edge effect algorithm, ns
496 // this array is initialized at zero by the caller
497 // 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.
498 // The weight is given by the qInduced[iPad]/qCenterPad
499 // this variable is initialized at zero by the caller
500 // nPlace[iPad] - the number of the pad place, iPad = 0, 1, 2, 3
501 // this variable is initialized at zero by the caller
503 // Description of used variables:
504 // eff[iPad] - efficiency of the pad
505 // res[iPad] - resolution of the pad, ns
506 // timeWalk[iPad] - time walk of the pad, ns
507 // timeDelay[iPad] - time delay for neighbouring pad to hited pad, ns
508 // PadId[iPad] - Pad Identifier
509 // E | F --> PadId[iPad] = 5 | 6
510 // A | B --> PadId[iPad] = 1 | 2
511 // C | D --> PadId[iPad] = 3 | 4
512 // nTail[iPad] - the tail number, = 1 for tailA, = 2 for tailB
513 // qCenterPad - charge extimated for each pad, arb. units
514 // weightsSum - sum of weights extimated for each pad fired, arb. units
516 const Float_t kSigmaForTail[2] = {AliTOFGeometry::SigmaForTail1(),AliTOFGeometry::SigmaForTail2()}; //for tail
517 Int_t iz = 0, ix = 0;
518 Float_t dX = 0., dZ = 0., x = 0., z = 0.;
519 Float_t h = fHparameter, h2 = fH2parameter, k = fKparameter, k2 = fK2parameter;
520 Float_t effX = 0., effZ = 0., resX = 0., resZ = 0., timeWalkX = 0., timeWalkZ = 0.;
521 Float_t logOfqInd = 0.;
522 Float_t weightsSum = 0.;
523 Int_t nTail[4] = {0,0,0,0};
524 Int_t padId[4] = {0,0,0,0};
525 Float_t eff[4] = {0.,0.,0.,0.};
526 Float_t res[4] = {0.,0.,0.,0.};
527 // Float_t qCenterPad = fMinimumCharge * fMinimumCharge;
528 Float_t qCenterPad = 1.;
529 Float_t timeWalk[4] = {0.,0.,0.,0.};
530 Float_t timeDelay[4] = {0.,0.,0.,0.};
535 (z0 <= 0) ? iz = 0 : iz = 1;
536 dZ = z0 + (0.5 * AliTOFGeometry::NpadZ() - iz - 0.5) * AliTOFGeometry::ZPad(); // hit position in the pad frame, (0,0) - center of the pad
537 z = 0.5 * AliTOFGeometry::ZPad() - TMath::Abs(dZ); // variable for eff., res. and timeWalk. functions
538 iz++; // z row: 1, ..., AliTOFGeometry::NpadZ = 2
539 ix = (Int_t)((x0 + 0.5 * AliTOFGeometry::NpadX() * AliTOFGeometry::XPad()) / AliTOFGeometry::XPad());
540 dX = x0 + (0.5 * AliTOFGeometry::NpadX() - ix - 0.5) * AliTOFGeometry::XPad(); // hit position in the pad frame, (0,0) - center of the pad
541 x = 0.5 * AliTOFGeometry::XPad() - TMath::Abs(dX); // variable for eff., res. and timeWalk. functions;
542 ix++; // x row: 1, ..., AliTOFGeometry::NpadX = 48
546 nPlace[nActivatedPads-1] = (iz - 1) * AliTOFGeometry::NpadX() + ix;
547 qInduced[nActivatedPads-1] = qCenterPad;
548 padId[nActivatedPads-1] = 1;
550 if (fEdgeEffect == 0) {
551 eff[nActivatedPads-1] = fEffCenter;
552 if (gRandom->Rndm() < eff[nActivatedPads-1]) {
554 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + fResCenter * fResCenter); // ns
555 isFired[nActivatedPads-1] = kTRUE;
556 tofTime[nActivatedPads-1] = gRandom->Gaus(geantTime + fTimeWalkCenter, res[0]);
557 averageTime = tofTime[nActivatedPads-1];
563 effZ = fEffBoundary + (fEff2Boundary - fEffBoundary) * z / h2;
565 effZ = fEff2Boundary + (fEffCenter - fEff2Boundary) * (z - h2) / (h - h2);
567 resZ = fResBoundary + (fResCenter - fResBoundary) * z / h;
568 timeWalkZ = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * z / h;
569 nTail[nActivatedPads-1] = 1;
573 timeWalkZ = fTimeWalkCenter;
578 effX = fEffBoundary + (fEff2Boundary - fEffBoundary) * x / h2;
580 effX = fEff2Boundary + (fEffCenter - fEff2Boundary) * (x - h2) / (h - h2);
582 resX = fResBoundary + (fResCenter - fResBoundary) * x / h;
583 timeWalkX = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * x / h;
584 nTail[nActivatedPads-1] = 1;
588 timeWalkX = fTimeWalkCenter;
591 (effZ<effX) ? eff[nActivatedPads-1] = effZ : eff[nActivatedPads-1] = effX;
592 (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
593 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
598 effZ = fEffBoundary - (fEffBoundary - fEff3Boundary) * (z / k2);
600 effZ = fEff3Boundary * (k - z) / (k - k2);
602 resZ = fResBoundary + fResSlope * z / k;
603 timeWalkZ = fTimeWalkBoundary + fTimeWalkSlope * z / k;
606 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
608 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX();
609 eff[nActivatedPads-1] = effZ;
610 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resZ * resZ); // ns
611 timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ; // ns
612 nTail[nActivatedPads-1] = 2;
613 if (fTimeDelayFlag) {
614 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
615 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
616 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
617 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
618 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
620 timeDelay[nActivatedPads-1] = 0.;
622 padId[nActivatedPads-1] = 2;
627 ////// Pad C, D, E, F:
629 effX = fEffBoundary - (fEffBoundary - fEff3Boundary) * (x / k2);
631 effX = fEff3Boundary * (k - x) / (k - k2);
633 resX = fResBoundary + fResSlope*x/k;
634 timeWalkX = fTimeWalkBoundary + fTimeWalkSlope*x/k;
638 if(ix > 1 && dX < 0) {
640 nPlace[nActivatedPads-1] = nPlace[0] - 1;
641 eff[nActivatedPads-1] = effX;
642 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resX * resX); // ns
643 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
644 nTail[nActivatedPads-1] = 2;
645 if (fTimeDelayFlag) {
646 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
647 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
648 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
649 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
650 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
652 timeDelay[nActivatedPads-1] = 0.;
654 padId[nActivatedPads-1] = 3;
658 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
660 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX() - 1;
661 eff[nActivatedPads-1] = effX * effZ;
662 (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
663 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
665 nTail[nActivatedPads-1] = 2;
666 if (fTimeDelayFlag) {
667 if (TMath::Abs(x) < TMath::Abs(z)) {
668 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
669 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
670 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
671 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
673 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
674 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
675 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
676 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
678 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
680 timeDelay[nActivatedPads-1] = 0.;
682 padId[nActivatedPads-1] = 4;
688 if(ix < AliTOFGeometry::NpadX() && dX > 0) {
690 nPlace[nActivatedPads-1] = nPlace[0] + 1;
691 eff[nActivatedPads-1] = effX;
692 res[nActivatedPads-1] = 0.001 * (TMath::Sqrt(fAddTRes*fAddTRes + resX * resX)); // ns
693 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
694 nTail[nActivatedPads-1] = 2;
695 if (fTimeDelayFlag) {
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);
700 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
702 timeDelay[nActivatedPads-1] = 0.;
704 padId[nActivatedPads-1] = 5;
709 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
711 nPlace[nActivatedPads - 1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX() + 1;
712 eff[nActivatedPads - 1] = effX * effZ;
713 (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
714 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001*timeWalkX; // ns
715 nTail[nActivatedPads-1] = 2;
716 if (fTimeDelayFlag) {
717 if (TMath::Abs(x) < TMath::Abs(z)) {
718 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
719 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
720 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
721 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
723 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
724 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
725 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
726 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
728 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
730 timeDelay[nActivatedPads-1] = 0.;
732 padId[nActivatedPads-1] = 6;
739 for (Int_t iPad = 0; iPad < nActivatedPads; iPad++) {
740 if (res[iPad] < fTimeResolution) res[iPad] = fTimeResolution;
741 if(gRandom->Rndm() < eff[iPad]) {
742 isFired[iPad] = kTRUE;
745 if(nTail[iPad] == 0) {
746 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
748 ftail->SetParameters(res[iPad], 2. * res[iPad], kSigmaForTail[nTail[iPad]-1]);
749 Double_t timeAB = ftail->GetRandom();
750 tofTime[iPad] = geantTime + timeWalk[iPad] + timeDelay[iPad] + timeAB;
753 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
755 if (fAverageTimeFlag) {
756 averageTime += tofTime[iPad] * qInduced[iPad];
757 weightsSum += qInduced[iPad];
759 averageTime += tofTime[iPad];
764 if (weightsSum!=0) averageTime /= weightsSum;
765 } // end else (fEdgeEffect != 0)
768 //__________________________________________________________________
769 void AliTOFSDigitizer::PrintParameters()const
772 // Print parameters used for sdigitization
774 cout << " ------------------- "<< GetName() << " -------------" << endl ;
775 cout << " Parameters used for TOF SDigitization " << endl ;
776 // Printing the parameters
778 cout << " Number of events: " << (fEvent2-fEvent1) << endl;
779 cout << " from event " << fEvent1 << " to event " << (fEvent2-1) << endl;
780 cout << " Time Resolution (ns) "<< fTimeResolution <<" Pad Efficiency: "<< fpadefficiency << endl;
781 cout << " Edge Effect option: "<< fEdgeEffect<< endl;
783 cout << " Boundary Effect Simulation Parameters " << endl;
784 cout << " Hparameter: "<< fHparameter<<" H2parameter:"<< fH2parameter <<" Kparameter:"<< fKparameter<<" K2parameter: "<< fK2parameter << endl;
785 cout << " Efficiency in the central region of the pad: "<< fEffCenter << endl;
786 cout << " Efficiency at the boundary region of the pad: "<< fEffBoundary << endl;
787 cout << " Efficiency value at H2parameter "<< fEff2Boundary << endl;
788 cout << " Efficiency value at K2parameter "<< fEff3Boundary << endl;
789 cout << " Resolution (ps) in the central region of the pad: "<< fResCenter << endl;
790 cout << " Resolution (ps) at the boundary of the pad : "<< fResBoundary << endl;
791 cout << " Slope (ps/K) for neighbouring pad : "<< fResSlope <<endl;
792 cout << " Time walk (ps) in the central region of the pad : "<< fTimeWalkCenter << endl;
793 cout << " Time walk (ps) at the boundary of the pad : "<< fTimeWalkBoundary<< endl;
794 cout << " Slope (ps/K) for neighbouring pad : "<< fTimeWalkSlope<<endl;
795 cout << " Pulse Heigth Simulation Parameters " << endl;
796 cout << " Flag for delay due to the PulseHeightEffect: "<< fTimeDelayFlag <<endl;
797 cout << " Pulse Height Slope : "<< fPulseHeightSlope<<endl;
798 cout << " Time Delay Slope : "<< fTimeDelaySlope<<endl;
799 cout << " Minimum charge amount which could be induced : "<< fMinimumCharge<<endl;
800 cout << " Smearing in charge in (q1/q2) vs x plot : "<< fChargeSmearing<<endl;
801 cout << " Smearing in log of charge ratio : "<< fLogChargeSmearing<<endl;
802 cout << " Smearing in time in time vs log(q1/q2) plot : "<< fTimeSmearing<<endl;
803 cout << " Flag for average time : "<< fAverageTimeFlag<<endl;
804 cout << " Edge tails option : "<< fEdgeTails << endl;