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1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
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 **************************************************************************/
15
16/* $Id$ */
17
18//__________________________________________________________//
19// //
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 //
24// //
25// -- Authors: F. Pierella, A. De Caro //
26// Use case: see AliTOFhits2sdigits.C macro in the CVS //
27//__________________________________________________________//
28
29#include <TBenchmark.h>
30#include <TClonesArray.h>
31#include <TF1.h>
32#include <TFile.h>
33#include <TParticle.h>
34#include <TTree.h>
35#include <TRandom.h>
36#include <TROOT.h>
37
38#include "AliLoader.h"
39#include "AliLog.h"
40#include "AliMC.h"
41#include "AliRunLoader.h"
42#include "AliRun.h"
43
44#include "AliTOFGeometry.h"
45#include "AliTOFHitMap.h"
46#include "AliTOFhitT0.h"
47#include "AliTOFhit.h"
48#include "AliTOFSDigitizer.h"
49#include "AliTOFSDigit.h"
50#include "AliTOF.h"
51
52extern TROOT *gROOT;
53
54ClassImp(AliTOFSDigitizer)
55
56//____________________________________________________________________________
57AliTOFSDigitizer::AliTOFSDigitizer():
58 TTask("TOFSDigitizer",""),
59 fEvent1(-1),
60 fEvent2(-1),
61 ftail(0x0),
62 fHeadersFile(""),
63 fRunLoader(0x0),
64 fTOFLoader(0x0),
65 fSelectedSector(-1),
66 fSelectedPlate(-1),
67 fTimeResolution(0),
68 fpadefficiency(0),
69 fEdgeEffect(-1),
70 fEdgeTails(-1),
71 fHparameter(0),
72 fH2parameter(0),
73 fKparameter(0),
74 fK2parameter(0),
75 fEffCenter(0),
76 fEffBoundary(0),
77 fEff2Boundary(0),
78 fEff3Boundary(0),
79 fAddTRes(0),
80 fResCenter(0),
81 fResBoundary(0),
82 fResSlope(0),
83 fTimeWalkCenter(0),
84 fTimeWalkBoundary(0),
85 fTimeWalkSlope(0),
86 fTimeDelayFlag(-1),
87 fPulseHeightSlope(0),
88 fTimeDelaySlope(0),
89 fMinimumCharge(0),
90 fChargeSmearing(0),
91 fLogChargeSmearing(0),
92 fTimeSmearing(0),
93 fAverageTimeFlag(-1),
94 fAdcBin(0),
95 fAdcMean(0),
96 fAdcRms(0)
97{
98 // ctor
99}
100
101//------------------------------------------------------------------------
102AliTOFSDigitizer::AliTOFSDigitizer(const AliTOFSDigitizer &source):
103 TTask(source),
104 fEvent1(-1),
105 fEvent2(-1),
106 ftail(0x0),
107 fHeadersFile(""),
108 fRunLoader(0x0),
109 fTOFLoader(0x0),
110 fSelectedSector(-1),
111 fSelectedPlate(-1),
112 fTimeResolution(0),
113 fpadefficiency(0),
114 fEdgeEffect(-1),
115 fEdgeTails(-1),
116 fHparameter(0),
117 fH2parameter(0),
118 fKparameter(0),
119 fK2parameter(0),
120 fEffCenter(0),
121 fEffBoundary(0),
122 fEff2Boundary(0),
123 fEff3Boundary(0),
124 fAddTRes(0),
125 fResCenter(0),
126 fResBoundary(0),
127 fResSlope(0),
128 fTimeWalkCenter(0),
129 fTimeWalkBoundary(0),
130 fTimeWalkSlope(0),
131 fTimeDelayFlag(-1),
132 fPulseHeightSlope(0),
133 fTimeDelaySlope(0),
134 fMinimumCharge(0),
135 fChargeSmearing(0),
136 fLogChargeSmearing(0),
137 fTimeSmearing(0),
138 fAverageTimeFlag(-1),
139 fAdcBin(0),
140 fAdcMean(0),
141 fAdcRms(0)
142{
143 // copy constructor
144 //this->fTOFGeometry=source.fTOFGeometry;
145
146}
147
148//____________________________________________________________________________
149AliTOFSDigitizer& AliTOFSDigitizer::operator=(const AliTOFSDigitizer &/*source*/)
150{
151 // ass. op.
152 return *this;
153
154}
155
156//____________________________________________________________________________
157AliTOFSDigitizer::AliTOFSDigitizer(const char* HeaderFile, Int_t evNumber1, Int_t nEvents):
158 TTask("TOFSDigitizer",""),
159 fEvent1(-1),
160 fEvent2(-1),
161 ftail(0x0),
162 fHeadersFile(HeaderFile), // input filename (with hits)
163 fRunLoader(0x0),
164 fTOFLoader(0x0),
165 fSelectedSector(-1), // by default we sdigitize all sectors
166 fSelectedPlate(-1), // by default we sdigitize all plates in all sectors
167 fTimeResolution(0),
168 fpadefficiency(0),
169 fEdgeEffect(-1),
170 fEdgeTails(-1),
171 fHparameter(0),
172 fH2parameter(0),
173 fKparameter(0),
174 fK2parameter(0),
175 fEffCenter(0),
176 fEffBoundary(0),
177 fEff2Boundary(0),
178 fEff3Boundary(0),
179 fAddTRes(0),
180 fResCenter(0),
181 fResBoundary(0),
182 fResSlope(0),
183 fTimeWalkCenter(0),
184 fTimeWalkBoundary(0),
185 fTimeWalkSlope(0),
186 fTimeDelayFlag(-1),
187 fPulseHeightSlope(0),
188 fTimeDelaySlope(0),
189 fMinimumCharge(0),
190 fChargeSmearing(0),
191 fLogChargeSmearing(0),
192 fTimeSmearing(0),
193 fAverageTimeFlag(-1),
194 fAdcBin(0),
195 fAdcMean(0),
196 fAdcRms(0)
197{
198 //ctor, reading from input file
199
200 TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data());
201
202 //File was not opened yet open file and get alirun object
203 if (file == 0) {
204 file = TFile::Open(fHeadersFile.Data(),"update") ;
205 gAlice = (AliRun *) file->Get("gAlice") ;
206 }
207
208 // add Task to //root/Tasks folder
209 TString evfoldname = AliConfig::GetDefaultEventFolderName();
210 fRunLoader = AliRunLoader::GetRunLoader(evfoldname);
211 if (!fRunLoader)
212 fRunLoader = AliRunLoader::Open(HeaderFile);//open session and mount on default event folder
213 if (fRunLoader == 0x0)
214 {
215 AliFatal("Event is not loaded. Exiting");
216 return;
217 }
218
219 /*
220 fRunLoader->CdGAFile();
221 TDirectory *savedir=gDirectory;
222 TFile *in=(TFile*)gFile;
223
224
225// when fTOFGeometry was needed
226 if (!in->IsOpen()) {
227 AliWarning("Geometry file is not open default TOF geometry will be used");
228 fTOFGeometry = new AliTOFGeometry();
229 }
230 else {
231 in->cd();
232 fTOFGeometry = (AliTOFGeometry*)in->Get("TOFgeometry");
233 }
234
235 savedir->cd();
236 */
237 if (fRunLoader->TreeE() == 0x0) fRunLoader->LoadHeader();
238
239 if (evNumber1>=0) fEvent1 = evNumber1;
240 else fEvent1=0;
241
242 if (nEvents==0) fEvent2 = (Int_t)(fRunLoader->GetNumberOfEvents());
243 else if (nEvents>0) fEvent2 = evNumber1+nEvents;
244 else fEvent2 = 1;
245
246 if (!(fEvent2>fEvent1)) {
247 AliError(Form("fEvent2 = %d <= fEvent1 = %d", fEvent2, fEvent1));
248 fEvent1 = 0;
249 fEvent2 = 1;
250 AliError(Form("Correction: fEvent2 = %d <= fEvent1 = %d", fEvent2, fEvent1));
251 }
252
253 // init parameters for sdigitization
254 InitParameters();
255
256 fTOFLoader = fRunLoader->GetLoader("TOFLoader");
257 if (fTOFLoader == 0x0)
258 {
259 AliFatal("Can not find TOF loader in event. Exiting.");
260 return;
261 }
262 fTOFLoader->PostSDigitizer(this);
263}
264
265//____________________________________________________________________________
266AliTOFSDigitizer::~AliTOFSDigitizer()
267{
268 // dtor
269 fTOFLoader->CleanSDigitizer();
270
271}
272
273//____________________________________________________________________________
274void AliTOFSDigitizer::InitParameters()
275{
276 // set parameters for detector simulation
277
278 fTimeResolution = 0.080; //0.120; OLD
279 fpadefficiency = 0.99 ;
280 fEdgeEffect = 2 ;
281 fEdgeTails = 0 ;
282 fHparameter = 0.4 ;
283 fH2parameter = 0.15;
284 fKparameter = 0.5 ;
285 fK2parameter = 0.35;
286 fEffCenter = fpadefficiency;
287 fEffBoundary = 0.65;
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
294 fResBoundary = 70. ;
295 fResSlope = 37. ; //40. ; // OLD
296 fTimeWalkCenter = 0. ;
297 fTimeWalkBoundary=0. ;
298 fTimeWalkSlope = 0. ;
299 fTimeDelayFlag = 1 ;
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;
307 fAverageTimeFlag=0 ;
308
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
314}
315
316//__________________________________________________________________
317Double_t TimeWithTail(const Double_t * const x, const Double_t * const par)
318{
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)
322 Float_t xx =x[0];
323 Double_t f;
324 if(xx<par[0]*par[2]) {
325 f = TMath::Exp(-xx*xx/(2*par[0]*par[0]));
326 } else {
327 f = TMath::Exp(-(xx-par[0]*par[2])/par[1]-0.5*par[2]*par[2]);
328 }
329 return f;
330}
331
332//____________________________________________________________________________
333void AliTOFSDigitizer::Exec(Option_t *verboseOption) {
334 //execute TOF sdigitization
335 if (strstr(verboseOption,"tim") || strstr(verboseOption,"all"))
336 gBenchmark->Start("TOFSDigitizer");
337
338 if (fEdgeTails) ftail = new TF1("tail",TimeWithTail,-2,2,3);
339
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;
348
349 Bool_t thereIsNotASelection=(fSelectedSector==-1) && (fSelectedPlate==-1);
350
351 if (fRunLoader->GetAliRun() == 0x0) fRunLoader->LoadgAlice();
352 gAlice = fRunLoader->GetAliRun();
353
354 fRunLoader->LoadKinematics();
355
356 AliTOF *tof = (AliTOF *) gAlice->GetDetector("TOF");
357
358 if (!tof) {
359 AliError("TOF not found");
360 return;
361 }
362
363 fTOFLoader->LoadHits("read");
364 fTOFLoader->LoadSDigits("recreate");
365
366 Int_t vol[5]={-1,-1,-1,-1,-1}; // location for a digit
367 Int_t digit[2]={0,0}; // TOF digit variables
368
369 Int_t nselectedHitsinEv=0;
370 Int_t ntotalsdigitsinEv=0;
371 Int_t ntotalupdatesinEv=0;
372 Int_t nnoisesdigitsinEv=0;
373 Int_t nsignalsdigitsinEv=0;
374
375 for (Int_t iEvent=fEvent1; iEvent<fEvent2; iEvent++) {
376 //AliInfo(Form("------------------- %s -------------", GetName()));
377 //AliInfo(Form("Sdigitizing event %i", iEvent));
378
379 fRunLoader->GetEvent(iEvent);
380
381 TTree *hitTree = fTOFLoader->TreeH();
382 if (!hitTree) return;
383
384 if (fTOFLoader->TreeS () == 0) fTOFLoader->MakeTree ("S");
385
386 //Make branch for digits
387 tof->MakeBranch("S");
388
389 // recreate TClonesArray fSDigits - for backward compatibility
390 if (tof->SDigits() == 0) {
391 tof->CreateSDigitsArray();
392 } else {
393 tof->RecreateSDigitsArray();
394 }
395
396 tof->SetTreeAddress();
397
398 Int_t version=tof->IsVersion();
399
400 nselectedHitsinEv=0;
401 ntotalsdigitsinEv=0;
402 ntotalupdatesinEv=0;
403 nnoisesdigitsinEv=0;
404 nsignalsdigitsinEv=0;
405
406 TParticle *particle;
407 //AliTOFhit *tofHit;
408 TClonesArray *tofHitArray = tof->Hits();
409
410 // create hit map
411 //AliTOFHitMap *hitMap = new AliTOFHitMap(tof->SDigits(), fTOFGeometry);
412 AliTOFHitMap *hitMap = new AliTOFHitMap(tof->SDigits());
413
414 TBranch * tofHitsBranch = hitTree->GetBranch("TOF");
415
416 Int_t ntracks = static_cast<Int_t>(hitTree->GetEntries());
417 for (Int_t track = 0; track < ntracks; track++)
418 {
419 gAlice->GetMCApp()->ResetHits();
420 tofHitsBranch->GetEvent(track);
421
422 AliMC *mcApplication = (AliMC*)gAlice->GetMCApp();
423
424 particle = (TParticle*)mcApplication->Particle(track);
425 Int_t nhits = tofHitArray->GetEntriesFast();
426 // cleaning all hits of the same track in the same pad volume
427 // it is a rare event, however it happens
428
429 Int_t previousTrack =-1;
430 Int_t previousSector=-1;
431 Int_t previousPlate =-1;
432 Int_t previousStrip =-1;
433 Int_t previousPadX =-1;
434 Int_t previousPadZ =-1;
435
436 for (Int_t hit = 0; hit < nhits; hit++) {
437 for (Int_t aa=0; aa<5;aa++) vol[aa]=-1; // location for a digit
438 for (Int_t aa=0; aa<2;aa++) digit[aa]=0; // TOF digit variables
439 Int_t tracknum;
440 Float_t dxPad;
441 Float_t dzPad;
442 Float_t geantTime;
443
444 // fp: really sorry for this, it is a temporary trick to have
445 // track length too
446 if (version<6) { //(version!=6 && version!=7)
447 AliTOFhit *tofHit = (AliTOFhit *) tofHitArray->UncheckedAt(hit);
448 tracknum = tofHit->GetTrack();
449 vol[0] = tofHit->GetSector();
450 vol[1] = tofHit->GetPlate();
451 vol[2] = tofHit->GetStrip();
452 vol[3] = tofHit->GetPadx();
453 vol[4] = tofHit->GetPadz();
454 dxPad = tofHit->GetDx();
455 dzPad = tofHit->GetDz();
456 geantTime = tofHit->GetTof(); // unit [s]
457 } else {
458 AliTOFhitT0 *tofHit = (AliTOFhitT0 *) tofHitArray->UncheckedAt(hit);
459 tracknum = tofHit->GetTrack();
460 vol[0] = tofHit->GetSector();
461 vol[1] = tofHit->GetPlate();
462 vol[2] = tofHit->GetStrip();
463 vol[3] = tofHit->GetPadx();
464 vol[4] = tofHit->GetPadz();
465 dxPad = tofHit->GetDx();
466 dzPad = tofHit->GetDz();
467 geantTime = tofHit->GetTof(); // unit [s]
468 }
469
470 geantTime *= 1.e+09; // conversion from [s] to [ns]
471 // TOF matching window (~200ns) control
472 if (geantTime>=AliTOFGeometry::MatchingWindow()*1E-3) {
473 AliDebug(2,Form("Time measurement (%f) greater than the matching window (%f)",
474 geantTime, AliTOFGeometry::MatchingWindow()*1E-3));
475 continue;
476 }
477
478 // selection case for sdigitizing only hits in a given plate of a given sector
479 if(thereIsNotASelection || (vol[0]==fSelectedSector && vol[1]==fSelectedPlate)){
480
481 Bool_t dummy=((tracknum==previousTrack) && (vol[0]==previousSector) && (vol[1]==previousPlate) && (vol[2]==previousStrip));
482
483 Bool_t isCloneOfThePrevious=dummy && ((vol[3]==previousPadX) && (vol[4]==previousPadZ));
484
485 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))));
486
487 if(!isCloneOfThePrevious && !isNeighOfThePrevious){
488 // update "previous" values
489 // in fact, we are yet in the future, so the present is past
490 previousTrack=tracknum;
491 previousSector=vol[0];
492 previousPlate=vol[1];
493 previousStrip=vol[2];
494 previousPadX=vol[3];
495 previousPadZ=vol[4];
496
497 nselectedHits++;
498 nselectedHitsinEv++;
499 if (particle->GetFirstMother() < 0) nHitsFromPrim++; // counts hits due to primary particles
500
501 Float_t xStrip=AliTOFGeometry::XPad()*(vol[3]+0.5-0.5*AliTOFGeometry::NpadX())+dxPad;
502 Float_t zStrip=AliTOFGeometry::ZPad()*(vol[4]+0.5-0.5*AliTOFGeometry::NpadZ())+dzPad;
503
504 Int_t nActivatedPads = 0, nFiredPads = 0;
505 Bool_t isFired[4] = {kFALSE, kFALSE, kFALSE, kFALSE};
506 Float_t tofAfterSimul[4] = {0., 0., 0., 0.};
507 Float_t qInduced[4] = {0.,0.,0.,0.};
508 Int_t nPlace[4] = {0, 0, 0, 0};
509 Float_t averageTime = 0.;
510 SimulateDetectorResponse(zStrip,xStrip,geantTime,nActivatedPads,nFiredPads,isFired,nPlace,qInduced,tofAfterSimul,averageTime);
511 if(nFiredPads) {
512 for(Int_t indexOfPad=0; indexOfPad<nActivatedPads; indexOfPad++) {
513 if(isFired[indexOfPad]){ // the pad has fired
514 Float_t timediff=geantTime-tofAfterSimul[indexOfPad];
515
516 // TOF matching window (~200ns) control
517 if (tofAfterSimul[indexOfPad]>=AliTOFGeometry::MatchingWindow()*1E-3) {
518 AliDebug(2,Form("Time measurement (%f) greater than the matching window (%f)",
519 tofAfterSimul[indexOfPad], AliTOFGeometry::MatchingWindow()*1E-3));
520 continue;
521 }
522
523 if(timediff>=0.2) nlargeTofDiff++; // greater than 200ps
524
525 digit[0] = (Int_t) ((tofAfterSimul[indexOfPad]*1.e+03)/AliTOFGeometry::TdcBinWidth()); // TDC bin number (each bin -> 24.4 ps)
526
527 Float_t landauFactor = gRandom->Landau(fAdcMean, fAdcRms);
528 digit[1] = (Int_t) (qInduced[indexOfPad] * landauFactor); // ADC bins (each bin -> 0.25 (or 0.03) pC)
529
530 // recalculate the volume only for neighbouring pads
531 if(indexOfPad){
532 (nPlace[indexOfPad]<=AliTOFGeometry::NpadX()) ? vol[4] = 0 : vol[4] = 1;
533 (nPlace[indexOfPad]<=AliTOFGeometry::NpadX()) ? vol[3] = nPlace[indexOfPad] - 1 : vol[3] = nPlace[indexOfPad] - AliTOFGeometry::NpadX() - 1;
534 }
535 // check if two sdigit are on the same pad;
536 // in that case we sum the two or more sdigits
537 if (hitMap->TestHit(vol) != kEmpty) {
538 AliTOFSDigit *sdig = static_cast<AliTOFSDigit*>(hitMap->GetHit(vol));
539 Int_t tdctime = (Int_t) digit[0];
540 Int_t adccharge = (Int_t) digit[1];
541 sdig->Update(AliTOFGeometry::TdcBinWidth(),tdctime,adccharge,tracknum);
542 ntotalupdatesinEv++;
543 ntotalupdates++;
544 } else {
545
546 tof->AddSDigit(tracknum, vol, digit);
547
548 if(indexOfPad){
549 nnoisesdigits++;
550 nnoisesdigitsinEv++;
551 } else {
552 nsignalsdigits++;
553 nsignalsdigitsinEv++;
554 }
555 ntotalsdigitsinEv++;
556 ntotalsdigits++;
557 hitMap->SetHit(vol);
558 } // if (hitMap->TestHit(vol) != kEmpty)
559 } // if(isFired[indexOfPad])
560 } // end loop on nActivatedPads
561 } // if(nFiredPads) i.e. if some pads has fired
562 } // close if(!isCloneOfThePrevious)
563 } // close the selection on sector and plate
564 } // end loop on hits for the current track
565 } // end loop on ntracks
566
567 delete hitMap;
568
569 fTOFLoader->TreeS()->Reset();
570 fTOFLoader->TreeS()->Fill();
571 fTOFLoader->WriteSDigits("OVERWRITE");
572
573 if (tof->SDigits()) tof->ResetSDigits();
574
575 if (strstr(verboseOption,"all") || strstr(verboseOption,"partial")) {
576 AliDebug(2,"----------------------------------------");
577 AliDebug(2,Form("After sdigitizing %d hits in event %d", nselectedHitsinEv, iEvent));
578 //" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
579 AliDebug(1,Form("%d sdigits have been created", ntotalsdigitsinEv));
580 AliDebug(2,Form("(%d due to signals and %d due to border effect)", nsignalsdigitsinEv, nnoisesdigitsinEv));
581 AliDebug(2,Form("%d total updates of the hit map have been performed in current event", ntotalupdatesinEv));
582 AliDebug(2,"----------------------------------------");
583 }
584
585 } //event loop on events
586
587 fTOFLoader->UnloadSDigits();
588 fTOFLoader->UnloadHits();
589 fRunLoader->UnloadKinematics();
590 //fRunLoader->UnloadgAlice();
591
592 // free used memory
593 if (ftail){
594 delete ftail;
595 ftail = 0;
596 }
597
598 nHitsFromSec=nselectedHits-nHitsFromPrim;
599 if (strstr(verboseOption,"all") || strstr(verboseOption,"partial")) {
600 AliDebug(2,"----------------------------------------");
601 AliDebug(2,Form("After sdigitizing %d hits in %d events ", nselectedHits, fEvent2-fEvent1));
602 //" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
603 AliDebug(2,Form("%d sdigits have been created", ntotalsdigits));
604 AliDebug(2,Form("(%d due to signals and %d due to border effect)", nsignalsdigits, nnoisesdigits));
605 AliDebug(2,Form("%d total updates of the hit map have been performed", ntotalupdates));
606 AliDebug(2,Form("in %d cases the time of flight difference is greater than 200 ps", nlargeTofDiff));
607 AliDebug(2,"----------------------------------------");
608 }
609
610
611 if(strstr(verboseOption,"tim") || strstr(verboseOption,"all")){
612 gBenchmark->Stop("TOFSDigitizer");
613 AliInfo("AliTOFSDigitizer:");
614 AliInfo(Form(" took %f seconds in order to make sdigits "
615 "%f seconds per event", gBenchmark->GetCpuTime("TOFSDigitizer"), gBenchmark->GetCpuTime("TOFSDigitizer")/(fEvent2-fEvent1)));
616 AliInfo(" +++++++++++++++++++++++++++++++++++++++++++++++++++ ");
617 }
618
619}
620
621//__________________________________________________________________
622void AliTOFSDigitizer::Print(Option_t* /*opt*/)const
623{
624 AliInfo(Form(" ------------------- %s ------------- ", GetName()));
625}
626
627//__________________________________________________________________
628void AliTOFSDigitizer::SelectSectorAndPlate(Int_t sector, Int_t plate)
629{
630 //Select sector and plate
631 Bool_t isaWrongSelection=(sector < 0) || (sector >= AliTOFGeometry::NSectors()) || (plate < 0) || (plate >= AliTOFGeometry::NPlates());
632 if(isaWrongSelection){
633 AliError("You have selected an invalid value for sector or plate ");
634 AliError(Form("The correct range for sector is [0,%d]", AliTOFGeometry::NSectors()-1));
635 AliError(Form("The correct range for plate is [0,%d]", AliTOFGeometry::NPlates()-1));
636 AliError("By default we continue sdigitizing all hits in all plates of all sectors");
637 } else {
638 fSelectedSector=sector;
639 fSelectedPlate =plate;
640 AliInfo(Form("SDigitizing only hits in plate %d of the sector %d", fSelectedPlate, fSelectedSector));
641 }
642}
643
644//__________________________________________________________________
645void 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)
646{
647 // Description:
648 // Input: z0, x0 - hit position in the strip system (0,0 - center of the strip), cm
649 // geantTime - time generated by Geant, ns
650 // Output: nActivatedPads - the number of pads activated by the hit (1 || 2 || 4)
651 // nFiredPads - the number of pads fired (really activated) by the hit (nFiredPads <= nActivatedPads)
652 // qInduced[iPad]- charge induced on pad, arb. units
653 // this array is initialized at zero by the caller
654 // tofAfterSimul[iPad] - time calculated with edge effect algorithm, ns
655 // this array is initialized at zero by the caller
656 // 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.
657 // The weight is given by the qInduced[iPad]/qCenterPad
658 // this variable is initialized at zero by the caller
659 // nPlace[iPad] - the number of the pad place, iPad = 0, 1, 2, 3
660 // this variable is initialized at zero by the caller
661 //
662 // Description of used variables:
663 // eff[iPad] - efficiency of the pad
664 // res[iPad] - resolution of the pad, ns
665 // timeWalk[iPad] - time walk of the pad, ns
666 // timeDelay[iPad] - time delay for neighbouring pad to hited pad, ns
667 // PadId[iPad] - Pad Identifier
668 // E | F --> PadId[iPad] = 5 | 6
669 // A | B --> PadId[iPad] = 1 | 2
670 // C | D --> PadId[iPad] = 3 | 4
671 // nTail[iPad] - the tail number, = 1 for tailA, = 2 for tailB
672 // qCenterPad - charge extimated for each pad, arb. units
673 // weightsSum - sum of weights extimated for each pad fired, arb. units
674
675 const Float_t kSigmaForTail[2] = {AliTOFGeometry::SigmaForTail1(),AliTOFGeometry::SigmaForTail2()}; //for tail
676 Int_t iz = 0, ix = 0;
677 Float_t dX = 0., dZ = 0., x = 0., z = 0.;
678 Float_t h = fHparameter, h2 = fH2parameter, k = fKparameter, k2 = fK2parameter;
679 Float_t effX = 0., effZ = 0., resX = 0., resZ = 0., timeWalkX = 0., timeWalkZ = 0.;
680 Float_t logOfqInd = 0.;
681 Float_t weightsSum = 0.;
682 Int_t nTail[4] = {0,0,0,0};
683 Int_t padId[4] = {0,0,0,0};
684 Float_t eff[4] = {0.,0.,0.,0.};
685 Float_t res[4] = {0.,0.,0.,0.};
686 // Float_t qCenterPad = fMinimumCharge * fMinimumCharge;
687 Float_t qCenterPad = 1.;
688 Float_t timeWalk[4] = {0.,0.,0.,0.};
689 Float_t timeDelay[4] = {0.,0.,0.,0.};
690
691 nActivatedPads = 0;
692 nFiredPads = 0;
693
694 (z0 <= 0) ? iz = 0 : iz = 1;
695 dZ = z0 + (0.5 * AliTOFGeometry::NpadZ() - iz - 0.5) * AliTOFGeometry::ZPad(); // hit position in the pad frame, (0,0) - center of the pad
696 z = 0.5 * AliTOFGeometry::ZPad() - TMath::Abs(dZ); // variable for eff., res. and timeWalk. functions
697 iz++; // z row: 1, ..., AliTOFGeometry::NpadZ = 2
698 ix = (Int_t)((x0 + 0.5 * AliTOFGeometry::NpadX() * AliTOFGeometry::XPad()) / AliTOFGeometry::XPad());
699 dX = x0 + (0.5 * AliTOFGeometry::NpadX() - ix - 0.5) * AliTOFGeometry::XPad(); // hit position in the pad frame, (0,0) - center of the pad
700 x = 0.5 * AliTOFGeometry::XPad() - TMath::Abs(dX); // variable for eff., res. and timeWalk. functions;
701 ix++; // x row: 1, ..., AliTOFGeometry::NpadX = 48
702
703 ////// Pad A:
704 nActivatedPads++;
705 nPlace[nActivatedPads-1] = (iz - 1) * AliTOFGeometry::NpadX() + ix;
706 qInduced[nActivatedPads-1] = qCenterPad;
707 padId[nActivatedPads-1] = 1;
708
709 if (fEdgeEffect == 0) {
710 eff[nActivatedPads-1] = fEffCenter;
711 if (gRandom->Rndm() < eff[nActivatedPads-1]) {
712 nFiredPads = 1;
713 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + fResCenter * fResCenter); // ns
714 isFired[nActivatedPads-1] = kTRUE;
715 tofTime[nActivatedPads-1] = gRandom->Gaus(geantTime + fTimeWalkCenter, res[0]);
716 averageTime = tofTime[nActivatedPads-1];
717 }
718 } else {
719
720 if(z < h) {
721 if(z < h2) {
722 effZ = fEffBoundary + (fEff2Boundary - fEffBoundary) * z / h2;
723 } else {
724 effZ = fEff2Boundary + (fEffCenter - fEff2Boundary) * (z - h2) / (h - h2);
725 }
726 resZ = fResBoundary + (fResCenter - fResBoundary) * z / h;
727 timeWalkZ = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * z / h;
728 nTail[nActivatedPads-1] = 1;
729 } else {
730 effZ = fEffCenter;
731 resZ = fResCenter;
732 timeWalkZ = fTimeWalkCenter;
733 }
734
735 if(x < h) {
736 if(x < h2) {
737 effX = fEffBoundary + (fEff2Boundary - fEffBoundary) * x / h2;
738 } else {
739 effX = fEff2Boundary + (fEffCenter - fEff2Boundary) * (x - h2) / (h - h2);
740 }
741 resX = fResBoundary + (fResCenter - fResBoundary) * x / h;
742 timeWalkX = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * x / h;
743 nTail[nActivatedPads-1] = 1;
744 } else {
745 effX = fEffCenter;
746 resX = fResCenter;
747 timeWalkX = fTimeWalkCenter;
748 }
749
750 (effZ<effX) ? eff[nActivatedPads-1] = effZ : eff[nActivatedPads-1] = effX;
751 (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
752 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
753
754
755 ////// Pad B:
756 if(z < k2) {
757 effZ = fEffBoundary - (fEffBoundary - fEff3Boundary) * (z / k2);
758 } else {
759 effZ = fEff3Boundary * (k - z) / (k - k2);
760 }
761 resZ = fResBoundary + fResSlope * z / k;
762 timeWalkZ = fTimeWalkBoundary + fTimeWalkSlope * z / k;
763
764 if(z < k && z > 0) {
765 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
766 nActivatedPads++;
767 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX();
768 eff[nActivatedPads-1] = effZ;
769 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resZ * resZ); // ns
770 timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ; // ns
771 nTail[nActivatedPads-1] = 2;
772 if (fTimeDelayFlag) {
773 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
774 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
775 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
776 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
777 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
778 } else {
779 timeDelay[nActivatedPads-1] = 0.;
780 }
781 padId[nActivatedPads-1] = 2;
782 }
783 }
784
785
786 ////// Pad C, D, E, F:
787 if(x < k2) {
788 effX = fEffBoundary - (fEffBoundary - fEff3Boundary) * (x / k2);
789 } else {
790 effX = fEff3Boundary * (k - x) / (k - k2);
791 }
792 resX = fResBoundary + fResSlope*x/k;
793 timeWalkX = fTimeWalkBoundary + fTimeWalkSlope*x/k;
794
795 if(x < k && x > 0) {
796 // C:
797 if(ix > 1 && dX < 0) {
798 nActivatedPads++;
799 nPlace[nActivatedPads-1] = nPlace[0] - 1;
800 eff[nActivatedPads-1] = effX;
801 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(fAddTRes*fAddTRes + resX * resX); // ns
802 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
803 nTail[nActivatedPads-1] = 2;
804 if (fTimeDelayFlag) {
805 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
806 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
807 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
808 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
809 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
810 } else {
811 timeDelay[nActivatedPads-1] = 0.;
812 }
813 padId[nActivatedPads-1] = 3;
814
815 // D:
816 if(z < k && z > 0) {
817 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
818 nActivatedPads++;
819 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX() - 1;
820 eff[nActivatedPads-1] = effX * effZ;
821 (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
822 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
823
824 nTail[nActivatedPads-1] = 2;
825 if (fTimeDelayFlag) {
826 if (TMath::Abs(x) < TMath::Abs(z)) {
827 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
828 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
829 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
830 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
831 } else {
832 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
833 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
834 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
835 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
836 }
837 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
838 } else {
839 timeDelay[nActivatedPads-1] = 0.;
840 }
841 padId[nActivatedPads-1] = 4;
842 }
843 } // end D
844 } // end C
845
846 // E:
847 if(ix < AliTOFGeometry::NpadX() && dX > 0) {
848 nActivatedPads++;
849 nPlace[nActivatedPads-1] = nPlace[0] + 1;
850 eff[nActivatedPads-1] = effX;
851 res[nActivatedPads-1] = 0.001 * (TMath::Sqrt(fAddTRes*fAddTRes + resX * resX)); // ns
852 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
853 nTail[nActivatedPads-1] = 2;
854 if (fTimeDelayFlag) {
855 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
856 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
857 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
858 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
859 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
860 } else {
861 timeDelay[nActivatedPads-1] = 0.;
862 }
863 padId[nActivatedPads-1] = 5;
864
865
866 // F:
867 if(z < k && z > 0) {
868 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
869 nActivatedPads++;
870 nPlace[nActivatedPads - 1] = nPlace[0] + (3 - 2 * iz) * AliTOFGeometry::NpadX() + 1;
871 eff[nActivatedPads - 1] = effX * effZ;
872 (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
873 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001*timeWalkX; // ns
874 nTail[nActivatedPads-1] = 2;
875 if (fTimeDelayFlag) {
876 if (TMath::Abs(x) < TMath::Abs(z)) {
877 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
878 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
879 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
880 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
881 } else {
882 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
883 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
884 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
885 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
886 }
887 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
888 } else {
889 timeDelay[nActivatedPads-1] = 0.;
890 }
891 padId[nActivatedPads-1] = 6;
892 }
893 } // end F
894 } // end E
895 } // end if(x < k)
896
897
898 for (Int_t iPad = 0; iPad < nActivatedPads; iPad++) {
899 if (res[iPad] < fTimeResolution) res[iPad] = fTimeResolution;
900 if(gRandom->Rndm() < eff[iPad]) {
901 isFired[iPad] = kTRUE;
902 nFiredPads++;
903 if(fEdgeTails) {
904 if(nTail[iPad] == 0) {
905 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
906 } else {
907 ftail->SetParameters(res[iPad], 2. * res[iPad], kSigmaForTail[nTail[iPad]-1]);
908 Double_t timeAB = ftail->GetRandom();
909 tofTime[iPad] = geantTime + timeWalk[iPad] + timeDelay[iPad] + timeAB;
910 }
911 } else {
912 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
913 }
914 if (fAverageTimeFlag) {
915 averageTime += tofTime[iPad] * qInduced[iPad];
916 weightsSum += qInduced[iPad];
917 } else {
918 averageTime += tofTime[iPad];
919 weightsSum += 1.;
920 }
921 }
922 }
923 if (weightsSum!=0) averageTime /= weightsSum;
924 } // end else (fEdgeEffect != 0)
925}
926
927//__________________________________________________________________
928void AliTOFSDigitizer::PrintParameters()const
929{
930 //
931 // Print parameters used for sdigitization
932 //
933 AliInfo(Form(" ------------------- %s -------------", GetName()));
934 AliInfo(" Parameters used for TOF SDigitization ");
935 // Printing the parameters
936
937 AliInfo(Form(" Number of events: %i ", (fEvent2-fEvent1)));
938 AliInfo(Form(" from event %i to event %i", fEvent1, (fEvent2-1)));
939 AliInfo(Form(" Time Resolution (ns) %f Pad Efficiency: %f ", fTimeResolution, fpadefficiency));
940 AliInfo(Form(" Edge Effect option: %d", fEdgeEffect));
941
942 AliInfo(" Boundary Effect Simulation Parameters ");
943 AliInfo(Form(" Hparameter: %f H2parameter: %f Kparameter: %f K2parameter: %f", fHparameter, fH2parameter, fKparameter, fK2parameter));
944 AliInfo(Form(" Efficiency in the central region of the pad: %f", fEffCenter));
945 AliInfo(Form(" Efficiency at the boundary region of the pad: %f", fEffBoundary));
946 AliInfo(Form(" Efficiency value at H2parameter %f", fEff2Boundary));
947 AliInfo(Form(" Efficiency value at K2parameter %f", fEff3Boundary));
948 AliInfo(Form(" Resolution (ps) in the central region of the pad: %f", fResCenter));
949 AliInfo(Form(" Resolution (ps) at the boundary of the pad : %f", fResBoundary));
950 AliInfo(Form(" Slope (ps/K) for neighbouring pad : %f", fResSlope));
951 AliInfo(Form(" Time walk (ps) in the central region of the pad : %f", fTimeWalkCenter));
952 AliInfo(Form(" Time walk (ps) at the boundary of the pad : %f", fTimeWalkBoundary));
953 AliInfo(Form(" Slope (ps/K) for neighbouring pad : %f", fTimeWalkSlope));
954 AliInfo(" Pulse Heigth Simulation Parameters ");
955 AliInfo(Form(" Flag for delay due to the PulseHeightEffect : %d", fTimeDelayFlag));
956 AliInfo(Form(" Pulse Height Slope : %f", fPulseHeightSlope));
957 AliInfo(Form(" Time Delay Slope : %f", fTimeDelaySlope));
958 AliInfo(Form(" Minimum charge amount which could be induced : %f", fMinimumCharge));
959 AliInfo(Form(" Smearing in charge in (q1/q2) vs x plot : %f", fChargeSmearing));
960 AliInfo(Form(" Smearing in log of charge ratio : %f", fLogChargeSmearing));
961 AliInfo(Form(" Smearing in time in time vs log(q1/q2) plot : %f", fTimeSmearing));
962 AliInfo(Form(" Flag for average time : %d", fAverageTimeFlag));
963 AliInfo(Form(" Edge tails option : %d", fEdgeTails));
964
965}