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[u/mrichter/AliRoot.git] / TOF / AliTOFSDigitizer.cxx
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517b7f8f 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
88cb7938 16/* $Id$ */
17
517b7f8f 18//_________________________________________________________________________
19// This is a TTask that constructs SDigits out of Hits
ea7a588a 20// A Summable Digits is the "sum" of all hits in a pad
21// Detector response has been simulated via the method
22// SimulateDetectorResponse
517b7f8f 23//
ea7a588a 24//-- Authors: F. Pierella, A. De Caro
25// Use case: see AliTOFhits2sdigits.C macro in the CVS
517b7f8f 26//////////////////////////////////////////////////////////////////////////////
27
88cb7938 28
f8014e68 29#include <Riostream.h>
88cb7938 30#include <stdlib.h>
517b7f8f 31
88cb7938 32#include <TBenchmark.h>
33#include <TF1.h>
34#include <TFile.h>
35#include <TFolder.h>
36#include <TH1.h>
37#include <TParticle.h>
38#include <TROOT.h>
39#include <TSystem.h>
40#include <TTask.h>
41#include <TTree.h>
42
43#include "AliDetector.h"
44#include "AliLoader.h"
45#include "AliRun.h"
46#include "AliRunLoader.h"
47#include "AliTOF.h"
48#include "AliTOFConstants.h"
5919c40c 49#include "AliTOFHitMap.h"
50#include "AliTOFSDigit.h"
88cb7938 51#include "AliTOFSDigitizer.h"
517b7f8f 52#include "AliTOFhit.h"
016e1f91 53#include "AliTOFhitT0.h"
517b7f8f 54#include "AliTOFv1.h"
55#include "AliTOFv2.h"
56#include "AliTOFv3.h"
57#include "AliTOFv4.h"
5d12ce38 58#include "AliMC.h"
517b7f8f 59
60ClassImp(AliTOFSDigitizer)
61
62//____________________________________________________________________________
63 AliTOFSDigitizer::AliTOFSDigitizer():TTask("AliTOFSDigitizer","")
64{
65 // ctor
88cb7938 66
67 fRunLoader = 0 ;
68
ea7a588a 69 fEvent1=0;
70 fEvent2=0;
f73548c4 71 ftail = 0;
da3d3acd 72 fSelectedSector=-1; //0; // AdC
73 fSelectedPlate =-1; //0; // AdC
517b7f8f 74}
75
76//____________________________________________________________________________
85a5290f 77 AliTOFSDigitizer::AliTOFSDigitizer(const char* HeaderFile, Int_t evNumber1, Int_t nEvents):TTask("AliTOFSDigitizer","")
517b7f8f 78{
f73548c4 79 ftail = 0;
da3d3acd 80 fSelectedSector=-1; //0; // AdC // by default we sdigitize all sectors
81 fSelectedPlate =-1; //0; // AdC // by default we sdigitize all plates in all sectors
f73548c4 82
ea7a588a 83 fHeadersFile = HeaderFile ; // input filename (with hits)
ea7a588a 84 TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data() ) ;
85
86 //File was not opened yet
87 // open file and get alirun object
88 if(file == 0){
89 file = TFile::Open(fHeadersFile.Data(),"update") ;
90 gAlice = (AliRun *) file->Get("gAlice") ;
91 }
26e447bd 92
517b7f8f 93 // add Task to //root/Tasks folder
88cb7938 94 fRunLoader = AliRunLoader::Open(HeaderFile);//open session and mount on default event folder
95 if (fRunLoader == 0x0)
96 {
97 Fatal("AliTOFSDigitizer","Event is not loaded. Exiting");
98 return;
99 }
26e447bd 100
de864d79 101 fRunLoader->LoadHeader();
26e447bd 102 if (nEvents<0) {
103 fEvent1=0;
26e447bd 104 fEvent2 = (Int_t)((fRunLoader->TreeE())->GetEntries());
105 } else {
106 fEvent1=evNumber1;
107 fEvent2=fEvent1+nEvents;
108 }
109
110 // init parameters for sdigitization
111 InitParameters();
112
88cb7938 113 AliLoader* gime = fRunLoader->GetLoader("TOFLoader");
114 if (gime == 0x0)
115 {
116 Fatal("AliTOFSDigitizer","Can not find TOF loader in event. Exiting.");
117 return;
118 }
119 gime->PostSDigitizer(this);
517b7f8f 120}
121
122//____________________________________________________________________________
123 AliTOFSDigitizer::~AliTOFSDigitizer()
124{
125 // dtor
f73548c4 126}
127
128//____________________________________________________________________________
129void AliTOFSDigitizer::InitParameters()
130{
131 // set parameters for detector simulation
132
133 fTimeResolution =0.120;
134 fpadefficiency =0.99 ;
135 fEdgeEffect = 2 ;
136 fEdgeTails = 0 ;
137 fHparameter = 0.4 ;
138 fH2parameter = 0.15;
139 fKparameter = 0.5 ;
140 fK2parameter = 0.35;
141 fEffCenter = fpadefficiency;
142 fEffBoundary = 0.65;
143 fEff2Boundary = 0.90;
144 fEff3Boundary = 0.08;
145 fResCenter = 50. ;
146 fResBoundary = 70. ;
147 fResSlope = 40. ;
148 fTimeWalkCenter = 0. ;
149 fTimeWalkBoundary=0. ;
150 fTimeWalkSlope = 0. ;
151 fTimeDelayFlag = 1 ;
152 fPulseHeightSlope=2.0 ;
153 fTimeDelaySlope =0.060;
154 // was fMinimumCharge = TMath::Exp(fPulseHeightSlope*fKparameter/2.);
155 fMinimumCharge = TMath::Exp(-fPulseHeightSlope*fHparameter);
156 fChargeSmearing=0.0 ;
157 fLogChargeSmearing=0.13;
158 fTimeSmearing =0.022;
159 fAverageTimeFlag=0 ;
ea7a588a 160 fTdcBin = 50.; // 1 TDC bin = 50 ps
161 fAdcBin = 0.25; // 1 ADC bin = 0.25 pC (or 0.03 pC)
162 fAdcMean = 50.; // ADC distribution mpv value for Landau (in bins)
163 // it corresponds to a mean value of ~100 bins
164 fAdcRms = 25.; // ADC distribution rms value (in bins)
165 // it corresponds to distribution rms ~50 bins
f73548c4 166}
167
168//__________________________________________________________________
ea7a588a 169Double_t TimeWithTail(Double_t* x, Double_t* par)
f73548c4 170{
171 // sigma - par[0], alpha - par[1], part - par[2]
172 // at x<part*sigma - gauss
173 // at x>part*sigma - TMath::Exp(-x/alpha)
174 Float_t xx =x[0];
175 Double_t f;
176 if(xx<par[0]*par[2]) {
177 f = TMath::Exp(-xx*xx/(2*par[0]*par[0]));
178 } else {
179 f = TMath::Exp(-(xx-par[0]*par[2])/par[1]-0.5*par[2]*par[2]);
180 }
181 return f;
517b7f8f 182}
183
f73548c4 184
517b7f8f 185//____________________________________________________________________________
ea7a588a 186void AliTOFSDigitizer::Exec(Option_t *verboseOption, Option_t *allEvents) {
517b7f8f 187
88cb7938 188 fRunLoader->LoadgAlice();
26e447bd 189 //fRunLoader->LoadHeader();
c630aafd 190 fRunLoader->LoadKinematics();
88cb7938 191 gAlice = fRunLoader->GetAliRun();
192
193 AliLoader* gime = fRunLoader->GetLoader("TOFLoader");
194 gime->LoadHits("read");
195 gime->LoadSDigits("recreate");
ea7a588a 196 if(strstr(verboseOption,"tim") || strstr(verboseOption,"all"))
197 gBenchmark->Start("TOFSDigitizer");
517b7f8f 198
88cb7938 199 AliTOF *TOF = (AliTOF *) gAlice->GetDetector("TOF");
517b7f8f 200
5919c40c 201 if (!TOF) {
202 Error("AliTOFSDigitizer","TOF not found");
203 return;
204 }
205
55991c8b 206 // is pointer to fSDigits non zero after changes?
207 cout<<"TOF fSDigits pointer:"<<TOF->SDigits()<<endl;
208
209 // recreate TClonesArray fSDigits - for backward compatibility
210 if (TOF->SDigits() == 0) {
211 TOF->CreateSDigitsArray();
212 } else {
213 TOF->RecreateSDigitsArray();
214 }
215
016e1f91 216 Int_t version=TOF->IsVersion();
55991c8b 217
ea7a588a 218 if (fEdgeTails) ftail = new TF1("tail",TimeWithTail,-2,2,3);
219
220 Int_t nselectedHits=0;
221 Int_t ntotalsdigits=0;
222 Int_t ntotalupdates=0;
223 Int_t nnoisesdigits=0;
224 Int_t nsignalsdigits=0;
225 Int_t nHitsFromPrim=0;
226 Int_t nHitsFromSec=0;
227 Int_t nlargeTofDiff=0;
f73548c4 228
ea7a588a 229 if (strstr(allEvents,"all")){
230 fEvent1=0;
231 fEvent2= (Int_t) gAlice->TreeE()->GetEntries();
232 }
233
da3d3acd 234 //Bool_t thereIsNotASelection=(fSelectedSector==0) && (fSelectedPlate==0); // AdC
235 Bool_t thereIsNotASelection=(fSelectedSector==-1) && (fSelectedPlate==-1);
55991c8b 236
ea7a588a 237 for (Int_t ievent = fEvent1; ievent < fEvent2; ievent++) {
238 cout << "------------------- "<< GetName() << " -------------" << endl ;
239 cout << "Sdigitizing event " << ievent << endl;
240
241 Int_t nselectedHitsinEv=0;
242 Int_t ntotalsdigitsinEv=0;
243 Int_t ntotalupdatesinEv=0;
244 Int_t nnoisesdigitsinEv=0;
245 Int_t nsignalsdigitsinEv=0;
517b7f8f 246
88cb7938 247 fRunLoader->GetEvent(ievent);
248 TOF->SetTreeAddress();
249 TTree *TH = gime->TreeH ();
5919c40c 250 if (!TH)
251 return;
88cb7938 252 if (gime->TreeS () == 0)
253 gime->MakeTree ("S");
517b7f8f 254
255
5919c40c 256 //Make branches
257 char branchname[20];
258 sprintf (branchname, "%s", TOF->GetName ());
259 //Make branch for digits
88cb7938 260 TOF->MakeBranch("S");
517b7f8f 261
5919c40c 262 //Now made SDigits from hits
263
016e1f91 264
5919c40c 265 TParticle *particle;
016e1f91 266 //AliTOFhit *tofHit;
5919c40c 267 TClonesArray *TOFhits = TOF->Hits();
268
f73548c4 269 // create hit map
5919c40c 270 AliTOFHitMap *hitMap = new AliTOFHitMap(TOF->SDigits());
271
55991c8b 272 // increase performances in terms of CPU time
d7ccea72 273 //PH TH->SetBranchStatus("*",0); // switch off all branches
274 //PH TH->SetBranchStatus("TOF*",1); // switch on only TOF
275
276 TBranch * tofHitsBranch = TH->GetBranch("TOF");
bfec09a6 277
5919c40c 278 Int_t ntracks = static_cast<Int_t>(TH->GetEntries());
279 for (Int_t track = 0; track < ntracks; track++)
280 {
281 gAlice->ResetHits();
d7ccea72 282 //PH TH->GetEvent(track);
283 tofHitsBranch->GetEvent(track);
5d12ce38 284 particle = gAlice->GetMCApp()->Particle(track);
5919c40c 285 Int_t nhits = TOFhits->GetEntriesFast();
f73548c4 286 // cleaning all hits of the same track in the same pad volume
287 // it is a rare event, however it happens
288
da3d3acd 289 Int_t previousTrack =-1; //0; // AdC
290 Int_t previousSector=-1; //0; // AdC
291 Int_t previousPlate =-1; //0; // AdC
292 Int_t previousStrip =-1; //0; // AdC
293 Int_t previousPadX =-1; //0; // AdC
294 Int_t previousPadZ =-1; //0; // AdC
5919c40c 295
296 for (Int_t hit = 0; hit < nhits; hit++)
297 {
016e1f91 298 Int_t vol[5]; // location for a digit
299 Float_t digit[2]; // TOF digit variables
300 Int_t tracknum;
301 Float_t Xpad;
302 Float_t Zpad;
303 Float_t geantTime;
304
305 // fp: really sorry for this, it is a temporary trick to have
306 // track length too
307 if(version!=6){
308 AliTOFhit *tofHit = (AliTOFhit *) TOFhits->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 Xpad = tofHit->GetDx();
316 Zpad = tofHit->GetDz();
317 geantTime = tofHit->GetTof(); // unit [s]
318 } else {
319 AliTOFhitT0 *tofHit = (AliTOFhitT0 *) TOFhits->UncheckedAt(hit);
320 tracknum = tofHit->GetTrack();
321 vol[0] = tofHit->GetSector();
322 vol[1] = tofHit->GetPlate();
55991c8b 323 vol[2] = tofHit->GetStrip();
324 vol[3] = tofHit->GetPadx();
325 vol[4] = tofHit->GetPadz();
016e1f91 326 Xpad = tofHit->GetDx();
327 Zpad = tofHit->GetDz();
328 geantTime = tofHit->GetTof(); // unit [s]
329 }
330
331 geantTime *= 1.e+09; // conversion from [s] to [ns]
332
333 // selection case for sdigitizing only hits in a given plate of a given sector
334 if(thereIsNotASelection || (vol[0]==fSelectedSector && vol[1]==fSelectedPlate)){
55991c8b 335
336 Bool_t dummy=((tracknum==previousTrack) && (vol[0]==previousSector) && (vol[1]==previousPlate) && (vol[2]==previousStrip));
337
338 Bool_t isCloneOfThePrevious=dummy && ((vol[3]==previousPadX) && (vol[4]==previousPadZ));
339
b213b8bd 340 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))));
55991c8b 341
b213b8bd 342 if(!isCloneOfThePrevious && !isNeighOfThePrevious){
55991c8b 343 // update "previous" values
344 // in fact, we are yet in the future, so the present is past
345 previousTrack=tracknum;
346 previousSector=vol[0];
347 previousPlate=vol[1];
348 previousStrip=vol[2];
349 previousPadX=vol[3];
350 previousPadZ=vol[4];
351
352 nselectedHits++;
353 nselectedHitsinEv++;
354 if (particle->GetFirstMother() < 0){
355 nHitsFromPrim++;
356 } // counts hits due to primary particles
357
da3d3acd 358 //Float_t xStrip=AliTOFConstants::fgkXPad*(vol[3]-0.5-0.5*AliTOFConstants::fgkNpadX)+Xpad;
359 //Float_t zStrip=AliTOFConstants::fgkZPad*(vol[4]-0.5-0.5*AliTOFConstants::fgkNpadZ)+Zpad;
360 Float_t xStrip=AliTOFConstants::fgkXPad*(vol[3]+0.5-0.5*AliTOFConstants::fgkNpadX)+Xpad; // AdC
361 Float_t zStrip=AliTOFConstants::fgkZPad*(vol[4]+0.5-0.5*AliTOFConstants::fgkNpadZ)+Zpad; // AdC
016e1f91 362
55991c8b 363 //cout << "geantTime " << geantTime << " [ns]" << endl;
364 Int_t nActivatedPads = 0, nFiredPads = 0;
365 Bool_t isFired[4] = {kFALSE, kFALSE, kFALSE, kFALSE};
366 Float_t tofAfterSimul[4] = {0., 0., 0., 0.};
367 Float_t qInduced[4] = {0.,0.,0.,0.};
368 Int_t nPlace[4] = {0, 0, 0, 0};
369 Float_t averageTime = 0.;
370 SimulateDetectorResponse(zStrip,xStrip,geantTime,nActivatedPads,nFiredPads,isFired,nPlace,qInduced,tofAfterSimul,averageTime);
371 if(nFiredPads) {
372 for(Int_t indexOfPad=0; indexOfPad<nActivatedPads; indexOfPad++) {
373 if(isFired[indexOfPad]){ // the pad has fired
374 Float_t timediff=geantTime-tofAfterSimul[indexOfPad];
375
376 if(timediff>=0.2) nlargeTofDiff++;
377
b213b8bd 378 digit[0] = (Int_t) ((tofAfterSimul[indexOfPad]*1.e+03)/fTdcBin); // TDC bin number (each bin -> 50. ps)
55991c8b 379
380 Float_t landauFactor = gRandom->Landau(fAdcMean, fAdcRms);
381 digit[1] = (Int_t) (qInduced[indexOfPad] * landauFactor); // ADC bins (each bin -> 0.25 (or 0.03) pC)
382
383 // recalculate the volume only for neighbouring pads
ea7a588a 384 if(indexOfPad){
da3d3acd 385 (nPlace[indexOfPad]<=AliTOFConstants::fgkNpadX) ? vol[4] = 0/*1*/ : vol[4] = 1/*2*/; // AdC
386 (nPlace[indexOfPad]<=AliTOFConstants::fgkNpadX) ? vol[3] = nPlace[indexOfPad] - 1 : vol[3] = nPlace[indexOfPad] - AliTOFConstants::fgkNpadX - 1; // AdC
ea7a588a 387 }
55991c8b 388
389 // check if two sdigit are on the same pad; in that case we sum
390 // the two or more sdigits
391 if (hitMap->TestHit(vol) != kEmpty) {
392 AliTOFSDigit *sdig = static_cast<AliTOFSDigit*>(hitMap->GetHit(vol));
393 Int_t tdctime = (Int_t) digit[0];
394 Int_t adccharge = (Int_t) digit[1];
b213b8bd 395 sdig->Update(fTdcBin,tdctime,adccharge,tracknum);
55991c8b 396 ntotalupdatesinEv++;
397 ntotalupdates++;
398 } else {
399
400 TOF->AddSDigit(tracknum, vol, digit);
401
402 if(indexOfPad){
403 nnoisesdigits++;
404 nnoisesdigitsinEv++;
405 } else {
406 nsignalsdigits++;
407 nsignalsdigitsinEv++;
408 }
409 ntotalsdigitsinEv++;
410 ntotalsdigits++;
411 hitMap->SetHit(vol);
412 } // if (hitMap->TestHit(vol) != kEmpty)
413 } // if(isFired[indexOfPad])
414 } // end loop on nActivatedPads
415 } // if(nFiredPads) i.e. if some pads has fired
416 } // close if(!isCloneOfThePrevious)
417 } // close the selection on sector and plate
5919c40c 418 } // end loop on hits for the current track
419 } // end loop on ntracks
55991c8b 420
5919c40c 421 delete hitMap;
517b7f8f 422
88cb7938 423 gime->TreeS()->Reset();
424 gime->TreeS()->Fill();
ea7a588a 425 //gAlice->TreeS()->Write(0,TObject::kOverwrite) ;
88cb7938 426 gime->WriteSDigits("OVERWRITE");
ea7a588a 427
428 if(strstr(verboseOption,"all")){
429 cout << "----------------------------------------" << endl;
430 cout << " <AliTOFSDigitizer> " << endl;
431 cout << "After sdigitizing " << nselectedHitsinEv << " hits" << " in event " << ievent << endl;
432 //" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
433 cout << ntotalsdigitsinEv << " digits have been created " << endl;
434 cout << "(" << nsignalsdigitsinEv << " due to signals and " << nnoisesdigitsinEv << " due to border effect)" << endl;
435 cout << ntotalupdatesinEv << " total updates of the hit map have been performed in current event" << endl;
436 cout << "----------------------------------------" << endl;
437 }
438
439 } //event loop on events
440
441 // free used memory
442 if (ftail){
443 delete ftail;
444 ftail = 0;
445 }
446
447 nHitsFromSec=nselectedHits-nHitsFromPrim;
448 if(strstr(verboseOption,"all")){
449 cout << "----------------------------------------" << endl;
450 cout << "----------------------------------------" << endl;
451 cout << "-----------SDigitization Summary--------" << endl;
452 cout << " <AliTOFSDigitizer> " << endl;
453 cout << "After sdigitizing " << nselectedHits << " hits" << endl;
454 cout << "in " << (fEvent2-fEvent1) << " events" << endl;
455//" (" << nHitsFromPrim << " from primaries and " << nHitsFromSec << " from secondaries) TOF hits, "
456 cout << ntotalsdigits << " sdigits have been created " << endl;
457 cout << "(" << nsignalsdigits << " due to signals and " << nnoisesdigits << " due to border effect)" << endl;
458 cout << ntotalupdates << " total updates of the hit map have been performed" << endl;
459 cout << "in " << nlargeTofDiff << " cases the time of flight difference is greater than 200 ps" << endl;
460 }
461
517b7f8f 462
ea7a588a 463 if(strstr(verboseOption,"tim") || strstr(verboseOption,"all")){
464 gBenchmark->Stop("TOFSDigitizer");
465 cout << "AliTOFSDigitizer:" << endl ;
466 cout << " took " << gBenchmark->GetCpuTime("TOFSDigitizer") << " seconds in order to make sdigits "
467 << gBenchmark->GetCpuTime("TOFSDigitizer")/(fEvent2-fEvent1) << " seconds per event " << endl ;
468 cout << endl ;
469 }
517b7f8f 470
ea7a588a 471 Print("");
517b7f8f 472}
ea7a588a 473
517b7f8f 474//__________________________________________________________________
5c016a7b 475void AliTOFSDigitizer::Print(Option_t* /*opt*/)const
517b7f8f 476{
477 cout << "------------------- "<< GetName() << " -------------" << endl ;
bfec09a6 478
517b7f8f 479}
f73548c4 480
55991c8b 481//__________________________________________________________________
482void AliTOFSDigitizer::SelectSectorAndPlate(Int_t sector, Int_t plate)
483{
da3d3acd 484 //Bool_t isaWrongSelection=(sector < 1) || (sector > AliTOFConstants::fgkNSectors) || (plate < 1) || (plate > AliTOFConstants::fgkNPlates);
485 Bool_t isaWrongSelection=(sector < 0) || (sector >= AliTOFConstants::fgkNSectors) || (plate < 0) || (plate >= AliTOFConstants::fgkNPlates); // AdC
55991c8b 486 if(isaWrongSelection){
487 cout << "You have selected an invalid value for sector or plate " << endl;
da3d3acd 488 //cout << "The correct range for sector is [1,"<< AliTOFConstants::fgkNSectors <<"]" << endl;
489 //cout << "The correct range for plate is [1,"<< AliTOFConstants::fgkNPlates <<"]" << endl;
490 cout << "The correct range for sector is [0,"<< AliTOFConstants::fgkNSectors-1 <<"]\n"; // AdC
491 cout << "The correct range for plate is [0,"<< AliTOFConstants::fgkNPlates-1 <<"]\n"; // AdC
55991c8b 492 cout << "By default we continue sdigitizing all hits in all plates of all sectors" << endl;
493 } else {
494 fSelectedSector=sector;
495 fSelectedPlate =plate;
496 cout << "SDigitizing only hits in plate " << fSelectedPlate << " of the sector " << fSelectedSector << endl;
497 }
498}
499
f73548c4 500//__________________________________________________________________
501void 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)
502{
503 // Description:
504 // Input: z0, x0 - hit position in the strip system (0,0 - center of the strip), cm
505 // geantTime - time generated by Geant, ns
506 // Output: nActivatedPads - the number of pads activated by the hit (1 || 2 || 4)
507 // nFiredPads - the number of pads fired (really activated) by the hit (nFiredPads <= nActivatedPads)
508 // qInduced[iPad]- charge induced on pad, arb. units
509 // this array is initialized at zero by the caller
510 // tofAfterSimul[iPad] - time calculated with edge effect algorithm, ns
511 // this array is initialized at zero by the caller
512 // 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.
513 // The weight is given by the qInduced[iPad]/qCenterPad
514 // this variable is initialized at zero by the caller
515 // nPlace[iPad] - the number of the pad place, iPad = 0, 1, 2, 3
516 // this variable is initialized at zero by the caller
517 //
518 // Description of used variables:
519 // eff[iPad] - efficiency of the pad
520 // res[iPad] - resolution of the pad, ns
521 // timeWalk[iPad] - time walk of the pad, ns
522 // timeDelay[iPad] - time delay for neighbouring pad to hited pad, ns
523 // PadId[iPad] - Pad Identifier
524 // E | F --> PadId[iPad] = 5 | 6
525 // A | B --> PadId[iPad] = 1 | 2
526 // C | D --> PadId[iPad] = 3 | 4
527 // nTail[iPad] - the tail number, = 1 for tailA, = 2 for tailB
528 // qCenterPad - charge extimated for each pad, arb. units
529 // weightsSum - sum of weights extimated for each pad fired, arb. units
530
531 const Float_t kSigmaForTail[2] = {AliTOFConstants::fgkSigmaForTail1,AliTOFConstants::fgkSigmaForTail2}; //for tail
532 Int_t iz = 0, ix = 0;
533 Float_t dX = 0., dZ = 0., x = 0., z = 0.;
534 Float_t h = fHparameter, h2 = fH2parameter, k = fKparameter, k2 = fK2parameter;
535 Float_t effX = 0., effZ = 0., resX = 0., resZ = 0., timeWalkX = 0., timeWalkZ = 0.;
536 Float_t logOfqInd = 0.;
537 Float_t weightsSum = 0.;
538 Int_t nTail[4] = {0,0,0,0};
539 Int_t padId[4] = {0,0,0,0};
540 Float_t eff[4] = {0.,0.,0.,0.};
541 Float_t res[4] = {0.,0.,0.,0.};
542 // Float_t qCenterPad = fMinimumCharge * fMinimumCharge;
543 Float_t qCenterPad = 1.;
544 Float_t timeWalk[4] = {0.,0.,0.,0.};
545 Float_t timeDelay[4] = {0.,0.,0.,0.};
546
547 nActivatedPads = 0;
548 nFiredPads = 0;
549
550 (z0 <= 0) ? iz = 0 : iz = 1;
551 dZ = z0 + (0.5 * AliTOFConstants::fgkNpadZ - iz - 0.5) * AliTOFConstants::fgkZPad; // hit position in the pad frame, (0,0) - center of the pad
552 z = 0.5 * AliTOFConstants::fgkZPad - TMath::Abs(dZ); // variable for eff., res. and timeWalk. functions
553 iz++; // z row: 1, ..., AliTOFConstants::fgkNpadZ = 2
554 ix = (Int_t)((x0 + 0.5 * AliTOFConstants::fgkNpadX * AliTOFConstants::fgkXPad) / AliTOFConstants::fgkXPad);
555 dX = x0 + (0.5 * AliTOFConstants::fgkNpadX - ix - 0.5) * AliTOFConstants::fgkXPad; // hit position in the pad frame, (0,0) - center of the pad
556 x = 0.5 * AliTOFConstants::fgkXPad - TMath::Abs(dX); // variable for eff., res. and timeWalk. functions;
557 ix++; // x row: 1, ..., AliTOFConstants::fgkNpadX = 48
558
559 ////// Pad A:
560 nActivatedPads++;
561 nPlace[nActivatedPads-1] = (iz - 1) * AliTOFConstants::fgkNpadX + ix;
562 qInduced[nActivatedPads-1] = qCenterPad;
563 padId[nActivatedPads-1] = 1;
564
565 if (fEdgeEffect == 0) {
566 eff[nActivatedPads-1] = fEffCenter;
567 if (gRandom->Rndm() < eff[nActivatedPads-1]) {
568 nFiredPads = 1;
569 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + fResCenter * fResCenter); // 10400=30^2+20^2+40^2+50^2+50^2+50^2 ns;
570 isFired[nActivatedPads-1] = kTRUE;
571 tofTime[nActivatedPads-1] = gRandom->Gaus(geantTime + fTimeWalkCenter, res[0]);
572 averageTime = tofTime[nActivatedPads-1];
573 }
574 } else {
575
576 if(z < h) {
577 if(z < h2) {
578 effZ = fEffBoundary + (fEff2Boundary - fEffBoundary) * z / h2;
579 } else {
580 effZ = fEff2Boundary + (fEffCenter - fEff2Boundary) * (z - h2) / (h - h2);
581 }
582 resZ = fResBoundary + (fResCenter - fResBoundary) * z / h;
583 timeWalkZ = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * z / h;
584 nTail[nActivatedPads-1] = 1;
585 } else {
586 effZ = fEffCenter;
587 resZ = fResCenter;
588 timeWalkZ = fTimeWalkCenter;
589 }
590
591 if(x < h) {
592 if(x < h2) {
593 effX = fEffBoundary + (fEff2Boundary - fEffBoundary) * x / h2;
594 } else {
595 effX = fEff2Boundary + (fEffCenter - fEff2Boundary) * (x - h2) / (h - h2);
596 }
597 resX = fResBoundary + (fResCenter - fResBoundary) * x / h;
598 timeWalkX = fTimeWalkBoundary + (fTimeWalkCenter - fTimeWalkBoundary) * x / h;
599 nTail[nActivatedPads-1] = 1;
600 } else {
601 effX = fEffCenter;
602 resX = fResCenter;
603 timeWalkX = fTimeWalkCenter;
604 }
605
606 (effZ<effX) ? eff[nActivatedPads-1] = effZ : eff[nActivatedPads-1] = effX;
607 (resZ<resX) ? res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resX * resX) : res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resZ * resZ); // 10400=30^2+20^2+40^2+50^2+50^2+50^2 ns
608 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
609
610
611 ////// Pad B:
612 if(z < k2) {
613 effZ = fEffBoundary - (fEffBoundary - fEff3Boundary) * (z / k2);
614 } else {
615 effZ = fEff3Boundary * (k - z) / (k - k2);
616 }
617 resZ = fResBoundary + fResSlope * z / k;
618 timeWalkZ = fTimeWalkBoundary + fTimeWalkSlope * z / k;
619
620 if(z < k && z > 0) {
621 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
622 nActivatedPads++;
623 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFConstants::fgkNpadX;
624 eff[nActivatedPads-1] = effZ;
625 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resZ * resZ); // 10400=30^2+20^2+40^2+50^2+50^2+50^2 ns
626 timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ; // ns
627 nTail[nActivatedPads-1] = 2;
628 if (fTimeDelayFlag) {
629 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
630 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
631 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
632 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
633 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
634 } else {
635 timeDelay[nActivatedPads-1] = 0.;
636 }
637 padId[nActivatedPads-1] = 2;
638 }
639 }
640
641
642 ////// Pad C, D, E, F:
643 if(x < k2) {
644 effX = fEffBoundary - (fEffBoundary - fEff3Boundary) * (x / k2);
645 } else {
646 effX = fEff3Boundary * (k - x) / (k - k2);
647 }
648 resX = fResBoundary + fResSlope*x/k;
649 timeWalkX = fTimeWalkBoundary + fTimeWalkSlope*x/k;
650
651 if(x < k && x > 0) {
652 // C:
653 if(ix > 1 && dX < 0) {
654 nActivatedPads++;
655 nPlace[nActivatedPads-1] = nPlace[0] - 1;
656 eff[nActivatedPads-1] = effX;
657 res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resX * resX); // 10400=30^2+20^2+40^2+50^2+50^2+50^2 ns
658 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
659 nTail[nActivatedPads-1] = 2;
660 if (fTimeDelayFlag) {
661 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
662 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
663 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
664 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
665 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
666 } else {
667 timeDelay[nActivatedPads-1] = 0.;
668 }
669 padId[nActivatedPads-1] = 3;
670
671 // D:
672 if(z < k && z > 0) {
673 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
674 nActivatedPads++;
675 nPlace[nActivatedPads-1] = nPlace[0] + (3 - 2 * iz) * AliTOFConstants::fgkNpadX - 1;
676 eff[nActivatedPads-1] = effX * effZ;
677 (resZ<resX) ? res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resX * resX) : res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resZ * resZ); // 10400=30^2+20^2+40^2+50^2+50^2+50^2 ns
678 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
679
680 nTail[nActivatedPads-1] = 2;
681 if (fTimeDelayFlag) {
682 if (TMath::Abs(x) < TMath::Abs(z)) {
683 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
684 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
685 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
686 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
687 } else {
688 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
689 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
690 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
691 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
692 }
693 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
694 } else {
695 timeDelay[nActivatedPads-1] = 0.;
696 }
697 padId[nActivatedPads-1] = 4;
698 }
699 } // end D
700 } // end C
701
702 // E:
703 if(ix < AliTOFConstants::fgkNpadX && dX > 0) {
704 nActivatedPads++;
705 nPlace[nActivatedPads-1] = nPlace[0] + 1;
706 eff[nActivatedPads-1] = effX;
707 res[nActivatedPads-1] = 0.001 * (TMath::Sqrt(10400 + resX * resX)); // ns
708 timeWalk[nActivatedPads-1] = 0.001 * timeWalkX; // ns
709 nTail[nActivatedPads-1] = 2;
710 if (fTimeDelayFlag) {
711 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
712 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
713 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
714 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
715 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
716 } else {
717 timeDelay[nActivatedPads-1] = 0.;
718 }
719 padId[nActivatedPads-1] = 5;
720
721
722 // F:
723 if(z < k && z > 0) {
724 if( (iz == 1 && dZ > 0) || (iz == 2 && dZ < 0) ) {
725 nActivatedPads++;
726 nPlace[nActivatedPads - 1] = nPlace[0] + (3 - 2 * iz) * AliTOFConstants::fgkNpadX + 1;
727 eff[nActivatedPads - 1] = effX * effZ;
728 (resZ<resX) ? res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resX * resX) : res[nActivatedPads-1] = 0.001 * TMath::Sqrt(10400 + resZ * resZ); // 10400=30^2+20^2+40^2+50^2+50^2+50^2 ns
729 (timeWalkZ<timeWalkX) ? timeWalk[nActivatedPads-1] = 0.001 * timeWalkZ : timeWalk[nActivatedPads-1] = 0.001*timeWalkX; // ns
730 nTail[nActivatedPads-1] = 2;
731 if (fTimeDelayFlag) {
732 if (TMath::Abs(x) < TMath::Abs(z)) {
733 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * z / 2.);
734 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * z / 2.);
735 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * z);
736 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * z, fLogChargeSmearing);
737 } else {
738 // qInduced[0] = fMinimumCharge * TMath::Exp(fPulseHeightSlope * x / 2.);
739 // qInduced[nActivatedPads-1] = fMinimumCharge * TMath::Exp(-fPulseHeightSlope * x / 2.);
740 qInduced[nActivatedPads-1] = TMath::Exp(-fPulseHeightSlope * x);
741 logOfqInd = gRandom->Gaus(-fPulseHeightSlope * x, fLogChargeSmearing);
742 }
743 timeDelay[nActivatedPads-1] = gRandom->Gaus(-fTimeDelaySlope * logOfqInd, fTimeSmearing);
744 } else {
745 timeDelay[nActivatedPads-1] = 0.;
746 }
747 padId[nActivatedPads-1] = 6;
748 }
749 } // end F
750 } // end E
751 } // end if(x < k)
752
753
754 for (Int_t iPad = 0; iPad < nActivatedPads; iPad++) {
755 if (res[iPad] < fTimeResolution) res[iPad] = fTimeResolution;
756 if(gRandom->Rndm() < eff[iPad]) {
757 isFired[iPad] = kTRUE;
758 nFiredPads++;
759 if(fEdgeTails) {
760 if(nTail[iPad] == 0) {
761 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
762 } else {
763 ftail->SetParameters(res[iPad], 2. * res[iPad], kSigmaForTail[nTail[iPad]-1]);
764 Double_t timeAB = ftail->GetRandom();
765 tofTime[iPad] = geantTime + timeWalk[iPad] + timeDelay[iPad] + timeAB;
766 }
767 } else {
768 tofTime[iPad] = gRandom->Gaus(geantTime + timeWalk[iPad] + timeDelay[iPad], res[iPad]);
769 }
770 if (fAverageTimeFlag) {
771 averageTime += tofTime[iPad] * qInduced[iPad];
772 weightsSum += qInduced[iPad];
773 } else {
774 averageTime += tofTime[iPad];
775 weightsSum += 1.;
776 }
777 }
778 }
779 if (weightsSum!=0) averageTime /= weightsSum;
780 } // end else (fEdgeEffect != 0)
781}
782
783//__________________________________________________________________
784void AliTOFSDigitizer::PrintParameters()const
785{
786 //
787 // Print parameters used for sdigitization
788 //
789 cout << " ------------------- "<< GetName() << " -------------" << endl ;
790 cout << " Parameters used for TOF SDigitization " << endl ;
791 // Printing the parameters
792
ea7a588a 793 cout << " Number of events: " << (fEvent2-fEvent1) << endl;
794 cout << " from event " << fEvent1 << " to event " << (fEvent2-1) << endl;
f73548c4 795 cout << " Time Resolution (ns) "<< fTimeResolution <<" Pad Efficiency: "<< fpadefficiency << endl;
796 cout << " Edge Effect option: "<< fEdgeEffect<< endl;
797
798 cout << " Boundary Effect Simulation Parameters " << endl;
799 cout << " Hparameter: "<< fHparameter<<" H2parameter:"<< fH2parameter <<" Kparameter:"<< fKparameter<<" K2parameter: "<< fK2parameter << endl;
800 cout << " Efficiency in the central region of the pad: "<< fEffCenter << endl;
801 cout << " Efficiency at the boundary region of the pad: "<< fEffBoundary << endl;
802 cout << " Efficiency value at H2parameter "<< fEff2Boundary << endl;
803 cout << " Efficiency value at K2parameter "<< fEff3Boundary << endl;
804 cout << " Resolution (ps) in the central region of the pad: "<< fResCenter << endl;
805 cout << " Resolution (ps) at the boundary of the pad : "<< fResBoundary << endl;
806 cout << " Slope (ps/K) for neighbouring pad : "<< fResSlope <<endl;
807 cout << " Time walk (ps) in the central region of the pad : "<< fTimeWalkCenter << endl;
808 cout << " Time walk (ps) at the boundary of the pad : "<< fTimeWalkBoundary<< endl;
809 cout << " Slope (ps/K) for neighbouring pad : "<< fTimeWalkSlope<<endl;
810 cout << " Pulse Heigth Simulation Parameters " << endl;
811 cout << " Flag for delay due to the PulseHeightEffect: "<< fTimeDelayFlag <<endl;
812 cout << " Pulse Height Slope : "<< fPulseHeightSlope<<endl;
813 cout << " Time Delay Slope : "<< fTimeDelaySlope<<endl;
814 cout << " Minimum charge amount which could be induced : "<< fMinimumCharge<<endl;
815 cout << " Smearing in charge in (q1/q2) vs x plot : "<< fChargeSmearing<<endl;
816 cout << " Smearing in log of charge ratio : "<< fLogChargeSmearing<<endl;
817 cout << " Smearing in time in time vs log(q1/q2) plot : "<< fTimeSmearing<<endl;
818 cout << " Flag for average time : "<< fAverageTimeFlag<<endl;
819 cout << " Edge tails option : "<< fEdgeTails << endl;
820
821}