Added option for different binning of DCAxy axis in THnSparse. Same width for all...
[u/mrichter/AliRoot.git] / ITS / AliITSsimulationSPD.cxx
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c7a4dac0 1/**************************************************************************
20eef074 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**************************************************************************/
c7a4dac0 15
5bfe44ce 16/*
85f5e9c2 17$Id$
5bfe44ce 18*/
f8d9a5b8 19
5bfe44ce 20#include <Riostream.h>
f7a1cc68 21#include <TGeoGlobalMagField.h>
b0f5e3fc 22#include <TH1.h>
9f033001 23#include <TString.h>
e8189707 24#include "AliITS.h"
e869281d 25#include "AliITSdigitSPD.h"
5bfe44ce 26#include "AliITShit.h"
9f033001 27#include "AliITSmodule.h"
c7a4dac0 28#include "AliITSpList.h"
5bfe44ce 29#include "AliITSCalibrationSPD.h"
30#include "AliITSsegmentationSPD.h"
b0f5e3fc 31#include "AliITSsimulationSPD.h"
f77f13c8 32#include "AliLog.h"
5bfe44ce 33#include "AliRun.h"
a4005be7 34#include "AliMagF.h"
bb7e41dd 35#include "AliMathBase.h"
9f033001 36
bb6b39bf 37//#define DEBUG
e8189707 38
b0f5e3fc 39ClassImp(AliITSsimulationSPD)
40////////////////////////////////////////////////////////////////////////
5bfe44ce 41// Version: 1
590d15ee 42// Modified by D. Elia, G.E. Bruno, H. Tydesjo
43// Fast diffusion code by Bjorn S. Nilsen
5bfe44ce 44// March-April 2006
8e2f60b2 45// October 2007: GetCalibrationObjects() removed
b0f5e3fc 46//
5bfe44ce 47// Version: 0
48// Written by Boris Batyunya
49// December 20 1999
21b825a4 50//
5bfe44ce 51//
52// AliITSsimulationSPD is to do the simulation of SPDs.
53//
54////////////////////////////////////////////////////////////////////////
55
c7a4dac0 56//______________________________________________________________________
5bfe44ce 57AliITSsimulationSPD::AliITSsimulationSPD():
58AliITSsimulation(),
59fHis(0),
60fSPDname(),
a4005be7 61fCoupling(),
62fLorentz(kFALSE),
20eef074 63fTanLorAng(0),
64fStrobe(kTRUE),
65fStrobeLenght(4),
66fStrobePhase(-12.5e-9){
67 // Default constructor.
68 // Inputs:
69 // none.
70 // Outputs:
71 // none.
72 // Return:
73 // A default constructed AliITSsimulationSPD class.
74
75 AliDebug(1,Form("Calling default constructor"));
5bfe44ce 76// Init();
b0f5e3fc 77}
c7a4dac0 78//______________________________________________________________________
8ba39da9 79AliITSsimulationSPD::AliITSsimulationSPD(AliITSDetTypeSim *dettyp):
80AliITSsimulation(dettyp),
5bfe44ce 81fHis(0),
82fSPDname(),
a4005be7 83fCoupling(),
84fLorentz(kFALSE),
20eef074 85fTanLorAng(0),
86fStrobe(kTRUE),
87fStrobeLenght(4),
88fStrobePhase(-12.5e-9){
89 // standard constructor
90 // Inputs:
91 // AliITSsegmentation *seg A pointer to the segmentation class
92 // to be used for this simulation
93 // AliITSCalibration *resp A pointer to the responce class to
94 // be used for this simulation
95 // Outputs:
96 // none.
97 // Return:
98 // A default constructed AliITSsimulationSPD class.
99
100 AliDebug(1,Form("Calling standard constructor "));
101 Init();
aacedc3e 102}
103//______________________________________________________________________
5bfe44ce 104void AliITSsimulationSPD::Init(){
20eef074 105 // Initilization
106 // Inputs:
107 // none.
108 // Outputs:
109 // none.
110 // Return:
111 // none.
112 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
113
114 SetModuleNumber(0);
115 SetEventNumber(0);
116 SetMap(new AliITSpList(GetNPixelsZ(),GetNPixelsX()));
117 AliITSSimuParam* simpar = fDetType->GetSimuParam();
118 AliITSsegmentationSPD* seg = (AliITSsegmentationSPD*)GetSegmentationModel(0);
119 Double_t bias = simpar->GetSPDBiasVoltage();
5bfe44ce 120// cout << "Bias Voltage --> " << bias << endl; // dom
20eef074 121 simpar->SetDistanceOverVoltage(kmictocm*seg->Dy(),bias);
5bfe44ce 122// set kind of coupling ("old" or "new")
20eef074 123 char opt[20];
124 simpar->GetSPDCouplingOption(opt);
125 char *old = strstr(opt,"old");
126 if (old) {
127 fCoupling=2;
128 } else {
129 fCoupling=1;
130 } // end if
a0a6914c 131 SetLorentzDrift(simpar->GetSPDLorentzDrift());
132 if (fLorentz) SetTanLorAngle(simpar->GetSPDLorentzHoleWeight());
20eef074 133 //SetStrobeGeneration(kFALSE);
134 if (fStrobe) GenerateStrobePhase();
a4005be7 135}
136//______________________________________________________________________
137Bool_t AliITSsimulationSPD::SetTanLorAngle(Double_t WeightHole) {
20eef074 138 // This function set the Tangent of the Lorentz angle.
139 // A weighted average is used for electrons and holes
140 // Input: Double_t WeightHole: wheight for hole: it should be in the range [0,1]
141 // output: Bool_t : kTRUE in case of success
142 //
143 if(!fDetType) {
144 AliError("AliITSsimulationSPD::SetTanLorAngle: AliITSDetTypeSim* fDetType not set ");
145 return kFALSE;}
146 if(WeightHole<0) {
147 WeightHole=0.;
148 AliWarning("AliITSsimulationSPD::SetTanLorAngle: You have asked for negative Hole weight");
149 AliWarning("AliITSsimulationSPD::SetTanLorAngle: I'm going to use only electrons");
150 }
151 if(WeightHole>1) {
152 WeightHole=1.;
153 AliWarning("AliITSsimulationSPD::SetTanLorAngle: You have asked for weight > 1");
154 AliWarning("AliITSsimulationSPD::SetTanLorAngle: I'm going to use only holes");
155 }
156 Double_t WeightEle=1.-WeightHole;
157 AliITSSimuParam* simpar = fDetType->GetSimuParam();
a0a6914c 158 AliMagF* fld = (AliMagF*)TGeoGlobalMagField::Instance()->GetField();
159 if (!fld) AliFatal("The field is not initialized");
160 Double_t bz = fld->SolenoidField();
161 fTanLorAng = TMath::Tan(WeightHole*simpar->LorentzAngleHole(bz) +
162 WeightEle*simpar->LorentzAngleElectron(bz));
20eef074 163 return kTRUE;
c7a4dac0 164}
165//______________________________________________________________________
5bfe44ce 166AliITSsimulationSPD::~AliITSsimulationSPD(){
20eef074 167 // destructor
168 // Inputs:
169 // none.
170 // Outputs:
171 // none.
172 // Return:
173 // none.
174
175 if (fHis) {
176 fHis->Delete();
177 delete fHis;
178 } // end if fHis
b0f5e3fc 179}
c7a4dac0 180//______________________________________________________________________
5bfe44ce 181AliITSsimulationSPD::AliITSsimulationSPD(const
182 AliITSsimulationSPD
7537d03c 183 &s) : AliITSsimulation(s),
184fHis(s.fHis),
185fSPDname(s.fSPDname),
a4005be7 186fCoupling(s.fCoupling),
187fLorentz(s.fLorentz),
20eef074 188fTanLorAng(s.fTanLorAng),
189fStrobe(s.fStrobe),
190fStrobeLenght(s.fStrobeLenght),
191fStrobePhase(s.fStrobePhase){
192 // Copy Constructor
193 // Inputs:
194 // AliITSsimulationSPD &s The original class for which
195 // this class is a copy of
196 // Outputs:
197 // none.
198 // Return:
c7a4dac0 199
b0f5e3fc 200}
c7a4dac0 201//______________________________________________________________________
5bfe44ce 202AliITSsimulationSPD& AliITSsimulationSPD::operator=(const
20eef074 203 AliITSsimulationSPD &s){
204 // Assignment operator
205 // Inputs:
206 // AliITSsimulationSPD &s The original class for which
207 // this class is a copy of
208 // Outputs:
209 // none.
210 // Return:
211
212 if(&s == this) return *this;
213 this->fHis = s.fHis;
214 fCoupling = s.fCoupling;
215 fSPDname = s.fSPDname;
216 fLorentz = s.fLorentz;
217 fTanLorAng = s.fTanLorAng;
218 fStrobe = s.fStrobe;
219 fStrobeLenght = s.fStrobeLenght;
220 fStrobePhase = s.fStrobePhase;
221 return *this;
5bfe44ce 222}
85f5e9c2 223/*
3a97c582 224//______________________________________________________________________
5bfe44ce 225AliITSsimulation& AliITSsimulationSPD::operator=(const
20eef074 226 AliITSsimulation &s){
227 // Assignment operator
228 // Inputs:
229 // AliITSsimulationSPD &s The original class for which
230 // this class is a copy of
231 // Outputs:
232 // none.
233 // Return:
234
235 if(&s == this) return *this;
236 Error("AliITSsimulationSPD","Not allowed to make a = with "
237 "AliITSsimulationSPD","Using default creater instead");
238
239 return *this;
5bfe44ce 240}
85f5e9c2 241*/
5bfe44ce 242//______________________________________________________________________
243void AliITSsimulationSPD::InitSimulationModule(Int_t module, Int_t event){
20eef074 244 // This function creates maps to build the list of tracks for each
245 // summable digit. Inputs defined by base class.
246 // Inputs:
247 // Int_t module // Module number to be simulated
248 // Int_t event // Event number to be simulated
249 // Outputs:
250 // none
251 // Returns:
252 // none
253
254 AliDebug(1,Form("(module=%d,event=%d)",module,event));
255 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
256 AliITSSimuParam* simpar = fDetType->GetSimuParam();
257 AliITSsegmentationSPD* seg = (AliITSsegmentationSPD*)GetSegmentationModel(0);
258 SetModuleNumber(module);
259 SetEventNumber(event);
260 simpar->SetDistanceOverVoltage(kmictocm*seg->Dy(),simpar->GetSPDBiasVoltage(module));
261 ClearMap();
5bfe44ce 262}
263//_____________________________________________________________________
264void AliITSsimulationSPD::SDigitiseModule(AliITSmodule *mod,Int_t,
20eef074 265 Int_t event){
266 // This function begins the work of creating S-Digits. Inputs defined
267 // by base class.
268 // Inputs:
269 // AliITSmodule *mod // module
270 // Int_t // not used
271 // Int_t event // Event number
272 // Outputs:
273 // none
274 // Return:
275 // test // test returns kTRUE if the module contained hits
276 // // test returns kFALSE if it did not contain hits
277
278 AliDebug(1,Form("(mod=%p, ,event=%d)",mod,event));
279 if(!(mod->GetNhits())){
280 AliDebug(1,Form("In event %d module %d there are %d hits returning.",
5bfe44ce 281 event, mod->GetIndex(),mod->GetNhits()));
20eef074 282 return;// if module has no hits don't create Sdigits
283 } // end if
284 SetModuleNumber(mod->GetIndex());
285 if (fStrobe) if(event != GetEventNumber()) GenerateStrobePhase();
286 SetEventNumber(event);
287 InitSimulationModule( GetModuleNumber() , event );
288 // HitToSDigit(mod);
289 HitToSDigitFast(mod);
ad7f2bfa 290 if (fDetType->GetSimuParam()->GetSPDAddNoisyFlag()) AddNoisyPixels();
291 if (fDetType->GetSimuParam()->GetSPDRemoveDeadFlag()) RemoveDeadPixels();
292
590d15ee 293// cout << "After Remove in SDigitiseModule !!!!!" << endl; // dom
294// cout << "Module " << mod->GetIndex() << " Event " << event << endl; // dom
20eef074 295 WriteSDigits();
296 ClearMap();
5bfe44ce 297}
298//______________________________________________________________________
299void AliITSsimulationSPD::WriteSDigits(){
20eef074 300 // This function adds each S-Digit to pList
301 // Inputs:
302 // none.
303 // Outputs:
304 // none.
305 // Return:
306 // none
307 Int_t ix, nix, iz, niz;
308 static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
309
310 AliDebug(1,Form("Writing SDigits for module %d",GetModuleNumber()));
590d15ee 311// cout << "WriteSDigits for module " << GetModuleNumber() << endl; // dom
20eef074 312 GetMap()->GetMaxMapIndex(niz, nix);
313 for(iz=0; iz<niz; iz++)for(ix=0; ix<nix; ix++){
314 if(GetMap()->GetSignalOnly(iz,ix)>0.0){
590d15ee 315// cout << " Signal gt 0 iz ix " << iz << ix << " Module " << GetModuleNumber() << endl; // dom
20eef074 316 aliITS->AddSumDigit(*(GetMap()->GetpListItem(iz,ix)));
5bfe44ce 317 if(AliDebugLevel()>0) {
318 AliDebug(1,Form("%d, %d",iz,ix));
319 cout << *(GetMap()->GetpListItem(iz,ix)) << endl;
20eef074 320 } // end if GetDebug
321 } // end if GetMap()->GetSignalOnly(iz,ix)>0.0
322 } // end for iz,ix
323 return;
3a97c582 324}
325//______________________________________________________________________
326void AliITSsimulationSPD::FinishSDigitiseModule(){
20eef074 327 // This function calls SDigitsToDigits which creates Digits from SDigits
328 // Inputs:
329 // none
330 // Outputs:
331 // none
332 // Return
333 // none
334
335 AliDebug(1,"()");
590d15ee 336// cout << "FinishSDigitiseModule for module " << GetModuleNumber() << endl; // dom
20eef074 337 FrompListToDigits(); // Charge To Signal both adds noise and
338 ClearMap();
339 return;
5bfe44ce 340}
341//______________________________________________________________________
342void AliITSsimulationSPD::DigitiseModule(AliITSmodule *mod,Int_t,
20eef074 343 Int_t event){
344 // This function creates Digits straight from the hits and then adds
345 // electronic noise to the digits before adding them to pList
346 // Each of the input variables is passed along to HitToSDigit
347 // Inputs:
348 // AliITSmodule *mod module
349 // Int_t Dummy.
350 // Int_t Dummy
351 // Outputs:
352 // none.
353 // Return:
354 // none.
355
356 if (fStrobe) if(event != GetEventNumber()) GenerateStrobePhase();
1a429a6b 357 AliDebug(1,Form("(mod=%p,,0)",mod));
20eef074 358 // HitToSDigit(mod);
359 InitSimulationModule( mod->GetIndex(), event );
360 HitToSDigitFast(mod);
ad7f2bfa 361
362 if (fDetType->GetSimuParam()->GetSPDAddNoisyFlag()) AddNoisyPixels();
363 if (fDetType->GetSimuParam()->GetSPDRemoveDeadFlag()) RemoveDeadPixels();
590d15ee 364// cout << "After Remove in DigitiseModule in module " << mod->GetIndex() << endl; // dom
20eef074 365 FrompListToDigits();
366 ClearMap();
c7a4dac0 367}
368//______________________________________________________________________
5bfe44ce 369void AliITSsimulationSPD::HitToSDigit(AliITSmodule *mod){
20eef074 370 // Does the charge distributions using Gaussian diffusion charge charing.
371 // Inputs:
372 // AliITSmodule *mod Pointer to this module
373 // Output:
374 // none.
375 // Return:
376 // none.
377 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
378 const Double_t kBunchLenght = 25e-9; // LHC clock
379 TObjArray *hits = mod->GetHits();
380 Int_t nhits = hits->GetEntriesFast();
381 Int_t h,ix,iz,i;
382 Int_t idtrack;
383 Double_t x0=0.0,x1=0.0,y0=0.0,y1=0.0,z0=0.0,z1=0.0,de=0.0,ld=0.0;
384 Double_t x,y,z,t,tp,st,dt=0.2,el,sig,sigx,sigz,fda;
385 AliITSsegmentationSPD* seg = (AliITSsegmentationSPD*)GetSegmentationModel(0);
386 AliITSSimuParam *simpar = fDetType->GetSimuParam();
387 Double_t thick = 0.5*kmictocm*seg->Dy(); // Half Thickness
388 simpar->GetSPDSigmaDiffusionAsymmetry(fda); //
389
390 AliDebug(1,Form("(mod=%p) fCoupling=%d",mod,fCoupling));
391 if(nhits<=0) return;
392 for(h=0;h<nhits;h++){
393 if(AliDebugLevel()>0) {
5bfe44ce 394 AliDebug(1,Form("Hits, %d", h));
395 cout << *(mod->GetHit(h)) << endl;
20eef074 396 } // end if GetDebug
397 // Check if the hit is inside readout window
398 if (fStrobe)
399 if ((mod->GetHit(h)->GetTOF() < fStrobePhase) ||
400 (mod->GetHit(h)->GetTOF() > (fStrobePhase+(Double_t)fStrobeLenght*kBunchLenght))) continue;
401 if(!mod->LineSegmentL(h,x0,x1,y0,y1,z0,z1,de,idtrack)) continue;
402 st = TMath::Sqrt(x1*x1+y1*y1+z1*z1);
403 if(st>0.0){
404 st = (Double_t)((Int_t)(st/kmictocm)); // number of microns
405 if(st<=1.0) st = 1.0;
406 dt = 1.0/st;
407 for(t=0.0;t<1.0;t+=dt){ // Integrate over t
408 tp = t+0.5*dt;
409 x = x0+x1*tp;
410 y = y0+y1*tp;
411 z = z0+z1*tp;
412 if(!(seg->LocalToDet(x,z,ix,iz))) continue; // outside
413 //el = res->GeVToCharge((Double_t)(dt*de));
414 el = dt * de / simpar->GetGeVToCharge();
415 if(GetDebug(1)){
416 if(el<=0.0) cout<<"el="<<el<<" dt="<<dt
417 <<" de="<<de<<endl;
418 } // end if GetDebug
419 sig = simpar->SigmaDiffusion1D(TMath::Abs(thick + y));
420 sigx=sig;
421 sigz=sig*fda;
422 if (fLorentz) ld=(y+thick)*fTanLorAng;
423 SpreadChargeAsym(x,z,ix,iz,el,sigx,sigz,ld,idtrack,h);
424 } // end for t
425 } else { // st == 0.0 deposit it at this point
426 x = x0;
427 y = y0;
428 z = z0;
429 if(!(seg->LocalToDet(x,z,ix,iz))) continue; // outside
430 //el = res->GeVToCharge((Double_t)de);
431 el = de / simpar->GetGeVToCharge();
432 sig = simpar->SigmaDiffusion1D(TMath::Abs(thick + y));
433 sigx=sig;
434 sigz=sig*fda;
435 if (fLorentz) ld=(y+thick)*fTanLorAng;
436 SpreadChargeAsym(x,z,ix,iz,el,sigx,sigz,ld,idtrack,h);
437 } // end if st>0.0
438
439 } // Loop over all hits h
440
441 // Coupling
442 switch (fCoupling) {
443 default:
444 break;
445 case 1: //case 3:
446 for(i=0;i<GetMap()->GetEntries();i++)
447 if(GetMap()->GetpListItem(i)==0) continue;
448 else{
449 GetMap()->GetMapIndex(GetMap()->GetpListItem(i)->GetIndex(),iz,ix);
450 SetCoupling(iz,ix,idtrack,h);
451 } // end for i
452 break;
453 case 2: // case 4:
454 for(i=0;i<GetMap()->GetEntries();i++)
455 if(GetMap()->GetpListItem(i)==0) continue;
456 else{
457 GetMap()->GetMapIndex(GetMap()->GetpListItem(i)->GetIndex(),iz,ix);
458 SetCouplingOld(iz,ix,idtrack,h);
459 } // end for i
460 break;
461 } // end switch
462 if(GetDebug(2))Info("HitToSDigit","Finished fCoupling=%d",fCoupling);
c7a4dac0 463}
464//______________________________________________________________________
5bfe44ce 465void AliITSsimulationSPD::HitToSDigitFast(AliITSmodule *mod){
20eef074 466 // Does the charge distributions using Gaussian diffusion charge charing. // Inputs:
467 // AliITSmodule *mod Pointer to this module
468 // Output:
469 // none.
470 // Return:
471 // none.
472 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
473 const Int_t kn10=10;
474 const Double_t kti[kn10]={7.443716945e-3,2.166976971e-1,3.397047841e-1,
475 4.325316833e-1,4.869532643e-1,5.130467358e-1,
476 5.674683167e-1,6.602952159e-1,7.833023029e-1,
477 9.255628306e-1};
478 const Double_t kwi[kn10]={1.477621124e-1,1.346333597e-1,1.095431813e-1,
479 7.472567455e-2,3.333567215e-2,3.333567215e-2,
480 7.472567455e-2,1.095431813e-1,1.346333597e-1,
481 1.477621124e-1};
482 const Double_t kBunchLenght = 25e-9; // LHC clock
483 TObjArray *hits = mod->GetHits();
484 Int_t nhits = hits->GetEntriesFast();
485 Int_t h,ix,iz,i;
486 Int_t idtrack;
487 Double_t x0=0.0,x1=0.0,y0=0.0,y1=0.0,z0=0.0,z1=0.0,de=0.0,ld=0.0;
488 Double_t x,y,z,t,st,el,sig,sigx,sigz,fda;
489 AliITSsegmentationSPD* seg = (AliITSsegmentationSPD*)GetSegmentationModel(0);
490 AliITSSimuParam* simpar = fDetType->GetSimuParam();
491 Double_t thick = 0.5*kmictocm*seg->Dy(); // Half thickness
492 simpar->GetSPDSigmaDiffusionAsymmetry(fda);
5bfe44ce 493// cout << "Half Thickness " << thick << endl; // dom
494// cout << "Diffusion asymm " << fda << endl; // dom
495
20eef074 496 AliDebug(1,Form("(mod=%p) fCoupling=%d",mod,fCoupling));
497 if(nhits<=0) return;
498 for(h=0;h<nhits;h++){
499 if(AliDebugLevel()>0) {
500 AliDebug(1,Form("Hits, %d", h));
501 cout << *(mod->GetHit(h)) << endl;
502 } // end if GetDebug
503 // Check if the hit is inside readout window
504 if (fStrobe)
505 if ((mod->GetHit(h)->GetTOF() < fStrobePhase) ||
506 (mod->GetHit(h)->GetTOF() > (fStrobePhase+(Double_t)fStrobeLenght*kBunchLenght))) continue;
507 if(!mod->LineSegmentL(h,x0,x1,y0,y1,z0,z1,de,idtrack)) continue;
508 st = TMath::Sqrt(x1*x1+y1*y1+z1*z1);
509 if(st>0.0) for(i=0;i<kn10;i++){ // Integrate over t
510 t = kti[i];
511 x = x0+x1*t;
512 y = y0+y1*t;
513 z = z0+z1*t;
514 if(!(seg->LocalToDet(x,z,ix,iz))) continue; // outside
515 el = kwi[i]*de/simpar->GetGeVToCharge();
516 if(GetDebug(1)){
517 if(el<=0.0) cout<<"el="<<el<<" kwi["<<i<<"]="<<kwi[i]
518 <<" de="<<de<<endl;
519 } // end if GetDebug
520 sig = simpar->SigmaDiffusion1D(TMath::Abs(thick + y));
521 sigx=sig;
522 sigz=sig*fda;
523 if (fLorentz) ld=(y+thick)*fTanLorAng;
524 SpreadChargeAsym(x,z,ix,iz,el,sigx,sigz,ld,idtrack,h);
8e2f60b2 525// cout << "sigx sigz " << sigx << " " << sigz << endl; // dom
20eef074 526 } // end for i // End Integrate over t
527 else { // st == 0.0 deposit it at this point
528 x = x0;
529 y = y0;
530 z = z0;
531 if(!(seg->LocalToDet(x,z,ix,iz))) continue; // outside
532 el = de / simpar->GetGeVToCharge();
533 sig = simpar->SigmaDiffusion1D(TMath::Abs(thick + y));
534 sigx=sig;
535 sigz=sig*fda;
536 if (fLorentz) ld=(y+thick)*fTanLorAng;
537 SpreadChargeAsym(x,z,ix,iz,el,sigx,sigz,ld,idtrack,h);
538 } // end if st>0.0
539
540 } // Loop over all hits h
541
542 // Coupling
543 switch (fCoupling) {
544 default:
545 break;
546 case 1: // case 3:
547 for(i=0;i<GetMap()->GetEntries();i++)
548 if(GetMap()->GetpListItem(i)==0) continue;
549 else{
550 GetMap()->GetMapIndex(GetMap()->GetpListItem(i)->GetIndex(),iz,ix);
551 SetCoupling(iz,ix,idtrack,h);
552 } // end for i
553 break;
554 case 2: // case 4:
555 for(i=0;i<GetMap()->GetEntries();i++)
556 if(GetMap()->GetpListItem(i)==0) continue;
557 else{
558 GetMap()->GetMapIndex(GetMap()->GetpListItem(i)->GetIndex(),iz,ix);
559 SetCouplingOld(iz,ix,idtrack,h);
560 } // end for i
561 break;
562 } // end switch
563 if(GetDebug(2))Info("HitToSDigit","Finished fCoupling=%d",fCoupling);
21b825a4 564}
c7a4dac0 565//______________________________________________________________________
5bfe44ce 566void AliITSsimulationSPD::SpreadCharge(Double_t x0,Double_t z0,
20eef074 567 Int_t ix0,Int_t iz0,
a4005be7 568 Double_t el,Double_t sig,Double_t ld,
569 Int_t t,Int_t hi){
20eef074 570 // Spreads the charge over neighboring cells. Assume charge is distributed
571 // as charge(x,z) = (el/2*pi*sig*sig)*exp(-arg)
572 // arg=((x-x0)*(x-x0)/2*sig*sig)+((z-z0*z-z0)/2*sig*sig)
573 // if fLorentz=kTRUE, then x0=x0+ld (Lorentz drift taken into account)
574 // Defined this way, the integral over all x and z is el.
575 // Inputs:
576 // Double_t x0 x position of point where charge is liberated
577 // Double_t z0 z position of point where charge is liberated
578 // Int_t ix0 row of cell corresponding to point x0
579 // Int_t iz0 columb of cell corresponding to point z0
580 // Double_t el number of electrons liberated in this step
581 // Double_t sig Sigma difusion for this step (y0 dependent)
582 // Double_t ld lorentz drift in x for this step (y0 dependent)
583 // Int_t t track number
584 // Int_t ti hit track index number
585 // Int_t hi hit "hit" index number
586 // Outputs:
587 // none.
588 // Return:
589 // none.
590 const Int_t knx = 3,knz = 2;
591 const Double_t kRoot2 = 1.414213562; // Sqrt(2).
592 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
593 Int_t ix,iz,ixs,ixe,izs,ize;
594 Float_t x,z;
595 Double_t x1,x2,z1,z2,s,sp;
596 AliITSsegmentationSPD* seg = (AliITSsegmentationSPD*)GetSegmentationModel(0);
597
598
599 if(GetDebug(4)) Info("SpreadCharge","(x0=%e,z0=%e,ix0=%d,iz0=%d,el=%e,"
600 "sig=%e,t=%d,i=%d)",x0,z0,ix0,iz0,el,sig,t,hi);
601 if(sig<=0.0) { // if sig<=0 No diffusion to simulate.
602 GetMap()->AddSignal(iz0,ix0,t,hi,GetModuleNumber(),el);
603 if(GetDebug(2)){
604 cout << "sig<=0.0=" << sig << endl;
605 } // end if GetDebug
606 return;
607 } // end if
608 sp = 1.0/(sig*kRoot2);
609 if(GetDebug(2)){
610 cout << "sig=" << sig << " sp=" << sp << endl;
611 } // end if GetDebug
612 ixs = TMath::Max(-knx+ix0,0);
613 ixe = TMath::Min(knx+ix0,seg->Npx()-1);
614 izs = TMath::Max(-knz+iz0,0);
615 ize = TMath::Min(knz+iz0,seg->Npz()-1);
616 for(ix=ixs;ix<=ixe;ix++) for(iz=izs;iz<=ize;iz++){
617 seg->DetToLocal(ix,iz,x,z); // pixel center
618 x1 = x;
619 z1 = z;
620 x2 = x1 + 0.5*kmictocm*seg->Dpx(ix); // Upper
621 x1 -= 0.5*kmictocm*seg->Dpx(ix); // Lower
622 z2 = z1 + 0.5*kmictocm*seg->Dpz(iz); // Upper
623 z1 -= 0.5*kmictocm*seg->Dpz(iz); // Lower
624 x1 -= x0+ld; // Distance from where track traveled (taking into account the Lorentz drift)
625 x2 -= x0+ld; // Distance from where track traveled (taking into account the Lorentz drift)
626 z1 -= z0; // Distance from where track traveled
627 z2 -= z0; // Distance from where track traveled
628 s = 0.25; // Correction based on definision of Erfc
bb7e41dd 629 s *= AliMathBase::ErfcFast(sp*x1) - AliMathBase::ErfcFast(sp*x2);
20eef074 630 if(GetDebug(3)){
631 cout <<"el="<<el<<" ix0="<<ix0<<" ix="<<ix<<" x0="<<x<<
632 " iz0="<<iz0<<" iz="<<iz<<" z0="<<z<<
633 " sp*x1="<<sp*x1<<" sp*x2="<<sp*x2<<" s="<<s;
634 } // end if GetDebug
bb7e41dd 635 s *= AliMathBase::ErfcFast(sp*z1) - AliMathBase::ErfcFast(sp*z2);
20eef074 636 if(GetDebug(3)){
637 cout<<" sp*z1="<<sp*z1<<" sp*z2="<<sp*z2<<" s="<<s<< endl;
638 } // end if GetDebug
639 GetMap()->AddSignal(iz,ix,t,hi,GetModuleNumber(),s*el);
640 } // end for ix, iz
c7a4dac0 641}
642//______________________________________________________________________
5bfe44ce 643void AliITSsimulationSPD::SpreadChargeAsym(Double_t x0,Double_t z0,
20eef074 644 Int_t ix0,Int_t iz0,
645 Double_t el,Double_t sigx,Double_t sigz,
646 Double_t ld,Int_t t,Int_t hi){
647 // Spreads the charge over neighboring cells. Assume charge is distributed
648 // as charge(x,z) = (el/2*pi*sigx*sigz)*exp(-arg)
649 // arg=((x-x0)*(x-x0)/2*sigx*sigx)+((z-z0*z-z0)/2*sigz*sigz)
650 // if fLorentz=kTRUE, then x0=x0+ld (Lorentz drift taken into account)
651 // Defined this way, the integral over all x and z is el.
652 // Inputs:
653 // Double_t x0 x position of point where charge is liberated
654 // Double_t z0 z position of point where charge is liberated
655 // Int_t ix0 row of cell corresponding to point x0
656 // Int_t iz0 columb of cell corresponding to point z0
657 // Double_t el number of electrons liberated in this step
658 // Double_t sigx Sigma difusion along x for this step (y0 dependent)
659 // Double_t sigz Sigma difusion along z for this step (y0 dependent)
660 // Double_t ld lorentz drift in x for this stip (y0 dependent)
661 // Int_t t track number
662 // Int_t ti hit track index number
663 // Int_t hi hit "hit" index number
664 // Outputs:
665 // none.
666 // Return:
667 // none.
668 const Int_t knx = 3,knz = 2;
669 const Double_t kRoot2 = 1.414213562; // Sqrt(2).
670 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
671 Int_t ix,iz,ixs,ixe,izs,ize;
672 Float_t x,z;
673 Double_t x1,x2,z1,z2,s,spx,spz;
674 AliITSsegmentationSPD* seg = (AliITSsegmentationSPD*)GetSegmentationModel(0);
675
676
677 if(GetDebug(4)) Info("SpreadChargeAsym","(x0=%e,z0=%e,ix0=%d,iz0=%d,el=%e,"
a5a317a9 678 "sigx=%e, sigz=%e, t=%d,i=%d)",x0,z0,ix0,iz0,el,sigx,sigz,t,hi);
20eef074 679 if(sigx<=0.0 || sigz<=0.0) { // if sig<=0 No diffusion to simulate.
680 GetMap()->AddSignal(iz0,ix0,t,hi,GetModuleNumber(),el);
681 if(GetDebug(2)){
682 cout << "sigx<=0.0=" << sigx << endl;
683 cout << "sigz<=0.0=" << sigz << endl;
684 } // end if GetDebug
685 return;
686 } // end if
687 spx = 1.0/(sigx*kRoot2); spz = 1.0/(sigz*kRoot2);
688 if(GetDebug(2)){
689 cout << "sigx=" << sigx << " spx=" << spx << endl;
690 cout << "sigz=" << sigz << " spz=" << spz << endl;
691 } // end if GetDebug
692 ixs = TMath::Max(-knx+ix0,0);
693 ixe = TMath::Min(knx+ix0,seg->Npx()-1);
694 izs = TMath::Max(-knz+iz0,0);
695 ize = TMath::Min(knz+iz0,seg->Npz()-1);
696 for(ix=ixs;ix<=ixe;ix++) for(iz=izs;iz<=ize;iz++){
697 seg->DetToLocal(ix,iz,x,z); // pixel center
698 x1 = x;
699 z1 = z;
700 x2 = x1 + 0.5*kmictocm*seg->Dpx(ix); // Upper
701 x1 -= 0.5*kmictocm*seg->Dpx(ix); // Lower
702 z2 = z1 + 0.5*kmictocm*seg->Dpz(iz); // Upper
703 z1 -= 0.5*kmictocm*seg->Dpz(iz); // Lower
704 x1 -= x0+ld; // Distance from where track traveled (taking into account the Lorentz drift)
705 x2 -= x0+ld; // Distance from where track traveled (taking into account the Lorentz drift)
706 z1 -= z0; // Distance from where track traveled
707 z2 -= z0; // Distance from where track traveled
708 s = 0.25; // Correction based on definision of Erfc
bb7e41dd 709 s *= AliMathBase::ErfcFast(spx*x1) - AliMathBase::ErfcFast(spx*x2);
20eef074 710 if(GetDebug(3)){
711 cout <<"el="<<el<<" ix0="<<ix0<<" ix="<<ix<<" x0="<<x<<
712 " iz0="<<iz0<<" iz="<<iz<<" z0="<<z<<
713 " spx*x1="<<spx*x1<<" spx*x2="<<spx*x2<<" s="<<s;
714 } // end if GetDebug
bb7e41dd 715 s *= AliMathBase::ErfcFast(spz*z1) - AliMathBase::ErfcFast(spz*z2);
20eef074 716 if(GetDebug(3)){
717 cout<<" spz*z1="<<spz*z1<<" spz*z2="<<spz*z2<<" s="<<s<< endl;
718 } // end if GetDebug
719 GetMap()->AddSignal(iz,ix,t,hi,GetModuleNumber(),s*el);
720 } // end for ix, iz
c7a4dac0 721}
722//______________________________________________________________________
ad7f2bfa 723void AliITSsimulationSPD::RemoveDeadPixels(){
724 // Removes dead pixels on each module (ladder)
725 // This should be called before going from sdigits to digits (FrompListToDigits)
726 Int_t mod = GetModuleNumber();
727 AliITSCalibrationSPD* calObj = (AliITSCalibrationSPD*) fDetType->GetCalibrationModel(mod);
728
729 Int_t nrDead = calObj->GetNrBad();
730 for (Int_t i=0; i<nrDead; i++) {
731 GetMap()->DeleteHit(calObj->GetBadColAt(i), calObj->GetBadRowAt(i));
732 }
733}
734//______________________________________________________________________
735void AliITSsimulationSPD::AddNoisyPixels() {
736 // Adds noisy pixels on each module (ladder)
737 // This should be called before going from sdigits to digits (FrompListToDigits)
738 Int_t mod = GetModuleNumber();
739 AliITSCalibrationSPD* calObj = (AliITSCalibrationSPD*) fDetType->GetSPDNoisyModel(mod);
740
741 Int_t nrNoisy = calObj->GetNrBad();
742 for (Int_t i=0; i<nrNoisy; i++) {
743 // adding 10 times the threshold will for sure make this pixel fire...
744 GetMap()->AddNoise(calObj->GetBadColAt(i), calObj->GetBadRowAt(i), mod, 10*GetThreshold());
745 }
5bfe44ce 746}
747//______________________________________________________________________
590d15ee 748void AliITSsimulationSPD::FrompListToDigits(){
20eef074 749 // add noise and electronics, perform the zero suppression and add the
750 // digit to the list
751 // Inputs:
752 // none.
753 // Outputs:
754 // none.
755 // Return:
756 // none.
757 static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
758 Int_t j,ix,iz;
759 Double_t electronics;
760 Double_t sig;
761 const Int_t knmaxtrk=AliITSdigit::GetNTracks();
762 static AliITSdigitSPD dig;
763 AliITSSimuParam *simpar = fDetType->GetSimuParam();
764 if(GetDebug(1)) Info("FrompListToDigits","()");
765 for(iz=0; iz<GetNPixelsZ(); iz++) for(ix=0; ix<GetNPixelsX(); ix++){
5bfe44ce 766// NEW (for the moment plugged by hand, in the future possibly read from Data Base)
767// here parametrize the efficiency of the pixel along the row for the test columns (1,9,17,25)
768// if(iz==1 || iz == 9 || iz == 17 || iz == 25) {
769// Double_t eff,p1=0.,p2=0.;
770// Double_t x=ix;
771// switch (iz) {
772// case 1: p1=0.63460;p2=0.42438E-01;break;
773// case 9: p1=0.41090;p2=0.75914E-01;break;
774// case 17: p1=0.31883;p2=0.91502E-01;break;
775// case 25: p1=0.48828;p2=0.57975E-01;break;
776// } // end switch
777// eff=1.-p1*exp(-p2*x);
778// if (gRandom->Rndm() >= eff) continue;
779// } // end if
2ae37d58 780// END parametrize the efficiency
781//
20eef074 782 electronics = simpar->ApplySPDBaselineAndNoise();
783 UpdateMapNoise(ix,iz,electronics);
784 //
785 // Apply Threshold and write Digits.
786 sig = GetMap()->GetSignalOnly(iz,ix);
787 FillHistograms(ix,iz,sig+electronics);
788 if(GetDebug(3)){
789 cout<<sig<<"+"<<electronics<<">threshold("<<ix<<","<<iz
790 <<")="<<GetThreshold() <<endl;
791 } // end if GetDebug
ad7f2bfa 792 // if (sig+electronics <= GetThreshold()) continue;
793 if (GetMap()->GetSignal(iz,ix) <= GetThreshold()) continue;
20eef074 794 dig.SetCoord1(iz);
795 dig.SetCoord2(ix);
796 dig.SetSignal(1);
590d15ee 797
798// dig.SetSignalSPD((Int_t) GetMap()->GetSignal(iz,ix));
20eef074 799 Double_t aSignal = GetMap()->GetSignal(iz,ix);
800 if (TMath::Abs(aSignal)>2147483647.0) {
801 //PH 2147483647 is the max. integer
802 //PH This apparently is a problem which needs investigation
803 AliWarning(Form("Too big or too small signal value %f",aSignal));
804 aSignal = TMath::Sign((Double_t)2147483647,aSignal);
805 }
806 dig.SetSignalSPD((Int_t)aSignal);
807
808 for(j=0;j<knmaxtrk;j++){
809 if (j<GetMap()->GetNEntries()) {
810 dig.SetTrack(j,GetMap()->GetTrack(iz,ix,j));
811 dig.SetHit(j,GetMap()->GetHit(iz,ix,j));
812 }else { // Default values
813 dig.SetTrack(j,-3);
814 dig.SetHit(j,-1);
815 } // end if GetMap()
816 } // end for j
817 if(GetDebug(3)){
818 cout<<iz<<","<<ix<<","<<*(GetMap()->GetpListItem(iz,ix))<<endl;
819 } // end if GetDebug
820 aliITS->AddSimDigit(0,&dig);
ad7f2bfa 821 // simulate fo signal response for this pixel hit:
822 fDetType->ProcessSPDDigitForFastOr(fModule, dig.GetCoord1(), dig.GetCoord2());
20eef074 823 } // for ix/iz
c7a4dac0 824}
825//______________________________________________________________________
5bfe44ce 826void AliITSsimulationSPD::CreateHistograms(){
20eef074 827 // create 1D histograms for tests
828 // Inputs:
829 // none.
830 // Outputs:
831 // none.
832 // Return:
833 // none.
834
835 if(GetDebug(1)) Info("CreateHistograms","create histograms");
836
837 fHis = new TObjArray(GetNPixelsZ());
838 fSPDname="spd_";
839 for(Int_t i=0;i<GetNPixelsZ();i++) {
840 Char_t pixelz[4];
ce189d7c 841 snprintf(pixelz,3,"%d",i);
20eef074 842 fSPDname.Append(pixelz);
843 fHis->AddAt(new TH1F(fSPDname.Data(),"SPD maps",
844 GetNPixelsX(),0.,(Double_t)GetNPixelsX()),i);
845 } // end for i
c7a4dac0 846}
847//______________________________________________________________________
5bfe44ce 848void AliITSsimulationSPD::FillHistograms(Int_t ix,Int_t iz,Double_t v){
20eef074 849 // Fill the histogram
850 // Inputs:
851 // none.
852 // Outputs:
853 // none.
854 // Return:
855 // none.
856
857 if(!GetHistArray()) return; // Only fill if setup.
858 if(GetDebug(2)) Info("FillHistograms","fill histograms");
859 GetHistogram(iz)->Fill(ix,v);
c7a4dac0 860}
861//______________________________________________________________________
5bfe44ce 862void AliITSsimulationSPD::ResetHistograms(){
20eef074 863 // Reset histograms for this detector
864 // Inputs:
865 // none.
866 // Outputs:
867 // none.
868 // Return:
869 // none.
870
871 if(!GetHistArray()) return; // Only fill if setup.
872 if(GetDebug(2)) Info("FillHistograms","fill histograms");
873 for ( int i=0;i<GetNPixelsZ();i++ ) {
874 if (fHis->At(i)) ((TH1F*)fHis->At(i))->Reset();
875 } // end for i
21b825a4 876}
5bfe44ce 877
c7a4dac0 878//______________________________________________________________________
590d15ee 879void AliITSsimulationSPD::SetCoupling(Int_t col, Int_t row, Int_t ntrack,
5bfe44ce 880 Int_t idhit) {
20eef074 881 // Take into account the coupling between adiacent pixels.
882 // The parameters probcol and probrow are the probability of the
883 // signal in one pixel shared in the two adjacent pixels along
884 // the column and row direction, respectively.
885 // Note pList is goten via GetMap() and module is not need any more.
886 // Otherwise it is identical to that coded by Tiziano Virgili (BSN).
887 //Begin_Html
888 /*
889 <img src="picts/ITS/barimodel_3.gif">
890 </pre>
891 <br clear=left>
892 <font size=+2 color=red>
893 <a href="mailto:tiziano.virgili@cern.ch"></a>.
894 </font>
895 <pre>
896 */
897 //End_Html
898 // Inputs:
899 // Int_t col z cell index
900 // Int_t row x cell index
901 // Int_t ntrack track incex number
902 // Int_t idhit hit index number
903 // Outputs:
904 // none.
905 // Return:
906 // none.
907 Int_t j1,j2,flag=0;
908 Double_t pulse1,pulse2;
909 Double_t couplR=0.0,couplC=0.0;
910 Double_t xr=0.;
911
912 GetCouplings(couplC,couplR);
913 if(GetDebug(3)) Info("SetCoupling","(col=%d,row=%d,ntrack=%d,idhit=%d) "
914 "Calling SetCoupling couplC=%e couplR=%e",
915 col,row,ntrack,idhit,couplC,couplR);
916 j1 = col;
917 j2 = row;
918 pulse1 = GetMap()->GetSignalOnly(col,row);
919 pulse2 = pulse1;
920 for (Int_t isign=-1;isign<=1;isign+=2){// loop in col direction
921 do{
922 j1 += isign;
923 xr = gRandom->Rndm();
924 if ((j1<0) || (j1>GetNPixelsZ()-1) || (xr>couplC)){
925 j1 = col;
926 flag = 1;
927 }else{
928 UpdateMapSignal(row,j1,ntrack,idhit,pulse1);
929 // flag = 0;
930 flag = 1; // only first next!!
931 } // end if
932 } while(flag == 0);
933 // loop in row direction
934 do{
935 j2 += isign;
936 xr = gRandom->Rndm();
937 if ((j2<0) || (j2>GetNPixelsX()-1) || (xr>couplR)){
938 j2 = row;
939 flag = 1;
940 }else{
941 UpdateMapSignal(j2,col,ntrack,idhit,pulse2);
942 // flag = 0;
943 flag = 1; // only first next!!
944 } // end if
945 } while(flag == 0);
946 } // for isign
f8d9a5b8 947}
948//______________________________________________________________________
590d15ee 949void AliITSsimulationSPD::SetCouplingOld(Int_t col, Int_t row,
20eef074 950 Int_t ntrack,Int_t idhit) {
951 // Take into account the coupling between adiacent pixels.
952 // The parameters probcol and probrow are the fractions of the
953 // signal in one pixel shared in the two adjacent pixels along
954 // the column and row direction, respectively.
955 //Begin_Html
956 /*
957 <img src="picts/ITS/barimodel_3.gif">
958 </pre>
959 <br clear=left>
960 <font size=+2 color=red>
961 <a href="mailto:Rocco.Caliandro@ba.infn.it"></a>.
962 </font>
963 <pre>
964 */
965 //End_Html
966 // Inputs:
967 // Int_t col z cell index
968 // Int_t row x cell index
969 // Int_t ntrack track incex number
970 // Int_t idhit hit index number
971 // Int_t module module number
972 // Outputs:
973 // none.
974 // Return:
975 // none.
976 Int_t j1,j2,flag=0;
977 Double_t pulse1,pulse2;
978 Double_t couplR=0.0,couplC=0.0;
979
980 GetCouplings(couplC,couplR);
981
982 // Debugging ...
5bfe44ce 983// cout << "Threshold --> " << GetThreshold() << endl; // dom
8e2f60b2 984// cout << "Couplings --> " << couplC << " " << couplR << endl; // dom
5bfe44ce 985
20eef074 986 if(GetDebug(3)) Info("SetCouplingOld","(col=%d,row=%d,ntrack=%d,idhit=%d) "
987 "Calling SetCoupling couplC=%e couplR=%e",
988 col,row,ntrack,idhit,couplC,couplR);
989 for (Int_t isign=-1;isign<=1;isign+=2){// loop in col direction
990 pulse1 = GetMap()->GetSignalOnly(col,row);
991 pulse2 = pulse1;
992 j1 = col;
993 j2 = row;
994 do{
995 j1 += isign;
996 pulse1 *= couplC;
997 if ((j1<0)||(j1>GetNPixelsZ()-1)||(pulse1<GetThreshold())){
998 pulse1 = GetMap()->GetSignalOnly(col,row);
999 j1 = col;
1000 flag = 1;
1001 }else{
1002 UpdateMapSignal(row,j1,ntrack,idhit,pulse1);
1003 // flag = 0;
1004 flag = 1; // only first next !!
1005 } // end if
1006 } while(flag == 0);
1007 // loop in row direction
1008 do{
1009 j2 += isign;
1010 pulse2 *= couplR;
1011 if((j2<0)||(j2>(GetNPixelsX()-1))||(pulse2<GetThreshold())){
1012 pulse2 = GetMap()->GetSignalOnly(col,row);
1013 j2 = row;
1014 flag = 1;
1015 }else{
1016 UpdateMapSignal(j2,col,ntrack,idhit,pulse2);
1017 // flag = 0;
1018 flag = 1; // only first next!!
1019 } // end if
1020 } while(flag == 0);
1021 } // for isign
21b825a4 1022}
20eef074 1023//______________________________________________________________________
1024void AliITSsimulationSPD::GenerateStrobePhase()
1025{
1026 // Generate randomly the strobe
1027 // phase w.r.t to the LHC clock
1028 // Done once per event
1029 const Double_t kBunchLenght = 25e-9; // LHC clock
1030 fStrobePhase = ((Double_t)gRandom->Integer(fStrobeLenght))*kBunchLenght-
1031 (Double_t)fStrobeLenght*kBunchLenght+
1032 kBunchLenght/2;
1033}
1034