1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
20 #include <Riostream.h>
24 #include "AliITSdigitSPD.h"
25 #include "AliITShit.h"
26 #include "AliITSmodule.h"
27 #include "AliITSpList.h"
28 #include "AliITSCalibrationSPD.h"
29 #include "AliITSsegmentationSPD.h"
30 #include "AliITSsimulationSPD.h"
37 ClassImp(AliITSsimulationSPD)
38 ////////////////////////////////////////////////////////////////////////
40 // Modified by D. Elia, G.E. Bruno, H. Tydesjo
41 // Fast diffusion code by Bjorn S. Nilsen
43 // October 2007: GetCalibrationObjects() removed
46 // Written by Boris Batyunya
50 // AliITSsimulationSPD is to do the simulation of SPDs.
52 ////////////////////////////////////////////////////////////////////////
54 //______________________________________________________________________
55 AliITSsimulationSPD::AliITSsimulationSPD():
62 // Default constructor.
68 // A default constructed AliITSsimulationSPD class.
70 AliDebug(1,Form("Calling default constructor"));
73 //______________________________________________________________________
74 AliITSsimulationSPD::AliITSsimulationSPD(AliITSDetTypeSim *dettyp):
75 AliITSsimulation(dettyp),
81 // standard constructor
83 // AliITSsegmentation *seg A pointer to the segmentation class
84 // to be used for this simulation
85 // AliITSCalibration *resp A pointer to the responce class to
86 // be used for this simulation
90 // A default constructed AliITSsimulationSPD class.
92 AliDebug(1,Form("Calling standard constructor "));
93 // AliITSCalibrationSPD* res = (AliITSCalibrationSPD*)GetCalibrationModel(fDetType->GetITSgeom()->GetStartSPD());
94 // res->SetTemperature(0.0);
95 // res->SetDistanceOverVoltage(0.0);
98 //______________________________________________________________________
99 void AliITSsimulationSPD::Init(){
107 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
111 SetMap(new AliITSpList(GetNPixelsZ(),GetNPixelsX()));
112 AliITSCalibrationSPD* res = (AliITSCalibrationSPD*)GetCalibrationModel(fDetType->GetITSgeom()->GetStartSPD());
113 AliITSsegmentationSPD* seg = (AliITSsegmentationSPD*)GetSegmentationModel(0);
114 Double_t bias = res->GetBiasVoltage();
115 // cout << "Bias Voltage --> " << bias << endl; // dom
116 res->SetDistanceOverVoltage(kmictocm*seg->Dy(),bias);
117 // set kind of coupling ("old" or "new")
119 res->GetCouplingOption(opt);
120 char *old = strstr(opt,"old");
126 //SetLorentzDrift(kTRUE);
127 if (fLorentz) SetTanLorAngle();
129 //______________________________________________________________________
130 Bool_t AliITSsimulationSPD::SetTanLorAngle(Double_t WeightHole) {
131 // This function set the Tangent of the Lorentz angle.
132 // A weighted average is used for electrons and holes
133 // Input: Double_t WeightHole: wheight for hole: it should be in the range [0,1]
134 // output: Bool_t : kTRUE in case of success
137 AliError("AliITSsimulationSPD::SetTanLorAngle: AliITSDetTypeSim* fDetType not set ");
141 AliWarning("AliITSsimulationSPD::SetTanLorAngle: You have asked for negative Hole weight");
142 AliWarning("AliITSsimulationSPD::SetTanLorAngle: I'm going to use only electrons");
146 AliWarning("AliITSsimulationSPD::SetTanLorAngle: You have asked for weight > 1");
147 AliWarning("AliITSsimulationSPD::SetTanLorAngle: I'm going to use only holes");
149 Double_t WeightEle=1.-WeightHole;
150 AliITSCalibrationSPD* res = (AliITSCalibrationSPD*)GetCalibrationModel(fDetType->GetITSgeom()->GetStartSPD());
151 AliMagF *mf = gAlice->Field();
152 Float_t pos[3]={0.,0.,0.};
153 Float_t B[3]={0.,0.,0.};
155 fTanLorAng = TMath::Tan(WeightHole*res->LorentzAngleHole(B[2]) +
156 WeightEle*res->LorentzAngleElectron(B[2]));
157 fTanLorAng*=-1.; // this only for the old geometry
158 // comment the upper line for the new geometry
161 //______________________________________________________________________
162 AliITSsimulationSPD::~AliITSsimulationSPD(){
176 //______________________________________________________________________
177 AliITSsimulationSPD::AliITSsimulationSPD(const
179 &s) : AliITSsimulation(s),
181 fSPDname(s.fSPDname),
182 fCoupling(s.fCoupling),
183 fLorentz(s.fLorentz),
184 fTanLorAng(s.fTanLorAng){
187 // AliITSsimulationSPD &s The original class for which
188 // this class is a copy of
194 //______________________________________________________________________
195 AliITSsimulationSPD& AliITSsimulationSPD::operator=(const
196 AliITSsimulationSPD &s){
197 // Assignment operator
199 // AliITSsimulationSPD &s The original class for which
200 // this class is a copy of
205 if(&s == this) return *this;
207 fCoupling = s.fCoupling;
208 fSPDname = s.fSPDname;
209 fLorentz = s.fLorentz;
210 fTanLorAng = s.fTanLorAng;
214 //______________________________________________________________________
215 AliITSsimulation& AliITSsimulationSPD::operator=(const
216 AliITSsimulation &s){
217 // Assignment operator
219 // AliITSsimulationSPD &s The original class for which
220 // this class is a copy of
225 if(&s == this) return *this;
226 Error("AliITSsimulationSPD","Not allowed to make a = with "
227 "AliITSsimulationSPD","Using default creater instead");
232 //______________________________________________________________________
233 void AliITSsimulationSPD::InitSimulationModule(Int_t module, Int_t event){
234 // This function creates maps to build the list of tracks for each
235 // summable digit. Inputs defined by base class.
237 // Int_t module // Module number to be simulated
238 // Int_t event // Event number to be simulated
244 AliDebug(1,Form("(module=%d,event=%d)",module,event));
245 SetModuleNumber(module);
246 SetEventNumber(event);
249 //_____________________________________________________________________
250 void AliITSsimulationSPD::SDigitiseModule(AliITSmodule *mod,Int_t,
252 // This function begins the work of creating S-Digits. Inputs defined
255 // AliITSmodule *mod // module
257 // Int_t event // Event number
261 // test // test returns kTRUE if the module contained hits
262 // // test returns kFALSE if it did not contain hits
264 AliDebug(1,Form("(mod=%p, ,event=%d)",mod,event));
265 if(!(mod->GetNhits())){
266 AliDebug(1,Form("In event %d module %d there are %d hits returning.",
267 event, mod->GetIndex(),mod->GetNhits()));
268 return;// if module has no hits don't create Sdigits
270 SetModuleNumber(mod->GetIndex());
271 SetEventNumber(event);
273 HitToSDigitFast(mod);
274 RemoveDeadPixels(mod);
275 // cout << "After Remove in SDigitiseModule !!!!!" << endl; // dom
276 // cout << "Module " << mod->GetIndex() << " Event " << event << endl; // dom
280 //______________________________________________________________________
281 void AliITSsimulationSPD::WriteSDigits(){
282 // This function adds each S-Digit to pList
289 Int_t ix, nix, iz, niz;
290 static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
292 AliDebug(1,Form("Writing SDigits for module %d",GetModuleNumber()));
293 // cout << "WriteSDigits for module " << GetModuleNumber() << endl; // dom
294 GetMap()->GetMaxMapIndex(niz, nix);
295 for(iz=0; iz<niz; iz++)for(ix=0; ix<nix; ix++){
296 if(GetMap()->GetSignalOnly(iz,ix)>0.0){
297 // cout << " Signal gt 0 iz ix " << iz << ix << " Module " << GetModuleNumber() << endl; // dom
298 aliITS->AddSumDigit(*(GetMap()->GetpListItem(iz,ix)));
299 if(AliDebugLevel()>0) {
300 AliDebug(1,Form("%d, %d",iz,ix));
301 cout << *(GetMap()->GetpListItem(iz,ix)) << endl;
303 } // end if GetMap()->GetSignalOnly(iz,ix)>0.0
307 //______________________________________________________________________
308 void AliITSsimulationSPD::FinishSDigitiseModule(){
309 // This function calls SDigitsToDigits which creates Digits from SDigits
318 // cout << "FinishSDigitiseModule for module " << GetModuleNumber() << endl; // dom
319 FrompListToDigits(); // Charge To Signal both adds noise and
323 //______________________________________________________________________
324 void AliITSsimulationSPD::DigitiseModule(AliITSmodule *mod,Int_t,
326 // This function creates Digits straight from the hits and then adds
327 // electronic noise to the digits before adding them to pList
328 // Each of the input variables is passed along to HitToSDigit
330 // AliITSmodule *mod module
338 AliDebug(1,Form("(mod=%p,,)",mod));
340 HitToSDigitFast(mod);
341 RemoveDeadPixels(mod);
342 // cout << "After Remove in DigitiseModule in module " << mod->GetIndex() << endl; // dom
346 //______________________________________________________________________
347 void AliITSsimulationSPD::HitToSDigit(AliITSmodule *mod){
348 // Does the charge distributions using Gaussian diffusion charge charing.
350 // AliITSmodule *mod Pointer to this module
355 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
356 TObjArray *hits = mod->GetHits();
357 Int_t nhits = hits->GetEntriesFast();
360 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;
361 Double_t x,y,z,t,tp,st,dt=0.2,el,sig,sigx,sigz,fda;
362 AliITSsegmentationSPD* seg = (AliITSsegmentationSPD*)GetSegmentationModel(0);
363 AliITSCalibrationSPD* res = (AliITSCalibrationSPD*)GetCalibrationModel(fDetType->GetITSgeom()->GetStartSPD());
364 Double_t thick = 0.5*kmictocm*seg->Dy(); // Half Thickness
365 res->GetSigmaDiffusionAsymmetry(fda);
367 AliDebug(1,Form("(mod=%p) fCoupling=%d",mod,fCoupling));
369 for(h=0;h<nhits;h++){
370 if(AliDebugLevel()>0) {
371 AliDebug(1,Form("Hits, %d", h));
372 cout << *(mod->GetHit(h)) << endl;
374 if(!mod->LineSegmentL(h,x0,x1,y0,y1,z0,z1,de,idtrack)) continue;
375 st = TMath::Sqrt(x1*x1+y1*y1+z1*z1);
377 st = (Double_t)((Int_t)(st/kmictocm)); // number of microns
378 if(st<=1.0) st = 1.0;
380 for(t=0.0;t<1.0;t+=dt){ // Integrate over t
385 if(!(seg->LocalToDet(x,z,ix,iz))) continue; // outside
386 el = res->GeVToCharge((Double_t)(dt*de));
388 if(el<=0.0) cout<<"el="<<el<<" dt="<<dt
391 sig = res->SigmaDiffusion1D(TMath::Abs(thick + y));
394 if (fLorentz) ld=(y+thick)*fTanLorAng;
395 SpreadChargeAsym(x,z,ix,iz,el,sigx,sigz,ld,idtrack,h);
397 } else { // st == 0.0 deposit it at this point
401 if(!(seg->LocalToDet(x,z,ix,iz))) continue; // outside
402 el = res->GeVToCharge((Double_t)de);
403 sig = res->SigmaDiffusion1D(TMath::Abs(thick + y));
406 if (fLorentz) ld=(y+thick)*fTanLorAng;
407 SpreadChargeAsym(x,z,ix,iz,el,sigx,sigz,ld,idtrack,h);
410 } // Loop over all hits h
417 for(i=0;i<GetMap()->GetEntries();i++)
418 if(GetMap()->GetpListItem(i)==0) continue;
420 GetMap()->GetMapIndex(GetMap()->GetpListItem(i)->GetIndex(),iz,ix);
421 SetCoupling(iz,ix,idtrack,h);
425 for(i=0;i<GetMap()->GetEntries();i++)
426 if(GetMap()->GetpListItem(i)==0) continue;
428 GetMap()->GetMapIndex(GetMap()->GetpListItem(i)->GetIndex(),iz,ix);
429 SetCouplingOld(iz,ix,idtrack,h);
433 if(GetDebug(2))Info("HitToSDigit","Finished fCoupling=%d",fCoupling);
435 //______________________________________________________________________
436 void AliITSsimulationSPD::HitToSDigitFast(AliITSmodule *mod){
437 // Does the charge distributions using Gaussian diffusion charge charing. // Inputs:
438 // AliITSmodule *mod Pointer to this module
443 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
445 const Double_t kti[kn10]={7.443716945e-3,2.166976971e-1,3.397047841e-1,
446 4.325316833e-1,4.869532643e-1,5.130467358e-1,
447 5.674683167e-1,6.602952159e-1,7.833023029e-1,
449 const Double_t kwi[kn10]={1.477621124e-1,1.346333597e-1,1.095431813e-1,
450 7.472567455e-2,3.333567215e-2,3.333567215e-2,
451 7.472567455e-2,1.095431813e-1,1.346333597e-1,
453 TObjArray *hits = mod->GetHits();
454 Int_t nhits = hits->GetEntriesFast();
457 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;
458 Double_t x,y,z,t,st,el,sig,sigx,sigz,fda;
459 AliITSsegmentationSPD* seg = (AliITSsegmentationSPD*)GetSegmentationModel(0);
460 AliITSCalibrationSPD* res = (AliITSCalibrationSPD*)GetCalibrationModel(fDetType->GetITSgeom()->GetStartSPD());
461 Double_t thick = 0.5*kmictocm*seg->Dy(); // Half thickness
462 res->GetSigmaDiffusionAsymmetry(fda);
463 // cout << "Half Thickness " << thick << endl; // dom
464 // cout << "Diffusion asymm " << fda << endl; // dom
466 AliDebug(1,Form("(mod=%p) fCoupling=%d",mod,fCoupling));
468 for(h=0;h<nhits;h++){
469 if(AliDebugLevel()>0) {
470 AliDebug(1,Form("Hits, %d", h));
471 cout << *(mod->GetHit(h)) << endl;
473 if(!mod->LineSegmentL(h,x0,x1,y0,y1,z0,z1,de,idtrack)) continue;
474 st = TMath::Sqrt(x1*x1+y1*y1+z1*z1);
475 if(st>0.0) for(i=0;i<kn10;i++){ // Integrate over t
480 if(!(seg->LocalToDet(x,z,ix,iz))) continue; // outside
481 // el = res->GeVToCharge((Double_t)(dt*de));
482 // el = 1./kn10*res->GeVToCharge((Double_t)de);
483 el = kwi[i]*res->GeVToCharge((Double_t)de);
485 if(el<=0.0) cout<<"el="<<el<<" kwi["<<i<<"]="<<kwi[i]
488 sig = res->SigmaDiffusion1D(TMath::Abs(thick + y));
491 if (fLorentz) ld=(y+thick)*fTanLorAng;
492 SpreadChargeAsym(x,z,ix,iz,el,sigx,sigz,ld,idtrack,h);
493 // cout << "sigx sigz " << sigx << " " << sigz << endl; // dom
494 } // end for i // End Integrate over t
495 else { // st == 0.0 deposit it at this point
499 if(!(seg->LocalToDet(x,z,ix,iz))) continue; // outside
500 el = res->GeVToCharge((Double_t)de);
501 sig = res->SigmaDiffusion1D(TMath::Abs(thick + y));
504 if (fLorentz) ld=(y+thick)*fTanLorAng;
505 SpreadChargeAsym(x,z,ix,iz,el,sigx,sigz,ld,idtrack,h);
508 } // Loop over all hits h
515 for(i=0;i<GetMap()->GetEntries();i++)
516 if(GetMap()->GetpListItem(i)==0) continue;
518 GetMap()->GetMapIndex(GetMap()->GetpListItem(i)->GetIndex(),iz,ix);
519 SetCoupling(iz,ix,idtrack,h);
523 for(i=0;i<GetMap()->GetEntries();i++)
524 if(GetMap()->GetpListItem(i)==0) continue;
526 GetMap()->GetMapIndex(GetMap()->GetpListItem(i)->GetIndex(),iz,ix);
527 SetCouplingOld(iz,ix,idtrack,h);
531 if(GetDebug(2))Info("HitToSDigit","Finished fCoupling=%d",fCoupling);
533 //______________________________________________________________________
534 void AliITSsimulationSPD::SpreadCharge(Double_t x0,Double_t z0,
536 Double_t el,Double_t sig,Double_t ld,
538 // Spreads the charge over neighboring cells. Assume charge is distributed
539 // as charge(x,z) = (el/2*pi*sig*sig)*exp(-arg)
540 // arg=((x-x0)*(x-x0)/2*sig*sig)+((z-z0*z-z0)/2*sig*sig)
541 // if fLorentz=kTRUE, then x0=x0+ld (Lorentz drift taken into account)
542 // Defined this way, the integral over all x and z is el.
544 // Double_t x0 x position of point where charge is liberated
545 // Double_t z0 z position of point where charge is liberated
546 // Int_t ix0 row of cell corresponding to point x0
547 // Int_t iz0 columb of cell corresponding to point z0
548 // Double_t el number of electrons liberated in this step
549 // Double_t sig Sigma difusion for this step (y0 dependent)
550 // Double_t ld lorentz drift in x for this step (y0 dependent)
551 // Int_t t track number
552 // Int_t ti hit track index number
553 // Int_t hi hit "hit" index number
558 const Int_t knx = 3,knz = 2;
559 const Double_t kRoot2 = 1.414213562; // Sqrt(2).
560 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
561 Int_t ix,iz,ixs,ixe,izs,ize;
563 Double_t x1,x2,z1,z2,s,sp;
564 AliITSsegmentationSPD* seg = (AliITSsegmentationSPD*)GetSegmentationModel(0);
567 if(GetDebug(4)) Info("SpreadCharge","(x0=%e,z0=%e,ix0=%d,iz0=%d,el=%e,"
568 "sig=%e,t=%d,i=%d)",x0,z0,ix0,iz0,el,sig,t,hi);
569 if(sig<=0.0) { // if sig<=0 No diffusion to simulate.
570 GetMap()->AddSignal(iz0,ix0,t,hi,GetModuleNumber(),el);
572 cout << "sig<=0.0=" << sig << endl;
576 sp = 1.0/(sig*kRoot2);
578 cout << "sig=" << sig << " sp=" << sp << endl;
580 ixs = TMath::Max(-knx+ix0,0);
581 ixe = TMath::Min(knx+ix0,seg->Npx()-1);
582 izs = TMath::Max(-knz+iz0,0);
583 ize = TMath::Min(knz+iz0,seg->Npz()-1);
584 for(ix=ixs;ix<=ixe;ix++) for(iz=izs;iz<=ize;iz++){
585 seg->DetToLocal(ix,iz,x,z); // pixel center
588 x2 = x1 + 0.5*kmictocm*seg->Dpx(ix); // Upper
589 x1 -= 0.5*kmictocm*seg->Dpx(ix); // Lower
590 z2 = z1 + 0.5*kmictocm*seg->Dpz(iz); // Upper
591 z1 -= 0.5*kmictocm*seg->Dpz(iz); // Lower
592 x1 -= x0+ld; // Distance from where track traveled (taking into account the Lorentz drift)
593 x2 -= x0+ld; // Distance from where track traveled (taking into account the Lorentz drift)
594 z1 -= z0; // Distance from where track traveled
595 z2 -= z0; // Distance from where track traveled
596 s = 0.25; // Correction based on definision of Erfc
597 s *= TMath::Erfc(sp*x1) - TMath::Erfc(sp*x2);
599 cout <<"el="<<el<<" ix0="<<ix0<<" ix="<<ix<<" x0="<<x<<
600 " iz0="<<iz0<<" iz="<<iz<<" z0="<<z<<
601 " sp*x1="<<sp*x1<<" sp*x2="<<sp*x2<<" s="<<s;
603 s *= TMath::Erfc(sp*z1) - TMath::Erfc(sp*z2);
605 cout<<" sp*z1="<<sp*z1<<" sp*z2="<<sp*z2<<" s="<<s<< endl;
607 GetMap()->AddSignal(iz,ix,t,hi,GetModuleNumber(),s*el);
610 //______________________________________________________________________
611 void AliITSsimulationSPD::SpreadChargeAsym(Double_t x0,Double_t z0,
613 Double_t el,Double_t sigx,Double_t sigz,
614 Double_t ld,Int_t t,Int_t hi){
615 // Spreads the charge over neighboring cells. Assume charge is distributed
616 // as charge(x,z) = (el/2*pi*sigx*sigz)*exp(-arg)
617 // arg=((x-x0)*(x-x0)/2*sigx*sigx)+((z-z0*z-z0)/2*sigz*sigz)
618 // if fLorentz=kTRUE, then x0=x0+ld (Lorentz drift taken into account)
619 // Defined this way, the integral over all x and z is el.
621 // Double_t x0 x position of point where charge is liberated
622 // Double_t z0 z position of point where charge is liberated
623 // Int_t ix0 row of cell corresponding to point x0
624 // Int_t iz0 columb of cell corresponding to point z0
625 // Double_t el number of electrons liberated in this step
626 // Double_t sigx Sigma difusion along x for this step (y0 dependent)
627 // Double_t sigz Sigma difusion along z for this step (y0 dependent)
628 // Double_t ld lorentz drift in x for this stip (y0 dependent)
629 // Int_t t track number
630 // Int_t ti hit track index number
631 // Int_t hi hit "hit" index number
636 const Int_t knx = 3,knz = 2;
637 const Double_t kRoot2 = 1.414213562; // Sqrt(2).
638 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
639 Int_t ix,iz,ixs,ixe,izs,ize;
641 Double_t x1,x2,z1,z2,s,spx,spz;
642 AliITSsegmentationSPD* seg = (AliITSsegmentationSPD*)GetSegmentationModel(0);
645 if(GetDebug(4)) Info("SpreadChargeAsym","(x0=%e,z0=%e,ix0=%d,iz0=%d,el=%e,"
646 "sig=%e,t=%d,i=%d)",x0,z0,ix0,iz0,el,sigx,sigz,t,hi);
647 if(sigx<=0.0 || sigz<=0.0) { // if sig<=0 No diffusion to simulate.
648 GetMap()->AddSignal(iz0,ix0,t,hi,GetModuleNumber(),el);
650 cout << "sigx<=0.0=" << sigx << endl;
651 cout << "sigz<=0.0=" << sigz << endl;
655 spx = 1.0/(sigx*kRoot2); spz = 1.0/(sigz*kRoot2);
657 cout << "sigx=" << sigx << " spx=" << spx << endl;
658 cout << "sigz=" << sigz << " spz=" << spz << endl;
660 ixs = TMath::Max(-knx+ix0,0);
661 ixe = TMath::Min(knx+ix0,seg->Npx()-1);
662 izs = TMath::Max(-knz+iz0,0);
663 ize = TMath::Min(knz+iz0,seg->Npz()-1);
664 for(ix=ixs;ix<=ixe;ix++) for(iz=izs;iz<=ize;iz++){
665 seg->DetToLocal(ix,iz,x,z); // pixel center
668 x2 = x1 + 0.5*kmictocm*seg->Dpx(ix); // Upper
669 x1 -= 0.5*kmictocm*seg->Dpx(ix); // Lower
670 z2 = z1 + 0.5*kmictocm*seg->Dpz(iz); // Upper
671 z1 -= 0.5*kmictocm*seg->Dpz(iz); // Lower
672 x1 -= x0+ld; // Distance from where track traveled (taking into account the Lorentz drift)
673 x2 -= x0+ld; // Distance from where track traveled (taking into account the Lorentz drift)
674 z1 -= z0; // Distance from where track traveled
675 z2 -= z0; // Distance from where track traveled
676 s = 0.25; // Correction based on definision of Erfc
677 s *= TMath::Erfc(spx*x1) - TMath::Erfc(spx*x2);
679 cout <<"el="<<el<<" ix0="<<ix0<<" ix="<<ix<<" x0="<<x<<
680 " iz0="<<iz0<<" iz="<<iz<<" z0="<<z<<
681 " spx*x1="<<spx*x1<<" spx*x2="<<spx*x2<<" s="<<s;
683 s *= TMath::Erfc(spz*z1) - TMath::Erfc(spz*z2);
685 cout<<" spz*z1="<<spz*z1<<" spz*z2="<<spz*z2<<" s="<<s<< endl;
687 GetMap()->AddSignal(iz,ix,t,hi,GetModuleNumber(),s*el);
690 //______________________________________________________________________
691 void AliITSsimulationSPD::RemoveDeadPixels(AliITSmodule *mod){
692 // Removes dead pixels on each module (ladder)
694 // Module Index (0,239)
700 Int_t moduleNr = mod->GetIndex();
701 AliITSCalibrationSPD* calObj = (AliITSCalibrationSPD*) GetCalibrationModel(moduleNr);
703 Int_t nrDead = calObj->GetNrBad();
704 // cout << "Module --> " << moduleNr << endl; // dom
705 // cout << "nr of dead " << nrDead << endl; // dom
706 for (Int_t i=0; i<nrDead; i++) {
707 GetMap()->DeleteHit(calObj->GetBadColAt(i),calObj->GetBadRowAt(i));
708 // cout << "dead index " << i << endl; // dom
709 // cout << "col row --> " << calObj->GetDeadColAt(i) << " " << calObj->GetDeadRowAt(i) << endl; // dom
712 //______________________________________________________________________
713 void AliITSsimulationSPD::FrompListToDigits(){
714 // add noise and electronics, perform the zero suppression and add the
722 static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
724 Double_t electronics;
726 const Int_t knmaxtrk=AliITSdigit::GetNTracks();
727 static AliITSdigitSPD dig;
728 AliITSCalibrationSPD* res = (AliITSCalibrationSPD*)GetCalibrationModel(fDetType->GetITSgeom()->GetStartSPD());
729 if(GetDebug(1)) Info("FrompListToDigits","()");
730 for(iz=0; iz<GetNPixelsZ(); iz++) for(ix=0; ix<GetNPixelsX(); ix++){
731 // NEW (for the moment plugged by hand, in the future possibly read from Data Base)
732 // here parametrize the efficiency of the pixel along the row for the test columns (1,9,17,25)
733 // if(iz==1 || iz == 9 || iz == 17 || iz == 25) {
734 // Double_t eff,p1=0.,p2=0.;
737 // case 1: p1=0.63460;p2=0.42438E-01;break;
738 // case 9: p1=0.41090;p2=0.75914E-01;break;
739 // case 17: p1=0.31883;p2=0.91502E-01;break;
740 // case 25: p1=0.48828;p2=0.57975E-01;break;
742 // eff=1.-p1*exp(-p2*x);
743 // if (gRandom->Rndm() >= eff) continue;
745 // END parametrize the efficiency
747 electronics = res->ApplyBaselineAndNoise();
748 UpdateMapNoise(ix,iz,electronics);
750 // Apply Threshold and write Digits.
751 sig = GetMap()->GetSignalOnly(iz,ix);
752 FillHistograms(ix,iz,sig+electronics);
754 cout<<sig<<"+"<<electronics<<">threshold("<<ix<<","<<iz
755 <<")="<<GetThreshold() <<endl;
757 if (sig+electronics <= GetThreshold()) continue;
762 // dig.SetSignalSPD((Int_t) GetMap()->GetSignal(iz,ix));
763 Double_t aSignal = GetMap()->GetSignal(iz,ix);
764 if (TMath::Abs(aSignal)>2147483647.0) {
765 //PH 2147483647 is the max. integer
766 //PH This apparently is a problem which needs investigation
767 AliWarning(Form("Too big or too small signal value %f",aSignal));
768 aSignal = TMath::Sign((Double_t)2147483647,aSignal);
770 dig.SetSignalSPD((Int_t)aSignal);
772 for(j=0;j<knmaxtrk;j++){
773 if (j<GetMap()->GetNEntries()) {
774 dig.SetTrack(j,GetMap()->GetTrack(iz,ix,j));
775 dig.SetHit(j,GetMap()->GetHit(iz,ix,j));
776 }else { // Default values
782 cout<<iz<<","<<ix<<","<<*(GetMap()->GetpListItem(iz,ix))<<endl;
784 aliITS->AddSimDigit(0,&dig);
787 //______________________________________________________________________
788 void AliITSsimulationSPD::CreateHistograms(){
789 // create 1D histograms for tests
797 if(GetDebug(1)) Info("CreateHistograms","create histograms");
799 fHis = new TObjArray(GetNPixelsZ());
801 for(Int_t i=0;i<GetNPixelsZ();i++) {
803 sprintf(pixelz,"%d",i);
804 fSPDname.Append(pixelz);
805 fHis->AddAt(new TH1F(fSPDname.Data(),"SPD maps",
806 GetNPixelsX(),0.,(Double_t)GetNPixelsX()),i);
809 //______________________________________________________________________
810 void AliITSsimulationSPD::FillHistograms(Int_t ix,Int_t iz,Double_t v){
811 // Fill the histogram
819 if(!GetHistArray()) return; // Only fill if setup.
820 if(GetDebug(2)) Info("FillHistograms","fill histograms");
821 GetHistogram(iz)->Fill(ix,v);
823 //______________________________________________________________________
824 void AliITSsimulationSPD::ResetHistograms(){
825 // Reset histograms for this detector
833 if(!GetHistArray()) return; // Only fill if setup.
834 if(GetDebug(2)) Info("FillHistograms","fill histograms");
835 for ( int i=0;i<GetNPixelsZ();i++ ) {
836 if (fHis->At(i)) ((TH1F*)fHis->At(i))->Reset();
840 //______________________________________________________________________
841 void AliITSsimulationSPD::SetCoupling(Int_t col, Int_t row, Int_t ntrack,
843 // Take into account the coupling between adiacent pixels.
844 // The parameters probcol and probrow are the probability of the
845 // signal in one pixel shared in the two adjacent pixels along
846 // the column and row direction, respectively.
847 // Note pList is goten via GetMap() and module is not need any more.
848 // Otherwise it is identical to that coded by Tiziano Virgili (BSN).
851 <img src="picts/ITS/barimodel_3.gif">
854 <font size=+2 color=red>
855 <a href="mailto:tiziano.virgili@cern.ch"></a>.
861 // Int_t col z cell index
862 // Int_t row x cell index
863 // Int_t ntrack track incex number
864 // Int_t idhit hit index number
870 Double_t pulse1,pulse2;
871 Double_t couplR=0.0,couplC=0.0;
874 GetCouplings(couplC,couplR);
875 if(GetDebug(3)) Info("SetCoupling","(col=%d,row=%d,ntrack=%d,idhit=%d) "
876 "Calling SetCoupling couplC=%e couplR=%e",
877 col,row,ntrack,idhit,couplC,couplR);
880 pulse1 = GetMap()->GetSignalOnly(col,row);
882 for (Int_t isign=-1;isign<=1;isign+=2){// loop in col direction
885 xr = gRandom->Rndm();
886 if ((j1<0) || (j1>GetNPixelsZ()-1) || (xr>couplC)){
890 UpdateMapSignal(row,j1,ntrack,idhit,pulse1);
892 flag = 1; // only first next!!
895 // loop in row direction
898 xr = gRandom->Rndm();
899 if ((j2<0) || (j2>GetNPixelsX()-1) || (xr>couplR)){
903 UpdateMapSignal(j2,col,ntrack,idhit,pulse2);
905 flag = 1; // only first next!!
910 //______________________________________________________________________
911 void AliITSsimulationSPD::SetCouplingOld(Int_t col, Int_t row,
912 Int_t ntrack,Int_t idhit) {
913 // Take into account the coupling between adiacent pixels.
914 // The parameters probcol and probrow are the fractions of the
915 // signal in one pixel shared in the two adjacent pixels along
916 // the column and row direction, respectively.
919 <img src="picts/ITS/barimodel_3.gif">
922 <font size=+2 color=red>
923 <a href="mailto:Rocco.Caliandro@ba.infn.it"></a>.
929 // Int_t col z cell index
930 // Int_t row x cell index
931 // Int_t ntrack track incex number
932 // Int_t idhit hit index number
933 // Int_t module module number
939 Double_t pulse1,pulse2;
940 Double_t couplR=0.0,couplC=0.0;
942 GetCouplings(couplC,couplR);
945 // cout << "Threshold --> " << GetThreshold() << endl; // dom
946 // cout << "Couplings --> " << couplC << " " << couplR << endl; // dom
948 if(GetDebug(3)) Info("SetCouplingOld","(col=%d,row=%d,ntrack=%d,idhit=%d) "
949 "Calling SetCoupling couplC=%e couplR=%e",
950 col,row,ntrack,idhit,couplC,couplR);
951 for (Int_t isign=-1;isign<=1;isign+=2){// loop in col direction
952 pulse1 = GetMap()->GetSignalOnly(col,row);
959 if ((j1<0)||(j1>GetNPixelsZ()-1)||(pulse1<GetThreshold())){
960 pulse1 = GetMap()->GetSignalOnly(col,row);
964 UpdateMapSignal(row,j1,ntrack,idhit,pulse1);
966 flag = 1; // only first next !!
969 // loop in row direction
973 if((j2<0)||(j2>(GetNPixelsX()-1))||(pulse2<GetThreshold())){
974 pulse2 = GetMap()->GetSignalOnly(col,row);
978 UpdateMapSignal(j2,col,ntrack,idhit,pulse2);
980 flag = 1; // only first next!!