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Minor changes in support of changes to AliITSdigitS?D class'.
[u/mrichter/AliRoot.git] / ITS / AliITSsimulationSPDdubna.cxx
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f74211b0 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/*
17$Log$
ee86d557 18Revision 1.6 2002/08/21 22:09:58 nilsen
19Updated SPD simulation with difusion effects. ReWritten Hit to SDigits
20code.
21
f74211b0 22*/
409f8c84 23#include <iostream.h>
24#include <TRandom.h>
25#include <TH1.h>
26#include <TMath.h>
27#include <TString.h>
28#include <TParticle.h>
29
409f8c84 30#include "AliRun.h"
31#include "AliITS.h"
32#include "AliITShit.h"
33#include "AliITSdigit.h"
34#include "AliITSmodule.h"
35#include "AliITSMapA2.h"
2cc6b29a 36#include "AliITSpList.h"
409f8c84 37#include "AliITSsimulationSPDdubna.h"
f74211b0 38#include "AliITSsegmentationSPD.h"
39#include "AliITSresponseSPDdubna.h"
409f8c84 40
f74211b0 41//#define DEBUG
409f8c84 42
43ClassImp(AliITSsimulationSPDdubna)
44////////////////////////////////////////////////////////////////////////
45// Version: 0
46// Written by Boris Batyunya
47// December 20 1999
48//
49// AliITSsimulationSPDdubna is the simulation of SPDs
2cc6b29a 50//______________________________________________________________________
51
52
53AliITSsimulationSPDdubna::AliITSsimulationSPDdubna(){
54 // constructor
55
56 fResponse = 0;
57 fSegmentation = 0;
58 fMapA2 = 0;
59 fpList = 0;
60 fModule = 0;
61 fEvent = 0;
62 fHis = 0;
63 fNoise = 0.;
64 fBaseline = 0.;
65 fNPixelsZ = 0;
66 fNPixelsX = 0;
409f8c84 67}
2cc6b29a 68//______________________________________________________________________
69AliITSsimulationSPDdubna::AliITSsimulationSPDdubna(AliITSsegmentation *seg,
70 AliITSresponse *resp){
71 // standard constructor
f74211b0 72 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
409f8c84 73
2cc6b29a 74 fHis = 0;
75 fResponse = resp;
76 fSegmentation = seg;
77 fModule = 0;
78 fEvent = 0;
409f8c84 79
2cc6b29a 80 fNPixelsZ=fSegmentation->Npz();
81 fNPixelsX=fSegmentation->Npx();
409f8c84 82
2cc6b29a 83 fResponse->GetNoiseParam(fNoise,fBaseline);
f74211b0 84 fResponse->SetDistanceOverVoltage(kmictocm*fSegmentation->Dy(),50.0);
409f8c84 85
f74211b0 86// fMapA2 = new AliITSMapA2(fSegmentation);
87 fMapA2 = 0;
409f8c84 88
2cc6b29a 89 fpList = new AliITSpList(fNPixelsZ+1,fNPixelsX+1);
409f8c84 90
2cc6b29a 91}
92//______________________________________________________________________
93AliITSsimulationSPDdubna::~AliITSsimulationSPDdubna(){
94 // destructor
409f8c84 95
f74211b0 96 if(fMapA2) delete fMapA2;
409f8c84 97
2cc6b29a 98 if (fHis) {
99 fHis->Delete();
100 delete fHis;
101 } // end if fHis
409f8c84 102}
2cc6b29a 103//______________________________________________________________________
104AliITSsimulationSPDdubna::AliITSsimulationSPDdubna(const
105 AliITSsimulationSPDdubna
106 &source){
107 // Copy Constructor
108 if(&source == this) return;
109 this->fMapA2 = source.fMapA2;
110 this->fNoise = source.fNoise;
111 this->fBaseline = source.fBaseline;
112 this->fNPixelsX = source.fNPixelsX;
113 this->fNPixelsZ = source.fNPixelsZ;
114 this->fHis = source.fHis;
115 return;
116}
117//______________________________________________________________________
118AliITSsimulationSPDdubna& AliITSsimulationSPDdubna::operator=(const
119 AliITSsimulationSPDdubna &source){
120 // Assignment operator
121 if(&source == this) return *this;
122 this->fMapA2 = source.fMapA2;
123 this->fNoise = source.fNoise;
124 this->fBaseline = source.fBaseline;
125 this->fNPixelsX = source.fNPixelsX;
126 this->fNPixelsZ = source.fNPixelsZ;
127 this->fHis = source.fHis;
128 return *this;
129}
130//______________________________________________________________________
131void AliITSsimulationSPDdubna::InitSimulationModule(Int_t module, Int_t event){
132 // This function creates maps to build the list of tracks for each
133 // summable digit.
134 //
135 // Inputs:
136 // Int_t module // Module number to be simulated
137 // Int_t event // Event number to be simulated
138 //
139 // Outputs:
140 // none
141 //
142 // Returns:
143 // none
409f8c84 144
2cc6b29a 145 fModule = module;
146 fEvent = event;
f74211b0 147// fMapA2->ClearMap();
2cc6b29a 148 fpList->ClearMap();
149}
150//_____________________________________________________________________
151void AliITSsimulationSPDdubna::SDigitiseModule(AliITSmodule *mod, Int_t mask,
152 Int_t event){
153 // This function begins the work of creating S-Digits
154 //
155 // Inputs:
156 // AliITSmodule *mod // module
157 // Int_t mask // mask to be applied to the module
158 //
159 // Outputs:
160 // none
161 //
162 // Return:
163 // test // test returns kTRUE if the module contained hits
164 // // test returns kFALSE if it did not contain hits
409f8c84 165
2cc6b29a 166 Int_t module = 0;
409f8c84 167
2cc6b29a 168 if(!(mod->GetNhits())) return;// if module has no hits don't create Sdigits
169 fModule = mod->GetIndex();
170 HitToSDigit(mod, module, mask, fpList);
171 WriteSDigits(fpList);
f74211b0 172// fMapA2->ClearMap();
2cc6b29a 173 fpList->ClearMap();
409f8c84 174}
2cc6b29a 175//______________________________________________________________________
176void AliITSsimulationSPDdubna::WriteSDigits(AliITSpList *pList){
177 // This function adds each S-Digit to pList
178 //
179 // Inputs:
180 // AliITSpList *pList
181 //
182 // Outputs:
183 // none
184 //
185 // Return:
186 // none
7d50ea21 187 Int_t ix, nix, iz, niz;
2cc6b29a 188 static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
189
7d50ea21 190 pList->GetMaxMapIndex(niz, nix);
191 for(iz=0; iz<niz; iz++)for(ix=0; ix<nix; ix++){
192 if(pList->GetSignalOnly(iz,ix)>0.0){
193 aliITS->AddSumDigit(*(pList->GetpListItem(iz,ix)));
f74211b0 194#ifdef DEBUG
195 cout <<"SDigits " << iz << "," << ix << "," <<
196 *(pList->GetpListItem(iz,ix)) << endl;
197#endif
2cc6b29a 198 } // end if pList
7d50ea21 199 } // end for iz,ix
2cc6b29a 200 return;
201}
202//______________________________________________________________________
203void AliITSsimulationSPDdubna::FinishSDigitiseModule(){
204 // This function calls SDigitsToDigits which creates Digits from SDigits
205 //
206 // Inputs:
207 // none
208 //
209 // Outputs:
210 // none
211 // Return
212 // none
409f8c84 213
2cc6b29a 214 SDigitsToDigits(fModule, fpList);
215 return;
216}
217//______________________________________________________________________
218void AliITSsimulationSPDdubna::SDigitsToDigits(Int_t module,
219 AliITSpList *pList){
220 // This function adds electronic noise to the S-Digits and then adds them
221 // to a new pList
222 //
223 // Inputs:
224 // Int_t module // module number
225 // AliITSpList *pList // pList
226 //
227 // Outputs:
228 // pList is passed along to the functions ChargeToSignal and GetList
229 //
230 // Return:
231 // none
409f8c84 232
2cc6b29a 233 fModule = module;
234 ChargeToSignal(pList); // Charge To Signal both adds noise and
f74211b0 235// fMapA2->ClearMap();
2cc6b29a 236 pList->ClearMap();
409f8c84 237}
2cc6b29a 238//______________________________________________________________________
239void AliITSsimulationSPDdubna::DigitiseModule(AliITSmodule *mod, Int_t module,
240 Int_t dummy){
241 // This function creates Digits straight from the hits and then adds
242 // electronic noise to the digits before adding them to pList
243 //
244 // Inputs:
245 // AliITSmodule *mod // module
246 // Int_t module // module number Dummy.
247 // Int_t dummy
248 //
249 // Outputs:
250 // Each of the input variables is passed along to HitToSDigit
251 //
252 // Return:
253 // none
409f8c84 254
2cc6b29a 255 fModule = mod->GetIndex(); //This calls the module for HitToSDigit
256 HitToSDigit(mod,fModule, dummy, fpList);
257 ChargeToSignal(fpList);
f74211b0 258// fMapA2->ClearMap();
2cc6b29a 259 fpList->ClearMap();
260}
261//______________________________________________________________________
7d50ea21 262void AliITSsimulationSPDdubna::UpdateMapSignal(Int_t iz, Int_t ix, Int_t trk,
2cc6b29a 263 Int_t ht, Int_t module,
264 Double_t signal,
265 AliITSpList *pList){
266 // This function adds a signal to the pList from the pList class
267 //
268 // Inputs:
7d50ea21 269 // Int_t iz // row number
270 // Int_t ix // column number
2cc6b29a 271 // Int_t trk // track number
272 // Int_t ht // hit number
273 // Double_t signal // signal strength
274 // AliITSpList *pList // pList
275 //
276 // Outputs:
277 // All of the inputs are passed to AliITSpList::AddSignal
278 // Int_t ix // row number
279 // Int_t iz // column number
280 // Double_t sig // signal strength
281 // // These three variables are defined to preserve the
282 // // assignments used in the function AliITSMapA2::AddSignal
283 //
284 // Return:
285 // none
2cc6b29a 286
f74211b0 287// fMapA2->AddSignal(iz, ix, signal);
7d50ea21 288 pList->AddSignal(iz,ix, trk, ht, fModule, signal);
2cc6b29a 289}
290//______________________________________________________________________
7d50ea21 291void AliITSsimulationSPDdubna::UpdateMapNoise(Int_t iz,
292 Int_t ix, Int_t fModule,
2cc6b29a 293 Double_t sig, Float_t noise,
294 AliITSpList *pList){
295 // This function adds noise to data in the MapA2 as well as the pList
296 //
297 // Inputs:
7d50ea21 298 // Int_t iz // row number
299 // Int_t ix // column number
2cc6b29a 300 // Int_t mod // module number
301 // Double_t sig // signal strength
302 // Double_t noise // electronic noise generated by ChargeToSignal
303 // AliITSpList *pList // pList
304 //
305 // Outputs:
306 // All of the inputs are passed to AliITSMapA2::AddSignal or
307 // AliITSpList::AddNoise
308 //
309 // Return:
310 // none
409f8c84 311
f74211b0 312// fMapA2->AddSignal(iz, ix, noise);
7d50ea21 313 pList->AddNoise(iz,ix, fModule, noise);
2cc6b29a 314}
315//______________________________________________________________________
316void AliITSsimulationSPDdubna::HitToDigit(AliITSmodule *mod, Int_t module,
317 Int_t dummy){
318 DigitiseModule(mod, module, dummy);
319}
320//______________________________________________________________________
321void AliITSsimulationSPDdubna::HitToSDigit(AliITSmodule *mod, Int_t module,
f74211b0 322 Int_t dummy,AliITSpList *pList){
323 // Does the charge distributions using Gaussian diffusion charge charing.
324 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
325 TObjArray *hits = mod->GetHits();
326 Int_t nhits = hits->GetEntriesFast();
327 Int_t h,ix,iz;
328 Int_t idtrack;
329 Double_t x0=0.0,x1=0.0,y0=0.0,y1=0.0,z0=0.0,z1=0.0,de=0.0;
330 Double_t x,y,z,t,tp,st,dt=0.2,el,sig;
331 Double_t thick = kmictocm*GetSeg()->Dy();
332
333 if(nhits<=0) return;
334 for(h=0;h<nhits;h++){
335#ifdef DEBUG
336 cout << "Hits=" << h << "," << *(mod->GetHit(h)) << endl;
337#endif
338 if(mod->LineSegmentL(h,x0,x1,y0,y1,z0,z1,de,idtrack)){
339 st =TMath::Sqrt(x1*x1+y1*y1+z1*z1);
340 if(st>0.0) for(t=0;t<1.0;t+=dt){ // Integrate over t
341 tp = t+0.5*dt;
342 el = GetResp()->GeVToCharge((Float_t)(dt*de));
343#ifdef DEBUG
344 if(el<=0.0) cout << "el="<<el<<" dt="<<dt<<" de="<<de<<endl;
345#endif
346 x = x0+x1*tp;
347 y = y0+y1*tp;
348 z = z0+z1*tp;
349 GetSeg()->LocalToDet(x,z,ix,iz);
350 sig = GetResp()->SigmaDiffusion1D(thick + y);
351 SpreadCharge(x,y,z,ix,iz,el,sig,
352 idtrack,mod->GetHitTrackIndex(h),h,mod->GetIndex());
353 } else { // st == 0.0 deposit it at this point
354 el = GetResp()->GeVToCharge((Float_t)de);
355 x = x0;
356 y = y0;
357 z = z0;
358 GetSeg()->LocalToDet(x,z,ix,iz);
359 sig = GetResp()->SigmaDiffusion1D(thick + y);
360 SpreadCharge(x,y,z,ix,iz,el,sig,
361 idtrack,mod->GetHitTrackIndex(h),h,mod->GetIndex());
362 } // end if st>0.0
363 }} // Loop over all hits h
364}
365//______________________________________________________________________
366void AliITSsimulationSPDdubna::SpreadCharge(Double_t x0,Double_t y0,
367 Double_t z0,Int_t ix0,Int_t iz0,
368 Double_t el,Double_t sig,Int_t t,
369 Int_t ti,Int_t hi,Int_t mod){
370 // Spreads the charge over neighboring cells. Assume charge is distributed
371 // as charge(x,z) = (el/2*pi*sig*sig)*exp(-arg)
372 // arg=((x-x0)*(x-x0)/2*sig*sig)+((z-z0*z-z0)/2*sig*sig)
373 // Defined this way, the integral over all x and z is el.
374 const Int_t knx = 3,knz = 2;
375 const Double_t kRoot2 = 1.414213562; // Sqrt(2).
376 const Double_t kmictocm = 1.0e-4; // convert microns to cm.
377 Int_t ix,iz,ixs,ixe,izs,ize;
378 Float_t x,z;
379 Double_t x1,x2,z1,z2,s,sp;
380
381 if(sig<=0.0) {
382 fpList->AddSignal(iz0,ix0,t,hi,mod,el);
383 return;
384 } // end if
385 sp = 1.0/(sig*kRoot2);
386#ifdef DEBUG
387 cout << "sig=" << sig << " sp=" << sp << endl;
388#endif
389 ixs = TMath::Max(-knx+ix0,0);
390 ixe = TMath::Min(knx+ix0,GetSeg()->Npx()-1);
391 izs = TMath::Max(-knz+iz0,0);
392 ize = TMath::Min(knz+iz0,GetSeg()->Npz()-1);
393 for(ix=ixs;ix<=ixe;ix++) for(iz=izs;iz<=ize;iz++){
394 GetSeg()->DetToLocal(ix,iz,x,z); // pixel center
395 x1 = x;
396 z1 = z;
397 x2 = x1 + 0.5*kmictocm*GetSeg()->Dpx(ix); // Upper
398 x1 -= 0.5*kmictocm*GetSeg()->Dpx(ix); // Lower
399 z2 = z1 + 0.5*kmictocm*GetSeg()->Dpz(iz); // Upper
400 z1 -= 0.5*kmictocm*GetSeg()->Dpz(iz); // Lower
401 x1 -= x0; // Distance from where track traveled
402 x2 -= x0; // Distance from where track traveled
403 z1 -= z0; // Distance from where track traveled
404 z2 -= z0; // Distance from where track traveled
405 s = 0.25; // Correction based on definision of Erfc
406 s *= TMath::Erfc(sp*x1) - TMath::Erfc(sp*x2);
407#ifdef DEBUG
408 cout << "el=" << el << " ix0=" << ix0 << " ix=" << ix << " x0="<< x <<
409 " iz0=" << iz0 << " iz=" << iz << " z0=" << z <<
410 " sp*x1=" << sp*x1 <<" sp*x2=" << sp*x2 << " s=" << s;
411#endif
412 s *= TMath::Erfc(sp*z1) - TMath::Erfc(sp*z2);
413#ifdef DEBUG
414 cout << " sp*z1=" << sp*z1 <<" sp*z2=" << sp*z2 << " s=" << s << endl;
415#endif
416 fpList->AddSignal(iz,ix,t,hi,mod,s*el);
417 } // end for ix, iz
418}
419//______________________________________________________________________
420void AliITSsimulationSPDdubna::HitToSDigitOld(AliITSmodule *mod, Int_t module,
2cc6b29a 421 Int_t dummy, AliITSpList *pList){
422 // digitize module
409f8c84 423 const Float_t kEnToEl = 2.778e+8; // GeV->charge in electrons
424 // for 3.6 eV/pair
425 const Float_t kconv = 10000.; // cm -> microns
426
427 Float_t spdLength = fSegmentation->Dz();
428 Float_t spdWidth = fSegmentation->Dx();
338e4f06 429 Float_t spdThickness = fSegmentation->Dy();
409f8c84 430 Float_t difCoef, dum;
431 fResponse->DiffCoeff(difCoef,dum);
338e4f06 432 if(spdThickness > 290) difCoef = 0.00613;
409f8c84 433
434 Float_t zPix0 = 1e+6;
435 Float_t xPix0 = 1e+6;
436 Float_t yPrev = 1e+6;
437
438 Float_t zPitch = fSegmentation->Dpz(0);
439 Float_t xPitch = fSegmentation->Dpx(0);
440
441 TObjArray *fHits = mod->GetHits();
2cc6b29a 442 module = mod->GetIndex();
409f8c84 443 Int_t nhits = fHits->GetEntriesFast();
444 if (!nhits) return;
f74211b0 445#ifdef DEBUG
2cc6b29a 446 cout<<"len,wid,thickness,nx,nz,pitchx,pitchz,difcoef ="<<spdLength<<","
447 <<spdWidth<<","<<spdThickness<<","<<fNPixelsX<<","<<fNPixelsZ<<","
448 <<xPitch<<","<<zPitch<<","<<difCoef<<endl;
f74211b0 449#endif
2cc6b29a 450 // Array of pointers to the label-signal list
409f8c84 451 Int_t indexRange[4] = {0,0,0,0};
452
453 // Fill detector maps with GEANT hits
454 // loop over hits in the module
455 static Bool_t first;
456 Int_t lasttrack=-2;
457 Int_t hit, iZi, jz, jx;
338e4f06 458 Int_t idhit=-1; //!
f74211b0 459#ifdef DEBUG
338e4f06 460 cout<<"SPDdubna: module,nhits ="<<module<<","<<nhits<<endl;
f74211b0 461#endif
409f8c84 462 for (hit=0;hit<nhits;hit++) {
463 AliITShit *iHit = (AliITShit*) fHits->At(hit);
f74211b0 464#ifdef DEBUG
465 cout << "Hits=" << hit << "," << *iHit << endl;
466#endif
338e4f06 467 //Int_t layer = iHit->GetLayer();
468 Float_t yPix0 = -spdThickness/2;
469
470 // work with the idtrack=entry number in the TreeH
471 //Int_t idhit,idtrack; //!
472 //mod->GetHitTrackAndHitIndex(hit,idtrack,idhit); //!
473 //Int_t idtrack=mod->GetHitTrackIndex(hit);
474 // or store straight away the particle position in the array
475 // of particles :
409f8c84 476 if(iHit->StatusEntering()) idhit=hit;
477 Int_t itrack = iHit->GetTrack();
478 Int_t dray = 0;
479
480 if (lasttrack != itrack || hit==(nhits-1)) first = kTRUE;
481
338e4f06 482 //Int_t parent = iHit->GetParticle()->GetFirstMother();
409f8c84 483 Int_t partcode = iHit->GetParticle()->GetPdgCode();
484
2cc6b29a 485 // partcode (pdgCode): 11 - e-, 13 - mu-, 22 - gamma, 111 - pi0,
486 // 211 - pi+, 310 - K0s, 321 - K+, 2112 - n, 2212 - p, 3122 - lambda
409f8c84 487
488 Float_t pmod = iHit->GetParticle()->P(); // total momentum at the
489 // vertex
490 pmod *= 1000;
491
409f8c84 492 if(partcode == 11 && pmod < 6) dray = 1; // delta ray is e-
493 // at p < 6 MeV/c
494
409f8c84 495 // Get hit z and x(r*phi) cordinates for each module (detector)
496 // in local system.
497
498 Float_t zPix = kconv*iHit->GetZL();
499 Float_t xPix = kconv*iHit->GetXL();
500 Float_t yPix = kconv*iHit->GetYL();
501
502 // Get track status
503 Int_t status = iHit->GetTrackStatus();
409f8c84 504
505 // Check boundaries
506 if(zPix > spdLength/2) {
f74211b0 507#ifdef DEBUG
508 cout<<"!!! SPD: z outside ="<<zPix<<endl;
509#endif
2cc6b29a 510 zPix = spdLength/2 - 10;
409f8c84 511 }
512 if(zPix < 0 && zPix < -spdLength/2) {
f74211b0 513#ifdef DEBUG
514 cout<<"!!! SPD: z outside ="<<zPix<<endl;
515#endif
2cc6b29a 516 zPix = -spdLength/2 + 10;
409f8c84 517 }
518 if(xPix > spdWidth/2) {
f74211b0 519#ifdef DEBUG
520 cout<<"!!! SPD: x outside ="<<xPix<<endl;
521#endif
2cc6b29a 522 xPix = spdWidth/2 - 10;
409f8c84 523 }
524 if(xPix < 0 && xPix < -spdWidth/2) {
f74211b0 525#ifdef DEBUG
526 cout<<"!!! SPD: x outside ="<<xPix<<endl;
527#endif
2cc6b29a 528 xPix = -spdWidth/2 + 10;
409f8c84 529 }
530 Int_t trdown = 0;
531
532 // enter Si or after event in Si
533 if (status == 66 ) {
2cc6b29a 534 zPix0 = zPix;
535 xPix0 = xPix;
536 yPrev = yPix;
537 } // end if status == 66
409f8c84 538
539 Float_t depEnergy = iHit->GetIonization();
540 // skip if the input point to Si
541
542 if(depEnergy <= 0.) continue;
543
544 // if track returns to the opposite direction:
545 if (yPix < yPrev) {
546 trdown = 1;
2cc6b29a 547 } // end if yPix < yPrev
409f8c84 548
549 // take into account the holes diffusion inside the Silicon
550 // the straight line between the entrance and exit points in Si is
551 // divided into the several steps; the diffusion is considered
552 // for each end point of step and charge
553 // is distributed between the pixels through the diffusion.
409f8c84 554
555 // ---------- the diffusion in Z (beam) direction -------
409f8c84 556 Float_t charge = depEnergy*kEnToEl; // charge in e-
557 Float_t drPath = 0.;
558 Float_t tang = 0.;
559 Float_t sigmaDif = 0.;
560 Float_t zdif = zPix - zPix0;
561 Float_t xdif = xPix - xPix0;
562 Float_t ydif = TMath::Abs(yPix - yPrev);
563 Float_t ydif0 = TMath::Abs(yPrev - yPix0);
564
565 if(ydif < 1) continue; // ydif is not zero
566
567 Float_t projDif = sqrt(xdif*xdif + zdif*zdif);
568
569 Int_t ndZ = (Int_t)TMath::Abs(zdif/zPitch) + 1;
570 Int_t ndX = (Int_t)TMath::Abs(xdif/xPitch) + 1;
571
572 // number of the steps along the track:
573 Int_t nsteps = ndZ;
574 if(ndX > ndZ) nsteps = ndX;
338e4f06 575 if(nsteps < 20) nsteps = 20; // minimum number of the steps
409f8c84 576
577 if (projDif < 5 ) {
2cc6b29a 578 drPath = (yPix-yPix0)*1.e-4;
579 drPath = TMath::Abs(drPath); // drift path in cm
580 sigmaDif = difCoef*sqrt(drPath); // sigma diffusion in cm
581 sigmaDif = sigmaDif*kconv; // sigma diffusion in microns
582 nsteps = 1;
583 } // end if projDif < 5
409f8c84 584
585 if(projDif > 5) tang = ydif/projDif;
586 Float_t dCharge = charge/nsteps; // charge in e- for one step
587 Float_t dZ = zdif/nsteps;
588 Float_t dX = xdif/nsteps;
589
2cc6b29a 590 for (iZi = 1; iZi <= nsteps;iZi++) {
591 Float_t dZn = iZi*dZ;
409f8c84 592 Float_t dXn = iZi*dX;
593 Float_t zPixn = zPix0 + dZn;
594 Float_t xPixn = xPix0 + dXn;
595
596 if(projDif >= 5) {
2cc6b29a 597 Float_t dProjn = sqrt(dZn*dZn+dXn*dXn);
598 drPath = dProjn*tang*1.e-4; // drift path for iZi+1 step in cm
599 if(trdown == 0) {
600 drPath = TMath::Abs(drPath) + ydif0*1.e-4;
601 }// end if trdow ==0
602 if(trdown == 1) {
603 drPath = ydif0*1.e-4 - TMath::Abs(drPath);
604 drPath = TMath::Abs(drPath);
605 } // end if trdown == 1
606 sigmaDif = difCoef*sqrt(drPath);
607 sigmaDif = sigmaDif*kconv; // sigma diffusion in microns
608 } // end if projdif >= 5
409f8c84 609
610 zPixn = (zPixn + spdLength/2.);
611 xPixn = (xPixn + spdWidth/2.);
612 Int_t nZpix, nXpix;
613 fSegmentation->GetPadIxz(xPixn,zPixn,nXpix,nZpix);
614 zPitch = fSegmentation->Dpz(nZpix);
615 fSegmentation->GetPadTxz(xPixn,zPixn);
616 // set the window for the integration
617 Int_t jzmin = 1;
618 Int_t jzmax = 3;
619 if(nZpix == 1) jzmin =2;
620 if(nZpix == fNPixelsZ) jzmax = 2;
621
622 Int_t jxmin = 1;
623 Int_t jxmax = 3;
624 if(nXpix == 1) jxmin =2;
625 if(nXpix == fNPixelsX) jxmax = 2;
626
627 Float_t zpix = nZpix;
628 Float_t dZright = zPitch*(zpix - zPixn);
629 Float_t dZleft = zPitch - dZright;
630
631 Float_t xpix = nXpix;
632 Float_t dXright = xPitch*(xpix - xPixn);
633 Float_t dXleft = xPitch - dXright;
634
635 Float_t dZprev = 0.;
636 Float_t dZnext = 0.;
637 Float_t dXprev = 0.;
638 Float_t dXnext = 0.;
639
640 for(jz=jzmin; jz <=jzmax; jz++) {
641 if(jz == 1) {
2cc6b29a 642 dZprev = -zPitch - dZleft;
643 dZnext = -dZleft;
644 } else if(jz == 2) {
645 dZprev = -dZleft;
646 dZnext = dZright;
647 } else if(jz == 3) {
648 dZprev = dZright;
649 dZnext = dZright + zPitch;
650 } // end if jz
409f8c84 651 // kz changes from 1 to the fNofPixels(270)
652 Int_t kz = nZpix + jz -2;
653
654 Float_t zArg1 = dZprev/sigmaDif;
655 Float_t zArg2 = dZnext/sigmaDif;
656 Float_t zProb1 = TMath::Erfc(zArg1);
657 Float_t zProb2 = TMath::Erfc(zArg2);
658 Float_t dZCharge =0.5*(zProb1-zProb2)*dCharge;
659
660
661 // ----------- holes diffusion in X(r*phi) direction --------
662
663 if(dZCharge > 1.) {
2cc6b29a 664 for(jx=jxmin; jx <=jxmax; jx++) {
665 if(jx == 1) {
666 dXprev = -xPitch - dXleft;
667 dXnext = -dXleft;
668 } else if(jx == 2) {
669 dXprev = -dXleft;
670 dXnext = dXright;
671 } else if(jx == 3) {
672 dXprev = dXright;
673 dXnext = dXright + xPitch;
674 } // end if jx
675 Int_t kx = nXpix + jx -2;
676 Float_t xArg1 = dXprev/sigmaDif;
677 Float_t xArg2 = dXnext/sigmaDif;
678 Float_t xProb1 = TMath::Erfc(xArg1);
679 Float_t xProb2 = TMath::Erfc(xArg2);
680 Float_t dXCharge =0.5*(xProb1-xProb2)*dZCharge;
681
682 if(dXCharge > 1.) {
2cc6b29a 683 if (first) {
f74211b0 684 indexRange[0]=indexRange[1]=kz-1;
2cc6b29a 685 indexRange[2]=indexRange[3]=kx-1;
686 first=kFALSE;
687 } // end if first
688 indexRange[0]=TMath::Min(indexRange[0],kz-1);
689 indexRange[1]=TMath::Max(indexRange[1],kz-1);
690 indexRange[2]=TMath::Min(indexRange[2],kx-1);
691 indexRange[3]=TMath::Max(indexRange[3],kx-1);
f74211b0 692/*
2cc6b29a 693 // build the list of digits for this module
f74211b0 694 Double_t signal = fMapA2->GetSignal(kz-1,kx-1);
2cc6b29a 695 signal+=dXCharge;
f74211b0 696 fMapA2->SetHit(kz-1,kx-1,(double)signal);
697*/
2cc6b29a 698 // The calling sequence for UpdateMapSignal was
699 // moved into the (dx > 1 e-) loop because it
700 // needs to call signal which is defined inside
701 // this loop
2cc6b29a 702 fModule = module;//Defined because functions
703 // called by UpdateMapSignal
704 // expect module to be an
705 // integer
7d50ea21 706 UpdateMapSignal(kz-1,kx-1,
ee86d557 707// mod->GetHitTrackIndex(hit),
708 ((AliITShit*)(mod->GetHit(hit)))->GetTrack(),
f74211b0 709 hit,fModule,dXCharge,pList);
2cc6b29a 710 } // dXCharge > 1 e-
711 } // jx loop
409f8c84 712 } // dZCharge > 1 e-
713 } // jz loop
714 } // iZi loop
409f8c84 715 if (status == 65) { // the step is inside of Si
2cc6b29a 716 zPix0 = zPix;
717 xPix0 = xPix;
718 } // end if status == 65
719 yPrev = yPix;
409f8c84 720 } // hit loop inside the module
409f8c84 721}
2cc6b29a 722//______________________________________________________________________
723void AliITSsimulationSPDdubna::ChargeToSignal(AliITSpList *pList){
724 // add noise and electronics, perform the zero suppression and add the
725 // digit to the list
f74211b0 726 static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
2cc6b29a 727 Float_t threshold = (float)fResponse->MinVal();
f74211b0 728 Int_t j;
729// Int_t digits[3], tracks[3], hits[3];
730// Float_t charges[3];
2cc6b29a 731 Float_t electronics;
f74211b0 732// Float_t phys;
2cc6b29a 733 Double_t sig;
ee86d557 734 const Int_t nmaxtrk=AliITSdigitSPD::GetNTracks();
f74211b0 735 static AliITSdigitSPD dig;
736
2cc6b29a 737 for(Int_t iz=0; iz<fNPixelsZ; iz++){
738 for(Int_t ix=0; ix<fNPixelsX; ix++){
739 electronics = fBaseline + fNoise*gRandom->Gaus();
f74211b0 740 sig = pList->GetSignalOnly(iz,ix);
741 UpdateMapNoise(iz,ix,fModule,sig,electronics,pList);
742#ifdef DEBUG
743// cout << sig << "+" << electronics <<">threshold=" << threshold
744// << endl;
745#endif
746 if (sig+electronics > threshold) {
747 dig.fCoord1 = iz;
748 dig.fCoord2 = ix;
749 dig.fSignal = 1;
750 dig.fSignalSPD = (Int_t) pList->GetSignal(iz,ix);
751 /*
752 digits[0] = iz;
753 digits[1] = ix;
754 digits[2] = 1; */
755 for(j=0;j<nmaxtrk;j++){
756// charges[j] = 0.0;
ee86d557 757 if (j<pList->GetNEnteries()) {
f74211b0 758 dig.fTracks[j] = pList->GetTrack(iz,ix,j);
759 dig.fHits[j] = pList->GetHit(iz,ix,j);
760 /*
761 tracks[j] = pList->GetTrack(iz,ix,j);
762 hits[j] = pList->GetHit(iz,ix,j);
763 */
764 }else { // Default values
ee86d557 765 dig.fTracks[j] = -3;
766 dig.fHits[j] = -1;
f74211b0 767/* tracks[j] = -2; //noise
768 hits[j] = -1; */
2cc6b29a 769 } // end if pList
f74211b0 770 } // end for j
771// charges[0] = (Float_t) pList->GetSumSignal(iz,ix);
772/*
2cc6b29a 773 if(tracks[0] == tracks[1] && tracks[0] == tracks[2]) {
774 tracks[1] = -3;
775 hits[1] = -1;
776 tracks[2] = -3;
777 hits[2] = -1;
778 } else if(tracks[0] == tracks[1] && tracks[0] != tracks[2]) {
779 tracks[1] = -3;
780 hits[1] = -1;
781 } else if(tracks[0] == tracks[2] && tracks[0] != tracks[1]) {
782 tracks[2] = -3;
783 hits[2] = -1;
784 } else if(tracks[1] == tracks[2] && tracks[0] != tracks[1]) {
785 tracks[2] = -3;
786 hits[2] = -1;
787 } // end if
f74211b0 788*/
789// phys = 0.0;
790#ifdef DEBUG
791 cout << iz << "," << ix << "," <<
792 *(pList->GetpListItem(iz,ix)) << endl;
793#endif
794// aliITS->AddSimDigit(0, phys, digits, tracks, hits, charges);
795 aliITS->AddSimDigit(0,&dig);
2cc6b29a 796 } //
797 } //
798 } //
409f8c84 799}
2cc6b29a 800//______________________________________________________________________
801void AliITSsimulationSPDdubna::CreateHistograms(){
802 // create 1D histograms for tests
803
804 printf("SPD - create histograms\n");
805
806 fHis=new TObjArray(fNPixelsZ);
807 TString spdName("spd_");
808 for (Int_t i=0;i<fNPixelsZ;i++) {
809 Char_t pixelz[4];
810 sprintf(pixelz,"%d",i+1);
811 spdName.Append(pixelz);
812 //PH (*fHis)[i] = new TH1F(spdName.Data(),"SPD maps",
813 //PH fNPixelsX,0.,(Float_t) fNPixelsX);
814 fHis->AddAt(new TH1F(spdName.Data(),"SPD maps",
815 fNPixelsX,0.,(Float_t) fNPixelsX), i);
816 } // end for i
409f8c84 817}
2cc6b29a 818//______________________________________________________________________
819void AliITSsimulationSPDdubna::ResetHistograms(){
409f8c84 820 //
821 // Reset histograms for this detector
822 //
823
824 for ( int i=0;i<fNPixelsZ;i++ ) {
2cc6b29a 825 //PH if ((*fHis)[i]) ((TH1F*)(*fHis)[i])->Reset();
2682e810 826 if (fHis->At(i)) ((TH1F*)fHis->At(i))->Reset();
2cc6b29a 827 } // end for i
409f8c84 828}