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1 | /************************************************************************** | |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* $Id$ */ | |
17 | ||
18 | #include <stdio.h> | |
19 | #include <stdlib.h> | |
20 | #include <Riostream.h> | |
21 | #include <TObjArray.h> | |
22 | #include <TRandom.h> | |
23 | ||
24 | #include "AliITSmodule.h" | |
25 | #include "AliITSMapA2.h" | |
26 | #include "AliITSpList.h" | |
27 | #include "AliITSCalibrationSSD.h" | |
28 | #include "AliITSsegmentationSSD.h" | |
29 | //#include "AliITSdcsSSD.h" | |
30 | #include "AliITS.h" | |
31 | #include "AliITShit.h" | |
32 | #include "AliITSdigitSSD.h" | |
33 | #include "AliRun.h" | |
34 | #include "AliITSgeom.h" | |
35 | #include "AliITSsimulationSSD.h" | |
36 | #include "AliITSTableSSD.h" | |
37 | #include <TF1.h> | |
38 | ||
39 | ||
40 | ClassImp(AliITSsimulationSSD) | |
41 | //////////////////////////////////////////////////////////////////////// | |
42 | // // | |
43 | // Author: Enrico Fragiacomo // | |
44 | // enrico.fragiacomo@ts.infn.it // | |
45 | // Last revised: june 2008 // | |
46 | // // | |
47 | // AliITSsimulationSSD is the simulation of SSD. // | |
48 | //////////////////////////////////////////////////////////////////////// | |
49 | ||
50 | //---------------------------------------------------------------------- | |
51 | AliITSsimulationSSD::AliITSsimulationSSD():AliITSsimulation(), | |
52 | //fDCS(0), | |
53 | fMapA2(0), | |
54 | fIonE(0.0), | |
55 | fDifConst(), | |
56 | fDriftVel(), | |
57 | fTimeResponse(NULL){ | |
58 | //default Constructor | |
59 | //Inputs: | |
60 | // none. | |
61 | // Outputs: | |
62 | // none. | |
63 | // Return: | |
64 | // A default construction AliITSsimulationSSD class | |
65 | } | |
66 | //---------------------------------------------------------------------- | |
67 | AliITSsimulationSSD::AliITSsimulationSSD(AliITSDetTypeSim* dettyp): | |
68 | AliITSsimulation(dettyp), | |
69 | //fDCS(0), | |
70 | fMapA2(0), | |
71 | fIonE(0.0), | |
72 | fDifConst(), | |
73 | fDriftVel(), | |
74 | fTimeResponse(NULL){ | |
75 | // Constructor | |
76 | // Input: | |
77 | // AliITSDetTypeSim Pointer to the SSD dettype to be used | |
78 | // Outputs: | |
79 | // none. | |
80 | // Return | |
81 | // A standard constructed AliITSsimulationSSD class | |
82 | ||
83 | fTimeResponse = new TF1("ftimeresponse",".5*x*exp(1.-.5*x)"); | |
84 | Init(); | |
85 | } | |
86 | //---------------------------------------------------------------------- | |
87 | void AliITSsimulationSSD::Init(){ | |
88 | // Inilizer, Inilizes all of the variable as needed in a standard place. | |
89 | // Input: | |
90 | // AliITSsegmentationSSD *seg Pointer to the SSD segmentation to be used | |
91 | // AliITSCalibrationSSD *resp Pointer to the SSD responce class to be used | |
92 | // Outputs: | |
93 | // none. | |
94 | // Return | |
95 | // none. | |
96 | AliITSsegmentationSSD* seg = (AliITSsegmentationSSD*)GetSegmentationModel(2); | |
97 | ||
98 | SetDriftVelocity(); // use default values in .h file | |
99 | SetIonizeE(); // use default values in .h file | |
100 | SetDiffConst(); // use default values in .h file | |
101 | fpList = new AliITSpList(2,GetNStrips()); | |
102 | fMapA2 = new AliITSMapA2(seg); | |
103 | } | |
104 | //______________________________________________________________________ | |
105 | AliITSsimulationSSD& AliITSsimulationSSD::operator=( | |
106 | const AliITSsimulationSSD &s){ | |
107 | // Operator = | |
108 | ||
109 | if(this==&s) return *this; | |
110 | ||
111 | // this->fDCS = new AliITSdcsSSD(*(s.fDCS)); | |
112 | this->fMapA2 = s.fMapA2; | |
113 | this->fIonE = s.fIonE; | |
114 | this->fDifConst[0] = s.fDifConst[0]; | |
115 | this->fDifConst[1] = s.fDifConst[1]; | |
116 | this->fDriftVel[0] = s.fDriftVel[0]; | |
117 | this->fDriftVel[1] = s.fDriftVel[1]; | |
118 | this->fTimeResponse = s.fTimeResponse; | |
119 | return *this; | |
120 | } | |
121 | /* | |
122 | //______________________________________________________________________ | |
123 | AliITSsimulation& AliITSsimulationSSD::operator=( | |
124 | const AliITSsimulation &s){ | |
125 | // Operator = | |
126 | ||
127 | if(this==&s) return *this; | |
128 | Error("AliITSsimulationSSD","Not allowed to make a = with " | |
129 | "AliITSsimulationSSD Using default creater instead"); | |
130 | ||
131 | return *this; | |
132 | } | |
133 | */ | |
134 | //______________________________________________________________________ | |
135 | AliITSsimulationSSD::AliITSsimulationSSD(const AliITSsimulationSSD &source): | |
136 | AliITSsimulation(source), | |
137 | fMapA2(source.fMapA2), | |
138 | fIonE(source.fIonE), | |
139 | fDifConst(), | |
140 | fDriftVel(), | |
141 | fTimeResponse(source.fTimeResponse){ | |
142 | // copy constructor | |
143 | fDifConst[0] = source.fDifConst[0]; | |
144 | fDifConst[1] = source.fDifConst[1]; | |
145 | fDriftVel[0] = source.fDriftVel[0]; | |
146 | fDriftVel[1] = source.fDriftVel[1]; | |
147 | } | |
148 | //______________________________________________________________________ | |
149 | AliITSsimulationSSD::~AliITSsimulationSSD() { | |
150 | // destructor | |
151 | delete fMapA2; | |
152 | delete fTimeResponse; | |
153 | //delete fDCS; | |
154 | } | |
155 | //______________________________________________________________________ | |
156 | void AliITSsimulationSSD::InitSimulationModule(Int_t module,Int_t event){ | |
157 | // Creates maps to build the list of tracks for each sumable digit | |
158 | // Inputs: | |
159 | // Int_t module // Module number to be simulated | |
160 | // Int_t event // Event number to be simulated | |
161 | // Outputs: | |
162 | // none. | |
163 | // Return | |
164 | // none. | |
165 | ||
166 | SetModuleNumber(module); | |
167 | SetEventNumber(event); | |
168 | fMapA2->ClearMap(); | |
169 | fpList->ClearMap(); | |
170 | } | |
171 | //______________________________________________________________________ | |
172 | void AliITSsimulationSSD::FinishSDigitiseModule(){ | |
173 | // Does the Sdigits to Digits work | |
174 | // Inputs: | |
175 | // none. | |
176 | // Outputs: | |
177 | // none. | |
178 | // Return: | |
179 | // none. | |
180 | ||
181 | FillMapFrompList(fpList); // need to check if needed here or not???? | |
182 | SDigitToDigit(fModule,fpList); | |
183 | fpList->ClearMap(); | |
184 | fMapA2->ClearMap(); | |
185 | } | |
186 | //______________________________________________________________________ | |
187 | void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod,Int_t,Int_t) { | |
188 | // Digitizes hits for one SSD module | |
189 | SetModuleNumber(mod->GetIndex()); | |
190 | ||
191 | HitsToAnalogDigits(mod,fpList); | |
192 | SDigitToDigit(GetModuleNumber(),fpList); | |
193 | ||
194 | fpList->ClearMap(); | |
195 | fMapA2->ClearMap(); | |
196 | } | |
197 | //______________________________________________________________________ | |
198 | void AliITSsimulationSSD::SDigitiseModule(AliITSmodule *mod,Int_t,Int_t) { | |
199 | // Produces Summable/Analog digits and writes them to the SDigit tree. | |
200 | ||
201 | HitsToAnalogDigits(mod,fpList); | |
202 | ||
203 | WriteSDigits(fpList); | |
204 | ||
205 | fpList->ClearMap(); | |
206 | fMapA2->ClearMap(); | |
207 | } | |
208 | //______________________________________________________________________ | |
209 | void AliITSsimulationSSD::SDigitToDigit(Int_t module,AliITSpList *pList){ | |
210 | // Takes the pList and finishes the digitization. | |
211 | ||
212 | ApplyNoise(pList,module); | |
213 | ApplyCoupling(pList,module); | |
214 | ApplyDeadChannels(module); | |
215 | ||
216 | ChargeToSignal(module,pList); | |
217 | } | |
218 | //______________________________________________________________________ | |
219 | void AliITSsimulationSSD::HitsToAnalogDigits(AliITSmodule *mod, | |
220 | AliITSpList *pList){ | |
221 | // Loops over all hits to produce Analog/floating point digits. This | |
222 | // is also the first task in producing standard digits. | |
223 | Int_t lasttrack = -2; | |
224 | Int_t idtrack = -2; | |
225 | Double_t x0=0.0, y0=0.0, z0=0.0; | |
226 | Double_t x1=0.0, y1=0.0, z1=0.0; | |
227 | Double_t de=0.0; | |
228 | Int_t module = mod->GetIndex(); | |
229 | Double_t tof = 0.; | |
230 | ||
231 | ||
232 | AliITSsegmentationSSD* seg = (AliITSsegmentationSSD*)GetSegmentationModel(2); | |
233 | ||
234 | TObjArray *hits = mod->GetHits(); | |
235 | Int_t nhits = hits->GetEntriesFast(); | |
236 | if (nhits<=0) return; | |
237 | AliITSTableSSD * tav = new AliITSTableSSD(GetNStrips()); | |
238 | module = mod->GetIndex(); | |
239 | if ( mod->GetLayer() == 6 ) seg->SetLayer(6); | |
240 | if ( mod->GetLayer() == 5 ) seg->SetLayer(5); | |
241 | for(Int_t i=0; i<nhits; i++) { | |
242 | // LineSegmentL returns 0 if the hit is entering | |
243 | // If hits is exiting returns positions of entering and exiting hits | |
244 | // Returns also energy loss | |
245 | if(GetDebug(4)){ | |
246 | cout << i << " "; | |
247 | cout << mod->GetHit(i)->GetXL() << " "<<mod->GetHit(i)->GetYL(); | |
248 | cout << " " << mod->GetHit(i)->GetZL(); | |
249 | cout << endl; | |
250 | } // end if | |
251 | if (mod->LineSegmentL(i, x0, x1, y0, y1, z0, z1, de, idtrack)) { | |
252 | ||
253 | // Scale down dE/dx according to the hit's TOF wrt to the trigger | |
254 | // Necessary for pileup simulation | |
255 | // EF - 21/04/09 | |
256 | tof = mod->GetHit(i)->GetTOF(); | |
257 | tof *= 1.E+6; // convert time in microsecond | |
258 | if(tof<2.) de = de * fTimeResponse->Eval(-1.*tof+2.); | |
259 | else de = 0.; | |
260 | // | |
261 | ||
262 | HitToDigit(module, x0, y0, z0, x1, y1, z1, de,tav); | |
263 | if (lasttrack != idtrack || i==(nhits-1)) { | |
264 | GetList(idtrack,i,module,pList,tav); | |
265 | } // end if | |
266 | lasttrack=idtrack; | |
267 | } // end if | |
268 | } // end loop over hits | |
269 | delete tav; tav=0; | |
270 | return; | |
271 | } | |
272 | //---------------------------------------------------------------------- | |
273 | void AliITSsimulationSSD::HitToDigit(Int_t module, Double_t x0, Double_t y0, | |
274 | Double_t z0, Double_t x1, Double_t y1, | |
275 | Double_t z1, Double_t de, | |
276 | AliITSTableSSD *tav) { | |
277 | ||
278 | // hit to digit conversion | |
279 | ||
280 | AliITSsegmentationSSD* seg = (AliITSsegmentationSSD*)GetSegmentationModel(2); | |
281 | // Turns hits in SSD module into one or more digits. | |
282 | //Float_t tang[2] = {0.0,0.0}; | |
283 | //seg->Angles(tang[0], tang[1]);//stereo<<->tan(stereo)~=stereo | |
284 | Double_t x, y, z; | |
285 | Double_t dex=0.0, dey=0.0, dez=0.0; | |
286 | Double_t pairs; // pair generation energy per step. | |
287 | Double_t sigma[2] = {0.,0.};// standard deviation of the diffusion gaussian | |
288 | Double_t tdrift[2] = {0.,0.}; // time of drift | |
289 | Double_t w; | |
290 | Double_t inf[2], sup[2], par0[2]; | |
291 | ||
292 | // Steps in the module are determined "manually" (i.e. No Geant) | |
293 | // NumOfSteps divide path between entering and exiting hits in steps | |
294 | Int_t numOfSteps = NumOfSteps(x1, y1, z1, dex, dey, dez); | |
295 | // Enery loss is equally distributed among steps | |
296 | de = de/numOfSteps; | |
297 | pairs = de/GetIonizeE(); // e-h pairs generated | |
298 | ||
299 | //----------------------------------------------------- | |
300 | // stepping | |
301 | //----------------------------------------------------- | |
302 | for(Int_t j=0; j<numOfSteps; j++) { // stepping | |
303 | ||
304 | x = x0 + (j+0.5)*dex; | |
305 | y = y0 + (j+0.5)*dey; | |
306 | if ( y > (seg->Dy()/2+10)*1.0E-4 ) { | |
307 | // check if particle is within the detector | |
308 | Warning("HitToDigit", | |
309 | "hit out of detector y0=%e,y=%e,dey=%e,j =%d module=%d, exceed=%e", | |
310 | y0,y,dey,j,module, y-(seg->Dy()/2+10)*1.0E-4); | |
311 | return; | |
312 | } // end if | |
313 | z = z0 + (j+0.5)*dez; | |
314 | ||
315 | if(GetDebug(4)) cout <<"HitToDigit "<<x<<" "<<y<<" "<<z<< " " | |
316 | <<dex<<" "<<dey<<" "<<dez<<endl; | |
317 | ||
318 | if(seg->GetLayer()==6) { | |
319 | y=-y; // Lay6 module has sensor up-side-down!!! | |
320 | } | |
321 | ||
322 | // w is the coord. perpendicular to the strips | |
323 | // Float_t xp=x*1.e+4,zp=z*1.e+4; // microns | |
324 | Float_t xp=x,zp=z; | |
325 | seg->GetPadTxz(xp,zp); | |
326 | ||
327 | Int_t k; | |
328 | //--------------------------------------------------------- | |
329 | // Pside | |
330 | //------------------------------------------------------------ | |
331 | k=0; | |
332 | ||
333 | // calculate drift time | |
334 | // y is the minimum path | |
335 | tdrift[0] = (y+(seg->Dy()*1.0E-4)/2)/GetDriftVelocity(0); | |
336 | ||
337 | w = xp; // P side strip number | |
338 | ||
339 | if((w<(-0.5)) || (w>(GetNStrips()-0.5))) { | |
340 | // this check rejects hits in regions not covered by strips | |
341 | // 0.5 takes into account boundaries | |
342 | if(GetDebug(4)) cout << "Dead SSD region, x,z="<<x<<","<<z<<endl; | |
343 | return; // There are dead region on the SSD sensitive volume!!! | |
344 | } // end if | |
345 | ||
346 | // sigma is the standard deviation of the diffusion gaussian | |
347 | if(tdrift[k]<0) return; | |
348 | ||
349 | sigma[k] = TMath::Sqrt(2*GetDiffConst(k)*tdrift[k]); | |
350 | sigma[k] /= (GetStripPitch()*1.0E-4); //units of Pitch | |
351 | ||
352 | if(sigma[k]==0.0) { | |
353 | Error("HitToDigit"," sigma[%d]=0",k); | |
354 | exit(0); | |
355 | } // end if | |
356 | ||
357 | par0[k] = pairs; | |
358 | // we integrate the diffusion gaussian from -3sigma to 3sigma | |
359 | inf[k] = w - 3*sigma[k]; // 3 sigma from the gaussian average | |
360 | sup[k] = w + 3*sigma[k]; // 3 sigma from the gaussian average | |
361 | // IntegrateGaussian does the actual | |
362 | // integration of diffusion gaussian | |
363 | IntegrateGaussian(k, par0[k], w, sigma[k], inf[k], sup[k],tav); | |
364 | ||
365 | //------------------------------------------------------ | |
366 | // end Pside | |
367 | //------------------------------------------------------- | |
368 | ||
369 | //------------------------------------------------------ | |
370 | // Nside | |
371 | //------------------------------------------------------- | |
372 | k=1; | |
373 | tdrift[1] = ((seg->Dy()*1.0E-4)/2-y)/GetDriftVelocity(1); | |
374 | ||
375 | //tang[k]=TMath::Tan(tang[k]); | |
376 | ||
377 | w = zp; // N side strip number | |
378 | ||
379 | if((w<(-0.5)) || (w>(GetNStrips()-0.5))) { | |
380 | // this check rejects hits in regions not covered by strips | |
381 | // 0.5 takes into account boundaries | |
382 | if(GetDebug(4)) cout << "Dead SSD region, x,z="<<x<<","<<z<<endl; | |
383 | return; // There are dead region on the SSD sensitive volume. | |
384 | } // end if | |
385 | ||
386 | // sigma is the standard deviation of the diffusion gaussian | |
387 | if(tdrift[k]<0) return; | |
388 | ||
389 | sigma[k] = TMath::Sqrt(2*GetDiffConst(k)*tdrift[k]); | |
390 | sigma[k] /= (GetStripPitch()*1.0E-4); //units of Pitch | |
391 | ||
392 | if(sigma[k]==0.0) { | |
393 | Error("HitToDigit"," sigma[%d]=0",k); | |
394 | exit(0); | |
395 | } // end if | |
396 | ||
397 | par0[k] = pairs; | |
398 | // we integrate the diffusion gaussian from -3sigma to 3sigma | |
399 | inf[k] = w - 3*sigma[k]; // 3 sigma from the gaussian average | |
400 | sup[k] = w + 3*sigma[k]; // 3 sigma from the gaussian average | |
401 | // IntegrateGaussian does the actual | |
402 | // integration of diffusion gaussian | |
403 | IntegrateGaussian(k, par0[k], w, sigma[k], inf[k], sup[k],tav); | |
404 | ||
405 | //------------------------------------------------- | |
406 | // end Nside | |
407 | //------------------------------------------------- | |
408 | ||
409 | ||
410 | } // end stepping | |
411 | } | |
412 | ||
413 | //______________________________________________________________________ | |
414 | void AliITSsimulationSSD::ApplyNoise(AliITSpList *pList,Int_t module){ | |
415 | // Apply Noise. | |
416 | Int_t ix; | |
417 | Double_t signal,noise; | |
418 | AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module); | |
419 | ||
420 | // Pside | |
421 | for(ix=0;ix<GetNStrips();ix++){ // loop over strips | |
422 | ||
423 | // noise is gaussian | |
424 | noise = (Double_t) gRandom->Gaus(0,res->GetNoiseP(ix)); | |
425 | ||
426 | // need to calibrate noise | |
427 | // NOTE. noise from the calibration database comes uncalibrated, | |
428 | // it needs to be calibrated in order to be added | |
429 | // to the signal. It will be decalibrated later on together with the noise | |
430 | noise *= (Double_t) res->GetGainP(ix); | |
431 | ||
432 | // noise comes in ADC channels from the calibration database | |
433 | // It needs to be converted back to electronVolts | |
434 | noise /= res->GetSSDDEvToADC(1.); | |
435 | ||
436 | // Finally, noise is added to the signal | |
437 | signal = noise + fMapA2->GetSignal(0,ix);//get signal from map | |
438 | fMapA2->SetHit(0,ix,signal); // give back signal to map | |
439 | if(signal>0.0) pList->AddNoise(0,ix,module,noise); | |
440 | } // loop over strip | |
441 | ||
442 | // Nside | |
443 | for(ix=0;ix<GetNStrips();ix++){ // loop over strips | |
444 | noise = (Double_t) gRandom->Gaus(0,res->GetNoiseN(ix));// give noise to signal | |
445 | noise *= (Double_t) res->GetGainN(ix); | |
446 | noise /= res->GetSSDDEvToADC(1.); | |
447 | signal = noise + fMapA2->GetSignal(1,ix);//get signal from map | |
448 | fMapA2->SetHit(1,ix,signal); // give back signal to map | |
449 | if(signal>0.0) pList->AddNoise(1,ix,module,noise); | |
450 | } // loop over strip | |
451 | ||
452 | } | |
453 | //______________________________________________________________________ | |
454 | void AliITSsimulationSSD::ApplyCoupling(AliITSpList *pList,Int_t module) { | |
455 | // Apply the effect of electronic coupling between channels | |
456 | Int_t ix; | |
457 | Double_t signal=0; | |
458 | //AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module); | |
459 | AliITSSimuParam* res = fDetType->GetSimuParam(); | |
460 | ||
461 | Double_t *contrLeft = new Double_t[GetNStrips()]; | |
462 | Double_t *contrRight = new Double_t[GetNStrips()]; | |
463 | ||
464 | // P side coupling | |
465 | for(ix=0;ix<GetNStrips();ix++){ | |
466 | if(ix>0) contrLeft[ix] = fMapA2->GetSignal(0,ix-1)*res->GetSSDCouplingPL(); | |
467 | else contrLeft[ix] = 0.0; | |
468 | if(ix<(GetNStrips()-1)) contrRight[ix] = fMapA2->GetSignal(0,ix+1)*res->GetSSDCouplingPR(); | |
469 | else contrRight[ix] = 0.0; | |
470 | } // loop over strips | |
471 | ||
472 | for(ix=0;ix<GetNStrips();ix++){ | |
473 | signal = contrLeft[ix] + contrRight[ix] - res->GetSSDCouplingPL() * fMapA2->GetSignal(0,ix) | |
474 | - res->GetSSDCouplingPR() * fMapA2->GetSignal(0,ix); | |
475 | fMapA2->AddSignal(0,ix,signal); | |
476 | if(signal>0.0) pList->AddNoise(0,ix,module,signal); | |
477 | } // loop over strips | |
478 | ||
479 | // N side coupling | |
480 | for(ix=0;ix<GetNStrips();ix++){ | |
481 | if(ix>0) contrLeft[ix] = fMapA2->GetSignal(1,ix-1)*res->GetSSDCouplingNL(); | |
482 | else contrLeft[ix] = 0.0; | |
483 | if(ix<(GetNStrips()-1)) contrRight[ix] = fMapA2->GetSignal(1,ix+1)*res->GetSSDCouplingNR(); | |
484 | else contrRight[ix] = 0.0; | |
485 | } // loop over strips | |
486 | ||
487 | for(ix=0;ix<GetNStrips();ix++){ | |
488 | signal = contrLeft[ix] + contrRight[ix] - res->GetSSDCouplingNL() * fMapA2->GetSignal(0,ix) | |
489 | - res->GetSSDCouplingNR() * fMapA2->GetSignal(0,ix); | |
490 | fMapA2->AddSignal(1,ix,signal); | |
491 | if(signal>0.0) pList->AddNoise(1,ix,module,signal); | |
492 | } // loop over strips | |
493 | ||
494 | ||
495 | delete [] contrLeft; | |
496 | delete [] contrRight; | |
497 | } | |
498 | ||
499 | //______________________________________________________________________ | |
500 | void AliITSsimulationSSD::ApplyDeadChannels(Int_t module) { | |
501 | // Kill dead channels setting gain to zero | |
502 | ||
503 | AliITSCalibrationSSD* res = (AliITSCalibrationSSD*)GetCalibrationModel(module); | |
504 | ||
505 | for(Int_t i=0;i<GetNStrips();i++){ | |
506 | ||
507 | if(res->IsPChannelBad(i)) res->SetGainP(i,0.0); | |
508 | if(res->IsNChannelBad(i)) res->SetGainN(i,0.0); | |
509 | ||
510 | } // loop over strips | |
511 | ||
512 | } | |
513 | ||
514 | //______________________________________________________________________ | |
515 | Float_t AliITSsimulationSSD::F(Float_t av, Float_t x, Float_t s) { | |
516 | // Computes the integral of a gaussian using Error Function | |
517 | Float_t sqrt2 = TMath::Sqrt(2.0); | |
518 | Float_t sigm2 = sqrt2*s; | |
519 | Float_t integral; | |
520 | ||
521 | integral = 0.5 * TMath::Erf( (x - av) / sigm2); | |
522 | return integral; | |
523 | } | |
524 | //______________________________________________________________________ | |
525 | void AliITSsimulationSSD::IntegrateGaussian(Int_t k,Double_t par, Double_t w, | |
526 | Double_t sigma, | |
527 | Double_t inf, Double_t sup, | |
528 | AliITSTableSSD *tav) { | |
529 | // integrate the diffusion gaussian | |
530 | // remind: inf and sup are w-3sigma and w+3sigma | |
531 | // we could define them here instead of passing them | |
532 | // this way we are free to introduce asimmetry | |
533 | ||
534 | Double_t a=0.0, b=0.0; | |
535 | Double_t dXCharge1 = 0.0, dXCharge2 = 0.0; | |
536 | // dXCharge1 and 2 are the charge to two neighbouring strips | |
537 | // Watch that we only involve at least two strips | |
538 | // Numbers greater than 2 of strips in a cluster depend on | |
539 | // geometry of the track and delta rays, not charge diffusion! | |
540 | ||
541 | Double_t strip = TMath::Floor(w); // closest strip on the left | |
542 | ||
543 | if ( TMath::Abs((strip - w)) < 0.5) { | |
544 | // gaussian mean is closer to strip on the left | |
545 | a = inf; // integration starting point | |
546 | if((strip+0.5)<=sup) { | |
547 | // this means that the tail of the gaussian goes beyond | |
548 | // the middle point between strips ---> part of the signal | |
549 | // is given to the strip on the right | |
550 | b = strip + 0.5; // integration stopping point | |
551 | dXCharge1 = F( w, b, sigma) - F(w, a, sigma); | |
552 | dXCharge2 = F( w, sup, sigma) - F(w ,b, sigma); | |
553 | }else { | |
554 | // this means that all the charge is given to the strip on the left | |
555 | b = sup; | |
556 | dXCharge1 = 0.9973; // gaussian integral at 3 sigmas | |
557 | dXCharge2 = 0.0; | |
558 | } // end if | |
559 | dXCharge1 = par * dXCharge1;// normalize by mean of number of carriers | |
560 | dXCharge2 = par * dXCharge2; | |
561 | ||
562 | // for the time being, signal is the charge | |
563 | // in ChargeToSignal signal is converted in ADC channel | |
564 | fMapA2->AddSignal(k,(Int_t)strip,dXCharge1); | |
565 | tav->Add(k,(Int_t)strip); | |
566 | if(((Int_t) strip) < (GetNStrips()-1)) { | |
567 | // strip doesn't have to be the last (remind: last=GetNStrips()-1) | |
568 | // otherwise part of the charge is lost | |
569 | fMapA2->AddSignal(k,((Int_t)strip+1),dXCharge2); | |
570 | tav->Add(k,((Int_t)(strip+1))); | |
571 | } // end if | |
572 | }else{ | |
573 | // gaussian mean is closer to strip on the right | |
574 | strip++; // move to strip on the rigth | |
575 | b = sup; // now you know where to stop integrating | |
576 | if((strip-0.5)>=inf) { | |
577 | // tail of diffusion gaussian on the left goes left of | |
578 | // middle point between strips | |
579 | a = strip - 0.5; // integration starting point | |
580 | dXCharge1 = F(w, b, sigma) - F(w, a, sigma); | |
581 | dXCharge2 = F(w, a, sigma) - F(w, inf, sigma); | |
582 | }else { | |
583 | a = inf; | |
584 | dXCharge1 = 0.9973; // gaussian integral at 3 sigmas | |
585 | dXCharge2 = 0.0; | |
586 | } // end if | |
587 | dXCharge1 = par * dXCharge1; // normalize by means of carriers | |
588 | dXCharge2 = par * dXCharge2; | |
589 | // for the time being, signal is the charge | |
590 | // in ChargeToSignal signal is converted in ADC channel | |
591 | fMapA2->AddSignal(k,(Int_t)strip,dXCharge1); | |
592 | tav->Add(k,(Int_t)strip); | |
593 | if(((Int_t) strip) > 0) { | |
594 | // strip doesn't have to be the first | |
595 | // otherwise part of the charge is lost | |
596 | fMapA2->AddSignal(k,((Int_t)strip-1),dXCharge2); | |
597 | tav->Add(k,((Int_t)(strip-1))); | |
598 | } // end if | |
599 | } // end if | |
600 | } | |
601 | //______________________________________________________________________ | |
602 | Int_t AliITSsimulationSSD::NumOfSteps(Double_t x, Double_t y, Double_t z, | |
603 | Double_t &dex,Double_t &dey, | |
604 | Double_t &dez){ | |
605 | // number of steps | |
606 | // it also returns steps for each coord | |
607 | //AliITSsegmentationSSD *seg = new AliITSsegmentationSSD(); | |
608 | ||
609 | Double_t step = 25E-4; | |
610 | //step = (Double_t) seg->GetStepSize(); // step size (cm) | |
611 | Int_t numOfSteps = (Int_t) (TMath::Sqrt(x*x+y*y+z*z)/step); | |
612 | ||
613 | if (numOfSteps < 1) numOfSteps = 1; // one step, at least | |
614 | //numOfSteps=1; | |
615 | ||
616 | // we could condition the stepping depending on the incident angle | |
617 | // of the track | |
618 | dex = x/numOfSteps; | |
619 | dey = y/numOfSteps; | |
620 | dez = z/numOfSteps; | |
621 | ||
622 | return numOfSteps; | |
623 | } | |
624 | //---------------------------------------------------------------------- | |
625 | void AliITSsimulationSSD::GetList(Int_t label,Int_t hit,Int_t mod, | |
626 | AliITSpList *pList,AliITSTableSSD *tav) { | |
627 | // loop over nonzero digits | |
628 | Int_t ix,i; | |
629 | Double_t signal=0.; | |
630 | ||
631 | for(Int_t k=0; k<2; k++) { | |
632 | ix=tav->Use(k); | |
633 | while(ix>-1){ | |
634 | signal = fMapA2->GetSignal(k,ix); | |
635 | if(signal==0.0) { | |
636 | ix=tav->Use(k); | |
637 | continue; | |
638 | } // end if signal==0.0 | |
639 | // check the signal magnitude | |
640 | for(i=0;i<pList->GetNSignals(k,ix);i++){ | |
641 | signal -= pList->GetTSignal(k,ix,i); | |
642 | } // end for i | |
643 | // compare the new signal with already existing list | |
644 | if(signal>0)pList->AddSignal(k,ix,label,hit,mod,signal); | |
645 | ix=tav->Use(k); | |
646 | } // end of loop on strips | |
647 | } // end of loop on P/N side | |
648 | tav->Clear(); | |
649 | } | |
650 | //---------------------------------------------------------------------- | |
651 | void AliITSsimulationSSD::ChargeToSignal(Int_t module,AliITSpList *pList) { | |
652 | // charge to signal | |
653 | static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); | |
654 | Float_t threshold = 0.; | |
655 | Int_t size = AliITSdigitSSD::GetNTracks(); | |
656 | Int_t * digits = new Int_t[size]; | |
657 | Int_t * tracks = new Int_t[size]; | |
658 | Int_t * hits = new Int_t[size]; | |
659 | Int_t j1; | |
660 | Float_t charges[3] = {0.0,0.0,0.0}; | |
661 | Float_t signal; | |
662 | AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module); | |
663 | AliITSSimuParam* simpar = fDetType->GetSimuParam(); | |
664 | ||
665 | for(Int_t k=0;k<2;k++){ // both sides (0=Pside, 1=Nside) | |
666 | for(Int_t ix=0;ix<GetNStrips();ix++){ // loop over strips | |
667 | ||
668 | // if strip is dead -> gain=0 | |
669 | if( ((k==0)&&(res->GetGainP(ix)==0)) || ((k==1)&&(res->GetGainN(ix)==0))) continue; | |
670 | ||
671 | signal = fMapA2->GetSignal(k,ix); | |
672 | // signal has to be uncalibrated | |
673 | // In real life, gains are supposed to be calculated from calibration runs, | |
674 | // stored in the calibration DB and used in the reconstruction | |
675 | // (see AliITSClusterFinderSSD.cxx) | |
676 | if(k==0) signal /= res->GetGainP(ix); | |
677 | else signal /= res->GetGainN(ix); | |
678 | ||
679 | // signal is converted in unit of ADC | |
680 | signal = res->GetSSDDEvToADC(signal); | |
681 | if(signal>4095.) signal = 4095.;//if exceeding, accumulate last one | |
682 | ||
683 | // threshold for zero suppression is set on the basis of the noise | |
684 | // A good value is 3*sigma_noise | |
685 | if(k==0) threshold = res->GetNoiseP(ix); | |
686 | else threshold = res->GetNoiseN(ix); | |
687 | ||
688 | threshold *= simpar->GetSSDZSThreshold(); // threshold at 3 sigma noise | |
689 | ||
690 | if(signal < threshold) continue; | |
691 | //cout<<signal<<" "<<threshold<<endl; | |
692 | ||
693 | digits[0] = k; | |
694 | digits[1] = ix; | |
695 | digits[2] = TMath::Nint(signal); | |
696 | for(j1=0;j1<size;j1++)if(j1<pList->GetNEntries()){ | |
697 | // only three in digit. | |
698 | tracks[j1] = pList->GetTrack(k,ix,j1); | |
699 | hits[j1] = pList->GetHit(k,ix,j1); | |
700 | }else{ | |
701 | tracks[j1] = -3; | |
702 | hits[j1] = -1; | |
703 | } // end for j1 | |
704 | // finally add digit | |
705 | aliITS->AddSimDigit(2,0,digits,tracks,hits,charges); | |
706 | } // end for ix | |
707 | } // end for k | |
708 | delete [] digits; | |
709 | delete [] tracks; | |
710 | delete [] hits; | |
711 | } | |
712 | //______________________________________________________________________ | |
713 | void AliITSsimulationSSD::WriteSDigits(AliITSpList *pList){ | |
714 | // Fills the Summable digits Tree | |
715 | Int_t i,ni,j,nj; | |
716 | static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); | |
717 | ||
718 | pList->GetMaxMapIndex(ni,nj); | |
719 | for(i=0;i<ni;i++)for(j=0;j<nj;j++){ | |
720 | if(pList->GetSignalOnly(i,j)>0.0){ | |
721 | aliITS->AddSumDigit(*(pList->GetpListItem(i,j))); | |
722 | if(GetDebug(4)) cout << "pListSSD: "<<*(pList->GetpListItem(i,j)) | |
723 | << endl; | |
724 | } // end if | |
725 | } // end for i,j | |
726 | return; | |
727 | } | |
728 | //______________________________________________________________________ | |
729 | void AliITSsimulationSSD::FillMapFrompList(AliITSpList *pList){ | |
730 | // Fills fMap2A from the pList of Summable digits | |
731 | Int_t k,ix; | |
732 | ||
733 | for(k=0;k<2;k++)for(ix=0;ix<GetNStrips();ix++) | |
734 | fMapA2->AddSignal(k,ix,pList->GetSignal(k,ix)); | |
735 | return; | |
736 | } | |
737 | //______________________________________________________________________ | |
738 | void AliITSsimulationSSD::Print(ostream *os){ | |
739 | //Standard output format for this class | |
740 | ||
741 | //AliITSsimulation::Print(os); | |
742 | *os << fIonE <<","; | |
743 | *os << fDifConst[0] <<","<< fDifConst[1] <<","; | |
744 | *os << fDriftVel[0] <<","<< fDriftVel[1]; | |
745 | //*os <<","; fDCS->Print(os); | |
746 | //*os <<","; fMapA2->Print(os); | |
747 | } | |
748 | //______________________________________________________________________ | |
749 | void AliITSsimulationSSD::Read(istream *is){ | |
750 | // Standard output streaming function. | |
751 | ||
752 | //AliITSsimulation::Read(is); | |
753 | *is >> fIonE; | |
754 | *is >> fDifConst[0] >> fDifConst[1]; | |
755 | *is >> fDriftVel[0] >> fDriftVel[1]; | |
756 | //fDCS->Read(is); | |
757 | //fMapA2->Read(is); | |
758 | } | |
759 | //______________________________________________________________________ | |
760 | ostream &operator<<(ostream &os,AliITSsimulationSSD &source){ | |
761 | // Standard output streaming function. | |
762 | ||
763 | source.Print(&os); | |
764 | return os; | |
765 | } | |
766 | //______________________________________________________________________ | |
767 | istream &operator>>(istream &os,AliITSsimulationSSD &source){ | |
768 | // Standard output streaming function. | |
769 | ||
770 | source.Read(&os); | |
771 | return os; | |
772 | } | |
773 | //______________________________________________________________________ | |
774 | ||
775 | ||
776 |