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57817f7c | 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 | **************************************************************************/ | |
88cb7938 | 15 | |
57817f7c | 16 | /* $Id$ */ |
17 | ||
b0f5e3fc | 18 | #include <stdio.h> |
8a00af9a | 19 | #include <stdlib.h> |
4ae5bbc4 | 20 | #include <Riostream.h> |
b0f5e3fc | 21 | #include <TObjArray.h> |
fd61217e | 22 | #include "AliITSmodule.h" |
57817f7c | 23 | #include "AliITSMapA2.h" |
c7a4dac0 | 24 | #include "AliITSpList.h" |
fcf95fc7 | 25 | #include "AliITSCalibrationSSD.h" |
c7a4dac0 | 26 | #include "AliITSsegmentationSSD.h" |
b0f5e3fc | 27 | #include "AliITSdcsSSD.h" |
28 | #include "AliITS.h" | |
3a97c582 | 29 | #include "AliITShit.h" |
e869281d | 30 | #include "AliITSdigitSSD.h" |
b0f5e3fc | 31 | #include "AliRun.h" |
0315d466 | 32 | #include "AliITSgeom.h" |
57817f7c | 33 | #include "AliITSsimulationSSD.h" |
84541af4 | 34 | #include "AliITSTableSSD.h" |
fcf95fc7 | 35 | #include "AliITSresponseSSD.h" |
b0f5e3fc | 36 | |
925e6570 | 37 | ClassImp(AliITSsimulationSSD) |
fd61217e | 38 | //////////////////////////////////////////////////////////////////////// |
8ba39da9 | 39 | // Version: 0 // |
40 | // Written by Enrico Fragiacomo // | |
41 | // July 2000 // | |
42 | // // | |
43 | // AliITSsimulationSSD is the simulation of SSDs. // | |
44 | //////////////////////////////////////////////////////////////////////// | |
fd61217e | 45 | |
57817f7c | 46 | //---------------------------------------------------------------------- |
aacedc3e | 47 | AliITSsimulationSSD::AliITSsimulationSSD():AliITSsimulation(), |
48 | fDCS(0), | |
49 | fMapA2(0), | |
50 | fIonE(0.0), | |
51 | fDifConst(), | |
52 | fDriftVel(){ | |
53 | //default Constructor | |
54 | //Inputs: | |
55 | // none. | |
56 | // Outputs: | |
57 | // none. | |
58 | // Return: | |
59 | // A default construction AliITSsimulationSSD class | |
57817f7c | 60 | } |
0315d466 | 61 | //---------------------------------------------------------------------- |
8ba39da9 | 62 | AliITSsimulationSSD::AliITSsimulationSSD(AliITSDetTypeSim* dettyp): |
63 | AliITSsimulation(dettyp), | |
aacedc3e | 64 | fDCS(0), |
65 | fMapA2(0), | |
66 | fIonE(0.0), | |
67 | fDifConst(), | |
68 | fDriftVel(){ | |
3a97c582 | 69 | // Constructor |
70 | // Input: | |
71 | // AliITSsegmentationSSD *seg Pointer to the SSD segmentation to be used | |
fcf95fc7 | 72 | // AliITSCalibrationSSD *resp Pointer to the SSD responce class to be used |
3a97c582 | 73 | // Outputs: |
74 | // none. | |
75 | // Return | |
aacedc3e | 76 | // A standard constructed AliITSsimulationSSD class |
3a97c582 | 77 | |
aacedc3e | 78 | Init(); |
c7a4dac0 | 79 | } |
80 | //---------------------------------------------------------------------- | |
aacedc3e | 81 | void AliITSsimulationSSD::Init(){ |
3a97c582 | 82 | // Inilizer, Inilizes all of the variable as needed in a standard place. |
83 | // Input: | |
84 | // AliITSsegmentationSSD *seg Pointer to the SSD segmentation to be used | |
fcf95fc7 | 85 | // AliITSCalibrationSSD *resp Pointer to the SSD responce class to be used |
3a97c582 | 86 | // Outputs: |
87 | // none. | |
88 | // Return | |
89 | // none. | |
fcf95fc7 | 90 | AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(fDetType->GetITSgeom()->GetStartSSD()); |
8ba39da9 | 91 | AliITSsegmentationSSD* seg = (AliITSsegmentationSSD*)GetSegmentationModel(2); |
aacedc3e | 92 | Double_t noise[2] = {0.,0.}; |
8ba39da9 | 93 | res->GetNoiseParam(noise[0],noise[1]); // retrieves noise parameters |
94 | fDCS = new AliITSdcsSSD(seg,res); | |
3a97c582 | 95 | |
96 | SetDriftVelocity(); // use default values in .h file | |
97 | SetIonizeE(); // use default values in .h file | |
98 | SetDiffConst(); // use default values in .h file | |
99 | fpList = new AliITSpList(2,GetNStrips()); | |
8ba39da9 | 100 | fMapA2 = new AliITSMapA2(seg); |
b0f5e3fc | 101 | } |
0315d466 | 102 | //______________________________________________________________________ |
57817f7c | 103 | AliITSsimulationSSD& AliITSsimulationSSD::operator=( |
3a97c582 | 104 | const AliITSsimulationSSD &s){ |
84541af4 | 105 | // Operator = |
106 | ||
107 | if(this==&s) return *this; | |
108 | ||
109 | this->fDCS = new AliITSdcsSSD(*(s.fDCS)); | |
110 | this->fMapA2 = s.fMapA2; | |
111 | this->fIonE = s.fIonE; | |
112 | this->fDifConst[0] = s.fDifConst[0]; | |
113 | this->fDifConst[1] = s.fDifConst[1]; | |
114 | this->fDriftVel[0] = s.fDriftVel[0]; | |
115 | this->fDriftVel[1] = s.fDriftVel[1]; | |
116 | return *this; | |
b0f5e3fc | 117 | } |
57817f7c | 118 | //______________________________________________________________________ |
5402d9ca | 119 | AliITSsimulation& AliITSsimulationSSD::operator=( |
d2f55a22 | 120 | const AliITSsimulation &s){ |
121 | // Operator = | |
122 | ||
123 | if(this==&s) return *this; | |
124 | Error("AliITSsimulationSSD","Not allowed to make a = with " | |
125 | "AliITSsimulationSSD Using default creater instead"); | |
126 | ||
127 | return *this; | |
128 | } | |
129 | //______________________________________________________________________ | |
ac74f489 | 130 | AliITSsimulationSSD::AliITSsimulationSSD(const AliITSsimulationSSD &source): |
131 | AliITSsimulation(source){ | |
84541af4 | 132 | // copy constructor |
fd61217e | 133 | |
84541af4 | 134 | *this = source; |
b0f5e3fc | 135 | } |
0315d466 | 136 | //______________________________________________________________________ |
b0f5e3fc | 137 | AliITSsimulationSSD::~AliITSsimulationSSD() { |
84541af4 | 138 | // destructor |
139 | delete fMapA2; | |
140 | delete fDCS; | |
0315d466 | 141 | } |
57817f7c | 142 | //______________________________________________________________________ |
3a97c582 | 143 | void AliITSsimulationSSD::InitSimulationModule(Int_t module,Int_t event){ |
144 | // Creates maps to build the list of tracks for each sumable digit | |
145 | // Inputs: | |
146 | // Int_t module // Module number to be simulated | |
147 | // Int_t event // Event number to be simulated | |
148 | // Outputs: | |
149 | // none. | |
150 | // Return | |
151 | // none. | |
152 | ||
aacedc3e | 153 | SetModuleNumber(module); |
154 | SetEventNumber(event); | |
3a97c582 | 155 | fMapA2->ClearMap(); |
156 | fpList->ClearMap(); | |
157 | } | |
158 | //______________________________________________________________________ | |
159 | void AliITSsimulationSSD::FinishSDigitiseModule(){ | |
160 | // Does the Sdigits to Digits work | |
161 | // Inputs: | |
162 | // none. | |
163 | // Outputs: | |
164 | // none. | |
165 | // Return: | |
166 | // none. | |
167 | ||
168 | FillMapFrompList(fpList); // need to check if needed here or not???? | |
169 | SDigitToDigit(fModule,fpList); | |
170 | fpList->ClearMap(); | |
171 | fMapA2->ClearMap(); | |
172 | } | |
173 | //______________________________________________________________________ | |
aacedc3e | 174 | void AliITSsimulationSSD::DigitiseModule(AliITSmodule *mod,Int_t,Int_t) { |
84541af4 | 175 | // Digitizes hits for one SSD module |
aacedc3e | 176 | SetModuleNumber(mod->GetIndex()); |
0315d466 | 177 | |
3a97c582 | 178 | HitsToAnalogDigits(mod,fpList); |
aacedc3e | 179 | SDigitToDigit(GetModuleNumber(),fpList); |
0315d466 | 180 | |
3a97c582 | 181 | fpList->ClearMap(); |
84541af4 | 182 | fMapA2->ClearMap(); |
c7a4dac0 | 183 | } |
184 | //______________________________________________________________________ | |
aacedc3e | 185 | void AliITSsimulationSSD::SDigitiseModule(AliITSmodule *mod,Int_t,Int_t) { |
3a97c582 | 186 | // Produces Summable/Analog digits and writes them to the SDigit tree. |
c7a4dac0 | 187 | |
ac74f489 | 188 | HitsToAnalogDigits(mod,fpList); |
c7a4dac0 | 189 | |
ac74f489 | 190 | WriteSDigits(fpList); |
c7a4dac0 | 191 | |
ac74f489 | 192 | fpList->ClearMap(); |
193 | fMapA2->ClearMap(); | |
c7a4dac0 | 194 | } |
195 | //______________________________________________________________________ | |
196 | void AliITSsimulationSSD::SDigitToDigit(Int_t module,AliITSpList *pList){ | |
84541af4 | 197 | // Takes the pList and finishes the digitization. |
c7a4dac0 | 198 | |
84541af4 | 199 | ApplyNoise(pList,module); |
200 | ApplyCoupling(pList,module); | |
c7a4dac0 | 201 | |
8ba39da9 | 202 | ChargeToSignal(module,pList); |
c7a4dac0 | 203 | } |
204 | //______________________________________________________________________ | |
205 | void AliITSsimulationSSD::HitsToAnalogDigits(AliITSmodule *mod, | |
84541af4 | 206 | AliITSpList *pList){ |
3a97c582 | 207 | // Loops over all hits to produce Analog/floating point digits. This |
208 | // is also the first task in producing standard digits. | |
209 | Int_t lasttrack = -2; | |
210 | Int_t idtrack = -2; | |
211 | Double_t x0=0.0, y0=0.0, z0=0.0; | |
212 | Double_t x1=0.0, y1=0.0, z1=0.0; | |
213 | Double_t de=0.0; | |
214 | Int_t module = mod->GetIndex(); | |
215 | ||
8ba39da9 | 216 | AliITSsegmentationSSD* seg = (AliITSsegmentationSSD*)GetSegmentationModel(2); |
217 | ||
3a97c582 | 218 | TObjArray *hits = mod->GetHits(); |
219 | Int_t nhits = hits->GetEntriesFast(); | |
220 | if (nhits<=0) return; | |
221 | AliITSTableSSD * tav = new AliITSTableSSD(GetNStrips()); | |
222 | module = mod->GetIndex(); | |
8ba39da9 | 223 | if ( mod->GetLayer() == 6 ) seg->SetLayer(6); |
224 | if ( mod->GetLayer() == 5 ) seg->SetLayer(5); | |
3a97c582 | 225 | for(Int_t i=0; i<nhits; i++) { |
aacedc3e | 226 | // LineSegmentL returns 0 if the hit is entering |
227 | // If hits is exiting returns positions of entering and exiting hits | |
228 | // Returns also energy loss | |
229 | if(GetDebug(4)){ | |
230 | cout << i << " "; | |
231 | cout << mod->GetHit(i)->GetXL() << " "<<mod->GetHit(i)->GetYL(); | |
232 | cout << " " << mod->GetHit(i)->GetZL(); | |
233 | cout << endl; | |
234 | } // end if | |
235 | if (mod->LineSegmentL(i, x0, x1, y0, y1, z0, z1, de, idtrack)) { | |
236 | HitToDigit(module, x0, y0, z0, x1, y1, z1, de,tav); | |
237 | if (lasttrack != idtrack || i==(nhits-1)) { | |
238 | GetList(idtrack,i,module,pList,tav); | |
239 | } // end if | |
240 | lasttrack=idtrack; | |
241 | } // end if | |
3a97c582 | 242 | } // end loop over hits |
243 | delete tav; tav=0; | |
244 | return; | |
b0f5e3fc | 245 | } |
0315d466 | 246 | //---------------------------------------------------------------------- |
fd61217e | 247 | void AliITSsimulationSSD::HitToDigit(Int_t module, Double_t x0, Double_t y0, |
84541af4 | 248 | Double_t z0, Double_t x1, Double_t y1, |
249 | Double_t z1, Double_t de, | |
250 | AliITSTableSSD *tav) { | |
8ba39da9 | 251 | |
252 | // hit to digit conversion | |
253 | ||
254 | AliITSsegmentationSSD* seg = (AliITSsegmentationSSD*)GetSegmentationModel(2); | |
3a97c582 | 255 | // Turns hits in SSD module into one or more digits. |
256 | Float_t tang[2] = {0.0,0.0}; | |
8ba39da9 | 257 | seg->Angles(tang[0], tang[1]);//stereo<<->tan(stereo)~=stereo |
3a97c582 | 258 | Double_t x, y, z; |
259 | Double_t dex=0.0, dey=0.0, dez=0.0; | |
260 | Double_t pairs; // pair generation energy per step. | |
261 | Double_t sigma[2] = {0.,0.};// standard deviation of the diffusion gaussian | |
262 | Double_t tdrift[2] = {0.,0.}; // time of drift | |
263 | Double_t w; | |
264 | Double_t inf[2], sup[2], par0[2]; | |
265 | ||
266 | // Steps in the module are determined "manually" (i.e. No Geant) | |
267 | // NumOfSteps divide path between entering and exiting hits in steps | |
268 | Int_t numOfSteps = NumOfSteps(x1, y1, z1, dex, dey, dez); | |
269 | // Enery loss is equally distributed among steps | |
270 | de = de/numOfSteps; | |
271 | pairs = de/GetIonizeE(); // e-h pairs generated | |
272 | for(Int_t j=0; j<numOfSteps; j++) { // stepping | |
aacedc3e | 273 | x = x0 + (j+0.5)*dex; |
274 | y = y0 + (j+0.5)*dey; | |
8ba39da9 | 275 | if ( y > (seg->Dy()/2+10)*1.0E-4 ) { |
aacedc3e | 276 | // check if particle is within the detector |
277 | Warning("HitToDigit", | |
278 | "hit out of detector y0=%e,y=%e,dey=%e,j =%e module=%d", | |
279 | y0,y,dey,j,module); | |
280 | return; | |
281 | } // end if | |
282 | z = z0 + (j+0.5)*dez; | |
283 | if(GetDebug(4)) cout <<"HitToDigit "<<x<<" "<<y<<" "<<z<< " " | |
284 | <<dex<<" "<<dey<<" "<<dez<<endl; | |
285 | // calculate drift time | |
286 | // y is the minimum path | |
8ba39da9 | 287 | tdrift[0] = (y+(seg->Dy()*1.0E-4)/2)/GetDriftVelocity(0); |
288 | tdrift[1] = ((seg->Dy()*1.0E-4)/2-y)/GetDriftVelocity(1); | |
aacedc3e | 289 | |
290 | for(Int_t k=0; k<2; k++) { // both sides remember: 0=Pside 1=Nside | |
291 | ||
292 | tang[k]=TMath::Tan(tang[k]); | |
293 | ||
294 | // w is the coord. perpendicular to the strips | |
295 | /* | |
296 | if(k==0) { | |
297 | w = (x+(GetSegmentation()->Dx()*1.0E-4)/2) - | |
3a97c582 | 298 | (z+(GetSegmentation()->Dz()*1.0E-4)/2)*tang[k]; |
aacedc3e | 299 | }else{ |
300 | w = (x+(GetSegmentation()->Dx()*1.0E-4)/2) + | |
3a97c582 | 301 | (z-(GetSegmentation()->Dz()*1.0E-4)/2)*tang[k]; |
aacedc3e | 302 | } // end if |
303 | w /= (GetStripPitch()*1.0E-4); //w is converted in units of pitch | |
304 | */ | |
305 | { // replacement block for the above. | |
306 | Float_t xp=x*1.e+4,zp=z*1.e+4; // microns | |
8ba39da9 | 307 | seg->GetPadTxz(xp,zp); |
aacedc3e | 308 | if(k==0) w = xp; // P side strip number |
309 | else w = zp; // N side strip number | |
310 | } // end test block | |
311 | ||
312 | if((w<(-0.5)) || (w>(GetNStrips()-0.5))) { | |
313 | // this check rejects hits in regions not covered by strips | |
314 | // 0.5 takes into account boundaries | |
315 | if(GetDebug(4)) cout << "x,z="<<x<<","<<z<<" w="<<w | |
316 | <<" Nstrips="<<GetNStrips()<<endl; | |
317 | return; // There are dead region on the SSD sensitive volume. | |
318 | } // end if | |
319 | ||
320 | // sigma is the standard deviation of the diffusion gaussian | |
321 | if(tdrift[k]<0) return; | |
322 | sigma[k] = TMath::Sqrt(2*GetDiffConst(k)*tdrift[k]); | |
323 | sigma[k] /= (GetStripPitch()*1.0E-4); //units of Pitch | |
324 | if(sigma[k]==0.0) { | |
325 | Error("HitToDigit"," sigma[%d]=0",k); | |
326 | exit(0); | |
327 | } // end if | |
328 | ||
329 | par0[k] = pairs; | |
330 | // we integrate the diffusion gaussian from -3sigma to 3sigma | |
331 | inf[k] = w - 3*sigma[k]; // 3 sigma from the gaussian average | |
332 | sup[k] = w + 3*sigma[k]; // 3 sigma from the gaussian average | |
333 | // IntegrateGaussian does the actual | |
334 | // integration of diffusion gaussian | |
335 | IntegrateGaussian(k, par0[k], w, sigma[k], inf[k], sup[k],tav); | |
336 | } // end for loop over side (0=Pside, 1=Nside) | |
3a97c582 | 337 | } // end stepping |
b0f5e3fc | 338 | } |
57817f7c | 339 | //______________________________________________________________________ |
c7a4dac0 | 340 | void AliITSsimulationSSD::ApplyNoise(AliITSpList *pList,Int_t module){ |
aacedc3e | 341 | // Apply Noise. |
342 | Int_t k,ix; | |
343 | Double_t signal,noise; | |
344 | Double_t noiseP[2] = {0.,0.}; | |
345 | Double_t a,b; | |
fcf95fc7 | 346 | AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module); |
8ba39da9 | 347 | res->GetNoiseParam(a,b); // retrieves noise parameters |
aacedc3e | 348 | noiseP[0] = a; noiseP[1] = b; |
349 | for(k=0;k<2;k++){ // both sides (0=Pside, 1=Nside) | |
350 | for(ix=0;ix<GetNStrips();ix++){ // loop over strips | |
351 | noise = gRandom->Gaus(0,noiseP[k]);// get noise to signal | |
352 | signal = noise + fMapA2->GetSignal(k,ix);//get signal from map | |
353 | if(signal<0.) signal=0.0; // in case noise is negative... | |
354 | fMapA2->SetHit(k,ix,signal); // give back signal to map | |
355 | if(signal>0.0) pList->AddNoise(k,ix,module,noise); | |
356 | } // loop over strip | |
357 | } // loop over k (P or N side) | |
b0f5e3fc | 358 | } |
0315d466 | 359 | //______________________________________________________________________ |
c7a4dac0 | 360 | void AliITSsimulationSSD::ApplyCoupling(AliITSpList *pList,Int_t module) { |
aacedc3e | 361 | // Apply the effect of electronic coupling between channels |
362 | Int_t ix; | |
363 | Double_t signalLeft=0, signalRight=0,signal=0; | |
364 | ||
365 | for(ix=0;ix<GetNStrips();ix++){ | |
366 | // P side coupling | |
367 | if(ix>0.)signalLeft = fMapA2->GetSignal(0,ix-1)*fDCS->GetCouplingPL(); | |
368 | else signalLeft = 0.0; | |
369 | if(ix<(GetNStrips()-1)) signalRight = fMapA2->GetSignal(0,ix+1)* | |
370 | fDCS->GetCouplingPR(); | |
371 | else signalRight = 0.0; | |
372 | signal = signalLeft + signalRight; | |
373 | fMapA2->AddSignal(0,ix,signal); | |
374 | if(signal>0.0) pList->AddNoise(0,ix,module,signal); | |
375 | ||
376 | signalLeft = signalRight = signal = 0.0; | |
377 | // N side coupling | |
378 | if(ix>0.) signalLeft = fMapA2->GetSignal(1,ix-1)*fDCS->GetCouplingNL(); | |
379 | else signalLeft = 0.0; | |
380 | if(ix<(GetNStrips()-1)) signalRight = fMapA2->GetSignal(1,ix+1)* | |
381 | fDCS->GetCouplingNR(); | |
382 | else signalRight = 0.0; | |
383 | signal = signalLeft + signalRight; | |
384 | fMapA2->AddSignal(1,ix,signal); | |
385 | if(signal>0.0) pList->AddNoise(1,ix,module,signal); | |
386 | } // loop over strips | |
b0f5e3fc | 387 | } |
0315d466 | 388 | //______________________________________________________________________ |
fd61217e | 389 | Float_t AliITSsimulationSSD::F(Float_t av, Float_t x, Float_t s) { |
aacedc3e | 390 | // Computes the integral of a gaussian using Error Function |
391 | Float_t sqrt2 = TMath::Sqrt(2.0); | |
392 | Float_t sigm2 = sqrt2*s; | |
393 | Float_t integral; | |
fd61217e | 394 | |
aacedc3e | 395 | integral = 0.5 * TMath::Erf( (x - av) / sigm2); |
396 | return integral; | |
0315d466 | 397 | } |
398 | //______________________________________________________________________ | |
fd61217e | 399 | void AliITSsimulationSSD::IntegrateGaussian(Int_t k,Double_t par, Double_t w, |
84541af4 | 400 | Double_t sigma, |
401 | Double_t inf, Double_t sup, | |
402 | AliITSTableSSD *tav) { | |
aacedc3e | 403 | // integrate the diffusion gaussian |
404 | // remind: inf and sup are w-3sigma and w+3sigma | |
405 | // we could define them here instead of passing them | |
406 | // this way we are free to introduce asimmetry | |
407 | ||
408 | Double_t a=0.0, b=0.0; | |
409 | Double_t dXCharge1 = 0.0, dXCharge2 = 0.0; | |
410 | // dXCharge1 and 2 are the charge to two neighbouring strips | |
411 | // Watch that we only involve at least two strips | |
412 | // Numbers greater than 2 of strips in a cluster depend on | |
413 | // geometry of the track and delta rays, not charge diffusion! | |
414 | ||
415 | Double_t strip = TMath::Floor(w); // closest strip on the left | |
416 | ||
417 | if ( TMath::Abs((strip - w)) < 0.5) { | |
418 | // gaussian mean is closer to strip on the left | |
419 | a = inf; // integration starting point | |
420 | if((strip+0.5)<=sup) { | |
421 | // this means that the tail of the gaussian goes beyond | |
422 | // the middle point between strips ---> part of the signal | |
423 | // is given to the strip on the right | |
424 | b = strip + 0.5; // integration stopping point | |
425 | dXCharge1 = F( w, b, sigma) - F(w, a, sigma); | |
426 | dXCharge2 = F( w, sup, sigma) - F(w ,b, sigma); | |
427 | }else { | |
428 | // this means that all the charge is given to the strip on the left | |
429 | b = sup; | |
430 | dXCharge1 = 0.9973; // gaussian integral at 3 sigmas | |
431 | dXCharge2 = 0.0; | |
432 | } // end if | |
433 | dXCharge1 = par * dXCharge1;// normalize by mean of number of carriers | |
434 | dXCharge2 = par * dXCharge2; | |
435 | ||
436 | // for the time being, signal is the charge | |
437 | // in ChargeToSignal signal is converted in ADC channel | |
438 | fMapA2->AddSignal(k,(Int_t)strip,dXCharge1); | |
439 | tav->Add(k,(Int_t)strip); | |
440 | if(((Int_t) strip) < (GetNStrips()-1)) { | |
441 | // strip doesn't have to be the last (remind: last=GetNStrips()-1) | |
442 | // otherwise part of the charge is lost | |
443 | fMapA2->AddSignal(k,((Int_t)strip+1),dXCharge2); | |
444 | tav->Add(k,((Int_t)(strip+1))); | |
445 | } // end if | |
446 | }else{ | |
447 | // gaussian mean is closer to strip on the right | |
448 | strip++; // move to strip on the rigth | |
449 | b = sup; // now you know where to stop integrating | |
450 | if((strip-0.5)>=inf) { | |
451 | // tail of diffusion gaussian on the left goes left of | |
452 | // middle point between strips | |
453 | a = strip - 0.5; // integration starting point | |
454 | dXCharge1 = F(w, b, sigma) - F(w, a, sigma); | |
455 | dXCharge2 = F(w, a, sigma) - F(w, inf, sigma); | |
456 | }else { | |
457 | a = inf; | |
458 | dXCharge1 = 0.9973; // gaussian integral at 3 sigmas | |
459 | dXCharge2 = 0.0; | |
460 | } // end if | |
461 | dXCharge1 = par * dXCharge1; // normalize by means of carriers | |
462 | dXCharge2 = par * dXCharge2; | |
463 | // for the time being, signal is the charge | |
464 | // in ChargeToSignal signal is converted in ADC channel | |
465 | fMapA2->AddSignal(k,(Int_t)strip,dXCharge1); | |
466 | tav->Add(k,(Int_t)strip); | |
467 | if(((Int_t) strip) > 0) { | |
468 | // strip doesn't have to be the first | |
469 | // otherwise part of the charge is lost | |
470 | fMapA2->AddSignal(k,((Int_t)strip-1),dXCharge2); | |
471 | tav->Add(k,((Int_t)(strip-1))); | |
472 | } // end if | |
473 | } // end if | |
b0f5e3fc | 474 | } |
0315d466 | 475 | //______________________________________________________________________ |
fd61217e | 476 | Int_t AliITSsimulationSSD::NumOfSteps(Double_t x, Double_t y, Double_t z, |
aacedc3e | 477 | Double_t &dex,Double_t &dey, |
478 | Double_t &dez){ | |
479 | // number of steps | |
480 | // it also returns steps for each coord | |
481 | //AliITSsegmentationSSD *seg = new AliITSsegmentationSSD(); | |
482 | ||
483 | Double_t step = 25E-4; | |
484 | //step = (Double_t) seg->GetStepSize(); // step size (cm) | |
485 | Int_t numOfSteps = (Int_t) (TMath::Sqrt(x*x+y*y+z*z)/step); | |
486 | ||
487 | if (numOfSteps < 1) numOfSteps = 1; // one step, at least | |
488 | ||
489 | // we could condition the stepping depending on the incident angle | |
490 | // of the track | |
491 | dex = x/numOfSteps; | |
492 | dey = y/numOfSteps; | |
493 | dez = z/numOfSteps; | |
494 | ||
495 | return numOfSteps; | |
fd61217e | 496 | } |
0315d466 | 497 | //---------------------------------------------------------------------- |
c7a4dac0 | 498 | void AliITSsimulationSSD::GetList(Int_t label,Int_t hit,Int_t mod, |
84541af4 | 499 | AliITSpList *pList,AliITSTableSSD *tav) { |
aacedc3e | 500 | // loop over nonzero digits |
501 | Int_t ix,i; | |
502 | Double_t signal=0.; | |
503 | ||
504 | for(Int_t k=0; k<2; k++) { | |
84541af4 | 505 | ix=tav->Use(k); |
aacedc3e | 506 | while(ix>-1){ |
507 | signal = fMapA2->GetSignal(k,ix); | |
508 | if(signal==0.0) { | |
509 | ix=tav->Use(k); | |
510 | continue; | |
511 | } // end if signal==0.0 | |
512 | // check the signal magnitude | |
513 | for(i=0;i<pList->GetNSignals(k,ix);i++){ | |
514 | signal -= pList->GetTSignal(k,ix,i); | |
515 | } // end for i | |
516 | // compare the new signal with already existing list | |
517 | if(signal>0)pList->AddSignal(k,ix,label,hit,mod,signal); | |
518 | ix=tav->Use(k); | |
519 | } // end of loop on strips | |
520 | } // end of loop on P/N side | |
521 | tav->Clear(); | |
fd61217e | 522 | } |
0315d466 | 523 | //---------------------------------------------------------------------- |
8ba39da9 | 524 | void AliITSsimulationSSD::ChargeToSignal(Int_t module,AliITSpList *pList) { |
aacedc3e | 525 | // charge to signal |
526 | static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); | |
527 | Float_t threshold = 0.; | |
528 | Int_t size = AliITSdigitSSD::GetNTracks(); | |
529 | Int_t * digits = new Int_t[size]; | |
530 | Int_t * tracks = new Int_t[size]; | |
531 | Int_t * hits = new Int_t[size]; | |
532 | Int_t j1; | |
533 | Float_t charges[3] = {0.0,0.0,0.0}; | |
534 | Float_t signal; | |
535 | Double_t noise[2] = {0.,0.}; | |
fcf95fc7 | 536 | AliITSCalibrationSSD* res =(AliITSCalibrationSSD*)GetCalibrationModel(module); |
8ba39da9 | 537 | res->GetNoiseParam(noise[0],noise[1]); |
aacedc3e | 538 | |
539 | for(Int_t k=0;k<2;k++){ // both sides (0=Pside, 1=Nside) | |
540 | // Threshold for zero-suppression | |
fcf95fc7 | 541 | // It can be defined in AliITSCalibrationSSD |
aacedc3e | 542 | // threshold = (Float_t)GetResp()->MinVal(k); |
543 | // I prefer to think adjusting the threshold "manually", looking | |
544 | // at the scope, and considering noise standard deviation | |
545 | threshold = 4.0*noise[k]; // 4 times noise is a choice | |
546 | for(Int_t ix=0;ix<GetNStrips();ix++){ // loop over strips | |
547 | if(fMapA2->GetSignal(k,ix) <= threshold)continue; | |
548 | // convert to ADC signal | |
fcf95fc7 | 549 | signal = res->GetDEvToADC( |
aacedc3e | 550 | fMapA2->GetSignal(k,ix)); |
551 | if(signal>1024.) signal = 1024.;//if exceeding, accumulate last one | |
552 | digits[0] = k; | |
553 | digits[1] = ix; | |
554 | digits[2] = (Int_t) signal; | |
555 | for(j1=0;j1<size;j1++)if(j1<pList->GetNEnteries()){ | |
556 | // only three in digit. | |
557 | tracks[j1] = pList->GetTrack(k,ix,j1); | |
558 | hits[j1] = pList->GetHit(k,ix,j1); | |
559 | }else{ | |
560 | tracks[j1] = -3; | |
561 | hits[j1] = -1; | |
562 | } // end for j1 | |
563 | // finally add digit | |
564 | aliITS->AddSimDigit(2,0,digits,tracks,hits,charges); | |
565 | } // end for ix | |
566 | } // end for k | |
567 | delete [] digits; | |
568 | delete [] tracks; | |
569 | delete [] hits; | |
c7a4dac0 | 570 | } |
571 | //______________________________________________________________________ | |
572 | void AliITSsimulationSSD::WriteSDigits(AliITSpList *pList){ | |
aacedc3e | 573 | // Fills the Summable digits Tree |
574 | Int_t i,ni,j,nj; | |
575 | static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); | |
576 | ||
577 | pList->GetMaxMapIndex(ni,nj); | |
578 | for(i=0;i<ni;i++)for(j=0;j<nj;j++){ | |
579 | if(pList->GetSignalOnly(i,j)>0.0){ | |
580 | aliITS->AddSumDigit(*(pList->GetpListItem(i,j))); | |
581 | if(GetDebug(4)) cout << "pListSSD: "<<*(pList->GetpListItem(i,j)) | |
582 | << endl; | |
583 | } // end if | |
584 | } // end for i,j | |
84541af4 | 585 | return; |
c7a4dac0 | 586 | } |
587 | //______________________________________________________________________ | |
588 | void AliITSsimulationSSD::FillMapFrompList(AliITSpList *pList){ | |
aacedc3e | 589 | // Fills fMap2A from the pList of Summable digits |
590 | Int_t k,ix; | |
c7a4dac0 | 591 | |
aacedc3e | 592 | for(k=0;k<2;k++)for(ix=0;ix<GetNStrips();ix++) |
593 | fMapA2->AddSignal(k,ix,pList->GetSignal(k,ix)); | |
594 | return; | |
b0f5e3fc | 595 | } |
57817f7c | 596 | //______________________________________________________________________ |
597 | void AliITSsimulationSSD::Print(ostream *os){ | |
aacedc3e | 598 | //Standard output format for this class |
599 | ||
600 | //AliITSsimulation::Print(os); | |
601 | *os << fIonE <<","; | |
602 | *os << fDifConst[0] <<","<< fDifConst[1] <<","; | |
603 | *os << fDriftVel[0] <<","<< fDriftVel[1]; | |
604 | //*os <<","; fDCS->Print(os); | |
605 | //*os <<","; fMapA2->Print(os); | |
57817f7c | 606 | } |
607 | //______________________________________________________________________ | |
608 | void AliITSsimulationSSD::Read(istream *is){ | |
aacedc3e | 609 | // Standard output streaming function. |
610 | ||
611 | //AliITSsimulation::Read(is); | |
612 | *is >> fIonE; | |
613 | *is >> fDifConst[0] >> fDifConst[1]; | |
614 | *is >> fDriftVel[0] >> fDriftVel[1]; | |
615 | //fDCS->Read(is); | |
616 | //fMapA2->Read(is); | |
57817f7c | 617 | } |
618 | //______________________________________________________________________ | |
619 | ostream &operator<<(ostream &os,AliITSsimulationSSD &source){ | |
aacedc3e | 620 | // Standard output streaming function. |
57817f7c | 621 | |
aacedc3e | 622 | source.Print(&os); |
623 | return os; | |
57817f7c | 624 | } |
625 | //______________________________________________________________________ | |
626 | istream &operator>>(istream &os,AliITSsimulationSSD &source){ | |
aacedc3e | 627 | // Standard output streaming function. |
57817f7c | 628 | |
aacedc3e | 629 | source.Read(&os); |
630 | return os; | |
57817f7c | 631 | } |
c7a4dac0 | 632 | //______________________________________________________________________ |
84541af4 | 633 | |
634 | ||
635 | ||
636 | ||
637 |