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c7a4dac0 | 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 | $Log$ | |
bb6b39bf | 18 | Revision 1.17 2002/07/16 17:00:17 barbera |
19 | Fixes added to make the slow simulation running with the current HEAD (from M. Masera) | |
20 | ||
cf6105a4 | 21 | Revision 1.16 2002/06/19 16:02:22 hristov |
22 | Division by zero corrected | |
23 | ||
d709f420 | 24 | Revision 1.15 2002/03/15 17:32:14 nilsen |
25 | Reintroduced SDigitization, and Digitization from SDigits, along with | |
26 | functions InitSimulationModule, and FinishSDigitizModule. | |
27 | ||
3a97c582 | 28 | Revision 1.14 2001/11/23 13:04:07 barbera |
29 | Some protection added in case of high multiplicity | |
30 | ||
0fee5d51 | 31 | Revision 1.13 2001/11/13 11:13:24 barbera |
32 | A protection against tracks with the same entrance and exit has been made more strict | |
33 | ||
0cadf298 | 34 | Revision 1.12 2001/10/04 22:44:31 nilsen |
35 | Major changes in supppor of PreDigits (SDigits). Changes made with will make | |
36 | it easier to suppor expected changes in AliITSHit class. Added use of new | |
37 | class AliITSpList. Both SPD and SDD have added effects of Dead Channels. Both | |
38 | of these will require addtional work as data bases of detectors and the like | |
39 | are developed. | |
40 | ||
c7a4dac0 | 41 | */ |
b0f5e3fc | 42 | #include <iostream.h> |
43 | #include <TRandom.h> | |
44 | #include <TH1.h> | |
e8189707 | 45 | #include <TMath.h> |
9f033001 | 46 | #include <TString.h> |
47 | #include <TParticle.h> | |
e8189707 | 48 | |
b0f5e3fc | 49 | #include "AliRun.h" |
e8189707 | 50 | #include "AliITS.h" |
9f033001 | 51 | #include "AliITShit.h" |
52 | #include "AliITSdigit.h" | |
53 | #include "AliITSmodule.h" | |
21b825a4 | 54 | #include "AliITSMapA2.h" |
c7a4dac0 | 55 | #include "AliITSpList.h" |
b0f5e3fc | 56 | #include "AliITSsimulationSPD.h" |
9f033001 | 57 | #include "AliITSsegmentation.h" |
58 | #include "AliITSresponse.h" | |
c7a4dac0 | 59 | #include "AliITSsegmentationSPD.h" |
60 | #include "AliITSresponseSPD.h" | |
9f033001 | 61 | |
bb6b39bf | 62 | //#define DEBUG |
e8189707 | 63 | |
b0f5e3fc | 64 | ClassImp(AliITSsimulationSPD) |
65 | //////////////////////////////////////////////////////////////////////// | |
66 | // Version: 0 | |
21b825a4 | 67 | // Written by Rocco Caliandro |
68 | // from a model developed with T. Virgili and R.A. Fini | |
69 | // June 15 2000 | |
b0f5e3fc | 70 | // |
71 | // AliITSsimulationSPD is the simulation of SPDs | |
21b825a4 | 72 | // |
c7a4dac0 | 73 | //______________________________________________________________________ |
21b825a4 | 74 | AliITSsimulationSPD::AliITSsimulationSPD(){ |
c7a4dac0 | 75 | // Default constructor |
76 | ||
77 | fResponse = 0; | |
78 | fSegmentation = 0; | |
79 | fHis = 0; | |
80 | fMapA2 = 0; | |
3a97c582 | 81 | |
c7a4dac0 | 82 | /* |
83 | fThresh = 0.; | |
84 | fSigma = 0.; | |
85 | fCouplCol = 0.; | |
86 | fCouplRow = 0.; */ | |
b0f5e3fc | 87 | } |
c7a4dac0 | 88 | //______________________________________________________________________ |
89 | AliITSsimulationSPD::AliITSsimulationSPD(AliITSsegmentation *seg, | |
90 | AliITSresponse *resp) { | |
91 | // Standard constructor | |
92 | ||
93 | fResponse = 0; | |
94 | fSegmentation = 0; | |
95 | fHis = 0; | |
96 | fMapA2 = 0; | |
3a97c582 | 97 | |
c7a4dac0 | 98 | /* |
99 | fThresh = 0.; | |
100 | fSigma = 0.; | |
101 | fCouplCol = 0.; | |
102 | fCouplRow = 0.*/ | |
103 | Init((AliITSsegmentationSPD*)seg,(AliITSresponseSPD*)resp); | |
b0f5e3fc | 104 | } |
c7a4dac0 | 105 | //______________________________________________________________________ |
106 | void AliITSsimulationSPD::Init(AliITSsegmentationSPD *seg, | |
107 | AliITSresponseSPD *resp) { | |
108 | // Initilizes the variables of AliITSsimulation SPD. | |
109 | ||
110 | fHis = 0; | |
111 | fResponse = resp; | |
112 | fSegmentation = seg; | |
3a97c582 | 113 | fMapA2 = new AliITSMapA2(fSegmentation); |
114 | fpList = new AliITSpList(GetNPixelsZ()+1,GetNPixelsX()+1); | |
c7a4dac0 | 115 | /* |
116 | fResponse->Thresholds(fThresh,fSigma); | |
117 | fResponse->GetNoiseParam(fCouplCol,fCouplRow); | |
118 | fNPixelsZ = fSegmentation->Npz(); | |
119 | fNPixelsX = fSegmentation->Npx(); | |
120 | */ | |
121 | } | |
122 | //______________________________________________________________________ | |
b0f5e3fc | 123 | AliITSsimulationSPD::~AliITSsimulationSPD() { |
c7a4dac0 | 124 | // destructor |
b0f5e3fc | 125 | |
c7a4dac0 | 126 | delete fMapA2; |
3a97c582 | 127 | // delete fpList; |
b0f5e3fc | 128 | |
c7a4dac0 | 129 | if (fHis) { |
130 | fHis->Delete(); | |
131 | delete fHis; | |
132 | } // end if | |
b0f5e3fc | 133 | } |
c7a4dac0 | 134 | //______________________________________________________________________ |
b0f5e3fc | 135 | AliITSsimulationSPD::AliITSsimulationSPD(const AliITSsimulationSPD &source){ |
c7a4dac0 | 136 | // Copy Constructor |
137 | ||
138 | if(&source == this) return; | |
139 | ||
140 | this->fMapA2 = source.fMapA2; | |
141 | this->fHis = source.fHis; | |
142 | /* | |
143 | this->fThresh = source.fThresh; | |
144 | this->fSigma = source.fSigma; | |
145 | this->fCouplCol = source.fCouplCol; | |
146 | this->fCouplRow = source.fCouplRow; | |
147 | this->fNPixelsX = source.fNPixelsX; | |
148 | this->fNPixelsZ = source.fNPixelsZ; | |
149 | */ | |
150 | return; | |
b0f5e3fc | 151 | } |
c7a4dac0 | 152 | //______________________________________________________________________ |
153 | AliITSsimulationSPD& AliITSsimulationSPD::operator=(const AliITSsimulationSPD | |
154 | &source) { | |
155 | // Assignment operator | |
156 | ||
157 | if(&source == this) return *this; | |
158 | ||
159 | this->fMapA2 = source.fMapA2; | |
160 | this->fHis = source.fHis; | |
161 | /* | |
162 | this->fThresh = source.fThresh; | |
163 | this->fSigma = source.fSigma; | |
164 | this->fCouplCol = source.fCouplCol; | |
165 | this->fCouplRow = source.fCouplRow; | |
166 | this->fNPixelsX = source.fNPixelsX; | |
167 | this->fNPixelsZ = source.fNPixelsZ; | |
168 | */ | |
169 | return *this; | |
3a97c582 | 170 | } |
171 | //______________________________________________________________________ | |
172 | void AliITSsimulationSPD::InitSimulationModule(Int_t module,Int_t event){ | |
173 | // Creates maps to build the list of tracks for each sumable digit | |
174 | // Inputs: | |
175 | // Int_t module // Module number to be simulated | |
176 | // Int_t event // Event number to be simulated | |
177 | // Outputs: | |
178 | // none. | |
179 | // Return | |
180 | // none. | |
181 | ||
182 | fModule = module; | |
183 | fEvent = event; | |
184 | fMapA2->ClearMap(); | |
185 | fpList->ClearMap(); | |
186 | } | |
187 | //______________________________________________________________________ | |
188 | void AliITSsimulationSPD::FinishSDigitiseModule(){ | |
189 | // Does the Sdigits to Digits work | |
190 | // Inputs: | |
191 | // none. | |
192 | // Outputs: | |
193 | // none. | |
194 | // Return: | |
195 | // none. | |
196 | ||
197 | SDigitsToDigits(fModule,fpList); | |
c7a4dac0 | 198 | } |
199 | //______________________________________________________________________ | |
200 | void AliITSsimulationSPD::SDigitiseModule(AliITSmodule *mod, Int_t dummy0, | |
201 | Int_t dummy1) { | |
202 | // Sum digitize module | |
203 | if (!(mod->GetNhits())) return; // if module has no hits then no Sdigits. | |
204 | Int_t number = 10000; | |
205 | Int_t *frowpixel = new Int_t[number]; | |
206 | Int_t *fcolpixel = new Int_t[number]; | |
207 | Double_t *fenepixel = new Double_t[number]; | |
208 | ||
3a97c582 | 209 | fModule = mod->GetIndex(); |
210 | ||
c7a4dac0 | 211 | // Array of pointers to store the track index of the digits |
212 | // leave +1, otherwise pList crashes when col=256, row=192 | |
c7a4dac0 | 213 | |
3a97c582 | 214 | HitsToAnalogDigits(mod,frowpixel,fcolpixel,fenepixel,fpList); |
c7a4dac0 | 215 | |
3a97c582 | 216 | WriteSDigits(fpList); |
c7a4dac0 | 217 | |
218 | // clean memory | |
219 | delete[] frowpixel; | |
220 | delete[] fcolpixel; | |
221 | delete[] fenepixel; | |
222 | fMapA2->ClearMap(); | |
3a97c582 | 223 | fpList->ClearMap(); |
c7a4dac0 | 224 | } |
225 | //______________________________________________________________________ | |
226 | void AliITSsimulationSPD::DigitiseModule(AliITSmodule *mod, Int_t dummy0, | |
227 | Int_t dummy1) { | |
228 | // digitize module. Also need to digitize modules with only noise. | |
b0f5e3fc | 229 | |
c7a4dac0 | 230 | Int_t number = 10000; |
231 | Int_t *frowpixel = new Int_t[number]; | |
232 | Int_t *fcolpixel = new Int_t[number]; | |
233 | Double_t *fenepixel = new Double_t[number]; | |
b0f5e3fc | 234 | |
c7a4dac0 | 235 | // Array of pointers to store the track index of the digits |
3a97c582 | 236 | // leave +1, otherwise pList crashes when col=256, row=192 |
237 | fModule = mod->GetIndex(); | |
c7a4dac0 | 238 | // noise setting |
3a97c582 | 239 | SetFluctuations(fpList,fModule); |
b0f5e3fc | 240 | |
3a97c582 | 241 | HitsToAnalogDigits(mod,frowpixel,fcolpixel,fenepixel,fpList); |
21b825a4 | 242 | |
c7a4dac0 | 243 | // apply mask to SPD module |
244 | SetMask(); | |
21b825a4 | 245 | |
3a97c582 | 246 | CreateDigit(fModule,fpList); |
b0f5e3fc | 247 | |
c7a4dac0 | 248 | // clean memory |
249 | delete[] frowpixel; | |
250 | delete[] fcolpixel; | |
251 | delete[] fenepixel; | |
252 | fMapA2->ClearMap(); | |
3a97c582 | 253 | fpList->ClearMap(); |
21b825a4 | 254 | } |
c7a4dac0 | 255 | //______________________________________________________________________ |
256 | void AliITSsimulationSPD::SDigitsToDigits(Int_t module,AliITSpList *pList) { | |
257 | // sum digits to Digits. | |
bb6b39bf | 258 | |
259 | #ifdef DEBUG | |
260 | cout << "Entering AliITSsimulatinSPD::SDigitsToDigits for module="; | |
261 | cout << module << endl; | |
262 | #endif | |
3a97c582 | 263 | fModule = module; |
b0f5e3fc | 264 | |
c7a4dac0 | 265 | // noise setting |
266 | SetFluctuations(pList,module); | |
b0f5e3fc | 267 | |
3a97c582 | 268 | fMapA2->ClearMap(); // since noise is in pList aready. Zero Map so that |
269 | // noise is not doubled when calling FillMapFrompList. | |
270 | ||
271 | FillMapFrompList(pList); | |
272 | ||
c7a4dac0 | 273 | // apply mask to SPD module |
274 | SetMask(); | |
21b825a4 | 275 | |
c7a4dac0 | 276 | CreateDigit(module,pList); |
3a97c582 | 277 | |
278 | fMapA2->ClearMap(); | |
279 | pList->ClearMap(); | |
c7a4dac0 | 280 | } |
281 | //______________________________________________________________________ | |
282 | void AliITSsimulationSPD::UpdateMapSignal(Int_t row,Int_t col,Int_t trk, | |
283 | Int_t hit,Int_t mod,Double_t ene, | |
284 | AliITSpList *pList) { | |
285 | // updates the Map of signal, adding the energy (ene) released by | |
286 | // the current track | |
287 | ||
288 | fMapA2->AddSignal(row,col,ene); | |
289 | pList->AddSignal(row,col,trk,hit,mod,ene); | |
290 | } | |
291 | //______________________________________________________________________ | |
292 | void AliITSsimulationSPD::UpdateMapNoise(Int_t row,Int_t col,Int_t mod, | |
293 | Double_t ene,AliITSpList *pList) { | |
294 | // updates the Map of noise, adding the energy (ene) give my noise | |
21b825a4 | 295 | |
c7a4dac0 | 296 | fMapA2->AddSignal(row,col,ene); |
297 | pList->AddNoise(row,col,mod,ene); | |
298 | } | |
299 | //______________________________________________________________________ | |
300 | void AliITSsimulationSPD::HitsToAnalogDigits(AliITSmodule *mod, | |
301 | Int_t *frowpixel,Int_t *fcolpixel, | |
302 | Double_t *fenepixel, | |
303 | AliITSpList *pList) { | |
304 | // Loops over all hits to produce Analog/floting point digits. This | |
305 | // is also the first task in producing standard digits. | |
21b825a4 | 306 | |
c7a4dac0 | 307 | // loop over hits in the module |
308 | Int_t hitpos,nhits = mod->GetNhits(); | |
309 | for (hitpos=0;hitpos<nhits;hitpos++) { | |
310 | HitToDigit(mod,hitpos,frowpixel,fcolpixel,fenepixel,pList); | |
311 | }// end loop over digits | |
312 | } | |
313 | //______________________________________________________________________ | |
314 | void AliITSsimulationSPD::HitToDigit(AliITSmodule *mod,Int_t hitpos, | |
315 | Int_t *frowpixel,Int_t *fcolpixel, | |
316 | Double_t *fenepixel,AliITSpList *pList) { | |
317 | // Steering function to determine the digits associated to a given | |
318 | // hit (hitpos) | |
319 | // The digits are created by charge sharing (ChargeSharing) and by | |
320 | // capacitive coupling (SetCoupling). At all the created digits is | |
321 | // associated the track number of the hit (ntrack) | |
322 | Double_t x1l=0.0,y1l=0.0,z1l=0.0,x2l=0.0,y2l=0.0,z2l=0.0; | |
323 | Int_t r1,r2,c1,c2,row,col,npixel = 0; | |
324 | Int_t ntrack; | |
325 | Double_t ene=0.0,etot=0.0; | |
326 | const Float_t kconv = 10000.; // cm -> microns | |
327 | const Float_t kconv1= 0.277e9; // GeV -> electrons equivalent | |
328 | ||
329 | if(!(mod->LineSegmentL(hitpos,x1l,x2l,y1l,y2l,z1l,z2l,etot,ntrack)))return; | |
330 | ||
331 | x2l += x1l; y2l += y1l; z2l += z1l; // Convert to ending coordinate. | |
332 | // positions shifted and converted in microns | |
333 | x1l = x1l*kconv + fSegmentation->Dx()/2.; | |
334 | z1l = z1l*kconv + fSegmentation->Dz()/2.; | |
335 | // positions shifted and converted in microns | |
336 | x2l = x2l*kconv + fSegmentation->Dx()/2.; | |
337 | z2l = z2l*kconv + fSegmentation->Dz()/2.; | |
338 | etot *= kconv1; // convert from GeV to electrons equivalent. | |
339 | Int_t module = mod->GetIndex(); | |
340 | ||
341 | // to account for the effective sensitive area | |
342 | // introduced in geometry | |
343 | if (z1l<0 || z1l>fSegmentation->Dz()) return; | |
344 | if (z2l<0 || z2l>fSegmentation->Dz()) return; | |
345 | if (x1l<0 || x1l>fSegmentation->Dx()) return; | |
346 | if (x2l<0 || x2l>fSegmentation->Dx()) return; | |
347 | ||
348 | //Get the col and row number starting from 1 | |
349 | // the x direction is not inverted for the second layer!!! | |
350 | fSegmentation->GetPadIxz(x1l, z1l, c1, r1); | |
351 | fSegmentation->GetPadIxz(x2l, z2l, c2, r2); | |
352 | ||
353 | // to account for unexpected equal entrance and | |
354 | // exit coordinates | |
0fee5d51 | 355 | if (x1l==x2l) x2l=x2l+x2l*0.1; |
356 | if (z1l==z2l) z2l=z2l+z2l*0.1; | |
c7a4dac0 | 357 | |
358 | if ((r1==r2) && (c1==c2)){ | |
359 | // no charge sharing | |
360 | npixel = 1; | |
361 | frowpixel[npixel-1] = r1; | |
362 | fcolpixel[npixel-1] = c1; | |
363 | fenepixel[npixel-1] = etot; | |
364 | } else { | |
365 | // charge sharing | |
366 | ChargeSharing(x1l,z1l,x2l,z2l,c1,r1,c2,r2,etot, | |
367 | npixel,frowpixel,fcolpixel,fenepixel); | |
368 | } // end if r1==r2 && c1==c2. | |
369 | ||
370 | for (Int_t npix=0;npix<npixel;npix++){ | |
371 | row = frowpixel[npix]; | |
372 | col = fcolpixel[npix]; | |
373 | ene = fenepixel[npix]; | |
374 | UpdateMapSignal(row,col,ntrack,hitpos,module,ene,pList); | |
375 | // Starting capacitive coupling effect | |
376 | SetCoupling(row,col,ntrack,hitpos,module,pList); | |
377 | } // end for npix | |
378 | } | |
379 | //______________________________________________________________________ | |
380 | void AliITSsimulationSPD::ChargeSharing(Float_t x1l,Float_t z1l,Float_t x2l, | |
381 | Float_t z2l,Int_t c1,Int_t r1,Int_t c2, | |
382 | Int_t r2,Float_t etot, | |
383 | Int_t &npixel,Int_t *frowpixel, | |
384 | Int_t *fcolpixel,Double_t *fenepixel){ | |
385 | // Take into account the geometrical charge sharing when the track | |
386 | // crosses more than one pixel. | |
387 | // | |
388 | //Begin_Html | |
21b825a4 | 389 | /* |
c7a4dac0 | 390 | <img src="picts/ITS/barimodel_2.gif"> |
391 | </pre> | |
392 | <br clear=left> | |
393 | <font size=+2 color=red> | |
394 | <a href="mailto:Rocco.Caliandro@ba.infn.it"></a>. | |
395 | </font> | |
396 | <pre> | |
21b825a4 | 397 | */ |
c7a4dac0 | 398 | //End_Html |
399 | Float_t xa,za,xb,zb,dx,dz,dtot,dm,refr,refm,refc; | |
400 | Float_t refn=0.; | |
401 | Float_t arefm, arefr, arefn, arefc, azb, az2l, axb, ax2l; | |
402 | Int_t dirx,dirz,rb,cb; | |
403 | Int_t flag,flagrow,flagcol; | |
404 | Double_t epar; | |
405 | ||
406 | npixel = 0; | |
407 | xa = x1l; | |
408 | za = z1l; | |
cf6105a4 | 409 | // dx = x1l-x2l; |
410 | // dz = z1l-z2l; | |
411 | dx = x2l-x1l; | |
412 | dz = z2l-z1l; | |
c7a4dac0 | 413 | dtot = TMath::Sqrt((dx*dx)+(dz*dz)); |
d709f420 | 414 | if (dtot==0.0) dtot = 0.01; |
415 | dirx = (Int_t) TMath::Sign((Float_t)1,dx); | |
416 | dirz = (Int_t) TMath::Sign((Float_t)1,dz); | |
c7a4dac0 | 417 | |
418 | // calculate the x coordinate of the pixel in the next column | |
419 | // and the z coordinate of the pixel in the next row | |
420 | Float_t xpos, zpos; | |
421 | ||
422 | fSegmentation->GetPadCxz(c1, r1-1, xpos, zpos); | |
423 | ||
424 | Float_t xsize = fSegmentation->Dpx(0); | |
425 | Float_t zsize = fSegmentation->Dpz(r1-1); | |
21b825a4 | 426 | |
c7a4dac0 | 427 | if (dirx == 1) refr = xpos+xsize/2.; |
428 | else refr = xpos-xsize/2.; | |
429 | ||
430 | if (dirz == 1) refn = zpos+zsize/2.; | |
431 | else refn = zpos-zsize/2.; | |
432 | ||
433 | flag = 0; | |
434 | flagrow = 0; | |
435 | flagcol = 0; | |
436 | do{ | |
437 | // calculate the x coordinate of the intersection with the pixel | |
438 | // in the next cell in row direction | |
d709f420 | 439 | if(dz!=0) |
440 | refm = dx*((refn - z1l)/dz) + x1l; | |
441 | else | |
442 | refm = refr+dirx*xsize; | |
e8189707 | 443 | |
c7a4dac0 | 444 | // calculate the z coordinate of the intersection with the pixel |
445 | // in the next cell in column direction | |
d709f420 | 446 | if (dx!=0) |
447 | refc = dz*((refr - x1l)/dx) + z1l; | |
448 | else | |
449 | refc = refn+dirz*zsize; | |
c7a4dac0 | 450 | |
451 | arefm = refm * dirx; | |
452 | arefr = refr * dirx; | |
453 | arefn = refn * dirz; | |
454 | arefc = refc * dirz; | |
455 | ||
456 | if ((arefm < arefr) && (arefn < arefc)){ | |
457 | // the track goes in the pixel in the next cell in row direction | |
458 | xb = refm; | |
459 | zb = refn; | |
460 | cb = c1; | |
461 | rb = r1 + dirz; | |
462 | azb = zb * dirz; | |
463 | az2l = z2l * dirz; | |
464 | if (rb == r2) flagrow=1; | |
465 | if (azb > az2l) { | |
21b825a4 | 466 | zb = z2l; |
467 | xb = x2l; | |
c7a4dac0 | 468 | } // end if |
469 | // shift to the pixel in the next cell in row direction | |
470 | Float_t zsizeNext = fSegmentation->Dpz(rb-1); | |
471 | //to account for cell at the borders of the detector | |
472 | if(zsizeNext==0) zsizeNext = zsize; | |
473 | refn += zsizeNext*dirz; | |
474 | }else { | |
475 | // the track goes in the pixel in the next cell in column direction | |
476 | xb = refr; | |
477 | zb = refc; | |
478 | cb = c1 + dirx; | |
479 | rb = r1; | |
480 | axb = xb * dirx; | |
481 | ax2l = x2l * dirx; | |
482 | if (cb == c2) flagcol=1; | |
483 | if (axb > ax2l) { | |
21b825a4 | 484 | zb = z2l; |
485 | xb = x2l; | |
c7a4dac0 | 486 | } // end ifaxb > ax2l |
487 | ||
488 | // shift to the pixel in the next cell in column direction | |
489 | Float_t xsizeNext = fSegmentation->Dpx(cb-1); | |
490 | //to account for cell at the borders of the detector | |
491 | if(xsizeNext==0) xsizeNext = xsize; | |
492 | refr += xsizeNext*dirx; | |
493 | } // end if (arefm < arefr) && (arefn < arefc) | |
494 | ||
495 | //calculate the energy lost in the crossed pixel | |
496 | epar = TMath::Sqrt((xb-xa)*(xb-xa)+(zb-za)*(zb-za)); | |
497 | epar = etot*(epar/dtot); | |
498 | ||
499 | //store row, column and energy lost in the crossed pixel | |
500 | frowpixel[npixel] = r1; | |
501 | fcolpixel[npixel] = c1; | |
502 | fenepixel[npixel] = epar; | |
503 | npixel++; | |
21b825a4 | 504 | |
c7a4dac0 | 505 | // the exit point of the track is reached |
506 | if (epar == 0) flag = 1; | |
507 | if ((r1 == r2) && (c1 == c2)) flag = 1; | |
508 | if (flag!=1) { | |
509 | r1 = rb; | |
510 | c1 = cb; | |
511 | xa = xb; | |
512 | za = zb; | |
513 | } // end if flag!=1 | |
514 | } while (flag==0); | |
21b825a4 | 515 | } |
c7a4dac0 | 516 | //______________________________________________________________________ |
21b825a4 | 517 | void AliITSsimulationSPD::SetCoupling(Int_t row, Int_t col, Int_t ntrack, |
c7a4dac0 | 518 | Int_t idhit,Int_t module, |
519 | AliITSpList *pList) { | |
520 | // Take into account the coupling between adiacent pixels. | |
521 | // The parameters probcol and probrow are the fractions of the | |
522 | // signal in one pixel shared in the two adjacent pixels along | |
523 | // the column and row direction, respectively. | |
524 | // | |
525 | //Begin_Html | |
526 | /* | |
527 | <img src="picts/ITS/barimodel_3.gif"> | |
528 | </pre> | |
529 | <br clear=left> | |
530 | <font size=+2 color=red> | |
531 | <a href="mailto:Rocco.Caliandro@ba.infn.it"></a>. | |
532 | </font> | |
533 | <pre> | |
534 | */ | |
535 | //End_Html | |
536 | Int_t j1,j2,flag=0; | |
537 | Double_t pulse1,pulse2; | |
538 | Float_t couplR=0.0,couplC=0.0; | |
539 | ||
540 | GetCouplings(couplR,couplC); | |
541 | j1 = row; | |
542 | j2 = col; | |
543 | pulse1 = fMapA2->GetSignal(row,col); | |
544 | pulse2 = pulse1; | |
545 | for (Int_t isign=-1;isign<=1;isign+=2){// loop in row direction | |
546 | do{ | |
547 | j1 += isign; | |
548 | pulse1 *= couplR; | |
549 | if ((j1<0) || (j1>GetNPixelsZ()-1) || (pulse1<GetThreshold())){ | |
550 | pulse1 = fMapA2->GetSignal(row,col); | |
551 | j1 = row; | |
552 | flag = 1; | |
553 | }else{ | |
554 | UpdateMapSignal(j1,col,ntrack,idhit,module,pulse1,pList); | |
555 | flag = 0; | |
556 | } // end if | |
557 | } while(flag == 0); | |
558 | // loop in column direction | |
559 | do{ | |
560 | j2 += isign; | |
561 | pulse2 *= couplC; | |
562 | if ((j2<0) || (j2>(GetNPixelsX()-1)) || (pulse2<GetThreshold())){ | |
563 | pulse2 = fMapA2->GetSignal(row,col); | |
564 | j2 = col; | |
565 | flag = 1; | |
566 | }else{ | |
567 | UpdateMapSignal(row,j2,ntrack,idhit,module,pulse2,pList); | |
568 | flag = 0; | |
569 | } // end if | |
570 | } while(flag == 0); | |
571 | } // for isign | |
21b825a4 | 572 | } |
c7a4dac0 | 573 | //______________________________________________________________________ |
574 | void AliITSsimulationSPD::CreateDigit(Int_t module,AliITSpList *pList) { | |
575 | // The pixels are fired if the energy deposited inside them is above | |
576 | // the threshold parameter ethr. Fired pixed are interpreted as digits | |
577 | // and stored in the file digitfilename. One also needs to write out | |
578 | // cases when there is only noise (nhits==0). | |
579 | ||
580 | static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); | |
581 | ||
582 | Int_t digits[3]; | |
583 | Int_t tracks[3]; | |
584 | Int_t hits[3]; | |
585 | Float_t charges[3]; | |
586 | Int_t j1; | |
587 | ||
588 | for (Int_t r=1;r<=GetNPixelsZ();r++) { | |
589 | for (Int_t c=1;c<=GetNPixelsX();c++) { | |
590 | // check if the deposited energy in a pixel is above the | |
591 | // threshold | |
592 | Float_t signal = (Float_t) fMapA2->GetSignal(r,c); | |
593 | if ( signal > GetThreshold()) { | |
594 | digits[0] = r-1; // digits starts from 0 | |
595 | digits[1] = c-1; // digits starts from 0 | |
596 | //digits[2] = 1; | |
597 | digits[2] = (Int_t) signal; // the signal is stored in | |
598 | // electrons | |
599 | for(j1=0;j1<3;j1++){ | |
600 | tracks[j1] = pList->GetTrack(r,c,j1); | |
601 | hits[j1] = pList->GetHit(r,c,j1); | |
21b825a4 | 602 | charges[j1] = 0; |
c7a4dac0 | 603 | } // end for j1 |
3a97c582 | 604 | Float_t phys = 0; |
c7a4dac0 | 605 | aliITS->AddSimDigit(0,phys,digits,tracks,hits,charges); |
bb6b39bf | 606 | #ifdef DEBUG |
607 | cout << " CreateSPDDigit mod=" << fModule << " r,c=" << r; | |
608 | cout <<","<<c<< " sig=" << fpList->GetSignalOnly(r,c); | |
609 | cout << " noise=" << fpList->GetNoise(r,c); | |
610 | cout << " Msig="<< signal << " Thres=" << GetThreshold()<<endl; | |
611 | #endif | |
c7a4dac0 | 612 | } // end if of threshold condition |
613 | } // for c | |
614 | }// end do on pixels | |
21b825a4 | 615 | } |
c7a4dac0 | 616 | //______________________________________________________________________ |
617 | void AliITSsimulationSPD::SetFluctuations(AliITSpList *pList,Int_t module) { | |
618 | // Set the electronic noise and threshold non-uniformities to all the | |
619 | // pixels in a detector. | |
620 | // The parameter fSigma is the squared sum of the sigma due to noise | |
621 | // and the sigma of the threshold distribution among pixels. | |
622 | // | |
623 | //Begin_Html | |
624 | /* | |
625 | <img src="picts/ITS/barimodel_1.gif"> | |
626 | </pre> | |
627 | <br clear=left> | |
628 | <font size=+2 color=red> | |
629 | <a href="mailto:Rocco.Caliandro@ba.infn.it"></a>. | |
630 | </font> | |
631 | <pre> | |
632 | */ | |
633 | //End_Html | |
634 | Float_t thr=0.0,sigm=0.0; | |
635 | Double_t signal,sigma; | |
636 | Int_t iz,ix; | |
637 | ||
638 | GetThresholds(thr,sigm); | |
639 | sigma = (Double_t) sigm; | |
640 | for(iz=1;iz<=GetNPixelsZ();iz++){ | |
641 | for(ix=1;ix<=GetNPixelsX();ix++){ | |
642 | signal = sigma*gRandom->Gaus(); | |
643 | fMapA2->SetHit(iz,ix,signal); | |
644 | // insert in the label-signal-hit list the pixels fired | |
645 | // only by noise | |
646 | pList->AddNoise(iz,ix,module,signal); | |
647 | } // end of loop on pixels | |
21b825a4 | 648 | } // end of loop on pixels |
c7a4dac0 | 649 | } |
650 | //______________________________________________________________________ | |
651 | void AliITSsimulationSPD::SetMask() { | |
652 | // Apply a mask to the SPD module. 1% of the pixel channels are | |
653 | // masked. When the database will be ready, the masked pixels | |
654 | // should be read from it. | |
655 | Double_t signal; | |
656 | Int_t iz,ix,im; | |
657 | Float_t totMask; | |
658 | Float_t perc = ((AliITSresponseSPD*)fResponse)->GetFractionDead(); | |
659 | // in this way we get the same set of random numbers for all runs. | |
660 | // This is a cluge for now. | |
661 | static TRandom *rnd = new TRandom(); | |
662 | ||
663 | totMask= perc*GetNPixelsZ()*GetNPixelsX(); | |
664 | for(im=1;im<totMask;im++){ | |
665 | do{ | |
666 | ix=(Int_t)(rnd->Rndm()*(GetNPixelsX()-1.) + 1.); | |
667 | } while(ix<=0 || ix>GetNPixelsX()); | |
668 | do{ | |
669 | iz=(Int_t)(rnd->Rndm()*(GetNPixelsZ()-1.) + 1.); | |
670 | } while(iz<=0 || iz>GetNPixelsZ()); | |
671 | signal = -1.; | |
672 | fMapA2->SetHit(iz,ix,signal); | |
673 | } // end loop on masked pixels | |
674 | } | |
675 | //______________________________________________________________________ | |
21b825a4 | 676 | void AliITSsimulationSPD::CreateHistograms() { |
c7a4dac0 | 677 | // Create Histograms |
678 | Int_t i; | |
21b825a4 | 679 | |
c7a4dac0 | 680 | fHis=new TObjArray(GetNPixelsZ()); |
681 | for(i=0;i<GetNPixelsZ();i++) { | |
682 | TString spdname("spd_"); | |
683 | Char_t candnum[4]; | |
684 | sprintf(candnum,"%d",i+1); | |
685 | spdname.Append(candnum); | |
686 | (*fHis)[i] = new TH1F(spdname.Data(),"SPD maps", | |
687 | GetNPixelsX(),0.,(Float_t) GetNPixelsX()); | |
688 | } // end for i | |
b0f5e3fc | 689 | } |
c7a4dac0 | 690 | //______________________________________________________________________ |
21b825a4 | 691 | void AliITSsimulationSPD::ResetHistograms() { |
b0f5e3fc | 692 | // Reset histograms for this detector |
21b825a4 | 693 | Int_t i; |
b0f5e3fc | 694 | |
c7a4dac0 | 695 | for(i=0;i<GetNPixelsZ();i++ ) { |
696 | if ((*fHis)[i]) ((TH1F*)(*fHis)[i])->Reset(); | |
697 | } // end for i | |
698 | } | |
699 | //______________________________________________________________________ | |
700 | void AliITSsimulationSPD::WriteSDigits(AliITSpList *pList){ | |
701 | // Fills the Summable digits Tree | |
702 | Int_t i,ni,j,nj; | |
703 | static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); | |
704 | ||
705 | pList->GetMaxMapIndex(ni,nj); | |
706 | for(i=0;i<ni;i++)for(j=0;j<nj;j++){ | |
707 | if(pList->GetSignalOnly(i,j)>0.0){ | |
708 | aliITS->AddSumDigit(*(pList->GetpListItem(i,j))); | |
bb6b39bf | 709 | #ifdef DEBUG |
710 | cout << "pListSPD: " << *(pList->GetpListItem(i,j)) << endl; | |
711 | cout << " CreateSPDSDigit mod=" << fModule << " r,c="; | |
712 | cout << i <<","<< j << " sig=" << fpList->GetSignalOnly(i,j); | |
713 | cout << " noise=" << fpList->GetNoise(i,j) <<endl; | |
714 | #endif | |
c7a4dac0 | 715 | } // end if |
716 | } // end for i,j | |
717 | return; | |
718 | } | |
719 | //______________________________________________________________________ | |
720 | void AliITSsimulationSPD::FillMapFrompList(AliITSpList *pList){ | |
721 | // Fills fMap2A from the pList of Summable digits | |
3a97c582 | 722 | Int_t ix,iz; |
c7a4dac0 | 723 | |
3a97c582 | 724 | for(iz=0;iz<GetNPixelsZ();iz++)for(ix=0;ix<GetNPixelsX();ix++) |
725 | fMapA2->AddSignal(iz,ix,pList->GetSignal(iz,ix)); | |
c7a4dac0 | 726 | return; |
b0f5e3fc | 727 | } |