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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 | $Log$ | |
ee86d557 | 18 | Revision 1.18 2002/08/21 22:11:13 nilsen |
19 | Debug output now settable via a DEBUG flag. | |
20 | ||
bb6b39bf | 21 | Revision 1.17 2002/07/16 17:00:17 barbera |
22 | Fixes added to make the slow simulation running with the current HEAD (from M. Masera) | |
23 | ||
cf6105a4 | 24 | Revision 1.16 2002/06/19 16:02:22 hristov |
25 | Division by zero corrected | |
26 | ||
d709f420 | 27 | Revision 1.15 2002/03/15 17:32:14 nilsen |
28 | Reintroduced SDigitization, and Digitization from SDigits, along with | |
29 | functions InitSimulationModule, and FinishSDigitizModule. | |
30 | ||
3a97c582 | 31 | Revision 1.14 2001/11/23 13:04:07 barbera |
32 | Some protection added in case of high multiplicity | |
33 | ||
0fee5d51 | 34 | Revision 1.13 2001/11/13 11:13:24 barbera |
35 | A protection against tracks with the same entrance and exit has been made more strict | |
36 | ||
0cadf298 | 37 | Revision 1.12 2001/10/04 22:44:31 nilsen |
38 | Major changes in supppor of PreDigits (SDigits). Changes made with will make | |
39 | it easier to suppor expected changes in AliITSHit class. Added use of new | |
40 | class AliITSpList. Both SPD and SDD have added effects of Dead Channels. Both | |
41 | of these will require addtional work as data bases of detectors and the like | |
42 | are developed. | |
43 | ||
c7a4dac0 | 44 | */ |
b0f5e3fc | 45 | #include <iostream.h> |
46 | #include <TRandom.h> | |
47 | #include <TH1.h> | |
e8189707 | 48 | #include <TMath.h> |
9f033001 | 49 | #include <TString.h> |
50 | #include <TParticle.h> | |
e8189707 | 51 | |
b0f5e3fc | 52 | #include "AliRun.h" |
e8189707 | 53 | #include "AliITS.h" |
9f033001 | 54 | #include "AliITShit.h" |
55 | #include "AliITSdigit.h" | |
56 | #include "AliITSmodule.h" | |
21b825a4 | 57 | #include "AliITSMapA2.h" |
c7a4dac0 | 58 | #include "AliITSpList.h" |
b0f5e3fc | 59 | #include "AliITSsimulationSPD.h" |
9f033001 | 60 | #include "AliITSsegmentation.h" |
61 | #include "AliITSresponse.h" | |
c7a4dac0 | 62 | #include "AliITSsegmentationSPD.h" |
63 | #include "AliITSresponseSPD.h" | |
9f033001 | 64 | |
bb6b39bf | 65 | //#define DEBUG |
e8189707 | 66 | |
b0f5e3fc | 67 | ClassImp(AliITSsimulationSPD) |
68 | //////////////////////////////////////////////////////////////////////// | |
69 | // Version: 0 | |
21b825a4 | 70 | // Written by Rocco Caliandro |
71 | // from a model developed with T. Virgili and R.A. Fini | |
72 | // June 15 2000 | |
b0f5e3fc | 73 | // |
74 | // AliITSsimulationSPD is the simulation of SPDs | |
21b825a4 | 75 | // |
c7a4dac0 | 76 | //______________________________________________________________________ |
21b825a4 | 77 | AliITSsimulationSPD::AliITSsimulationSPD(){ |
c7a4dac0 | 78 | // Default constructor |
79 | ||
80 | fResponse = 0; | |
81 | fSegmentation = 0; | |
82 | fHis = 0; | |
83 | fMapA2 = 0; | |
3a97c582 | 84 | |
c7a4dac0 | 85 | /* |
86 | fThresh = 0.; | |
87 | fSigma = 0.; | |
88 | fCouplCol = 0.; | |
89 | fCouplRow = 0.; */ | |
b0f5e3fc | 90 | } |
c7a4dac0 | 91 | //______________________________________________________________________ |
92 | AliITSsimulationSPD::AliITSsimulationSPD(AliITSsegmentation *seg, | |
93 | AliITSresponse *resp) { | |
94 | // Standard constructor | |
95 | ||
96 | fResponse = 0; | |
97 | fSegmentation = 0; | |
98 | fHis = 0; | |
99 | fMapA2 = 0; | |
3a97c582 | 100 | |
c7a4dac0 | 101 | /* |
102 | fThresh = 0.; | |
103 | fSigma = 0.; | |
104 | fCouplCol = 0.; | |
105 | fCouplRow = 0.*/ | |
106 | Init((AliITSsegmentationSPD*)seg,(AliITSresponseSPD*)resp); | |
b0f5e3fc | 107 | } |
c7a4dac0 | 108 | //______________________________________________________________________ |
109 | void AliITSsimulationSPD::Init(AliITSsegmentationSPD *seg, | |
110 | AliITSresponseSPD *resp) { | |
111 | // Initilizes the variables of AliITSsimulation SPD. | |
112 | ||
113 | fHis = 0; | |
114 | fResponse = resp; | |
115 | fSegmentation = seg; | |
3a97c582 | 116 | fMapA2 = new AliITSMapA2(fSegmentation); |
117 | fpList = new AliITSpList(GetNPixelsZ()+1,GetNPixelsX()+1); | |
c7a4dac0 | 118 | /* |
119 | fResponse->Thresholds(fThresh,fSigma); | |
120 | fResponse->GetNoiseParam(fCouplCol,fCouplRow); | |
121 | fNPixelsZ = fSegmentation->Npz(); | |
122 | fNPixelsX = fSegmentation->Npx(); | |
123 | */ | |
124 | } | |
125 | //______________________________________________________________________ | |
b0f5e3fc | 126 | AliITSsimulationSPD::~AliITSsimulationSPD() { |
c7a4dac0 | 127 | // destructor |
b0f5e3fc | 128 | |
c7a4dac0 | 129 | delete fMapA2; |
3a97c582 | 130 | // delete fpList; |
b0f5e3fc | 131 | |
c7a4dac0 | 132 | if (fHis) { |
133 | fHis->Delete(); | |
134 | delete fHis; | |
135 | } // end if | |
b0f5e3fc | 136 | } |
c7a4dac0 | 137 | //______________________________________________________________________ |
b0f5e3fc | 138 | AliITSsimulationSPD::AliITSsimulationSPD(const AliITSsimulationSPD &source){ |
c7a4dac0 | 139 | // Copy Constructor |
140 | ||
141 | if(&source == this) return; | |
142 | ||
143 | this->fMapA2 = source.fMapA2; | |
144 | this->fHis = source.fHis; | |
145 | /* | |
146 | this->fThresh = source.fThresh; | |
147 | this->fSigma = source.fSigma; | |
148 | this->fCouplCol = source.fCouplCol; | |
149 | this->fCouplRow = source.fCouplRow; | |
150 | this->fNPixelsX = source.fNPixelsX; | |
151 | this->fNPixelsZ = source.fNPixelsZ; | |
152 | */ | |
153 | return; | |
b0f5e3fc | 154 | } |
c7a4dac0 | 155 | //______________________________________________________________________ |
156 | AliITSsimulationSPD& AliITSsimulationSPD::operator=(const AliITSsimulationSPD | |
157 | &source) { | |
158 | // Assignment operator | |
159 | ||
160 | if(&source == this) return *this; | |
161 | ||
162 | this->fMapA2 = source.fMapA2; | |
163 | this->fHis = source.fHis; | |
164 | /* | |
165 | this->fThresh = source.fThresh; | |
166 | this->fSigma = source.fSigma; | |
167 | this->fCouplCol = source.fCouplCol; | |
168 | this->fCouplRow = source.fCouplRow; | |
169 | this->fNPixelsX = source.fNPixelsX; | |
170 | this->fNPixelsZ = source.fNPixelsZ; | |
171 | */ | |
172 | return *this; | |
3a97c582 | 173 | } |
174 | //______________________________________________________________________ | |
175 | void AliITSsimulationSPD::InitSimulationModule(Int_t module,Int_t event){ | |
176 | // Creates maps to build the list of tracks for each sumable digit | |
177 | // Inputs: | |
178 | // Int_t module // Module number to be simulated | |
179 | // Int_t event // Event number to be simulated | |
180 | // Outputs: | |
181 | // none. | |
182 | // Return | |
183 | // none. | |
184 | ||
185 | fModule = module; | |
186 | fEvent = event; | |
187 | fMapA2->ClearMap(); | |
188 | fpList->ClearMap(); | |
189 | } | |
190 | //______________________________________________________________________ | |
191 | void AliITSsimulationSPD::FinishSDigitiseModule(){ | |
192 | // Does the Sdigits to Digits work | |
193 | // Inputs: | |
194 | // none. | |
195 | // Outputs: | |
196 | // none. | |
197 | // Return: | |
198 | // none. | |
199 | ||
200 | SDigitsToDigits(fModule,fpList); | |
c7a4dac0 | 201 | } |
202 | //______________________________________________________________________ | |
203 | void AliITSsimulationSPD::SDigitiseModule(AliITSmodule *mod, Int_t dummy0, | |
204 | Int_t dummy1) { | |
205 | // Sum digitize module | |
206 | if (!(mod->GetNhits())) return; // if module has no hits then no Sdigits. | |
207 | Int_t number = 10000; | |
208 | Int_t *frowpixel = new Int_t[number]; | |
209 | Int_t *fcolpixel = new Int_t[number]; | |
210 | Double_t *fenepixel = new Double_t[number]; | |
211 | ||
3a97c582 | 212 | fModule = mod->GetIndex(); |
213 | ||
c7a4dac0 | 214 | // Array of pointers to store the track index of the digits |
215 | // leave +1, otherwise pList crashes when col=256, row=192 | |
c7a4dac0 | 216 | |
3a97c582 | 217 | HitsToAnalogDigits(mod,frowpixel,fcolpixel,fenepixel,fpList); |
c7a4dac0 | 218 | |
3a97c582 | 219 | WriteSDigits(fpList); |
c7a4dac0 | 220 | |
221 | // clean memory | |
222 | delete[] frowpixel; | |
223 | delete[] fcolpixel; | |
224 | delete[] fenepixel; | |
225 | fMapA2->ClearMap(); | |
3a97c582 | 226 | fpList->ClearMap(); |
c7a4dac0 | 227 | } |
228 | //______________________________________________________________________ | |
229 | void AliITSsimulationSPD::DigitiseModule(AliITSmodule *mod, Int_t dummy0, | |
230 | Int_t dummy1) { | |
231 | // digitize module. Also need to digitize modules with only noise. | |
b0f5e3fc | 232 | |
c7a4dac0 | 233 | Int_t number = 10000; |
234 | Int_t *frowpixel = new Int_t[number]; | |
235 | Int_t *fcolpixel = new Int_t[number]; | |
236 | Double_t *fenepixel = new Double_t[number]; | |
b0f5e3fc | 237 | |
c7a4dac0 | 238 | // Array of pointers to store the track index of the digits |
3a97c582 | 239 | // leave +1, otherwise pList crashes when col=256, row=192 |
240 | fModule = mod->GetIndex(); | |
c7a4dac0 | 241 | // noise setting |
3a97c582 | 242 | SetFluctuations(fpList,fModule); |
b0f5e3fc | 243 | |
3a97c582 | 244 | HitsToAnalogDigits(mod,frowpixel,fcolpixel,fenepixel,fpList); |
21b825a4 | 245 | |
c7a4dac0 | 246 | // apply mask to SPD module |
247 | SetMask(); | |
21b825a4 | 248 | |
3a97c582 | 249 | CreateDigit(fModule,fpList); |
b0f5e3fc | 250 | |
c7a4dac0 | 251 | // clean memory |
252 | delete[] frowpixel; | |
253 | delete[] fcolpixel; | |
254 | delete[] fenepixel; | |
255 | fMapA2->ClearMap(); | |
3a97c582 | 256 | fpList->ClearMap(); |
21b825a4 | 257 | } |
c7a4dac0 | 258 | //______________________________________________________________________ |
259 | void AliITSsimulationSPD::SDigitsToDigits(Int_t module,AliITSpList *pList) { | |
260 | // sum digits to Digits. | |
bb6b39bf | 261 | |
262 | #ifdef DEBUG | |
263 | cout << "Entering AliITSsimulatinSPD::SDigitsToDigits for module="; | |
264 | cout << module << endl; | |
265 | #endif | |
3a97c582 | 266 | fModule = module; |
b0f5e3fc | 267 | |
c7a4dac0 | 268 | // noise setting |
269 | SetFluctuations(pList,module); | |
b0f5e3fc | 270 | |
3a97c582 | 271 | fMapA2->ClearMap(); // since noise is in pList aready. Zero Map so that |
272 | // noise is not doubled when calling FillMapFrompList. | |
273 | ||
274 | FillMapFrompList(pList); | |
275 | ||
c7a4dac0 | 276 | // apply mask to SPD module |
277 | SetMask(); | |
21b825a4 | 278 | |
c7a4dac0 | 279 | CreateDigit(module,pList); |
3a97c582 | 280 | |
281 | fMapA2->ClearMap(); | |
282 | pList->ClearMap(); | |
c7a4dac0 | 283 | } |
284 | //______________________________________________________________________ | |
285 | void AliITSsimulationSPD::UpdateMapSignal(Int_t row,Int_t col,Int_t trk, | |
286 | Int_t hit,Int_t mod,Double_t ene, | |
287 | AliITSpList *pList) { | |
288 | // updates the Map of signal, adding the energy (ene) released by | |
289 | // the current track | |
290 | ||
291 | fMapA2->AddSignal(row,col,ene); | |
292 | pList->AddSignal(row,col,trk,hit,mod,ene); | |
293 | } | |
294 | //______________________________________________________________________ | |
295 | void AliITSsimulationSPD::UpdateMapNoise(Int_t row,Int_t col,Int_t mod, | |
296 | Double_t ene,AliITSpList *pList) { | |
297 | // updates the Map of noise, adding the energy (ene) give my noise | |
21b825a4 | 298 | |
c7a4dac0 | 299 | fMapA2->AddSignal(row,col,ene); |
300 | pList->AddNoise(row,col,mod,ene); | |
301 | } | |
302 | //______________________________________________________________________ | |
303 | void AliITSsimulationSPD::HitsToAnalogDigits(AliITSmodule *mod, | |
304 | Int_t *frowpixel,Int_t *fcolpixel, | |
305 | Double_t *fenepixel, | |
306 | AliITSpList *pList) { | |
307 | // Loops over all hits to produce Analog/floting point digits. This | |
308 | // is also the first task in producing standard digits. | |
21b825a4 | 309 | |
c7a4dac0 | 310 | // loop over hits in the module |
311 | Int_t hitpos,nhits = mod->GetNhits(); | |
312 | for (hitpos=0;hitpos<nhits;hitpos++) { | |
313 | HitToDigit(mod,hitpos,frowpixel,fcolpixel,fenepixel,pList); | |
314 | }// end loop over digits | |
315 | } | |
316 | //______________________________________________________________________ | |
317 | void AliITSsimulationSPD::HitToDigit(AliITSmodule *mod,Int_t hitpos, | |
318 | Int_t *frowpixel,Int_t *fcolpixel, | |
319 | Double_t *fenepixel,AliITSpList *pList) { | |
320 | // Steering function to determine the digits associated to a given | |
321 | // hit (hitpos) | |
322 | // The digits are created by charge sharing (ChargeSharing) and by | |
323 | // capacitive coupling (SetCoupling). At all the created digits is | |
324 | // associated the track number of the hit (ntrack) | |
325 | Double_t x1l=0.0,y1l=0.0,z1l=0.0,x2l=0.0,y2l=0.0,z2l=0.0; | |
326 | Int_t r1,r2,c1,c2,row,col,npixel = 0; | |
327 | Int_t ntrack; | |
328 | Double_t ene=0.0,etot=0.0; | |
329 | const Float_t kconv = 10000.; // cm -> microns | |
330 | const Float_t kconv1= 0.277e9; // GeV -> electrons equivalent | |
331 | ||
332 | if(!(mod->LineSegmentL(hitpos,x1l,x2l,y1l,y2l,z1l,z2l,etot,ntrack)))return; | |
333 | ||
334 | x2l += x1l; y2l += y1l; z2l += z1l; // Convert to ending coordinate. | |
335 | // positions shifted and converted in microns | |
336 | x1l = x1l*kconv + fSegmentation->Dx()/2.; | |
337 | z1l = z1l*kconv + fSegmentation->Dz()/2.; | |
338 | // positions shifted and converted in microns | |
339 | x2l = x2l*kconv + fSegmentation->Dx()/2.; | |
340 | z2l = z2l*kconv + fSegmentation->Dz()/2.; | |
341 | etot *= kconv1; // convert from GeV to electrons equivalent. | |
342 | Int_t module = mod->GetIndex(); | |
343 | ||
344 | // to account for the effective sensitive area | |
345 | // introduced in geometry | |
346 | if (z1l<0 || z1l>fSegmentation->Dz()) return; | |
347 | if (z2l<0 || z2l>fSegmentation->Dz()) return; | |
348 | if (x1l<0 || x1l>fSegmentation->Dx()) return; | |
349 | if (x2l<0 || x2l>fSegmentation->Dx()) return; | |
350 | ||
351 | //Get the col and row number starting from 1 | |
352 | // the x direction is not inverted for the second layer!!! | |
353 | fSegmentation->GetPadIxz(x1l, z1l, c1, r1); | |
354 | fSegmentation->GetPadIxz(x2l, z2l, c2, r2); | |
355 | ||
356 | // to account for unexpected equal entrance and | |
357 | // exit coordinates | |
0fee5d51 | 358 | if (x1l==x2l) x2l=x2l+x2l*0.1; |
359 | if (z1l==z2l) z2l=z2l+z2l*0.1; | |
c7a4dac0 | 360 | |
361 | if ((r1==r2) && (c1==c2)){ | |
362 | // no charge sharing | |
363 | npixel = 1; | |
364 | frowpixel[npixel-1] = r1; | |
365 | fcolpixel[npixel-1] = c1; | |
366 | fenepixel[npixel-1] = etot; | |
367 | } else { | |
368 | // charge sharing | |
369 | ChargeSharing(x1l,z1l,x2l,z2l,c1,r1,c2,r2,etot, | |
370 | npixel,frowpixel,fcolpixel,fenepixel); | |
371 | } // end if r1==r2 && c1==c2. | |
372 | ||
373 | for (Int_t npix=0;npix<npixel;npix++){ | |
374 | row = frowpixel[npix]; | |
375 | col = fcolpixel[npix]; | |
376 | ene = fenepixel[npix]; | |
377 | UpdateMapSignal(row,col,ntrack,hitpos,module,ene,pList); | |
378 | // Starting capacitive coupling effect | |
379 | SetCoupling(row,col,ntrack,hitpos,module,pList); | |
380 | } // end for npix | |
381 | } | |
382 | //______________________________________________________________________ | |
383 | void AliITSsimulationSPD::ChargeSharing(Float_t x1l,Float_t z1l,Float_t x2l, | |
384 | Float_t z2l,Int_t c1,Int_t r1,Int_t c2, | |
385 | Int_t r2,Float_t etot, | |
386 | Int_t &npixel,Int_t *frowpixel, | |
387 | Int_t *fcolpixel,Double_t *fenepixel){ | |
388 | // Take into account the geometrical charge sharing when the track | |
389 | // crosses more than one pixel. | |
390 | // | |
391 | //Begin_Html | |
21b825a4 | 392 | /* |
c7a4dac0 | 393 | <img src="picts/ITS/barimodel_2.gif"> |
394 | </pre> | |
395 | <br clear=left> | |
396 | <font size=+2 color=red> | |
397 | <a href="mailto:Rocco.Caliandro@ba.infn.it"></a>. | |
398 | </font> | |
399 | <pre> | |
21b825a4 | 400 | */ |
c7a4dac0 | 401 | //End_Html |
ee86d557 | 402 | //Float_t dm; |
403 | Float_t xa,za,xb,zb,dx,dz,dtot,refr,refm,refc; | |
c7a4dac0 | 404 | Float_t refn=0.; |
405 | Float_t arefm, arefr, arefn, arefc, azb, az2l, axb, ax2l; | |
406 | Int_t dirx,dirz,rb,cb; | |
407 | Int_t flag,flagrow,flagcol; | |
408 | Double_t epar; | |
409 | ||
410 | npixel = 0; | |
411 | xa = x1l; | |
412 | za = z1l; | |
cf6105a4 | 413 | // dx = x1l-x2l; |
414 | // dz = z1l-z2l; | |
415 | dx = x2l-x1l; | |
416 | dz = z2l-z1l; | |
c7a4dac0 | 417 | dtot = TMath::Sqrt((dx*dx)+(dz*dz)); |
d709f420 | 418 | if (dtot==0.0) dtot = 0.01; |
419 | dirx = (Int_t) TMath::Sign((Float_t)1,dx); | |
420 | dirz = (Int_t) TMath::Sign((Float_t)1,dz); | |
c7a4dac0 | 421 | |
422 | // calculate the x coordinate of the pixel in the next column | |
423 | // and the z coordinate of the pixel in the next row | |
424 | Float_t xpos, zpos; | |
425 | ||
426 | fSegmentation->GetPadCxz(c1, r1-1, xpos, zpos); | |
427 | ||
428 | Float_t xsize = fSegmentation->Dpx(0); | |
429 | Float_t zsize = fSegmentation->Dpz(r1-1); | |
21b825a4 | 430 | |
c7a4dac0 | 431 | if (dirx == 1) refr = xpos+xsize/2.; |
432 | else refr = xpos-xsize/2.; | |
433 | ||
434 | if (dirz == 1) refn = zpos+zsize/2.; | |
435 | else refn = zpos-zsize/2.; | |
436 | ||
437 | flag = 0; | |
438 | flagrow = 0; | |
439 | flagcol = 0; | |
440 | do{ | |
441 | // calculate the x coordinate of the intersection with the pixel | |
442 | // in the next cell in row direction | |
d709f420 | 443 | if(dz!=0) |
444 | refm = dx*((refn - z1l)/dz) + x1l; | |
445 | else | |
446 | refm = refr+dirx*xsize; | |
e8189707 | 447 | |
c7a4dac0 | 448 | // calculate the z coordinate of the intersection with the pixel |
449 | // in the next cell in column direction | |
d709f420 | 450 | if (dx!=0) |
451 | refc = dz*((refr - x1l)/dx) + z1l; | |
452 | else | |
453 | refc = refn+dirz*zsize; | |
c7a4dac0 | 454 | |
455 | arefm = refm * dirx; | |
456 | arefr = refr * dirx; | |
457 | arefn = refn * dirz; | |
458 | arefc = refc * dirz; | |
459 | ||
460 | if ((arefm < arefr) && (arefn < arefc)){ | |
461 | // the track goes in the pixel in the next cell in row direction | |
462 | xb = refm; | |
463 | zb = refn; | |
464 | cb = c1; | |
465 | rb = r1 + dirz; | |
466 | azb = zb * dirz; | |
467 | az2l = z2l * dirz; | |
468 | if (rb == r2) flagrow=1; | |
469 | if (azb > az2l) { | |
21b825a4 | 470 | zb = z2l; |
471 | xb = x2l; | |
c7a4dac0 | 472 | } // end if |
473 | // shift to the pixel in the next cell in row direction | |
474 | Float_t zsizeNext = fSegmentation->Dpz(rb-1); | |
475 | //to account for cell at the borders of the detector | |
476 | if(zsizeNext==0) zsizeNext = zsize; | |
477 | refn += zsizeNext*dirz; | |
478 | }else { | |
479 | // the track goes in the pixel in the next cell in column direction | |
480 | xb = refr; | |
481 | zb = refc; | |
482 | cb = c1 + dirx; | |
483 | rb = r1; | |
484 | axb = xb * dirx; | |
485 | ax2l = x2l * dirx; | |
486 | if (cb == c2) flagcol=1; | |
487 | if (axb > ax2l) { | |
21b825a4 | 488 | zb = z2l; |
489 | xb = x2l; | |
c7a4dac0 | 490 | } // end ifaxb > ax2l |
491 | ||
492 | // shift to the pixel in the next cell in column direction | |
493 | Float_t xsizeNext = fSegmentation->Dpx(cb-1); | |
494 | //to account for cell at the borders of the detector | |
495 | if(xsizeNext==0) xsizeNext = xsize; | |
496 | refr += xsizeNext*dirx; | |
497 | } // end if (arefm < arefr) && (arefn < arefc) | |
498 | ||
499 | //calculate the energy lost in the crossed pixel | |
500 | epar = TMath::Sqrt((xb-xa)*(xb-xa)+(zb-za)*(zb-za)); | |
501 | epar = etot*(epar/dtot); | |
502 | ||
503 | //store row, column and energy lost in the crossed pixel | |
504 | frowpixel[npixel] = r1; | |
505 | fcolpixel[npixel] = c1; | |
506 | fenepixel[npixel] = epar; | |
507 | npixel++; | |
21b825a4 | 508 | |
c7a4dac0 | 509 | // the exit point of the track is reached |
510 | if (epar == 0) flag = 1; | |
511 | if ((r1 == r2) && (c1 == c2)) flag = 1; | |
512 | if (flag!=1) { | |
513 | r1 = rb; | |
514 | c1 = cb; | |
515 | xa = xb; | |
516 | za = zb; | |
517 | } // end if flag!=1 | |
518 | } while (flag==0); | |
21b825a4 | 519 | } |
c7a4dac0 | 520 | //______________________________________________________________________ |
21b825a4 | 521 | void AliITSsimulationSPD::SetCoupling(Int_t row, Int_t col, Int_t ntrack, |
c7a4dac0 | 522 | Int_t idhit,Int_t module, |
523 | AliITSpList *pList) { | |
524 | // Take into account the coupling between adiacent pixels. | |
525 | // The parameters probcol and probrow are the fractions of the | |
526 | // signal in one pixel shared in the two adjacent pixels along | |
527 | // the column and row direction, respectively. | |
528 | // | |
529 | //Begin_Html | |
530 | /* | |
531 | <img src="picts/ITS/barimodel_3.gif"> | |
532 | </pre> | |
533 | <br clear=left> | |
534 | <font size=+2 color=red> | |
535 | <a href="mailto:Rocco.Caliandro@ba.infn.it"></a>. | |
536 | </font> | |
537 | <pre> | |
538 | */ | |
539 | //End_Html | |
540 | Int_t j1,j2,flag=0; | |
541 | Double_t pulse1,pulse2; | |
542 | Float_t couplR=0.0,couplC=0.0; | |
543 | ||
544 | GetCouplings(couplR,couplC); | |
545 | j1 = row; | |
546 | j2 = col; | |
547 | pulse1 = fMapA2->GetSignal(row,col); | |
548 | pulse2 = pulse1; | |
549 | for (Int_t isign=-1;isign<=1;isign+=2){// loop in row direction | |
550 | do{ | |
551 | j1 += isign; | |
552 | pulse1 *= couplR; | |
553 | if ((j1<0) || (j1>GetNPixelsZ()-1) || (pulse1<GetThreshold())){ | |
554 | pulse1 = fMapA2->GetSignal(row,col); | |
555 | j1 = row; | |
556 | flag = 1; | |
557 | }else{ | |
558 | UpdateMapSignal(j1,col,ntrack,idhit,module,pulse1,pList); | |
559 | flag = 0; | |
560 | } // end if | |
561 | } while(flag == 0); | |
562 | // loop in column direction | |
563 | do{ | |
564 | j2 += isign; | |
565 | pulse2 *= couplC; | |
566 | if ((j2<0) || (j2>(GetNPixelsX()-1)) || (pulse2<GetThreshold())){ | |
567 | pulse2 = fMapA2->GetSignal(row,col); | |
568 | j2 = col; | |
569 | flag = 1; | |
570 | }else{ | |
571 | UpdateMapSignal(row,j2,ntrack,idhit,module,pulse2,pList); | |
572 | flag = 0; | |
573 | } // end if | |
574 | } while(flag == 0); | |
575 | } // for isign | |
21b825a4 | 576 | } |
c7a4dac0 | 577 | //______________________________________________________________________ |
578 | void AliITSsimulationSPD::CreateDigit(Int_t module,AliITSpList *pList) { | |
579 | // The pixels are fired if the energy deposited inside them is above | |
580 | // the threshold parameter ethr. Fired pixed are interpreted as digits | |
581 | // and stored in the file digitfilename. One also needs to write out | |
582 | // cases when there is only noise (nhits==0). | |
583 | ||
584 | static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); | |
585 | ||
ee86d557 | 586 | Int_t size = AliITSdigitSPD::GetNTracks(); |
587 | Int_t digits[size]; | |
588 | Int_t tracks[size]; | |
589 | Int_t hits[size]; | |
590 | Float_t charges[size]; | |
c7a4dac0 | 591 | Int_t j1; |
592 | ||
593 | for (Int_t r=1;r<=GetNPixelsZ();r++) { | |
594 | for (Int_t c=1;c<=GetNPixelsX();c++) { | |
595 | // check if the deposited energy in a pixel is above the | |
596 | // threshold | |
597 | Float_t signal = (Float_t) fMapA2->GetSignal(r,c); | |
598 | if ( signal > GetThreshold()) { | |
599 | digits[0] = r-1; // digits starts from 0 | |
600 | digits[1] = c-1; // digits starts from 0 | |
601 | //digits[2] = 1; | |
602 | digits[2] = (Int_t) signal; // the signal is stored in | |
603 | // electrons | |
ee86d557 | 604 | for(j1=0;j1<size;j1++){ |
605 | if(j1<pList->GetNEnteries()){ | |
606 | tracks[j1] = pList->GetTrack(r,c,j1); | |
607 | hits[j1] = pList->GetHit(r,c,j1); | |
608 | }else{ | |
609 | tracks[j1] = -3; | |
610 | hits[j1] = -1; | |
611 | } // end if | |
21b825a4 | 612 | charges[j1] = 0; |
c7a4dac0 | 613 | } // end for j1 |
3a97c582 | 614 | Float_t phys = 0; |
c7a4dac0 | 615 | aliITS->AddSimDigit(0,phys,digits,tracks,hits,charges); |
bb6b39bf | 616 | #ifdef DEBUG |
617 | cout << " CreateSPDDigit mod=" << fModule << " r,c=" << r; | |
618 | cout <<","<<c<< " sig=" << fpList->GetSignalOnly(r,c); | |
619 | cout << " noise=" << fpList->GetNoise(r,c); | |
620 | cout << " Msig="<< signal << " Thres=" << GetThreshold()<<endl; | |
621 | #endif | |
c7a4dac0 | 622 | } // end if of threshold condition |
623 | } // for c | |
624 | }// end do on pixels | |
21b825a4 | 625 | } |
c7a4dac0 | 626 | //______________________________________________________________________ |
627 | void AliITSsimulationSPD::SetFluctuations(AliITSpList *pList,Int_t module) { | |
628 | // Set the electronic noise and threshold non-uniformities to all the | |
629 | // pixels in a detector. | |
630 | // The parameter fSigma is the squared sum of the sigma due to noise | |
631 | // and the sigma of the threshold distribution among pixels. | |
632 | // | |
633 | //Begin_Html | |
634 | /* | |
635 | <img src="picts/ITS/barimodel_1.gif"> | |
636 | </pre> | |
637 | <br clear=left> | |
638 | <font size=+2 color=red> | |
639 | <a href="mailto:Rocco.Caliandro@ba.infn.it"></a>. | |
640 | </font> | |
641 | <pre> | |
642 | */ | |
643 | //End_Html | |
644 | Float_t thr=0.0,sigm=0.0; | |
645 | Double_t signal,sigma; | |
646 | Int_t iz,ix; | |
647 | ||
648 | GetThresholds(thr,sigm); | |
649 | sigma = (Double_t) sigm; | |
650 | for(iz=1;iz<=GetNPixelsZ();iz++){ | |
651 | for(ix=1;ix<=GetNPixelsX();ix++){ | |
652 | signal = sigma*gRandom->Gaus(); | |
653 | fMapA2->SetHit(iz,ix,signal); | |
654 | // insert in the label-signal-hit list the pixels fired | |
655 | // only by noise | |
656 | pList->AddNoise(iz,ix,module,signal); | |
657 | } // end of loop on pixels | |
21b825a4 | 658 | } // end of loop on pixels |
c7a4dac0 | 659 | } |
660 | //______________________________________________________________________ | |
661 | void AliITSsimulationSPD::SetMask() { | |
662 | // Apply a mask to the SPD module. 1% of the pixel channels are | |
663 | // masked. When the database will be ready, the masked pixels | |
664 | // should be read from it. | |
665 | Double_t signal; | |
666 | Int_t iz,ix,im; | |
667 | Float_t totMask; | |
668 | Float_t perc = ((AliITSresponseSPD*)fResponse)->GetFractionDead(); | |
669 | // in this way we get the same set of random numbers for all runs. | |
670 | // This is a cluge for now. | |
671 | static TRandom *rnd = new TRandom(); | |
672 | ||
673 | totMask= perc*GetNPixelsZ()*GetNPixelsX(); | |
674 | for(im=1;im<totMask;im++){ | |
675 | do{ | |
676 | ix=(Int_t)(rnd->Rndm()*(GetNPixelsX()-1.) + 1.); | |
677 | } while(ix<=0 || ix>GetNPixelsX()); | |
678 | do{ | |
679 | iz=(Int_t)(rnd->Rndm()*(GetNPixelsZ()-1.) + 1.); | |
680 | } while(iz<=0 || iz>GetNPixelsZ()); | |
681 | signal = -1.; | |
682 | fMapA2->SetHit(iz,ix,signal); | |
683 | } // end loop on masked pixels | |
684 | } | |
685 | //______________________________________________________________________ | |
21b825a4 | 686 | void AliITSsimulationSPD::CreateHistograms() { |
c7a4dac0 | 687 | // Create Histograms |
688 | Int_t i; | |
21b825a4 | 689 | |
c7a4dac0 | 690 | fHis=new TObjArray(GetNPixelsZ()); |
691 | for(i=0;i<GetNPixelsZ();i++) { | |
692 | TString spdname("spd_"); | |
693 | Char_t candnum[4]; | |
694 | sprintf(candnum,"%d",i+1); | |
695 | spdname.Append(candnum); | |
696 | (*fHis)[i] = new TH1F(spdname.Data(),"SPD maps", | |
697 | GetNPixelsX(),0.,(Float_t) GetNPixelsX()); | |
698 | } // end for i | |
b0f5e3fc | 699 | } |
c7a4dac0 | 700 | //______________________________________________________________________ |
21b825a4 | 701 | void AliITSsimulationSPD::ResetHistograms() { |
b0f5e3fc | 702 | // Reset histograms for this detector |
21b825a4 | 703 | Int_t i; |
b0f5e3fc | 704 | |
c7a4dac0 | 705 | for(i=0;i<GetNPixelsZ();i++ ) { |
706 | if ((*fHis)[i]) ((TH1F*)(*fHis)[i])->Reset(); | |
707 | } // end for i | |
708 | } | |
709 | //______________________________________________________________________ | |
710 | void AliITSsimulationSPD::WriteSDigits(AliITSpList *pList){ | |
711 | // Fills the Summable digits Tree | |
712 | Int_t i,ni,j,nj; | |
713 | static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); | |
714 | ||
715 | pList->GetMaxMapIndex(ni,nj); | |
716 | for(i=0;i<ni;i++)for(j=0;j<nj;j++){ | |
717 | if(pList->GetSignalOnly(i,j)>0.0){ | |
718 | aliITS->AddSumDigit(*(pList->GetpListItem(i,j))); | |
bb6b39bf | 719 | #ifdef DEBUG |
720 | cout << "pListSPD: " << *(pList->GetpListItem(i,j)) << endl; | |
721 | cout << " CreateSPDSDigit mod=" << fModule << " r,c="; | |
722 | cout << i <<","<< j << " sig=" << fpList->GetSignalOnly(i,j); | |
723 | cout << " noise=" << fpList->GetNoise(i,j) <<endl; | |
724 | #endif | |
c7a4dac0 | 725 | } // end if |
726 | } // end for i,j | |
727 | return; | |
728 | } | |
729 | //______________________________________________________________________ | |
730 | void AliITSsimulationSPD::FillMapFrompList(AliITSpList *pList){ | |
731 | // Fills fMap2A from the pList of Summable digits | |
3a97c582 | 732 | Int_t ix,iz; |
c7a4dac0 | 733 | |
3a97c582 | 734 | for(iz=0;iz<GetNPixelsZ();iz++)for(ix=0;ix<GetNPixelsX();ix++) |
735 | fMapA2->AddSignal(iz,ix,pList->GetSignal(iz,ix)); | |
c7a4dac0 | 736 | return; |
b0f5e3fc | 737 | } |