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f74211b0 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* | |
17 | $Log$ | |
4ae5bbc4 | 18 | Revision 1.8 2002/10/14 14:57:08 hristov |
19 | Merging the VirtualMC branch to the main development branch (HEAD) | |
20 | ||
b9d0a01d | 21 | Revision 1.3.8.2 2002/10/14 13:14:08 hristov |
22 | Updating VirtualMC to v3-09-02 | |
23 | ||
24 | Revision 1.7 2002/09/09 17:23:28 nilsen | |
25 | Minor changes in support of changes to AliITSdigitS?D class'. | |
26 | ||
ee86d557 | 27 | Revision 1.6 2002/08/21 22:09:58 nilsen |
28 | Updated SPD simulation with difusion effects. ReWritten Hit to SDigits | |
29 | code. | |
30 | ||
f74211b0 | 31 | */ |
4ae5bbc4 | 32 | #include <Riostream.h> |
409f8c84 | 33 | #include <TRandom.h> |
34 | #include <TH1.h> | |
35 | #include <TMath.h> | |
36 | #include <TString.h> | |
37 | #include <TParticle.h> | |
38 | ||
409f8c84 | 39 | #include "AliRun.h" |
40 | #include "AliITS.h" | |
41 | #include "AliITShit.h" | |
42 | #include "AliITSdigit.h" | |
43 | #include "AliITSmodule.h" | |
44 | #include "AliITSMapA2.h" | |
2cc6b29a | 45 | #include "AliITSpList.h" |
409f8c84 | 46 | #include "AliITSsimulationSPDdubna.h" |
f74211b0 | 47 | #include "AliITSsegmentationSPD.h" |
48 | #include "AliITSresponseSPDdubna.h" | |
409f8c84 | 49 | |
f74211b0 | 50 | //#define DEBUG |
409f8c84 | 51 | |
52 | ClassImp(AliITSsimulationSPDdubna) | |
53 | //////////////////////////////////////////////////////////////////////// | |
54 | // Version: 0 | |
55 | // Written by Boris Batyunya | |
56 | // December 20 1999 | |
57 | // | |
58 | // AliITSsimulationSPDdubna is the simulation of SPDs | |
2cc6b29a | 59 | //______________________________________________________________________ |
60 | ||
61 | ||
62 | AliITSsimulationSPDdubna::AliITSsimulationSPDdubna(){ | |
63 | // constructor | |
64 | ||
65 | fResponse = 0; | |
66 | fSegmentation = 0; | |
67 | fMapA2 = 0; | |
68 | fpList = 0; | |
69 | fModule = 0; | |
70 | fEvent = 0; | |
71 | fHis = 0; | |
72 | fNoise = 0.; | |
73 | fBaseline = 0.; | |
74 | fNPixelsZ = 0; | |
75 | fNPixelsX = 0; | |
409f8c84 | 76 | } |
2cc6b29a | 77 | //______________________________________________________________________ |
78 | AliITSsimulationSPDdubna::AliITSsimulationSPDdubna(AliITSsegmentation *seg, | |
79 | AliITSresponse *resp){ | |
80 | // standard constructor | |
f74211b0 | 81 | const Double_t kmictocm = 1.0e-4; // convert microns to cm. |
409f8c84 | 82 | |
2cc6b29a | 83 | fHis = 0; |
84 | fResponse = resp; | |
85 | fSegmentation = seg; | |
86 | fModule = 0; | |
87 | fEvent = 0; | |
409f8c84 | 88 | |
2cc6b29a | 89 | fNPixelsZ=fSegmentation->Npz(); |
90 | fNPixelsX=fSegmentation->Npx(); | |
409f8c84 | 91 | |
2cc6b29a | 92 | fResponse->GetNoiseParam(fNoise,fBaseline); |
f74211b0 | 93 | fResponse->SetDistanceOverVoltage(kmictocm*fSegmentation->Dy(),50.0); |
409f8c84 | 94 | |
f74211b0 | 95 | // fMapA2 = new AliITSMapA2(fSegmentation); |
96 | fMapA2 = 0; | |
409f8c84 | 97 | |
2cc6b29a | 98 | fpList = new AliITSpList(fNPixelsZ+1,fNPixelsX+1); |
409f8c84 | 99 | |
2cc6b29a | 100 | } |
101 | //______________________________________________________________________ | |
102 | AliITSsimulationSPDdubna::~AliITSsimulationSPDdubna(){ | |
103 | // destructor | |
409f8c84 | 104 | |
f74211b0 | 105 | if(fMapA2) delete fMapA2; |
409f8c84 | 106 | |
2cc6b29a | 107 | if (fHis) { |
108 | fHis->Delete(); | |
109 | delete fHis; | |
110 | } // end if fHis | |
409f8c84 | 111 | } |
2cc6b29a | 112 | //______________________________________________________________________ |
113 | AliITSsimulationSPDdubna::AliITSsimulationSPDdubna(const | |
114 | AliITSsimulationSPDdubna | |
115 | &source){ | |
116 | // Copy Constructor | |
117 | if(&source == this) return; | |
118 | this->fMapA2 = source.fMapA2; | |
119 | this->fNoise = source.fNoise; | |
120 | this->fBaseline = source.fBaseline; | |
121 | this->fNPixelsX = source.fNPixelsX; | |
122 | this->fNPixelsZ = source.fNPixelsZ; | |
123 | this->fHis = source.fHis; | |
124 | return; | |
125 | } | |
126 | //______________________________________________________________________ | |
127 | AliITSsimulationSPDdubna& AliITSsimulationSPDdubna::operator=(const | |
128 | AliITSsimulationSPDdubna &source){ | |
129 | // Assignment operator | |
130 | if(&source == this) return *this; | |
131 | this->fMapA2 = source.fMapA2; | |
132 | this->fNoise = source.fNoise; | |
133 | this->fBaseline = source.fBaseline; | |
134 | this->fNPixelsX = source.fNPixelsX; | |
135 | this->fNPixelsZ = source.fNPixelsZ; | |
136 | this->fHis = source.fHis; | |
137 | return *this; | |
138 | } | |
139 | //______________________________________________________________________ | |
140 | void AliITSsimulationSPDdubna::InitSimulationModule(Int_t module, Int_t event){ | |
141 | // This function creates maps to build the list of tracks for each | |
142 | // summable digit. | |
143 | // | |
144 | // Inputs: | |
145 | // Int_t module // Module number to be simulated | |
146 | // Int_t event // Event number to be simulated | |
147 | // | |
148 | // Outputs: | |
149 | // none | |
150 | // | |
151 | // Returns: | |
152 | // none | |
409f8c84 | 153 | |
2cc6b29a | 154 | fModule = module; |
155 | fEvent = event; | |
f74211b0 | 156 | // fMapA2->ClearMap(); |
2cc6b29a | 157 | fpList->ClearMap(); |
158 | } | |
159 | //_____________________________________________________________________ | |
160 | void AliITSsimulationSPDdubna::SDigitiseModule(AliITSmodule *mod, Int_t mask, | |
161 | Int_t event){ | |
162 | // This function begins the work of creating S-Digits | |
163 | // | |
164 | // Inputs: | |
165 | // AliITSmodule *mod // module | |
166 | // Int_t mask // mask to be applied to the module | |
167 | // | |
168 | // Outputs: | |
169 | // none | |
170 | // | |
171 | // Return: | |
172 | // test // test returns kTRUE if the module contained hits | |
173 | // // test returns kFALSE if it did not contain hits | |
409f8c84 | 174 | |
2cc6b29a | 175 | Int_t module = 0; |
409f8c84 | 176 | |
2cc6b29a | 177 | if(!(mod->GetNhits())) return;// if module has no hits don't create Sdigits |
178 | fModule = mod->GetIndex(); | |
179 | HitToSDigit(mod, module, mask, fpList); | |
180 | WriteSDigits(fpList); | |
f74211b0 | 181 | // fMapA2->ClearMap(); |
2cc6b29a | 182 | fpList->ClearMap(); |
409f8c84 | 183 | } |
2cc6b29a | 184 | //______________________________________________________________________ |
185 | void AliITSsimulationSPDdubna::WriteSDigits(AliITSpList *pList){ | |
186 | // This function adds each S-Digit to pList | |
187 | // | |
188 | // Inputs: | |
189 | // AliITSpList *pList | |
190 | // | |
191 | // Outputs: | |
192 | // none | |
193 | // | |
194 | // Return: | |
195 | // none | |
7d50ea21 | 196 | Int_t ix, nix, iz, niz; |
2cc6b29a | 197 | static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); |
198 | ||
7d50ea21 | 199 | pList->GetMaxMapIndex(niz, nix); |
200 | for(iz=0; iz<niz; iz++)for(ix=0; ix<nix; ix++){ | |
201 | if(pList->GetSignalOnly(iz,ix)>0.0){ | |
202 | aliITS->AddSumDigit(*(pList->GetpListItem(iz,ix))); | |
f74211b0 | 203 | #ifdef DEBUG |
204 | cout <<"SDigits " << iz << "," << ix << "," << | |
205 | *(pList->GetpListItem(iz,ix)) << endl; | |
206 | #endif | |
2cc6b29a | 207 | } // end if pList |
7d50ea21 | 208 | } // end for iz,ix |
2cc6b29a | 209 | return; |
210 | } | |
211 | //______________________________________________________________________ | |
212 | void AliITSsimulationSPDdubna::FinishSDigitiseModule(){ | |
213 | // This function calls SDigitsToDigits which creates Digits from SDigits | |
214 | // | |
215 | // Inputs: | |
216 | // none | |
217 | // | |
218 | // Outputs: | |
219 | // none | |
220 | // Return | |
221 | // none | |
409f8c84 | 222 | |
2cc6b29a | 223 | SDigitsToDigits(fModule, fpList); |
224 | return; | |
225 | } | |
226 | //______________________________________________________________________ | |
227 | void AliITSsimulationSPDdubna::SDigitsToDigits(Int_t module, | |
228 | AliITSpList *pList){ | |
229 | // This function adds electronic noise to the S-Digits and then adds them | |
230 | // to a new pList | |
231 | // | |
232 | // Inputs: | |
233 | // Int_t module // module number | |
234 | // AliITSpList *pList // pList | |
235 | // | |
236 | // Outputs: | |
237 | // pList is passed along to the functions ChargeToSignal and GetList | |
238 | // | |
239 | // Return: | |
240 | // none | |
409f8c84 | 241 | |
2cc6b29a | 242 | fModule = module; |
243 | ChargeToSignal(pList); // Charge To Signal both adds noise and | |
f74211b0 | 244 | // fMapA2->ClearMap(); |
2cc6b29a | 245 | pList->ClearMap(); |
409f8c84 | 246 | } |
2cc6b29a | 247 | //______________________________________________________________________ |
248 | void AliITSsimulationSPDdubna::DigitiseModule(AliITSmodule *mod, Int_t module, | |
249 | Int_t dummy){ | |
250 | // This function creates Digits straight from the hits and then adds | |
251 | // electronic noise to the digits before adding them to pList | |
252 | // | |
253 | // Inputs: | |
254 | // AliITSmodule *mod // module | |
255 | // Int_t module // module number Dummy. | |
256 | // Int_t dummy | |
257 | // | |
258 | // Outputs: | |
259 | // Each of the input variables is passed along to HitToSDigit | |
260 | // | |
261 | // Return: | |
262 | // none | |
409f8c84 | 263 | |
2cc6b29a | 264 | fModule = mod->GetIndex(); //This calls the module for HitToSDigit |
265 | HitToSDigit(mod,fModule, dummy, fpList); | |
266 | ChargeToSignal(fpList); | |
f74211b0 | 267 | // fMapA2->ClearMap(); |
2cc6b29a | 268 | fpList->ClearMap(); |
269 | } | |
270 | //______________________________________________________________________ | |
7d50ea21 | 271 | void AliITSsimulationSPDdubna::UpdateMapSignal(Int_t iz, Int_t ix, Int_t trk, |
2cc6b29a | 272 | Int_t ht, Int_t module, |
273 | Double_t signal, | |
274 | AliITSpList *pList){ | |
275 | // This function adds a signal to the pList from the pList class | |
276 | // | |
277 | // Inputs: | |
7d50ea21 | 278 | // Int_t iz // row number |
279 | // Int_t ix // column number | |
2cc6b29a | 280 | // Int_t trk // track number |
281 | // Int_t ht // hit number | |
282 | // Double_t signal // signal strength | |
283 | // AliITSpList *pList // pList | |
284 | // | |
285 | // Outputs: | |
286 | // All of the inputs are passed to AliITSpList::AddSignal | |
287 | // Int_t ix // row number | |
288 | // Int_t iz // column number | |
289 | // Double_t sig // signal strength | |
290 | // // These three variables are defined to preserve the | |
291 | // // assignments used in the function AliITSMapA2::AddSignal | |
292 | // | |
293 | // Return: | |
294 | // none | |
2cc6b29a | 295 | |
f74211b0 | 296 | // fMapA2->AddSignal(iz, ix, signal); |
7d50ea21 | 297 | pList->AddSignal(iz,ix, trk, ht, fModule, signal); |
2cc6b29a | 298 | } |
299 | //______________________________________________________________________ | |
7d50ea21 | 300 | void AliITSsimulationSPDdubna::UpdateMapNoise(Int_t iz, |
301 | Int_t ix, Int_t fModule, | |
2cc6b29a | 302 | Double_t sig, Float_t noise, |
303 | AliITSpList *pList){ | |
304 | // This function adds noise to data in the MapA2 as well as the pList | |
305 | // | |
306 | // Inputs: | |
7d50ea21 | 307 | // Int_t iz // row number |
308 | // Int_t ix // column number | |
2cc6b29a | 309 | // Int_t mod // module number |
310 | // Double_t sig // signal strength | |
311 | // Double_t noise // electronic noise generated by ChargeToSignal | |
312 | // AliITSpList *pList // pList | |
313 | // | |
314 | // Outputs: | |
315 | // All of the inputs are passed to AliITSMapA2::AddSignal or | |
316 | // AliITSpList::AddNoise | |
317 | // | |
318 | // Return: | |
319 | // none | |
409f8c84 | 320 | |
f74211b0 | 321 | // fMapA2->AddSignal(iz, ix, noise); |
7d50ea21 | 322 | pList->AddNoise(iz,ix, fModule, noise); |
2cc6b29a | 323 | } |
324 | //______________________________________________________________________ | |
325 | void AliITSsimulationSPDdubna::HitToDigit(AliITSmodule *mod, Int_t module, | |
326 | Int_t dummy){ | |
327 | DigitiseModule(mod, module, dummy); | |
328 | } | |
329 | //______________________________________________________________________ | |
330 | void AliITSsimulationSPDdubna::HitToSDigit(AliITSmodule *mod, Int_t module, | |
f74211b0 | 331 | Int_t dummy,AliITSpList *pList){ |
332 | // Does the charge distributions using Gaussian diffusion charge charing. | |
333 | const Double_t kmictocm = 1.0e-4; // convert microns to cm. | |
334 | TObjArray *hits = mod->GetHits(); | |
335 | Int_t nhits = hits->GetEntriesFast(); | |
336 | Int_t h,ix,iz; | |
337 | Int_t idtrack; | |
338 | Double_t x0=0.0,x1=0.0,y0=0.0,y1=0.0,z0=0.0,z1=0.0,de=0.0; | |
339 | Double_t x,y,z,t,tp,st,dt=0.2,el,sig; | |
340 | Double_t thick = kmictocm*GetSeg()->Dy(); | |
341 | ||
342 | if(nhits<=0) return; | |
343 | for(h=0;h<nhits;h++){ | |
344 | #ifdef DEBUG | |
345 | cout << "Hits=" << h << "," << *(mod->GetHit(h)) << endl; | |
346 | #endif | |
347 | if(mod->LineSegmentL(h,x0,x1,y0,y1,z0,z1,de,idtrack)){ | |
348 | st =TMath::Sqrt(x1*x1+y1*y1+z1*z1); | |
349 | if(st>0.0) for(t=0;t<1.0;t+=dt){ // Integrate over t | |
350 | tp = t+0.5*dt; | |
351 | el = GetResp()->GeVToCharge((Float_t)(dt*de)); | |
352 | #ifdef DEBUG | |
353 | if(el<=0.0) cout << "el="<<el<<" dt="<<dt<<" de="<<de<<endl; | |
354 | #endif | |
355 | x = x0+x1*tp; | |
356 | y = y0+y1*tp; | |
357 | z = z0+z1*tp; | |
358 | GetSeg()->LocalToDet(x,z,ix,iz); | |
359 | sig = GetResp()->SigmaDiffusion1D(thick + y); | |
360 | SpreadCharge(x,y,z,ix,iz,el,sig, | |
361 | idtrack,mod->GetHitTrackIndex(h),h,mod->GetIndex()); | |
362 | } else { // st == 0.0 deposit it at this point | |
363 | el = GetResp()->GeVToCharge((Float_t)de); | |
364 | x = x0; | |
365 | y = y0; | |
366 | z = z0; | |
367 | GetSeg()->LocalToDet(x,z,ix,iz); | |
368 | sig = GetResp()->SigmaDiffusion1D(thick + y); | |
369 | SpreadCharge(x,y,z,ix,iz,el,sig, | |
370 | idtrack,mod->GetHitTrackIndex(h),h,mod->GetIndex()); | |
371 | } // end if st>0.0 | |
372 | }} // Loop over all hits h | |
373 | } | |
374 | //______________________________________________________________________ | |
375 | void AliITSsimulationSPDdubna::SpreadCharge(Double_t x0,Double_t y0, | |
376 | Double_t z0,Int_t ix0,Int_t iz0, | |
377 | Double_t el,Double_t sig,Int_t t, | |
378 | Int_t ti,Int_t hi,Int_t mod){ | |
379 | // Spreads the charge over neighboring cells. Assume charge is distributed | |
380 | // as charge(x,z) = (el/2*pi*sig*sig)*exp(-arg) | |
381 | // arg=((x-x0)*(x-x0)/2*sig*sig)+((z-z0*z-z0)/2*sig*sig) | |
382 | // Defined this way, the integral over all x and z is el. | |
383 | const Int_t knx = 3,knz = 2; | |
384 | const Double_t kRoot2 = 1.414213562; // Sqrt(2). | |
385 | const Double_t kmictocm = 1.0e-4; // convert microns to cm. | |
386 | Int_t ix,iz,ixs,ixe,izs,ize; | |
387 | Float_t x,z; | |
388 | Double_t x1,x2,z1,z2,s,sp; | |
389 | ||
390 | if(sig<=0.0) { | |
391 | fpList->AddSignal(iz0,ix0,t,hi,mod,el); | |
392 | return; | |
393 | } // end if | |
394 | sp = 1.0/(sig*kRoot2); | |
395 | #ifdef DEBUG | |
396 | cout << "sig=" << sig << " sp=" << sp << endl; | |
397 | #endif | |
398 | ixs = TMath::Max(-knx+ix0,0); | |
399 | ixe = TMath::Min(knx+ix0,GetSeg()->Npx()-1); | |
400 | izs = TMath::Max(-knz+iz0,0); | |
401 | ize = TMath::Min(knz+iz0,GetSeg()->Npz()-1); | |
402 | for(ix=ixs;ix<=ixe;ix++) for(iz=izs;iz<=ize;iz++){ | |
403 | GetSeg()->DetToLocal(ix,iz,x,z); // pixel center | |
404 | x1 = x; | |
405 | z1 = z; | |
406 | x2 = x1 + 0.5*kmictocm*GetSeg()->Dpx(ix); // Upper | |
407 | x1 -= 0.5*kmictocm*GetSeg()->Dpx(ix); // Lower | |
408 | z2 = z1 + 0.5*kmictocm*GetSeg()->Dpz(iz); // Upper | |
409 | z1 -= 0.5*kmictocm*GetSeg()->Dpz(iz); // Lower | |
410 | x1 -= x0; // Distance from where track traveled | |
411 | x2 -= x0; // Distance from where track traveled | |
412 | z1 -= z0; // Distance from where track traveled | |
413 | z2 -= z0; // Distance from where track traveled | |
414 | s = 0.25; // Correction based on definision of Erfc | |
415 | s *= TMath::Erfc(sp*x1) - TMath::Erfc(sp*x2); | |
416 | #ifdef DEBUG | |
417 | cout << "el=" << el << " ix0=" << ix0 << " ix=" << ix << " x0="<< x << | |
418 | " iz0=" << iz0 << " iz=" << iz << " z0=" << z << | |
419 | " sp*x1=" << sp*x1 <<" sp*x2=" << sp*x2 << " s=" << s; | |
420 | #endif | |
421 | s *= TMath::Erfc(sp*z1) - TMath::Erfc(sp*z2); | |
422 | #ifdef DEBUG | |
423 | cout << " sp*z1=" << sp*z1 <<" sp*z2=" << sp*z2 << " s=" << s << endl; | |
424 | #endif | |
425 | fpList->AddSignal(iz,ix,t,hi,mod,s*el); | |
426 | } // end for ix, iz | |
427 | } | |
428 | //______________________________________________________________________ | |
429 | void AliITSsimulationSPDdubna::HitToSDigitOld(AliITSmodule *mod, Int_t module, | |
2cc6b29a | 430 | Int_t dummy, AliITSpList *pList){ |
431 | // digitize module | |
409f8c84 | 432 | const Float_t kEnToEl = 2.778e+8; // GeV->charge in electrons |
433 | // for 3.6 eV/pair | |
434 | const Float_t kconv = 10000.; // cm -> microns | |
435 | ||
436 | Float_t spdLength = fSegmentation->Dz(); | |
437 | Float_t spdWidth = fSegmentation->Dx(); | |
338e4f06 | 438 | Float_t spdThickness = fSegmentation->Dy(); |
409f8c84 | 439 | Float_t difCoef, dum; |
440 | fResponse->DiffCoeff(difCoef,dum); | |
338e4f06 | 441 | if(spdThickness > 290) difCoef = 0.00613; |
409f8c84 | 442 | |
443 | Float_t zPix0 = 1e+6; | |
444 | Float_t xPix0 = 1e+6; | |
445 | Float_t yPrev = 1e+6; | |
446 | ||
447 | Float_t zPitch = fSegmentation->Dpz(0); | |
448 | Float_t xPitch = fSegmentation->Dpx(0); | |
449 | ||
450 | TObjArray *fHits = mod->GetHits(); | |
2cc6b29a | 451 | module = mod->GetIndex(); |
409f8c84 | 452 | Int_t nhits = fHits->GetEntriesFast(); |
453 | if (!nhits) return; | |
f74211b0 | 454 | #ifdef DEBUG |
2cc6b29a | 455 | cout<<"len,wid,thickness,nx,nz,pitchx,pitchz,difcoef ="<<spdLength<<"," |
456 | <<spdWidth<<","<<spdThickness<<","<<fNPixelsX<<","<<fNPixelsZ<<"," | |
457 | <<xPitch<<","<<zPitch<<","<<difCoef<<endl; | |
f74211b0 | 458 | #endif |
2cc6b29a | 459 | // Array of pointers to the label-signal list |
409f8c84 | 460 | Int_t indexRange[4] = {0,0,0,0}; |
461 | ||
462 | // Fill detector maps with GEANT hits | |
463 | // loop over hits in the module | |
464 | static Bool_t first; | |
465 | Int_t lasttrack=-2; | |
466 | Int_t hit, iZi, jz, jx; | |
338e4f06 | 467 | Int_t idhit=-1; //! |
f74211b0 | 468 | #ifdef DEBUG |
338e4f06 | 469 | cout<<"SPDdubna: module,nhits ="<<module<<","<<nhits<<endl; |
f74211b0 | 470 | #endif |
409f8c84 | 471 | for (hit=0;hit<nhits;hit++) { |
472 | AliITShit *iHit = (AliITShit*) fHits->At(hit); | |
f74211b0 | 473 | #ifdef DEBUG |
474 | cout << "Hits=" << hit << "," << *iHit << endl; | |
475 | #endif | |
338e4f06 | 476 | //Int_t layer = iHit->GetLayer(); |
477 | Float_t yPix0 = -spdThickness/2; | |
478 | ||
479 | // work with the idtrack=entry number in the TreeH | |
480 | //Int_t idhit,idtrack; //! | |
481 | //mod->GetHitTrackAndHitIndex(hit,idtrack,idhit); //! | |
482 | //Int_t idtrack=mod->GetHitTrackIndex(hit); | |
483 | // or store straight away the particle position in the array | |
484 | // of particles : | |
409f8c84 | 485 | if(iHit->StatusEntering()) idhit=hit; |
486 | Int_t itrack = iHit->GetTrack(); | |
487 | Int_t dray = 0; | |
488 | ||
489 | if (lasttrack != itrack || hit==(nhits-1)) first = kTRUE; | |
490 | ||
338e4f06 | 491 | //Int_t parent = iHit->GetParticle()->GetFirstMother(); |
409f8c84 | 492 | Int_t partcode = iHit->GetParticle()->GetPdgCode(); |
493 | ||
2cc6b29a | 494 | // partcode (pdgCode): 11 - e-, 13 - mu-, 22 - gamma, 111 - pi0, |
495 | // 211 - pi+, 310 - K0s, 321 - K+, 2112 - n, 2212 - p, 3122 - lambda | |
409f8c84 | 496 | |
497 | Float_t pmod = iHit->GetParticle()->P(); // total momentum at the | |
498 | // vertex | |
499 | pmod *= 1000; | |
500 | ||
409f8c84 | 501 | if(partcode == 11 && pmod < 6) dray = 1; // delta ray is e- |
502 | // at p < 6 MeV/c | |
503 | ||
409f8c84 | 504 | // Get hit z and x(r*phi) cordinates for each module (detector) |
505 | // in local system. | |
506 | ||
507 | Float_t zPix = kconv*iHit->GetZL(); | |
508 | Float_t xPix = kconv*iHit->GetXL(); | |
509 | Float_t yPix = kconv*iHit->GetYL(); | |
510 | ||
511 | // Get track status | |
512 | Int_t status = iHit->GetTrackStatus(); | |
409f8c84 | 513 | |
514 | // Check boundaries | |
515 | if(zPix > spdLength/2) { | |
f74211b0 | 516 | #ifdef DEBUG |
517 | cout<<"!!! SPD: z outside ="<<zPix<<endl; | |
518 | #endif | |
2cc6b29a | 519 | zPix = spdLength/2 - 10; |
409f8c84 | 520 | } |
521 | if(zPix < 0 && zPix < -spdLength/2) { | |
f74211b0 | 522 | #ifdef DEBUG |
523 | cout<<"!!! SPD: z outside ="<<zPix<<endl; | |
524 | #endif | |
2cc6b29a | 525 | zPix = -spdLength/2 + 10; |
409f8c84 | 526 | } |
527 | if(xPix > spdWidth/2) { | |
f74211b0 | 528 | #ifdef DEBUG |
529 | cout<<"!!! SPD: x outside ="<<xPix<<endl; | |
530 | #endif | |
2cc6b29a | 531 | xPix = spdWidth/2 - 10; |
409f8c84 | 532 | } |
533 | if(xPix < 0 && xPix < -spdWidth/2) { | |
f74211b0 | 534 | #ifdef DEBUG |
535 | cout<<"!!! SPD: x outside ="<<xPix<<endl; | |
536 | #endif | |
2cc6b29a | 537 | xPix = -spdWidth/2 + 10; |
409f8c84 | 538 | } |
539 | Int_t trdown = 0; | |
540 | ||
541 | // enter Si or after event in Si | |
542 | if (status == 66 ) { | |
2cc6b29a | 543 | zPix0 = zPix; |
544 | xPix0 = xPix; | |
545 | yPrev = yPix; | |
546 | } // end if status == 66 | |
409f8c84 | 547 | |
548 | Float_t depEnergy = iHit->GetIonization(); | |
549 | // skip if the input point to Si | |
550 | ||
551 | if(depEnergy <= 0.) continue; | |
552 | ||
553 | // if track returns to the opposite direction: | |
554 | if (yPix < yPrev) { | |
555 | trdown = 1; | |
2cc6b29a | 556 | } // end if yPix < yPrev |
409f8c84 | 557 | |
558 | // take into account the holes diffusion inside the Silicon | |
559 | // the straight line between the entrance and exit points in Si is | |
560 | // divided into the several steps; the diffusion is considered | |
561 | // for each end point of step and charge | |
562 | // is distributed between the pixels through the diffusion. | |
409f8c84 | 563 | |
564 | // ---------- the diffusion in Z (beam) direction ------- | |
409f8c84 | 565 | Float_t charge = depEnergy*kEnToEl; // charge in e- |
566 | Float_t drPath = 0.; | |
567 | Float_t tang = 0.; | |
568 | Float_t sigmaDif = 0.; | |
569 | Float_t zdif = zPix - zPix0; | |
570 | Float_t xdif = xPix - xPix0; | |
571 | Float_t ydif = TMath::Abs(yPix - yPrev); | |
572 | Float_t ydif0 = TMath::Abs(yPrev - yPix0); | |
573 | ||
574 | if(ydif < 1) continue; // ydif is not zero | |
575 | ||
576 | Float_t projDif = sqrt(xdif*xdif + zdif*zdif); | |
577 | ||
578 | Int_t ndZ = (Int_t)TMath::Abs(zdif/zPitch) + 1; | |
579 | Int_t ndX = (Int_t)TMath::Abs(xdif/xPitch) + 1; | |
580 | ||
581 | // number of the steps along the track: | |
582 | Int_t nsteps = ndZ; | |
583 | if(ndX > ndZ) nsteps = ndX; | |
338e4f06 | 584 | if(nsteps < 20) nsteps = 20; // minimum number of the steps |
409f8c84 | 585 | |
586 | if (projDif < 5 ) { | |
2cc6b29a | 587 | drPath = (yPix-yPix0)*1.e-4; |
588 | drPath = TMath::Abs(drPath); // drift path in cm | |
589 | sigmaDif = difCoef*sqrt(drPath); // sigma diffusion in cm | |
590 | sigmaDif = sigmaDif*kconv; // sigma diffusion in microns | |
591 | nsteps = 1; | |
592 | } // end if projDif < 5 | |
409f8c84 | 593 | |
594 | if(projDif > 5) tang = ydif/projDif; | |
595 | Float_t dCharge = charge/nsteps; // charge in e- for one step | |
596 | Float_t dZ = zdif/nsteps; | |
597 | Float_t dX = xdif/nsteps; | |
598 | ||
2cc6b29a | 599 | for (iZi = 1; iZi <= nsteps;iZi++) { |
600 | Float_t dZn = iZi*dZ; | |
409f8c84 | 601 | Float_t dXn = iZi*dX; |
602 | Float_t zPixn = zPix0 + dZn; | |
603 | Float_t xPixn = xPix0 + dXn; | |
604 | ||
605 | if(projDif >= 5) { | |
2cc6b29a | 606 | Float_t dProjn = sqrt(dZn*dZn+dXn*dXn); |
607 | drPath = dProjn*tang*1.e-4; // drift path for iZi+1 step in cm | |
608 | if(trdown == 0) { | |
609 | drPath = TMath::Abs(drPath) + ydif0*1.e-4; | |
610 | }// end if trdow ==0 | |
611 | if(trdown == 1) { | |
612 | drPath = ydif0*1.e-4 - TMath::Abs(drPath); | |
613 | drPath = TMath::Abs(drPath); | |
614 | } // end if trdown == 1 | |
615 | sigmaDif = difCoef*sqrt(drPath); | |
616 | sigmaDif = sigmaDif*kconv; // sigma diffusion in microns | |
617 | } // end if projdif >= 5 | |
409f8c84 | 618 | |
619 | zPixn = (zPixn + spdLength/2.); | |
620 | xPixn = (xPixn + spdWidth/2.); | |
621 | Int_t nZpix, nXpix; | |
622 | fSegmentation->GetPadIxz(xPixn,zPixn,nXpix,nZpix); | |
623 | zPitch = fSegmentation->Dpz(nZpix); | |
624 | fSegmentation->GetPadTxz(xPixn,zPixn); | |
625 | // set the window for the integration | |
626 | Int_t jzmin = 1; | |
627 | Int_t jzmax = 3; | |
628 | if(nZpix == 1) jzmin =2; | |
629 | if(nZpix == fNPixelsZ) jzmax = 2; | |
630 | ||
631 | Int_t jxmin = 1; | |
632 | Int_t jxmax = 3; | |
633 | if(nXpix == 1) jxmin =2; | |
634 | if(nXpix == fNPixelsX) jxmax = 2; | |
635 | ||
636 | Float_t zpix = nZpix; | |
637 | Float_t dZright = zPitch*(zpix - zPixn); | |
638 | Float_t dZleft = zPitch - dZright; | |
639 | ||
640 | Float_t xpix = nXpix; | |
641 | Float_t dXright = xPitch*(xpix - xPixn); | |
642 | Float_t dXleft = xPitch - dXright; | |
643 | ||
644 | Float_t dZprev = 0.; | |
645 | Float_t dZnext = 0.; | |
646 | Float_t dXprev = 0.; | |
647 | Float_t dXnext = 0.; | |
648 | ||
649 | for(jz=jzmin; jz <=jzmax; jz++) { | |
650 | if(jz == 1) { | |
2cc6b29a | 651 | dZprev = -zPitch - dZleft; |
652 | dZnext = -dZleft; | |
653 | } else if(jz == 2) { | |
654 | dZprev = -dZleft; | |
655 | dZnext = dZright; | |
656 | } else if(jz == 3) { | |
657 | dZprev = dZright; | |
658 | dZnext = dZright + zPitch; | |
659 | } // end if jz | |
409f8c84 | 660 | // kz changes from 1 to the fNofPixels(270) |
661 | Int_t kz = nZpix + jz -2; | |
662 | ||
663 | Float_t zArg1 = dZprev/sigmaDif; | |
664 | Float_t zArg2 = dZnext/sigmaDif; | |
665 | Float_t zProb1 = TMath::Erfc(zArg1); | |
666 | Float_t zProb2 = TMath::Erfc(zArg2); | |
667 | Float_t dZCharge =0.5*(zProb1-zProb2)*dCharge; | |
668 | ||
669 | ||
670 | // ----------- holes diffusion in X(r*phi) direction -------- | |
671 | ||
672 | if(dZCharge > 1.) { | |
2cc6b29a | 673 | for(jx=jxmin; jx <=jxmax; jx++) { |
674 | if(jx == 1) { | |
675 | dXprev = -xPitch - dXleft; | |
676 | dXnext = -dXleft; | |
677 | } else if(jx == 2) { | |
678 | dXprev = -dXleft; | |
679 | dXnext = dXright; | |
680 | } else if(jx == 3) { | |
681 | dXprev = dXright; | |
682 | dXnext = dXright + xPitch; | |
683 | } // end if jx | |
684 | Int_t kx = nXpix + jx -2; | |
685 | Float_t xArg1 = dXprev/sigmaDif; | |
686 | Float_t xArg2 = dXnext/sigmaDif; | |
687 | Float_t xProb1 = TMath::Erfc(xArg1); | |
688 | Float_t xProb2 = TMath::Erfc(xArg2); | |
689 | Float_t dXCharge =0.5*(xProb1-xProb2)*dZCharge; | |
690 | ||
691 | if(dXCharge > 1.) { | |
2cc6b29a | 692 | if (first) { |
f74211b0 | 693 | indexRange[0]=indexRange[1]=kz-1; |
2cc6b29a | 694 | indexRange[2]=indexRange[3]=kx-1; |
695 | first=kFALSE; | |
696 | } // end if first | |
697 | indexRange[0]=TMath::Min(indexRange[0],kz-1); | |
698 | indexRange[1]=TMath::Max(indexRange[1],kz-1); | |
699 | indexRange[2]=TMath::Min(indexRange[2],kx-1); | |
700 | indexRange[3]=TMath::Max(indexRange[3],kx-1); | |
f74211b0 | 701 | /* |
2cc6b29a | 702 | // build the list of digits for this module |
f74211b0 | 703 | Double_t signal = fMapA2->GetSignal(kz-1,kx-1); |
2cc6b29a | 704 | signal+=dXCharge; |
f74211b0 | 705 | fMapA2->SetHit(kz-1,kx-1,(double)signal); |
706 | */ | |
2cc6b29a | 707 | // The calling sequence for UpdateMapSignal was |
708 | // moved into the (dx > 1 e-) loop because it | |
709 | // needs to call signal which is defined inside | |
710 | // this loop | |
2cc6b29a | 711 | fModule = module;//Defined because functions |
712 | // called by UpdateMapSignal | |
713 | // expect module to be an | |
714 | // integer | |
7d50ea21 | 715 | UpdateMapSignal(kz-1,kx-1, |
ee86d557 | 716 | // mod->GetHitTrackIndex(hit), |
717 | ((AliITShit*)(mod->GetHit(hit)))->GetTrack(), | |
f74211b0 | 718 | hit,fModule,dXCharge,pList); |
2cc6b29a | 719 | } // dXCharge > 1 e- |
720 | } // jx loop | |
409f8c84 | 721 | } // dZCharge > 1 e- |
722 | } // jz loop | |
723 | } // iZi loop | |
409f8c84 | 724 | if (status == 65) { // the step is inside of Si |
2cc6b29a | 725 | zPix0 = zPix; |
726 | xPix0 = xPix; | |
727 | } // end if status == 65 | |
728 | yPrev = yPix; | |
409f8c84 | 729 | } // hit loop inside the module |
409f8c84 | 730 | } |
2cc6b29a | 731 | //______________________________________________________________________ |
732 | void AliITSsimulationSPDdubna::ChargeToSignal(AliITSpList *pList){ | |
733 | // add noise and electronics, perform the zero suppression and add the | |
734 | // digit to the list | |
f74211b0 | 735 | static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); |
2cc6b29a | 736 | Float_t threshold = (float)fResponse->MinVal(); |
f74211b0 | 737 | Int_t j; |
738 | // Int_t digits[3], tracks[3], hits[3]; | |
739 | // Float_t charges[3]; | |
2cc6b29a | 740 | Float_t electronics; |
f74211b0 | 741 | // Float_t phys; |
2cc6b29a | 742 | Double_t sig; |
ee86d557 | 743 | const Int_t nmaxtrk=AliITSdigitSPD::GetNTracks(); |
f74211b0 | 744 | static AliITSdigitSPD dig; |
745 | ||
2cc6b29a | 746 | for(Int_t iz=0; iz<fNPixelsZ; iz++){ |
747 | for(Int_t ix=0; ix<fNPixelsX; ix++){ | |
748 | electronics = fBaseline + fNoise*gRandom->Gaus(); | |
f74211b0 | 749 | sig = pList->GetSignalOnly(iz,ix); |
750 | UpdateMapNoise(iz,ix,fModule,sig,electronics,pList); | |
751 | #ifdef DEBUG | |
752 | // cout << sig << "+" << electronics <<">threshold=" << threshold | |
753 | // << endl; | |
754 | #endif | |
755 | if (sig+electronics > threshold) { | |
756 | dig.fCoord1 = iz; | |
757 | dig.fCoord2 = ix; | |
758 | dig.fSignal = 1; | |
759 | dig.fSignalSPD = (Int_t) pList->GetSignal(iz,ix); | |
760 | /* | |
761 | digits[0] = iz; | |
762 | digits[1] = ix; | |
763 | digits[2] = 1; */ | |
764 | for(j=0;j<nmaxtrk;j++){ | |
765 | // charges[j] = 0.0; | |
ee86d557 | 766 | if (j<pList->GetNEnteries()) { |
f74211b0 | 767 | dig.fTracks[j] = pList->GetTrack(iz,ix,j); |
768 | dig.fHits[j] = pList->GetHit(iz,ix,j); | |
769 | /* | |
770 | tracks[j] = pList->GetTrack(iz,ix,j); | |
771 | hits[j] = pList->GetHit(iz,ix,j); | |
772 | */ | |
773 | }else { // Default values | |
ee86d557 | 774 | dig.fTracks[j] = -3; |
775 | dig.fHits[j] = -1; | |
f74211b0 | 776 | /* tracks[j] = -2; //noise |
777 | hits[j] = -1; */ | |
2cc6b29a | 778 | } // end if pList |
f74211b0 | 779 | } // end for j |
780 | // charges[0] = (Float_t) pList->GetSumSignal(iz,ix); | |
781 | /* | |
2cc6b29a | 782 | if(tracks[0] == tracks[1] && tracks[0] == tracks[2]) { |
783 | tracks[1] = -3; | |
784 | hits[1] = -1; | |
785 | tracks[2] = -3; | |
786 | hits[2] = -1; | |
787 | } else if(tracks[0] == tracks[1] && tracks[0] != tracks[2]) { | |
788 | tracks[1] = -3; | |
789 | hits[1] = -1; | |
790 | } else if(tracks[0] == tracks[2] && tracks[0] != tracks[1]) { | |
791 | tracks[2] = -3; | |
792 | hits[2] = -1; | |
793 | } else if(tracks[1] == tracks[2] && tracks[0] != tracks[1]) { | |
794 | tracks[2] = -3; | |
795 | hits[2] = -1; | |
796 | } // end if | |
f74211b0 | 797 | */ |
798 | // phys = 0.0; | |
799 | #ifdef DEBUG | |
800 | cout << iz << "," << ix << "," << | |
801 | *(pList->GetpListItem(iz,ix)) << endl; | |
802 | #endif | |
803 | // aliITS->AddSimDigit(0, phys, digits, tracks, hits, charges); | |
804 | aliITS->AddSimDigit(0,&dig); | |
2cc6b29a | 805 | } // |
806 | } // | |
807 | } // | |
409f8c84 | 808 | } |
2cc6b29a | 809 | //______________________________________________________________________ |
810 | void AliITSsimulationSPDdubna::CreateHistograms(){ | |
811 | // create 1D histograms for tests | |
812 | ||
813 | printf("SPD - create histograms\n"); | |
814 | ||
815 | fHis=new TObjArray(fNPixelsZ); | |
816 | TString spdName("spd_"); | |
817 | for (Int_t i=0;i<fNPixelsZ;i++) { | |
818 | Char_t pixelz[4]; | |
819 | sprintf(pixelz,"%d",i+1); | |
820 | spdName.Append(pixelz); | |
821 | //PH (*fHis)[i] = new TH1F(spdName.Data(),"SPD maps", | |
822 | //PH fNPixelsX,0.,(Float_t) fNPixelsX); | |
823 | fHis->AddAt(new TH1F(spdName.Data(),"SPD maps", | |
824 | fNPixelsX,0.,(Float_t) fNPixelsX), i); | |
825 | } // end for i | |
409f8c84 | 826 | } |
2cc6b29a | 827 | //______________________________________________________________________ |
828 | void AliITSsimulationSPDdubna::ResetHistograms(){ | |
409f8c84 | 829 | // |
830 | // Reset histograms for this detector | |
831 | // | |
832 | ||
833 | for ( int i=0;i<fNPixelsZ;i++ ) { | |
2cc6b29a | 834 | //PH if ((*fHis)[i]) ((TH1F*)(*fHis)[i])->Reset(); |
2682e810 | 835 | if (fHis->At(i)) ((TH1F*)fHis->At(i))->Reset(); |
2cc6b29a | 836 | } // end for i |
409f8c84 | 837 | } |