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7587f5a5 | 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 | ||
b2a60966 | 16 | /* $Id$ */ |
5f20d3fb | 17 | |
7587f5a5 | 18 | //_________________________________________________________________________ |
5f20d3fb | 19 | // Implementation version v1 of PHOS Manager class |
a3dfe79c | 20 | //--- |
21 | // Layout EMC + PPSD has name GPS2: | |
ed4205d8 | 22 | // Produces cumulated hits |
a3dfe79c | 23 | //--- |
24 | // Layout EMC + CPV has name IHEP: | |
ed4205d8 | 25 | // Produces hits for CPV, cumulated hits |
26 | //--- | |
27 | // Layout EMC + CPV + PPSD has name GPS: | |
28 | // Produces hits for CPV, cumulated hits | |
29 | //--- | |
5f20d3fb | 30 | //*-- Author: Yves Schutz (SUBATECH) |
b2a60966 | 31 | |
7587f5a5 | 32 | |
33 | // --- ROOT system --- | |
bea63bea | 34 | |
35 | #include "TBRIK.h" | |
36 | #include "TNode.h" | |
7587f5a5 | 37 | #include "TRandom.h" |
94de3818 | 38 | #include "TTree.h" |
f6d1e5e1 | 39 | #include "TParticle.h" |
7587f5a5 | 40 | |
41 | // --- Standard library --- | |
42 | ||
de9ec31b | 43 | #include <string.h> |
44 | #include <stdlib.h> | |
7587f5a5 | 45 | |
46 | // --- AliRoot header files --- | |
47 | ||
48 | #include "AliPHOSv1.h" | |
49 | #include "AliPHOSHit.h" | |
97cee223 | 50 | #include "AliPHOSCPVDigit.h" |
7587f5a5 | 51 | #include "AliRun.h" |
52 | #include "AliConst.h" | |
97cee223 | 53 | #include "AliPHOSGeometry.h" |
7b326aac | 54 | #include "AliPHOSQAIntCheckable.h" |
55 | #include "AliPHOSQAFloatCheckable.h" | |
56 | #include "AliPHOSQAMeanChecker.h" | |
7587f5a5 | 57 | |
58 | ClassImp(AliPHOSv1) | |
59 | ||
bea63bea | 60 | //____________________________________________________________________________ |
02ab1add | 61 | AliPHOSv1::AliPHOSv1(): |
62 | AliPHOSv0() | |
bea63bea | 63 | { |
735e58f1 | 64 | // default ctor: initialze data memebers |
65 | fQAHitsMul = 0 ; | |
66 | fQAHitsMulB = 0 ; | |
67 | fQATotEner = 0 ; | |
68 | fQATotEnerB = 0 ; | |
9688c1dd | 69 | |
70 | fLightYieldMean = 0. ; | |
71 | fIntrinsicPINEfficiency = 0. ; | |
72 | fLightYieldAttenuation = 0. ; | |
73 | fRecalibrationFactor = 0. ; | |
74 | fElectronsPerGeV = 0. ; | |
27f33ee5 | 75 | fAPDGain = 0. ; |
76 | fLightFactor = 0. ; | |
77 | fAPDFactor = 0. ; | |
9688c1dd | 78 | |
bea63bea | 79 | } |
80 | ||
7587f5a5 | 81 | //____________________________________________________________________________ |
82 | AliPHOSv1::AliPHOSv1(const char *name, const char *title): | |
7b326aac | 83 | AliPHOSv0(name,title) |
7587f5a5 | 84 | { |
5f20d3fb | 85 | // |
ed4205d8 | 86 | // We store hits : |
5f20d3fb | 87 | // - fHits (the "normal" one), which retains the hits associated with |
88 | // the current primary particle being tracked | |
89 | // (this array is reset after each primary has been tracked). | |
90 | // | |
fa412d9b | 91 | |
037cc66d | 92 | |
5f20d3fb | 93 | |
94 | // We do not want to save in TreeH the raw hits | |
95 | // But save the cumulated hits instead (need to create the branch myself) | |
96 | // It is put in the Digit Tree because the TreeH is filled after each primary | |
7b326aac | 97 | // and the TreeD at the end of the event (branch is set in FinishEvent() ). |
5f20d3fb | 98 | |
ed4205d8 | 99 | fHits= new TClonesArray("AliPHOSHit",1000) ; |
f6d1e5e1 | 100 | gAlice->AddHitList(fHits) ; |
5f20d3fb | 101 | |
ed4205d8 | 102 | fNhits = 0 ; |
5f20d3fb | 103 | |
f6d1e5e1 | 104 | fIshunt = 2 ; // All hits are associated with primary particles |
7b326aac | 105 | |
9688c1dd | 106 | //Photoelectron statistics: |
107 | // The light yield is a poissonian distribution of the number of | |
108 | // photons created in the PbWo4 crystal, calculated using following formula | |
109 | // NumberOfPhotons = EnergyLost * LightYieldMean* APDEfficiency * | |
110 | // exp (-LightYieldAttenuation * DistanceToPINdiodeFromTheHit); | |
111 | // LightYieldMean is parameter calculated to be over 47000 photons per GeV | |
112 | // APDEfficiency is 0.02655 | |
113 | // k_0 is 0.0045 from Valery Antonenko | |
114 | // The number of electrons created in the APD is | |
115 | // NumberOfElectrons = APDGain * LightYield | |
116 | // The APD Gain is 300 | |
117 | fLightYieldMean = 47000; | |
118 | fIntrinsicPINEfficiency = 0.02655 ; //APD= 0.1875/0.1271 * 0.018 (PIN) | |
27f33ee5 | 119 | fLightYieldAttenuation = 0.0045 ; |
120 | fRecalibrationFactor = 13.418/ fLightYieldMean ; | |
121 | fElectronsPerGeV = 2.77e+8 ; | |
122 | fAPDGain = 300. ; | |
123 | fLightFactor = fLightYieldMean * fIntrinsicPINEfficiency ; | |
124 | fAPDFactor = (fRecalibrationFactor/100.) * fAPDGain ; | |
125 | ||
9688c1dd | 126 | |
fa7cce36 | 127 | Int_t nb = GetGeometry()->GetNModules() ; |
fa412d9b | 128 | |
7b326aac | 129 | // create checkables |
130 | fQAHitsMul = new AliPHOSQAIntCheckable("HitsM") ; | |
131 | fQATotEner = new AliPHOSQAFloatCheckable("TotEn") ; | |
9bc230c0 | 132 | fQAHitsMulB = new TClonesArray("AliPHOSQAIntCheckable",nb) ; |
133 | fQAHitsMulB->SetOwner() ; | |
7b326aac | 134 | fQATotEnerB = new TClonesArray("AliPHOSQAFloatCheckable", nb); |
9bc230c0 | 135 | fQATotEnerB->SetOwner() ; |
7b326aac | 136 | char tempo[20] ; |
137 | Int_t i ; | |
138 | for ( i = 0 ; i < nb ; i++ ) { | |
139 | sprintf(tempo, "HitsMB%d", i+1) ; | |
140 | new( (*fQAHitsMulB)[i]) AliPHOSQAIntCheckable(tempo) ; | |
141 | sprintf(tempo, "TotEnB%d", i+1) ; | |
142 | new( (*fQATotEnerB)[i] ) AliPHOSQAFloatCheckable(tempo) ; | |
143 | } | |
144 | ||
7b326aac | 145 | AliPHOSQAMeanChecker * hmc = new AliPHOSQAMeanChecker("HitsMul", 100. ,25.) ; |
146 | AliPHOSQAMeanChecker * emc = new AliPHOSQAMeanChecker("TotEner", 10. ,5.) ; | |
147 | AliPHOSQAMeanChecker * bhmc = new AliPHOSQAMeanChecker("HitsMulB", 100. ,5.) ; | |
148 | AliPHOSQAMeanChecker * bemc = new AliPHOSQAMeanChecker("TotEnerB", 2. ,.5) ; | |
149 | ||
150 | // associate checkables and checkers | |
151 | fQAHitsMul->AddChecker(hmc) ; | |
152 | fQATotEner->AddChecker(emc) ; | |
153 | for ( i = 0 ; i < nb ; i++ ) { | |
29b077b5 | 154 | (static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[i]))->AddChecker(bhmc) ; |
155 | (static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[i]))->AddChecker(bemc) ; | |
7b326aac | 156 | } |
7b7c1533 | 157 | |
5f20d3fb | 158 | } |
159 | ||
7587f5a5 | 160 | //____________________________________________________________________________ |
bea63bea | 161 | AliPHOSv1::~AliPHOSv1() |
b2a60966 | 162 | { |
bea63bea | 163 | // dtor |
5f20d3fb | 164 | |
ed4205d8 | 165 | if ( fHits) { |
166 | fHits->Delete() ; | |
167 | delete fHits ; | |
168 | fHits = 0 ; | |
8dfa469d | 169 | } |
9bc230c0 | 170 | |
9bc230c0 | 171 | if ( fQAHitsMulB ) { |
172 | fQAHitsMulB->Delete() ; | |
173 | delete fQAHitsMulB ; | |
174 | } | |
175 | ||
176 | if ( fQATotEnerB ) { | |
177 | fQATotEnerB->Delete() ; | |
178 | delete fQATotEnerB ; | |
179 | } | |
180 | ||
7587f5a5 | 181 | } |
182 | ||
7587f5a5 | 183 | //____________________________________________________________________________ |
b37750a6 | 184 | void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits) |
bea63bea | 185 | { |
186 | // Add a hit to the hit list. | |
f6d1e5e1 | 187 | // A PHOS hit is the sum of all hits in a single crystal from one primary and within some time gate |
bea63bea | 188 | |
5f20d3fb | 189 | Int_t hitCounter ; |
bea63bea | 190 | AliPHOSHit *newHit ; |
5f20d3fb | 191 | AliPHOSHit *curHit ; |
192 | Bool_t deja = kFALSE ; | |
fa7cce36 | 193 | AliPHOSGeometry * geom = GetGeometry() ; |
bea63bea | 194 | |
b37750a6 | 195 | newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits) ; |
bea63bea | 196 | |
7854a24a | 197 | for ( hitCounter = fNhits-1 ; hitCounter >= 0 && !deja ; hitCounter-- ) { |
29b077b5 | 198 | curHit = dynamic_cast<AliPHOSHit*>((*fHits)[hitCounter]) ; |
9688c1dd | 199 | if(curHit->GetPrimary() != primary) break ; |
200 | // We add hits with the same primary, while GEANT treats primaries succesively | |
ed4205d8 | 201 | if( *curHit == *newHit ) { |
f15a01eb | 202 | *curHit + *newHit ; |
ed4205d8 | 203 | deja = kTRUE ; |
5f20d3fb | 204 | } |
205 | } | |
206 | ||
207 | if ( !deja ) { | |
ed4205d8 | 208 | new((*fHits)[fNhits]) AliPHOSHit(*newHit) ; |
7b326aac | 209 | // get the block Id number |
9688c1dd | 210 | Int_t relid[4] ; |
fa7cce36 | 211 | geom->AbsToRelNumbering(Id, relid) ; |
7b326aac | 212 | // and fill the relevant QA checkable (only if in PbW04) |
213 | if ( relid[1] == 0 ) { | |
214 | fQAHitsMul->Update(1) ; | |
29b077b5 | 215 | (static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[relid[0]-1]))->Update(1) ; |
7b326aac | 216 | } |
ed4205d8 | 217 | fNhits++ ; |
5f20d3fb | 218 | } |
219 | ||
bea63bea | 220 | delete newHit; |
bea63bea | 221 | } |
222 | ||
7b326aac | 223 | //____________________________________________________________________________ |
224 | void AliPHOSv1::FinishPrimary() | |
225 | { | |
226 | // called at the end of each track (primary) by AliRun | |
227 | // hits are reset for each new track | |
228 | // accumulate the total hit-multiplicity | |
229 | // if ( fQAHitsMul ) | |
230 | // fQAHitsMul->Update( fHits->GetEntriesFast() ) ; | |
231 | ||
232 | } | |
233 | ||
234 | //____________________________________________________________________________ | |
235 | void AliPHOSv1::FinishEvent() | |
236 | { | |
237 | // called at the end of each event by AliRun | |
238 | // accumulate the hit-multiplicity and total energy per block | |
239 | // if the values have been updated check it | |
240 | ||
241 | if ( fQATotEner ) { | |
242 | if ( fQATotEner->HasChanged() ) { | |
243 | fQATotEner->CheckMe() ; | |
244 | fQATotEner->Reset() ; | |
245 | } | |
246 | } | |
247 | ||
248 | Int_t i ; | |
249 | if ( fQAHitsMulB && fQATotEnerB ) { | |
fa7cce36 | 250 | for (i = 0 ; i < GetGeometry()->GetNModules() ; i++) { |
29b077b5 | 251 | AliPHOSQAIntCheckable * ci = static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[i]) ; |
252 | AliPHOSQAFloatCheckable* cf = static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[i]) ; | |
7b326aac | 253 | if ( ci->HasChanged() ) { |
254 | ci->CheckMe() ; | |
255 | ci->Reset() ; | |
256 | } | |
257 | if ( cf->HasChanged() ) { | |
258 | cf->CheckMe() ; | |
259 | cf->Reset() ; | |
260 | } | |
261 | } | |
262 | } | |
263 | ||
264 | // check the total multiplicity | |
265 | ||
266 | if ( fQAHitsMul ) { | |
267 | if ( fQAHitsMul->HasChanged() ) { | |
268 | fQAHitsMul->CheckMe() ; | |
269 | fQAHitsMul->Reset() ; | |
270 | } | |
271 | } | |
272 | } | |
5f20d3fb | 273 | //____________________________________________________________________________ |
7587f5a5 | 274 | void AliPHOSv1::StepManager(void) |
275 | { | |
9688c1dd | 276 | // Accumulates hits as long as the track stays in a single crystal or CPV gas Cell |
b2a60966 | 277 | |
4f5bbbd4 | 278 | Int_t relid[4] ; // (box, layer, row, column) indices |
279 | Int_t absid ; // absolute cell ID number | |
471193a8 | 280 | Float_t xyzte[5]={-1000.,-1000.,-1000.,0.,0.} ; // position wrt MRS, time and energy deposited |
4f5bbbd4 | 281 | TLorentzVector pos ; // Lorentz vector of the track current position |
fa412d9b | 282 | Int_t copy ; |
7587f5a5 | 283 | |
bea63bea | 284 | Int_t tracknumber = gAlice->CurrentTrack() ; |
fa412d9b | 285 | Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() ); |
fa7cce36 | 286 | TString name = GetGeometry()->GetName() ; |
037cc66d | 287 | |
9688c1dd | 288 | Int_t moduleNumber ; |
289 | ||
290 | if( gMC->CurrentVolID(copy) == gMC->VolId("PCPQ") && | |
291 | (gMC->IsTrackEntering() ) && | |
292 | gMC->TrackCharge() != 0) { | |
f6d1e5e1 | 293 | |
9688c1dd | 294 | gMC -> TrackPosition(pos); |
f6d1e5e1 | 295 | |
9688c1dd | 296 | Float_t xyzm[3], xyzd[3] ; |
297 | Int_t i; | |
298 | for (i=0; i<3; i++) xyzm[i] = pos[i]; | |
299 | gMC -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system | |
300 | ||
e3daf02c | 301 | Float_t xyd[3]={0,0,0} ; //local position of the entering |
9688c1dd | 302 | xyd[0] = xyzd[0]; |
53e03a1e | 303 | xyd[1] =-xyzd[2]; |
304 | xyd[2] =-xyzd[1]; | |
f6d1e5e1 | 305 | |
9688c1dd | 306 | // Current momentum of the hit's track in the local ref. system |
307 | TLorentzVector pmom ; //momentum of the particle initiated hit | |
308 | gMC -> TrackMomentum(pmom); | |
309 | Float_t pm[3], pd[3]; | |
310 | for (i=0; i<3; i++) | |
311 | pm[i] = pmom[i]; | |
f6d1e5e1 | 312 | |
9688c1dd | 313 | gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system |
314 | pmom[0] = pd[0]; | |
cf75bc19 | 315 | pmom[1] =-pd[1]; |
316 | pmom[2] =-pd[2]; | |
f6d1e5e1 | 317 | |
9688c1dd | 318 | // Digitize the current CPV hit: |
319 | ||
320 | // 1. find pad response and | |
321 | gMC->CurrentVolOffID(3,moduleNumber); | |
322 | moduleNumber--; | |
323 | ||
324 | TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit | |
325 | CPVDigitize(pmom,xyd,moduleNumber,cpvDigits); | |
fa412d9b | 326 | |
9688c1dd | 327 | Float_t xmean = 0; |
328 | Float_t zmean = 0; | |
329 | Float_t qsum = 0; | |
330 | Int_t idigit,ndigits; | |
331 | ||
332 | // 2. go through the current digit list and sum digits in pads | |
333 | ||
334 | ndigits = cpvDigits->GetEntriesFast(); | |
335 | for (idigit=0; idigit<ndigits-1; idigit++) { | |
29b077b5 | 336 | AliPHOSCPVDigit *cpvDigit1 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit)); |
9688c1dd | 337 | Float_t x1 = cpvDigit1->GetXpad() ; |
338 | Float_t z1 = cpvDigit1->GetYpad() ; | |
339 | for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) { | |
29b077b5 | 340 | AliPHOSCPVDigit *cpvDigit2 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(jdigit)); |
9688c1dd | 341 | Float_t x2 = cpvDigit2->GetXpad() ; |
342 | Float_t z2 = cpvDigit2->GetYpad() ; | |
343 | if (x1==x2 && z1==z2) { | |
344 | Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ; | |
345 | cpvDigit2->SetQpad(qsum) ; | |
346 | cpvDigits->RemoveAt(idigit) ; | |
fa412d9b | 347 | } |
348 | } | |
9688c1dd | 349 | } |
350 | cpvDigits->Compress() ; | |
351 | ||
352 | // 3. add digits to temporary hit list fTmpHits | |
353 | ||
354 | ndigits = cpvDigits->GetEntriesFast(); | |
355 | for (idigit=0; idigit<ndigits; idigit++) { | |
29b077b5 | 356 | AliPHOSCPVDigit *cpvDigit = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit)); |
9688c1dd | 357 | relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number |
358 | relid[1] =-1 ; // means CPV | |
359 | relid[2] = cpvDigit->GetXpad() ; // column number of a pad | |
360 | relid[3] = cpvDigit->GetYpad() ; // row number of a pad | |
361 | ||
362 | // get the absolute Id number | |
363 | GetGeometry()->RelToAbsNumbering(relid, absid) ; | |
364 | ||
365 | // add current digit to the temporary hit list | |
366 | ||
471193a8 | 367 | xyzte[3] = gMC->TrackTime() ; |
368 | xyzte[4] = cpvDigit->GetQpad() ; // amplitude in a pad | |
9688c1dd | 369 | primary = -1; // No need in primary for CPV |
471193a8 | 370 | AddHit(fIshunt, primary, tracknumber, absid, xyzte); |
9688c1dd | 371 | |
372 | if (cpvDigit->GetQpad() > 0.02) { | |
373 | xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5); | |
374 | zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5); | |
375 | qsum += cpvDigit->GetQpad(); | |
fa412d9b | 376 | } |
fa412d9b | 377 | } |
e534a69d | 378 | if (cpvDigits) { |
379 | cpvDigits->Delete(); | |
380 | delete cpvDigits; | |
381 | cpvDigits=0; | |
382 | } | |
9688c1dd | 383 | } |
037cc66d | 384 | |
9688c1dd | 385 | |
386 | ||
fa412d9b | 387 | if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) { // We are inside a PBWO crystal |
9688c1dd | 388 | |
fa412d9b | 389 | gMC->TrackPosition(pos) ; |
471193a8 | 390 | xyzte[0] = pos[0] ; |
391 | xyzte[1] = pos[1] ; | |
392 | xyzte[2] = pos[2] ; | |
597e6309 | 393 | |
9688c1dd | 394 | Float_t global[3], local[3] ; |
395 | global[0] = pos[0] ; | |
396 | global[1] = pos[1] ; | |
397 | global[2] = pos[2] ; | |
398 | Float_t lostenergy = gMC->Edep(); | |
f6d1e5e1 | 399 | |
400 | //Put in the TreeK particle entering PHOS and all its parents | |
401 | if ( gMC->IsTrackEntering() ){ | |
402 | Float_t xyzd[3] ; | |
471193a8 | 403 | gMC -> Gmtod (xyzte, xyzd, 1); // transform coordinate from master to daughter system |
f6d1e5e1 | 404 | if (xyzd[1] > GetGeometry()->GetCrystalSize(1)/2-0.002 || |
405 | xyzd[1] < -GetGeometry()->GetCrystalSize(1)/2+0.002) { | |
406 | TParticle * part = 0 ; | |
407 | Int_t parent = gAlice->CurrentTrack() ; | |
408 | while ( parent != -1 ) { | |
409 | part = gAlice->Particle(parent) ; | |
410 | part->SetBit(kKeepBit); | |
411 | parent = part->GetFirstMother() ; | |
412 | } | |
413 | } | |
414 | } | |
9688c1dd | 415 | if ( lostenergy != 0 ) { // Track is inside the crystal and deposits some energy |
471193a8 | 416 | xyzte[3] = gMC->TrackTime() ; |
f6d1e5e1 | 417 | |
9688c1dd | 418 | gMC->CurrentVolOffID(10, moduleNumber) ; // get the PHOS module number ; |
7b326aac | 419 | |
9688c1dd | 420 | Int_t strip ; |
421 | gMC->CurrentVolOffID(3, strip); | |
422 | Int_t cell ; | |
423 | gMC->CurrentVolOffID(2, cell); | |
f6d1e5e1 | 424 | |
9688c1dd | 425 | Int_t row = 1 + GetGeometry()->GetNZ() - strip % GetGeometry()->GetNZ() ; |
426 | Int_t col = (Int_t) TMath::Ceil((Double_t) strip/GetGeometry()->GetNZ()) -1 ; | |
f6d1e5e1 | 427 | |
9688c1dd | 428 | absid = (moduleNumber-1)*GetGeometry()->GetNCristalsInModule() + |
429 | row + (col*GetGeometry()->GetEMCAGeometry()->GetNCellsInStrip() + cell-1)*GetGeometry()->GetNZ() ; | |
f6d1e5e1 | 430 | |
9688c1dd | 431 | gMC->Gmtod(global, local, 1) ; |
432 | ||
471193a8 | 433 | //Calculates the light yield, the number of photons produced in the |
9688c1dd | 434 | //crystal |
27f33ee5 | 435 | Float_t lightYield = gRandom->Poisson(fLightFactor * lostenergy * |
9688c1dd | 436 | exp(-fLightYieldAttenuation * |
437 | (local[1]+GetGeometry()->GetCrystalSize(1)/2.0 )) | |
438 | ) ; | |
471193a8 | 439 | |
9688c1dd | 440 | //Calculates de energy deposited in the crystal |
471193a8 | 441 | xyzte[4] = fAPDFactor * lightYield ; |
9688c1dd | 442 | |
443 | // add current hit to the hit list | |
21cd0c07 | 444 | // Info("StepManager","%d %d", primary, tracknumber) ; |
471193a8 | 445 | AddHit(fIshunt, primary,tracknumber, absid, xyzte); |
9688c1dd | 446 | |
94de8339 | 447 | // fill the relevant QA Checkables |
471193a8 | 448 | fQATotEner->Update( xyzte[4] ) ; // total energy in PHOS |
449 | (static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[moduleNumber-1]))->Update( xyzte[4] ) ; // energy in this block | |
f6d1e5e1 | 450 | |
fa412d9b | 451 | } // there is deposited energy |
452 | } // we are inside a PHOS Xtal | |
f6d1e5e1 | 453 | |
fa412d9b | 454 | } |
455 | ||
456 | //____________________________________________________________________________ | |
457 | void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, Int_t moduleNumber, TClonesArray *cpvDigits) | |
458 | { | |
459 | // ------------------------------------------------------------------------ | |
460 | // Digitize one CPV hit: | |
461 | // On input take exact 4-momentum p and position zxhit of the hit, | |
462 | // find the pad response around this hit and | |
463 | // put the amplitudes in the pads into array digits | |
464 | // | |
465 | // Author: Yuri Kharlov (after Serguei Sadovsky) | |
466 | // 2 October 2000 | |
467 | // ------------------------------------------------------------------------ | |
468 | ||
fa7cce36 | 469 | const Float_t kCelWr = GetGeometry()->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad) |
a3dfe79c | 470 | const Float_t kDetR = 0.1; // Relative energy fluctuation in track for 100 e- |
471 | const Float_t kdEdx = 4.0; // Average energy loss in CPV; | |
472 | const Int_t kNgamz = 5; // Ionization size in Z | |
473 | const Int_t kNgamx = 9; // Ionization size in Phi | |
474 | const Float_t kNoise = 0.03; // charge noise in one pad | |
fa412d9b | 475 | |
476 | Float_t rnor1,rnor2; | |
477 | ||
478 | // Just a reminder on axes notation in the CPV module: | |
479 | // axis Z goes along the beam | |
480 | // axis X goes across the beam in the module plane | |
481 | // axis Y is a normal to the module plane showing from the IP | |
482 | ||
483 | Float_t hitX = zxhit[0]; | |
484 | Float_t hitZ =-zxhit[1]; | |
485 | Float_t pX = p.Px(); | |
486 | Float_t pZ =-p.Pz(); | |
487 | Float_t pNorm = p.Py(); | |
a3dfe79c | 488 | Float_t eloss = kdEdx; |
3d402178 | 489 | |
21cd0c07 | 490 | //Info("CPVDigitize", "YVK : %f %f | %f %f %d", hitX, hitZ, pX, pZ, pNorm) ; |
7b326aac | 491 | |
fa7cce36 | 492 | Float_t dZY = pZ/pNorm * GetGeometry()->GetCPVGasThickness(); |
493 | Float_t dXY = pX/pNorm * GetGeometry()->GetCPVGasThickness(); | |
fa412d9b | 494 | gRandom->Rannor(rnor1,rnor2); |
a3dfe79c | 495 | eloss *= (1 + kDetR*rnor1) * |
fa7cce36 | 496 | TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(GetGeometry()->GetCPVGasThickness(),2))); |
497 | Float_t zhit1 = hitZ + GetGeometry()->GetCPVActiveSize(1)/2 - dZY/2; | |
498 | Float_t xhit1 = hitX + GetGeometry()->GetCPVActiveSize(0)/2 - dXY/2; | |
fa412d9b | 499 | Float_t zhit2 = zhit1 + dZY; |
500 | Float_t xhit2 = xhit1 + dXY; | |
501 | ||
a3dfe79c | 502 | Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in" |
503 | Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out" | |
fa412d9b | 504 | |
505 | Int_t nIter; | |
506 | Float_t zxe[3][5]; | |
507 | if (iwht1==iwht2) { // incline 1-wire hit | |
508 | nIter = 2; | |
509 | zxe[0][0] = (zhit1 + zhit2 - dZY*0.57735) / 2; | |
a3dfe79c | 510 | zxe[1][0] = (iwht1 + 0.5) * kCelWr; |
511 | zxe[2][0] = eloss/2; | |
fa412d9b | 512 | zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2; |
a3dfe79c | 513 | zxe[1][1] = (iwht1 + 0.5) * kCelWr; |
514 | zxe[2][1] = eloss/2; | |
fa412d9b | 515 | } |
516 | else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit | |
517 | nIter = 3; | |
518 | Int_t iwht3 = (iwht1 + iwht2) / 2; | |
a3dfe79c | 519 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; // wire 1 |
520 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; // wire 2 | |
521 | Float_t xwht3 = (iwht3 + 0.5) * kCelWr; // wire 3 | |
fa412d9b | 522 | Float_t xwr13 = (xwht1 + xwht3) / 2; // center 13 |
523 | Float_t xwr23 = (xwht2 + xwht3) / 2; // center 23 | |
524 | Float_t dxw1 = xhit1 - xwr13; | |
525 | Float_t dxw2 = xhit2 - xwr23; | |
a3dfe79c | 526 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); |
527 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); | |
528 | Float_t egm3 = kCelWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); | |
fa412d9b | 529 | zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2; |
530 | zxe[1][0] = xwht1; | |
a3dfe79c | 531 | zxe[2][0] = eloss * egm1; |
fa412d9b | 532 | zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2; |
533 | zxe[1][1] = xwht2; | |
a3dfe79c | 534 | zxe[2][1] = eloss * egm2; |
fa412d9b | 535 | zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1; |
536 | zxe[1][2] = xwht3; | |
a3dfe79c | 537 | zxe[2][2] = eloss * egm3; |
fa412d9b | 538 | } |
539 | else { // incline 2-wire hit | |
540 | nIter = 2; | |
a3dfe79c | 541 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; |
542 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; | |
fa412d9b | 543 | Float_t xwr12 = (xwht1 + xwht2) / 2; |
544 | Float_t dxw1 = xhit1 - xwr12; | |
545 | Float_t dxw2 = xhit2 - xwr12; | |
546 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); | |
547 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); | |
548 | zxe[0][0] = (zhit1 + zhit2 - dZY*egm1) / 2; | |
549 | zxe[1][0] = xwht1; | |
a3dfe79c | 550 | zxe[2][0] = eloss * egm1; |
fa412d9b | 551 | zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2; |
552 | zxe[1][1] = xwht2; | |
a3dfe79c | 553 | zxe[2][1] = eloss * egm2; |
fa412d9b | 554 | } |
bea63bea | 555 | |
fa412d9b | 556 | // Finite size of ionization region |
557 | ||
fa7cce36 | 558 | Int_t nCellZ = GetGeometry()->GetNumberOfCPVPadsZ(); |
559 | Int_t nCellX = GetGeometry()->GetNumberOfCPVPadsPhi(); | |
a3dfe79c | 560 | Int_t nz3 = (kNgamz+1)/2; |
561 | Int_t nx3 = (kNgamx+1)/2; | |
562 | cpvDigits->Expand(nIter*kNgamx*kNgamz); | |
29b077b5 | 563 | TClonesArray &ldigits = *(static_cast<TClonesArray *>(cpvDigits)); |
fa412d9b | 564 | |
565 | for (Int_t iter=0; iter<nIter; iter++) { | |
566 | ||
567 | Float_t zhit = zxe[0][iter]; | |
568 | Float_t xhit = zxe[1][iter]; | |
569 | Float_t qhit = zxe[2][iter]; | |
fa7cce36 | 570 | Float_t zcell = zhit / GetGeometry()->GetPadSizeZ(); |
571 | Float_t xcell = xhit / GetGeometry()->GetPadSizePhi(); | |
fa412d9b | 572 | if ( zcell<=0 || xcell<=0 || |
573 | zcell>=nCellZ || xcell>=nCellX) return; | |
574 | Int_t izcell = (Int_t) zcell; | |
575 | Int_t ixcell = (Int_t) xcell; | |
576 | Float_t zc = zcell - izcell - 0.5; | |
577 | Float_t xc = xcell - ixcell - 0.5; | |
a3dfe79c | 578 | for (Int_t iz=1; iz<=kNgamz; iz++) { |
fa412d9b | 579 | Int_t kzg = izcell + iz - nz3; |
580 | if (kzg<=0 || kzg>nCellZ) continue; | |
581 | Float_t zg = (Float_t)(iz-nz3) - zc; | |
a3dfe79c | 582 | for (Int_t ix=1; ix<=kNgamx; ix++) { |
fa412d9b | 583 | Int_t kxg = ixcell + ix - nx3; |
584 | if (kxg<=0 || kxg>nCellX) continue; | |
585 | Float_t xg = (Float_t)(ix-nx3) - xc; | |
586 | ||
587 | // Now calculate pad response | |
588 | Float_t qpad = CPVPadResponseFunction(qhit,zg,xg); | |
a3dfe79c | 589 | qpad += kNoise*rnor2; |
fa412d9b | 590 | if (qpad<0) continue; |
591 | ||
592 | // Fill the array with pad response ID and amplitude | |
3d402178 | 593 | new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad); |
fa412d9b | 594 | } |
fa412d9b | 595 | } |
fa412d9b | 596 | } |
597 | } | |
598 | ||
599 | //____________________________________________________________________________ | |
600 | Float_t AliPHOSv1::CPVPadResponseFunction(Float_t qhit, Float_t zhit, Float_t xhit) { | |
601 | // ------------------------------------------------------------------------ | |
602 | // Calculate the amplitude in one CPV pad using the | |
603 | // cumulative pad response function | |
604 | // Author: Yuri Kharlov (after Serguei Sadovski) | |
605 | // 3 October 2000 | |
606 | // ------------------------------------------------------------------------ | |
607 | ||
fa7cce36 | 608 | Double_t dz = GetGeometry()->GetPadSizeZ() / 2; |
609 | Double_t dx = GetGeometry()->GetPadSizePhi() / 2; | |
610 | Double_t z = zhit * GetGeometry()->GetPadSizeZ(); | |
611 | Double_t x = xhit * GetGeometry()->GetPadSizePhi(); | |
fa412d9b | 612 | Double_t amplitude = qhit * |
613 | (CPVCumulPadResponse(z+dz,x+dx) - CPVCumulPadResponse(z+dz,x-dx) - | |
614 | CPVCumulPadResponse(z-dz,x+dx) + CPVCumulPadResponse(z-dz,x-dx)); | |
615 | return (Float_t)amplitude; | |
7587f5a5 | 616 | } |
617 | ||
fa412d9b | 618 | //____________________________________________________________________________ |
619 | Double_t AliPHOSv1::CPVCumulPadResponse(Double_t x, Double_t y) { | |
620 | // ------------------------------------------------------------------------ | |
621 | // Cumulative pad response function | |
622 | // It includes several terms from the CF decomposition in electrostatics | |
623 | // Note: this cumulative function is wrong since omits some terms | |
624 | // but the cell amplitude obtained with it is correct because | |
625 | // these omitting terms cancel | |
626 | // Author: Yuri Kharlov (after Serguei Sadovski) | |
627 | // 3 October 2000 | |
628 | // ------------------------------------------------------------------------ | |
629 | ||
a3dfe79c | 630 | const Double_t kA=1.0; |
631 | const Double_t kB=0.7; | |
fa412d9b | 632 | |
633 | Double_t r2 = x*x + y*y; | |
634 | Double_t xy = x*y; | |
635 | Double_t cumulPRF = 0; | |
636 | for (Int_t i=0; i<=4; i++) { | |
a3dfe79c | 637 | Double_t b1 = (2*i + 1) * kB; |
fa412d9b | 638 | cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) ); |
639 | } | |
a3dfe79c | 640 | cumulPRF *= kA/(2*TMath::Pi()); |
fa412d9b | 641 | return cumulPRF; |
642 | } | |
7eb9d12d | 643 |