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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 | //--- |
a3dfe79c | 21 | //--- |
22 | // Layout EMC + CPV has name IHEP: | |
ed4205d8 | 23 | // Produces hits for CPV, cumulated hits |
24 | //--- | |
ed4205d8 | 25 | //--- |
5f20d3fb | 26 | //*-- Author: Yves Schutz (SUBATECH) |
b2a60966 | 27 | |
7587f5a5 | 28 | |
29 | // --- ROOT system --- | |
88cb7938 | 30 | |
31 | #include <TBRIK.h> | |
32 | #include <TNode.h> | |
33 | #include <TParticle.h> | |
34 | #include <TRandom.h> | |
35 | #include <TTree.h> | |
36 | #include <TVirtualMC.h> | |
7587f5a5 | 37 | |
38 | // --- Standard library --- | |
39 | ||
88cb7938 | 40 | #include <string.h> |
41 | #include <stdlib.h> | |
42 | ||
7587f5a5 | 43 | // --- AliRoot header files --- |
44 | ||
88cb7938 | 45 | #include "AliConst.h" |
97cee223 | 46 | #include "AliPHOSCPVDigit.h" |
97cee223 | 47 | #include "AliPHOSGeometry.h" |
88cb7938 | 48 | #include "AliPHOSHit.h" |
7b326aac | 49 | #include "AliPHOSQAFloatCheckable.h" |
88cb7938 | 50 | #include "AliPHOSQAIntCheckable.h" |
7b326aac | 51 | #include "AliPHOSQAMeanChecker.h" |
88cb7938 | 52 | #include "AliPHOSv1.h" |
53 | #include "AliRun.h" | |
7587f5a5 | 54 | |
55 | ClassImp(AliPHOSv1) | |
56 | ||
bea63bea | 57 | //____________________________________________________________________________ |
02ab1add | 58 | AliPHOSv1::AliPHOSv1(): |
59 | AliPHOSv0() | |
bea63bea | 60 | { |
735e58f1 | 61 | // default ctor: initialze data memebers |
62 | fQAHitsMul = 0 ; | |
63 | fQAHitsMulB = 0 ; | |
64 | fQATotEner = 0 ; | |
65 | fQATotEnerB = 0 ; | |
9688c1dd | 66 | |
67 | fLightYieldMean = 0. ; | |
68 | fIntrinsicPINEfficiency = 0. ; | |
69 | fLightYieldAttenuation = 0. ; | |
70 | fRecalibrationFactor = 0. ; | |
71 | fElectronsPerGeV = 0. ; | |
27f33ee5 | 72 | fAPDGain = 0. ; |
73 | fLightFactor = 0. ; | |
74 | fAPDFactor = 0. ; | |
9688c1dd | 75 | |
bea63bea | 76 | } |
77 | ||
7587f5a5 | 78 | //____________________________________________________________________________ |
79 | AliPHOSv1::AliPHOSv1(const char *name, const char *title): | |
7b326aac | 80 | AliPHOSv0(name,title) |
7587f5a5 | 81 | { |
5f20d3fb | 82 | // |
ed4205d8 | 83 | // We store hits : |
5f20d3fb | 84 | // - fHits (the "normal" one), which retains the hits associated with |
85 | // the current primary particle being tracked | |
86 | // (this array is reset after each primary has been tracked). | |
87 | // | |
fa412d9b | 88 | |
037cc66d | 89 | |
5f20d3fb | 90 | |
91 | // We do not want to save in TreeH the raw hits | |
92 | // But save the cumulated hits instead (need to create the branch myself) | |
93 | // It is put in the Digit Tree because the TreeH is filled after each primary | |
7b326aac | 94 | // and the TreeD at the end of the event (branch is set in FinishEvent() ). |
5f20d3fb | 95 | |
ed4205d8 | 96 | fHits= new TClonesArray("AliPHOSHit",1000) ; |
f6d1e5e1 | 97 | gAlice->AddHitList(fHits) ; |
5f20d3fb | 98 | |
ed4205d8 | 99 | fNhits = 0 ; |
5f20d3fb | 100 | |
f6d1e5e1 | 101 | fIshunt = 2 ; // All hits are associated with primary particles |
7b326aac | 102 | |
9688c1dd | 103 | //Photoelectron statistics: |
104 | // The light yield is a poissonian distribution of the number of | |
105 | // photons created in the PbWo4 crystal, calculated using following formula | |
106 | // NumberOfPhotons = EnergyLost * LightYieldMean* APDEfficiency * | |
107 | // exp (-LightYieldAttenuation * DistanceToPINdiodeFromTheHit); | |
108 | // LightYieldMean is parameter calculated to be over 47000 photons per GeV | |
109 | // APDEfficiency is 0.02655 | |
110 | // k_0 is 0.0045 from Valery Antonenko | |
111 | // The number of electrons created in the APD is | |
112 | // NumberOfElectrons = APDGain * LightYield | |
113 | // The APD Gain is 300 | |
114 | fLightYieldMean = 47000; | |
115 | fIntrinsicPINEfficiency = 0.02655 ; //APD= 0.1875/0.1271 * 0.018 (PIN) | |
27f33ee5 | 116 | fLightYieldAttenuation = 0.0045 ; |
117 | fRecalibrationFactor = 13.418/ fLightYieldMean ; | |
118 | fElectronsPerGeV = 2.77e+8 ; | |
119 | fAPDGain = 300. ; | |
120 | fLightFactor = fLightYieldMean * fIntrinsicPINEfficiency ; | |
121 | fAPDFactor = (fRecalibrationFactor/100.) * fAPDGain ; | |
122 | ||
9688c1dd | 123 | |
fa7cce36 | 124 | Int_t nb = GetGeometry()->GetNModules() ; |
fa412d9b | 125 | |
7b326aac | 126 | // create checkables |
127 | fQAHitsMul = new AliPHOSQAIntCheckable("HitsM") ; | |
128 | fQATotEner = new AliPHOSQAFloatCheckable("TotEn") ; | |
9bc230c0 | 129 | fQAHitsMulB = new TClonesArray("AliPHOSQAIntCheckable",nb) ; |
130 | fQAHitsMulB->SetOwner() ; | |
7b326aac | 131 | fQATotEnerB = new TClonesArray("AliPHOSQAFloatCheckable", nb); |
9bc230c0 | 132 | fQATotEnerB->SetOwner() ; |
7b326aac | 133 | char tempo[20] ; |
134 | Int_t i ; | |
135 | for ( i = 0 ; i < nb ; i++ ) { | |
136 | sprintf(tempo, "HitsMB%d", i+1) ; | |
137 | new( (*fQAHitsMulB)[i]) AliPHOSQAIntCheckable(tempo) ; | |
138 | sprintf(tempo, "TotEnB%d", i+1) ; | |
139 | new( (*fQATotEnerB)[i] ) AliPHOSQAFloatCheckable(tempo) ; | |
140 | } | |
141 | ||
7b326aac | 142 | AliPHOSQAMeanChecker * hmc = new AliPHOSQAMeanChecker("HitsMul", 100. ,25.) ; |
143 | AliPHOSQAMeanChecker * emc = new AliPHOSQAMeanChecker("TotEner", 10. ,5.) ; | |
144 | AliPHOSQAMeanChecker * bhmc = new AliPHOSQAMeanChecker("HitsMulB", 100. ,5.) ; | |
145 | AliPHOSQAMeanChecker * bemc = new AliPHOSQAMeanChecker("TotEnerB", 2. ,.5) ; | |
146 | ||
147 | // associate checkables and checkers | |
148 | fQAHitsMul->AddChecker(hmc) ; | |
149 | fQATotEner->AddChecker(emc) ; | |
150 | for ( i = 0 ; i < nb ; i++ ) { | |
29b077b5 | 151 | (static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[i]))->AddChecker(bhmc) ; |
152 | (static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[i]))->AddChecker(bemc) ; | |
7b326aac | 153 | } |
7b7c1533 | 154 | |
5f20d3fb | 155 | } |
156 | ||
7587f5a5 | 157 | //____________________________________________________________________________ |
bea63bea | 158 | AliPHOSv1::~AliPHOSv1() |
b2a60966 | 159 | { |
bea63bea | 160 | // dtor |
88cb7938 | 161 | if ( fHits) { |
ed4205d8 | 162 | fHits->Delete() ; |
163 | delete fHits ; | |
164 | fHits = 0 ; | |
8dfa469d | 165 | } |
9bc230c0 | 166 | |
9bc230c0 | 167 | if ( fQAHitsMulB ) { |
168 | fQAHitsMulB->Delete() ; | |
169 | delete fQAHitsMulB ; | |
170 | } | |
171 | ||
172 | if ( fQATotEnerB ) { | |
173 | fQATotEnerB->Delete() ; | |
174 | delete fQATotEnerB ; | |
175 | } | |
176 | ||
7587f5a5 | 177 | } |
178 | ||
7587f5a5 | 179 | //____________________________________________________________________________ |
b37750a6 | 180 | void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits) |
bea63bea | 181 | { |
182 | // Add a hit to the hit list. | |
f6d1e5e1 | 183 | // A PHOS hit is the sum of all hits in a single crystal from one primary and within some time gate |
bea63bea | 184 | |
5f20d3fb | 185 | Int_t hitCounter ; |
bea63bea | 186 | AliPHOSHit *newHit ; |
5f20d3fb | 187 | AliPHOSHit *curHit ; |
188 | Bool_t deja = kFALSE ; | |
fa7cce36 | 189 | AliPHOSGeometry * geom = GetGeometry() ; |
bea63bea | 190 | |
b37750a6 | 191 | newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits) ; |
bea63bea | 192 | |
7854a24a | 193 | for ( hitCounter = fNhits-1 ; hitCounter >= 0 && !deja ; hitCounter-- ) { |
29b077b5 | 194 | curHit = dynamic_cast<AliPHOSHit*>((*fHits)[hitCounter]) ; |
9688c1dd | 195 | if(curHit->GetPrimary() != primary) break ; |
196 | // We add hits with the same primary, while GEANT treats primaries succesively | |
ed4205d8 | 197 | if( *curHit == *newHit ) { |
f15a01eb | 198 | *curHit + *newHit ; |
ed4205d8 | 199 | deja = kTRUE ; |
5f20d3fb | 200 | } |
201 | } | |
202 | ||
203 | if ( !deja ) { | |
ed4205d8 | 204 | new((*fHits)[fNhits]) AliPHOSHit(*newHit) ; |
7b326aac | 205 | // get the block Id number |
9688c1dd | 206 | Int_t relid[4] ; |
fa7cce36 | 207 | geom->AbsToRelNumbering(Id, relid) ; |
7b326aac | 208 | // and fill the relevant QA checkable (only if in PbW04) |
209 | if ( relid[1] == 0 ) { | |
210 | fQAHitsMul->Update(1) ; | |
29b077b5 | 211 | (static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[relid[0]-1]))->Update(1) ; |
7b326aac | 212 | } |
ed4205d8 | 213 | fNhits++ ; |
5f20d3fb | 214 | } |
215 | ||
bea63bea | 216 | delete newHit; |
bea63bea | 217 | } |
218 | ||
7b326aac | 219 | //____________________________________________________________________________ |
220 | void AliPHOSv1::FinishPrimary() | |
221 | { | |
222 | // called at the end of each track (primary) by AliRun | |
223 | // hits are reset for each new track | |
224 | // accumulate the total hit-multiplicity | |
225 | // if ( fQAHitsMul ) | |
226 | // fQAHitsMul->Update( fHits->GetEntriesFast() ) ; | |
227 | ||
228 | } | |
229 | ||
230 | //____________________________________________________________________________ | |
231 | void AliPHOSv1::FinishEvent() | |
232 | { | |
233 | // called at the end of each event by AliRun | |
234 | // accumulate the hit-multiplicity and total energy per block | |
235 | // if the values have been updated check it | |
88cb7938 | 236 | |
7b326aac | 237 | |
238 | if ( fQATotEner ) { | |
239 | if ( fQATotEner->HasChanged() ) { | |
240 | fQATotEner->CheckMe() ; | |
241 | fQATotEner->Reset() ; | |
242 | } | |
243 | } | |
244 | ||
245 | Int_t i ; | |
246 | if ( fQAHitsMulB && fQATotEnerB ) { | |
fa7cce36 | 247 | for (i = 0 ; i < GetGeometry()->GetNModules() ; i++) { |
29b077b5 | 248 | AliPHOSQAIntCheckable * ci = static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[i]) ; |
249 | AliPHOSQAFloatCheckable* cf = static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[i]) ; | |
7b326aac | 250 | if ( ci->HasChanged() ) { |
251 | ci->CheckMe() ; | |
252 | ci->Reset() ; | |
253 | } | |
254 | if ( cf->HasChanged() ) { | |
255 | cf->CheckMe() ; | |
256 | cf->Reset() ; | |
257 | } | |
258 | } | |
259 | } | |
260 | ||
261 | // check the total multiplicity | |
262 | ||
263 | if ( fQAHitsMul ) { | |
264 | if ( fQAHitsMul->HasChanged() ) { | |
265 | fQAHitsMul->CheckMe() ; | |
266 | fQAHitsMul->Reset() ; | |
267 | } | |
268 | } | |
88cb7938 | 269 | |
270 | AliDetector::FinishEvent(); | |
7b326aac | 271 | } |
5f20d3fb | 272 | //____________________________________________________________________________ |
7587f5a5 | 273 | void AliPHOSv1::StepManager(void) |
274 | { | |
9688c1dd | 275 | // Accumulates hits as long as the track stays in a single crystal or CPV gas Cell |
b2a60966 | 276 | |
4f5bbbd4 | 277 | Int_t relid[4] ; // (box, layer, row, column) indices |
278 | Int_t absid ; // absolute cell ID number | |
471193a8 | 279 | Float_t xyzte[5]={-1000.,-1000.,-1000.,0.,0.} ; // position wrt MRS, time and energy deposited |
4f5bbbd4 | 280 | TLorentzVector pos ; // Lorentz vector of the track current position |
fa412d9b | 281 | Int_t copy ; |
7587f5a5 | 282 | |
bcd8a61c | 283 | Int_t tracknumber = gAlice->GetCurrentTrackNumber() ; |
fa7cce36 | 284 | TString name = GetGeometry()->GetName() ; |
037cc66d | 285 | |
9688c1dd | 286 | Int_t moduleNumber ; |
287 | ||
288 | if( gMC->CurrentVolID(copy) == gMC->VolId("PCPQ") && | |
289 | (gMC->IsTrackEntering() ) && | |
290 | gMC->TrackCharge() != 0) { | |
f6d1e5e1 | 291 | |
9688c1dd | 292 | gMC -> TrackPosition(pos); |
f6d1e5e1 | 293 | |
9688c1dd | 294 | Float_t xyzm[3], xyzd[3] ; |
295 | Int_t i; | |
296 | for (i=0; i<3; i++) xyzm[i] = pos[i]; | |
297 | gMC -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system | |
298 | ||
e3daf02c | 299 | Float_t xyd[3]={0,0,0} ; //local position of the entering |
9688c1dd | 300 | xyd[0] = xyzd[0]; |
53e03a1e | 301 | xyd[1] =-xyzd[2]; |
302 | xyd[2] =-xyzd[1]; | |
f6d1e5e1 | 303 | |
9688c1dd | 304 | // Current momentum of the hit's track in the local ref. system |
305 | TLorentzVector pmom ; //momentum of the particle initiated hit | |
306 | gMC -> TrackMomentum(pmom); | |
307 | Float_t pm[3], pd[3]; | |
308 | for (i=0; i<3; i++) | |
309 | pm[i] = pmom[i]; | |
f6d1e5e1 | 310 | |
9688c1dd | 311 | gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system |
312 | pmom[0] = pd[0]; | |
cf75bc19 | 313 | pmom[1] =-pd[1]; |
314 | pmom[2] =-pd[2]; | |
f6d1e5e1 | 315 | |
9688c1dd | 316 | // Digitize the current CPV hit: |
317 | ||
318 | // 1. find pad response and | |
319 | gMC->CurrentVolOffID(3,moduleNumber); | |
320 | moduleNumber--; | |
321 | ||
322 | TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit | |
90cceaf6 | 323 | CPVDigitize(pmom,xyd,cpvDigits); |
fa412d9b | 324 | |
9688c1dd | 325 | Float_t xmean = 0; |
326 | Float_t zmean = 0; | |
327 | Float_t qsum = 0; | |
328 | Int_t idigit,ndigits; | |
329 | ||
330 | // 2. go through the current digit list and sum digits in pads | |
331 | ||
332 | ndigits = cpvDigits->GetEntriesFast(); | |
333 | for (idigit=0; idigit<ndigits-1; idigit++) { | |
29b077b5 | 334 | AliPHOSCPVDigit *cpvDigit1 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit)); |
9688c1dd | 335 | Float_t x1 = cpvDigit1->GetXpad() ; |
336 | Float_t z1 = cpvDigit1->GetYpad() ; | |
337 | for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) { | |
29b077b5 | 338 | AliPHOSCPVDigit *cpvDigit2 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(jdigit)); |
9688c1dd | 339 | Float_t x2 = cpvDigit2->GetXpad() ; |
340 | Float_t z2 = cpvDigit2->GetYpad() ; | |
341 | if (x1==x2 && z1==z2) { | |
342 | Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ; | |
343 | cpvDigit2->SetQpad(qsum) ; | |
344 | cpvDigits->RemoveAt(idigit) ; | |
fa412d9b | 345 | } |
346 | } | |
9688c1dd | 347 | } |
348 | cpvDigits->Compress() ; | |
349 | ||
350 | // 3. add digits to temporary hit list fTmpHits | |
351 | ||
352 | ndigits = cpvDigits->GetEntriesFast(); | |
353 | for (idigit=0; idigit<ndigits; idigit++) { | |
29b077b5 | 354 | AliPHOSCPVDigit *cpvDigit = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit)); |
9688c1dd | 355 | relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number |
356 | relid[1] =-1 ; // means CPV | |
357 | relid[2] = cpvDigit->GetXpad() ; // column number of a pad | |
358 | relid[3] = cpvDigit->GetYpad() ; // row number of a pad | |
359 | ||
360 | // get the absolute Id number | |
361 | GetGeometry()->RelToAbsNumbering(relid, absid) ; | |
362 | ||
363 | // add current digit to the temporary hit list | |
364 | ||
471193a8 | 365 | xyzte[3] = gMC->TrackTime() ; |
366 | xyzte[4] = cpvDigit->GetQpad() ; // amplitude in a pad | |
5a49626b | 367 | AddHit(fIshunt, -1, tracknumber, absid, xyzte); // -1: No need in primary for CPV |
9688c1dd | 368 | |
369 | if (cpvDigit->GetQpad() > 0.02) { | |
370 | xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5); | |
371 | zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5); | |
372 | qsum += cpvDigit->GetQpad(); | |
fa412d9b | 373 | } |
fa412d9b | 374 | } |
e534a69d | 375 | if (cpvDigits) { |
376 | cpvDigits->Delete(); | |
377 | delete cpvDigits; | |
378 | cpvDigits=0; | |
379 | } | |
9688c1dd | 380 | } |
037cc66d | 381 | |
9688c1dd | 382 | |
383 | ||
fa412d9b | 384 | if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) { // We are inside a PBWO crystal |
9688c1dd | 385 | |
fa412d9b | 386 | gMC->TrackPosition(pos) ; |
471193a8 | 387 | xyzte[0] = pos[0] ; |
388 | xyzte[1] = pos[1] ; | |
389 | xyzte[2] = pos[2] ; | |
597e6309 | 390 | |
9688c1dd | 391 | Float_t global[3], local[3] ; |
392 | global[0] = pos[0] ; | |
393 | global[1] = pos[1] ; | |
394 | global[2] = pos[2] ; | |
395 | Float_t lostenergy = gMC->Edep(); | |
f6d1e5e1 | 396 | |
397 | //Put in the TreeK particle entering PHOS and all its parents | |
398 | if ( gMC->IsTrackEntering() ){ | |
399 | Float_t xyzd[3] ; | |
471193a8 | 400 | gMC -> Gmtod (xyzte, xyzd, 1); // transform coordinate from master to daughter system |
5a49626b | 401 | if (xyzd[1] < -GetGeometry()->GetCrystalSize(1)/2.+0.001){ //Entered close to forward surface |
f6d1e5e1 | 402 | TParticle * part = 0 ; |
bcd8a61c | 403 | Int_t parent = gAlice->GetCurrentTrackNumber() ; |
f6d1e5e1 | 404 | while ( parent != -1 ) { |
405 | part = gAlice->Particle(parent) ; | |
406 | part->SetBit(kKeepBit); | |
407 | parent = part->GetFirstMother() ; | |
408 | } | |
409 | } | |
410 | } | |
9688c1dd | 411 | if ( lostenergy != 0 ) { // Track is inside the crystal and deposits some energy |
471193a8 | 412 | xyzte[3] = gMC->TrackTime() ; |
f6d1e5e1 | 413 | |
9688c1dd | 414 | gMC->CurrentVolOffID(10, moduleNumber) ; // get the PHOS module number ; |
7b326aac | 415 | |
9688c1dd | 416 | Int_t strip ; |
417 | gMC->CurrentVolOffID(3, strip); | |
418 | Int_t cell ; | |
419 | gMC->CurrentVolOffID(2, cell); | |
f6d1e5e1 | 420 | |
9688c1dd | 421 | Int_t row = 1 + GetGeometry()->GetNZ() - strip % GetGeometry()->GetNZ() ; |
422 | Int_t col = (Int_t) TMath::Ceil((Double_t) strip/GetGeometry()->GetNZ()) -1 ; | |
f6d1e5e1 | 423 | |
9688c1dd | 424 | absid = (moduleNumber-1)*GetGeometry()->GetNCristalsInModule() + |
425 | row + (col*GetGeometry()->GetEMCAGeometry()->GetNCellsInStrip() + cell-1)*GetGeometry()->GetNZ() ; | |
f6d1e5e1 | 426 | |
9688c1dd | 427 | gMC->Gmtod(global, local, 1) ; |
428 | ||
471193a8 | 429 | //Calculates the light yield, the number of photons produced in the |
9688c1dd | 430 | //crystal |
27f33ee5 | 431 | Float_t lightYield = gRandom->Poisson(fLightFactor * lostenergy * |
9688c1dd | 432 | exp(-fLightYieldAttenuation * |
433 | (local[1]+GetGeometry()->GetCrystalSize(1)/2.0 )) | |
434 | ) ; | |
471193a8 | 435 | |
9688c1dd | 436 | //Calculates de energy deposited in the crystal |
471193a8 | 437 | xyzte[4] = fAPDFactor * lightYield ; |
9688c1dd | 438 | |
5a49626b | 439 | Int_t primary =-1 ; |
440 | if(fIshunt == 1) | |
bcd8a61c | 441 | primary = gAlice->GetPrimary( gAlice->GetCurrentTrackNumber() ); |
5a49626b | 442 | else if(fIshunt == 2){ |
bcd8a61c | 443 | primary = gAlice->GetCurrentTrackNumber() ; |
5a49626b | 444 | TParticle * part = gAlice->Particle(primary) ; |
445 | while ( !part->TestBit(kKeepBit) ) { | |
446 | primary = part->GetFirstMother() ; | |
447 | if(primary == -1) break ; //there is a possibility that particle passed e.g. thermal isulator and hits a side | |
448 | //surface of the crystal. In this case it may have no primary at all. | |
449 | //We can not easily separate this case from the case when this is part of the shower, | |
450 | //developed in the neighboring crystal. | |
451 | part = gAlice->Particle(primary) ; | |
452 | } | |
453 | } | |
454 | ||
455 | ||
9688c1dd | 456 | // add current hit to the hit list |
21cd0c07 | 457 | // Info("StepManager","%d %d", primary, tracknumber) ; |
471193a8 | 458 | AddHit(fIshunt, primary,tracknumber, absid, xyzte); |
9688c1dd | 459 | |
94de8339 | 460 | // fill the relevant QA Checkables |
471193a8 | 461 | fQATotEner->Update( xyzte[4] ) ; // total energy in PHOS |
462 | (static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[moduleNumber-1]))->Update( xyzte[4] ) ; // energy in this block | |
f6d1e5e1 | 463 | |
fa412d9b | 464 | } // there is deposited energy |
465 | } // we are inside a PHOS Xtal | |
f6d1e5e1 | 466 | |
fa412d9b | 467 | } |
468 | ||
469 | //____________________________________________________________________________ | |
90cceaf6 | 470 | void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, TClonesArray *cpvDigits) |
fa412d9b | 471 | { |
472 | // ------------------------------------------------------------------------ | |
473 | // Digitize one CPV hit: | |
474 | // On input take exact 4-momentum p and position zxhit of the hit, | |
475 | // find the pad response around this hit and | |
476 | // put the amplitudes in the pads into array digits | |
477 | // | |
478 | // Author: Yuri Kharlov (after Serguei Sadovsky) | |
479 | // 2 October 2000 | |
480 | // ------------------------------------------------------------------------ | |
481 | ||
fa7cce36 | 482 | const Float_t kCelWr = GetGeometry()->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad) |
a3dfe79c | 483 | const Float_t kDetR = 0.1; // Relative energy fluctuation in track for 100 e- |
484 | const Float_t kdEdx = 4.0; // Average energy loss in CPV; | |
485 | const Int_t kNgamz = 5; // Ionization size in Z | |
486 | const Int_t kNgamx = 9; // Ionization size in Phi | |
487 | const Float_t kNoise = 0.03; // charge noise in one pad | |
fa412d9b | 488 | |
489 | Float_t rnor1,rnor2; | |
490 | ||
491 | // Just a reminder on axes notation in the CPV module: | |
492 | // axis Z goes along the beam | |
493 | // axis X goes across the beam in the module plane | |
494 | // axis Y is a normal to the module plane showing from the IP | |
495 | ||
496 | Float_t hitX = zxhit[0]; | |
497 | Float_t hitZ =-zxhit[1]; | |
498 | Float_t pX = p.Px(); | |
499 | Float_t pZ =-p.Pz(); | |
500 | Float_t pNorm = p.Py(); | |
a3dfe79c | 501 | Float_t eloss = kdEdx; |
3d402178 | 502 | |
21cd0c07 | 503 | //Info("CPVDigitize", "YVK : %f %f | %f %f %d", hitX, hitZ, pX, pZ, pNorm) ; |
7b326aac | 504 | |
fa7cce36 | 505 | Float_t dZY = pZ/pNorm * GetGeometry()->GetCPVGasThickness(); |
506 | Float_t dXY = pX/pNorm * GetGeometry()->GetCPVGasThickness(); | |
fa412d9b | 507 | gRandom->Rannor(rnor1,rnor2); |
a3dfe79c | 508 | eloss *= (1 + kDetR*rnor1) * |
fa7cce36 | 509 | TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(GetGeometry()->GetCPVGasThickness(),2))); |
510 | Float_t zhit1 = hitZ + GetGeometry()->GetCPVActiveSize(1)/2 - dZY/2; | |
511 | Float_t xhit1 = hitX + GetGeometry()->GetCPVActiveSize(0)/2 - dXY/2; | |
fa412d9b | 512 | Float_t zhit2 = zhit1 + dZY; |
513 | Float_t xhit2 = xhit1 + dXY; | |
514 | ||
a3dfe79c | 515 | Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in" |
516 | Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out" | |
fa412d9b | 517 | |
518 | Int_t nIter; | |
519 | Float_t zxe[3][5]; | |
520 | if (iwht1==iwht2) { // incline 1-wire hit | |
521 | nIter = 2; | |
522 | zxe[0][0] = (zhit1 + zhit2 - dZY*0.57735) / 2; | |
a3dfe79c | 523 | zxe[1][0] = (iwht1 + 0.5) * kCelWr; |
524 | zxe[2][0] = eloss/2; | |
fa412d9b | 525 | zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2; |
a3dfe79c | 526 | zxe[1][1] = (iwht1 + 0.5) * kCelWr; |
527 | zxe[2][1] = eloss/2; | |
fa412d9b | 528 | } |
529 | else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit | |
530 | nIter = 3; | |
531 | Int_t iwht3 = (iwht1 + iwht2) / 2; | |
a3dfe79c | 532 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; // wire 1 |
533 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; // wire 2 | |
534 | Float_t xwht3 = (iwht3 + 0.5) * kCelWr; // wire 3 | |
fa412d9b | 535 | Float_t xwr13 = (xwht1 + xwht3) / 2; // center 13 |
536 | Float_t xwr23 = (xwht2 + xwht3) / 2; // center 23 | |
537 | Float_t dxw1 = xhit1 - xwr13; | |
538 | Float_t dxw2 = xhit2 - xwr23; | |
a3dfe79c | 539 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); |
540 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); | |
541 | Float_t egm3 = kCelWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); | |
fa412d9b | 542 | zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2; |
543 | zxe[1][0] = xwht1; | |
a3dfe79c | 544 | zxe[2][0] = eloss * egm1; |
fa412d9b | 545 | zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2; |
546 | zxe[1][1] = xwht2; | |
a3dfe79c | 547 | zxe[2][1] = eloss * egm2; |
fa412d9b | 548 | zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1; |
549 | zxe[1][2] = xwht3; | |
a3dfe79c | 550 | zxe[2][2] = eloss * egm3; |
fa412d9b | 551 | } |
552 | else { // incline 2-wire hit | |
553 | nIter = 2; | |
a3dfe79c | 554 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; |
555 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; | |
fa412d9b | 556 | Float_t xwr12 = (xwht1 + xwht2) / 2; |
557 | Float_t dxw1 = xhit1 - xwr12; | |
558 | Float_t dxw2 = xhit2 - xwr12; | |
559 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); | |
560 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); | |
561 | zxe[0][0] = (zhit1 + zhit2 - dZY*egm1) / 2; | |
562 | zxe[1][0] = xwht1; | |
a3dfe79c | 563 | zxe[2][0] = eloss * egm1; |
fa412d9b | 564 | zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2; |
565 | zxe[1][1] = xwht2; | |
a3dfe79c | 566 | zxe[2][1] = eloss * egm2; |
fa412d9b | 567 | } |
bea63bea | 568 | |
fa412d9b | 569 | // Finite size of ionization region |
570 | ||
fa7cce36 | 571 | Int_t nCellZ = GetGeometry()->GetNumberOfCPVPadsZ(); |
572 | Int_t nCellX = GetGeometry()->GetNumberOfCPVPadsPhi(); | |
a3dfe79c | 573 | Int_t nz3 = (kNgamz+1)/2; |
574 | Int_t nx3 = (kNgamx+1)/2; | |
575 | cpvDigits->Expand(nIter*kNgamx*kNgamz); | |
29b077b5 | 576 | TClonesArray &ldigits = *(static_cast<TClonesArray *>(cpvDigits)); |
fa412d9b | 577 | |
578 | for (Int_t iter=0; iter<nIter; iter++) { | |
579 | ||
580 | Float_t zhit = zxe[0][iter]; | |
581 | Float_t xhit = zxe[1][iter]; | |
582 | Float_t qhit = zxe[2][iter]; | |
fa7cce36 | 583 | Float_t zcell = zhit / GetGeometry()->GetPadSizeZ(); |
584 | Float_t xcell = xhit / GetGeometry()->GetPadSizePhi(); | |
fa412d9b | 585 | if ( zcell<=0 || xcell<=0 || |
586 | zcell>=nCellZ || xcell>=nCellX) return; | |
587 | Int_t izcell = (Int_t) zcell; | |
588 | Int_t ixcell = (Int_t) xcell; | |
589 | Float_t zc = zcell - izcell - 0.5; | |
590 | Float_t xc = xcell - ixcell - 0.5; | |
a3dfe79c | 591 | for (Int_t iz=1; iz<=kNgamz; iz++) { |
fa412d9b | 592 | Int_t kzg = izcell + iz - nz3; |
593 | if (kzg<=0 || kzg>nCellZ) continue; | |
594 | Float_t zg = (Float_t)(iz-nz3) - zc; | |
a3dfe79c | 595 | for (Int_t ix=1; ix<=kNgamx; ix++) { |
fa412d9b | 596 | Int_t kxg = ixcell + ix - nx3; |
597 | if (kxg<=0 || kxg>nCellX) continue; | |
598 | Float_t xg = (Float_t)(ix-nx3) - xc; | |
599 | ||
600 | // Now calculate pad response | |
601 | Float_t qpad = CPVPadResponseFunction(qhit,zg,xg); | |
a3dfe79c | 602 | qpad += kNoise*rnor2; |
fa412d9b | 603 | if (qpad<0) continue; |
604 | ||
605 | // Fill the array with pad response ID and amplitude | |
3d402178 | 606 | new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad); |
fa412d9b | 607 | } |
fa412d9b | 608 | } |
fa412d9b | 609 | } |
610 | } | |
611 | ||
612 | //____________________________________________________________________________ | |
613 | Float_t AliPHOSv1::CPVPadResponseFunction(Float_t qhit, Float_t zhit, Float_t xhit) { | |
614 | // ------------------------------------------------------------------------ | |
615 | // Calculate the amplitude in one CPV pad using the | |
616 | // cumulative pad response function | |
617 | // Author: Yuri Kharlov (after Serguei Sadovski) | |
618 | // 3 October 2000 | |
619 | // ------------------------------------------------------------------------ | |
620 | ||
fa7cce36 | 621 | Double_t dz = GetGeometry()->GetPadSizeZ() / 2; |
622 | Double_t dx = GetGeometry()->GetPadSizePhi() / 2; | |
623 | Double_t z = zhit * GetGeometry()->GetPadSizeZ(); | |
624 | Double_t x = xhit * GetGeometry()->GetPadSizePhi(); | |
fa412d9b | 625 | Double_t amplitude = qhit * |
626 | (CPVCumulPadResponse(z+dz,x+dx) - CPVCumulPadResponse(z+dz,x-dx) - | |
627 | CPVCumulPadResponse(z-dz,x+dx) + CPVCumulPadResponse(z-dz,x-dx)); | |
628 | return (Float_t)amplitude; | |
7587f5a5 | 629 | } |
630 | ||
fa412d9b | 631 | //____________________________________________________________________________ |
632 | Double_t AliPHOSv1::CPVCumulPadResponse(Double_t x, Double_t y) { | |
633 | // ------------------------------------------------------------------------ | |
634 | // Cumulative pad response function | |
635 | // It includes several terms from the CF decomposition in electrostatics | |
636 | // Note: this cumulative function is wrong since omits some terms | |
637 | // but the cell amplitude obtained with it is correct because | |
638 | // these omitting terms cancel | |
639 | // Author: Yuri Kharlov (after Serguei Sadovski) | |
640 | // 3 October 2000 | |
641 | // ------------------------------------------------------------------------ | |
642 | ||
a3dfe79c | 643 | const Double_t kA=1.0; |
644 | const Double_t kB=0.7; | |
fa412d9b | 645 | |
646 | Double_t r2 = x*x + y*y; | |
647 | Double_t xy = x*y; | |
648 | Double_t cumulPRF = 0; | |
649 | for (Int_t i=0; i<=4; i++) { | |
a3dfe79c | 650 | Double_t b1 = (2*i + 1) * kB; |
fa412d9b | 651 | cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) ); |
652 | } | |
a3dfe79c | 653 | cumulPRF *= kA/(2*TMath::Pi()); |
fa412d9b | 654 | return cumulPRF; |
655 | } | |
7eb9d12d | 656 |