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