]>
Commit | Line | Data |
---|---|---|
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") ; | |
9bc230c0 | 134 | fQAHitsMulB = new TClonesArray("AliPHOSQAIntCheckable",nb) ; |
135 | fQAHitsMulB->SetOwner() ; | |
7b326aac | 136 | fQATotEnerB = new TClonesArray("AliPHOSQAFloatCheckable", nb); |
9bc230c0 | 137 | fQATotEnerB->SetOwner() ; |
7b326aac | 138 | char tempo[20] ; |
139 | Int_t i ; | |
140 | for ( i = 0 ; i < nb ; i++ ) { | |
141 | sprintf(tempo, "HitsMB%d", i+1) ; | |
142 | new( (*fQAHitsMulB)[i]) AliPHOSQAIntCheckable(tempo) ; | |
143 | sprintf(tempo, "TotEnB%d", i+1) ; | |
144 | new( (*fQATotEnerB)[i] ) AliPHOSQAFloatCheckable(tempo) ; | |
145 | } | |
146 | ||
7b326aac | 147 | AliPHOSQAMeanChecker * hmc = new AliPHOSQAMeanChecker("HitsMul", 100. ,25.) ; |
148 | AliPHOSQAMeanChecker * emc = new AliPHOSQAMeanChecker("TotEner", 10. ,5.) ; | |
149 | AliPHOSQAMeanChecker * bhmc = new AliPHOSQAMeanChecker("HitsMulB", 100. ,5.) ; | |
150 | AliPHOSQAMeanChecker * bemc = new AliPHOSQAMeanChecker("TotEnerB", 2. ,.5) ; | |
151 | ||
152 | // associate checkables and checkers | |
153 | fQAHitsMul->AddChecker(hmc) ; | |
154 | fQATotEner->AddChecker(emc) ; | |
155 | for ( i = 0 ; i < nb ; i++ ) { | |
29b077b5 | 156 | (static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[i]))->AddChecker(bhmc) ; |
157 | (static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[i]))->AddChecker(bemc) ; | |
7b326aac | 158 | } |
7b7c1533 | 159 | |
5f20d3fb | 160 | } |
161 | ||
7587f5a5 | 162 | //____________________________________________________________________________ |
bea63bea | 163 | AliPHOSv1::~AliPHOSv1() |
b2a60966 | 164 | { |
bea63bea | 165 | // dtor |
5f20d3fb | 166 | |
ed4205d8 | 167 | if ( fHits) { |
168 | fHits->Delete() ; | |
169 | delete fHits ; | |
170 | fHits = 0 ; | |
8dfa469d | 171 | } |
9bc230c0 | 172 | |
9bc230c0 | 173 | if ( fQAHitsMulB ) { |
174 | fQAHitsMulB->Delete() ; | |
175 | delete fQAHitsMulB ; | |
176 | } | |
177 | ||
178 | if ( fQATotEnerB ) { | |
179 | fQATotEnerB->Delete() ; | |
180 | delete fQATotEnerB ; | |
181 | } | |
182 | ||
7587f5a5 | 183 | } |
184 | ||
7587f5a5 | 185 | //____________________________________________________________________________ |
b37750a6 | 186 | void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits) |
bea63bea | 187 | { |
188 | // Add a hit to the hit list. | |
f6d1e5e1 | 189 | // A PHOS hit is the sum of all hits in a single crystal from one primary and within some time gate |
bea63bea | 190 | |
5f20d3fb | 191 | Int_t hitCounter ; |
bea63bea | 192 | AliPHOSHit *newHit ; |
5f20d3fb | 193 | AliPHOSHit *curHit ; |
194 | Bool_t deja = kFALSE ; | |
fa7cce36 | 195 | AliPHOSGeometry * geom = GetGeometry() ; |
bea63bea | 196 | |
b37750a6 | 197 | newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits) ; |
bea63bea | 198 | |
7854a24a | 199 | for ( hitCounter = fNhits-1 ; hitCounter >= 0 && !deja ; hitCounter-- ) { |
29b077b5 | 200 | curHit = dynamic_cast<AliPHOSHit*>((*fHits)[hitCounter]) ; |
9688c1dd | 201 | if(curHit->GetPrimary() != primary) break ; |
202 | // We add hits with the same primary, while GEANT treats primaries succesively | |
ed4205d8 | 203 | if( *curHit == *newHit ) { |
f15a01eb | 204 | *curHit + *newHit ; |
ed4205d8 | 205 | deja = kTRUE ; |
5f20d3fb | 206 | } |
207 | } | |
208 | ||
209 | if ( !deja ) { | |
ed4205d8 | 210 | new((*fHits)[fNhits]) AliPHOSHit(*newHit) ; |
7b326aac | 211 | // get the block Id number |
9688c1dd | 212 | Int_t relid[4] ; |
fa7cce36 | 213 | geom->AbsToRelNumbering(Id, relid) ; |
7b326aac | 214 | // and fill the relevant QA checkable (only if in PbW04) |
215 | if ( relid[1] == 0 ) { | |
216 | fQAHitsMul->Update(1) ; | |
29b077b5 | 217 | (static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[relid[0]-1]))->Update(1) ; |
7b326aac | 218 | } |
ed4205d8 | 219 | fNhits++ ; |
5f20d3fb | 220 | } |
221 | ||
bea63bea | 222 | delete newHit; |
bea63bea | 223 | } |
224 | ||
7b326aac | 225 | //____________________________________________________________________________ |
226 | void AliPHOSv1::FinishPrimary() | |
227 | { | |
228 | // called at the end of each track (primary) by AliRun | |
229 | // hits are reset for each new track | |
230 | // accumulate the total hit-multiplicity | |
231 | // if ( fQAHitsMul ) | |
232 | // fQAHitsMul->Update( fHits->GetEntriesFast() ) ; | |
233 | ||
234 | } | |
235 | ||
236 | //____________________________________________________________________________ | |
237 | void AliPHOSv1::FinishEvent() | |
238 | { | |
239 | // called at the end of each event by AliRun | |
240 | // accumulate the hit-multiplicity and total energy per block | |
241 | // if the values have been updated check it | |
242 | ||
243 | if ( fQATotEner ) { | |
244 | if ( fQATotEner->HasChanged() ) { | |
245 | fQATotEner->CheckMe() ; | |
246 | fQATotEner->Reset() ; | |
247 | } | |
248 | } | |
249 | ||
250 | Int_t i ; | |
251 | if ( fQAHitsMulB && fQATotEnerB ) { | |
fa7cce36 | 252 | for (i = 0 ; i < GetGeometry()->GetNModules() ; i++) { |
29b077b5 | 253 | AliPHOSQAIntCheckable * ci = static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[i]) ; |
254 | AliPHOSQAFloatCheckable* cf = static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[i]) ; | |
7b326aac | 255 | if ( ci->HasChanged() ) { |
256 | ci->CheckMe() ; | |
257 | ci->Reset() ; | |
258 | } | |
259 | if ( cf->HasChanged() ) { | |
260 | cf->CheckMe() ; | |
261 | cf->Reset() ; | |
262 | } | |
263 | } | |
264 | } | |
265 | ||
266 | // check the total multiplicity | |
267 | ||
268 | if ( fQAHitsMul ) { | |
269 | if ( fQAHitsMul->HasChanged() ) { | |
270 | fQAHitsMul->CheckMe() ; | |
271 | fQAHitsMul->Reset() ; | |
272 | } | |
273 | } | |
274 | } | |
5f20d3fb | 275 | //____________________________________________________________________________ |
7587f5a5 | 276 | void AliPHOSv1::StepManager(void) |
277 | { | |
9688c1dd | 278 | // Accumulates hits as long as the track stays in a single crystal or CPV gas Cell |
b2a60966 | 279 | |
4f5bbbd4 | 280 | Int_t relid[4] ; // (box, layer, row, column) indices |
281 | Int_t absid ; // absolute cell ID number | |
471193a8 | 282 | Float_t xyzte[5]={-1000.,-1000.,-1000.,0.,0.} ; // position wrt MRS, time and energy deposited |
4f5bbbd4 | 283 | TLorentzVector pos ; // Lorentz vector of the track current position |
fa412d9b | 284 | Int_t copy ; |
7587f5a5 | 285 | |
bea63bea | 286 | Int_t tracknumber = gAlice->CurrentTrack() ; |
fa412d9b | 287 | Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() ); |
fa7cce36 | 288 | TString name = GetGeometry()->GetName() ; |
037cc66d | 289 | |
9688c1dd | 290 | Int_t moduleNumber ; |
291 | ||
292 | if( gMC->CurrentVolID(copy) == gMC->VolId("PCPQ") && | |
293 | (gMC->IsTrackEntering() ) && | |
294 | gMC->TrackCharge() != 0) { | |
f6d1e5e1 | 295 | |
9688c1dd | 296 | gMC -> TrackPosition(pos); |
f6d1e5e1 | 297 | |
9688c1dd | 298 | Float_t xyzm[3], xyzd[3] ; |
299 | Int_t i; | |
300 | for (i=0; i<3; i++) xyzm[i] = pos[i]; | |
301 | gMC -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system | |
302 | ||
e3daf02c | 303 | Float_t xyd[3]={0,0,0} ; //local position of the entering |
9688c1dd | 304 | xyd[0] = xyzd[0]; |
53e03a1e | 305 | xyd[1] =-xyzd[2]; |
306 | xyd[2] =-xyzd[1]; | |
f6d1e5e1 | 307 | |
9688c1dd | 308 | // Current momentum of the hit's track in the local ref. system |
309 | TLorentzVector pmom ; //momentum of the particle initiated hit | |
310 | gMC -> TrackMomentum(pmom); | |
311 | Float_t pm[3], pd[3]; | |
312 | for (i=0; i<3; i++) | |
313 | pm[i] = pmom[i]; | |
f6d1e5e1 | 314 | |
9688c1dd | 315 | gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system |
316 | pmom[0] = pd[0]; | |
cf75bc19 | 317 | pmom[1] =-pd[1]; |
318 | pmom[2] =-pd[2]; | |
f6d1e5e1 | 319 | |
9688c1dd | 320 | // Digitize the current CPV hit: |
321 | ||
322 | // 1. find pad response and | |
323 | gMC->CurrentVolOffID(3,moduleNumber); | |
324 | moduleNumber--; | |
325 | ||
326 | TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit | |
327 | CPVDigitize(pmom,xyd,moduleNumber,cpvDigits); | |
fa412d9b | 328 | |
9688c1dd | 329 | Float_t xmean = 0; |
330 | Float_t zmean = 0; | |
331 | Float_t qsum = 0; | |
332 | Int_t idigit,ndigits; | |
333 | ||
334 | // 2. go through the current digit list and sum digits in pads | |
335 | ||
336 | ndigits = cpvDigits->GetEntriesFast(); | |
337 | for (idigit=0; idigit<ndigits-1; idigit++) { | |
29b077b5 | 338 | AliPHOSCPVDigit *cpvDigit1 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit)); |
9688c1dd | 339 | Float_t x1 = cpvDigit1->GetXpad() ; |
340 | Float_t z1 = cpvDigit1->GetYpad() ; | |
341 | for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) { | |
29b077b5 | 342 | AliPHOSCPVDigit *cpvDigit2 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(jdigit)); |
9688c1dd | 343 | Float_t x2 = cpvDigit2->GetXpad() ; |
344 | Float_t z2 = cpvDigit2->GetYpad() ; | |
345 | if (x1==x2 && z1==z2) { | |
346 | Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ; | |
347 | cpvDigit2->SetQpad(qsum) ; | |
348 | cpvDigits->RemoveAt(idigit) ; | |
fa412d9b | 349 | } |
350 | } | |
9688c1dd | 351 | } |
352 | cpvDigits->Compress() ; | |
353 | ||
354 | // 3. add digits to temporary hit list fTmpHits | |
355 | ||
356 | ndigits = cpvDigits->GetEntriesFast(); | |
357 | for (idigit=0; idigit<ndigits; idigit++) { | |
29b077b5 | 358 | AliPHOSCPVDigit *cpvDigit = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit)); |
9688c1dd | 359 | relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number |
360 | relid[1] =-1 ; // means CPV | |
361 | relid[2] = cpvDigit->GetXpad() ; // column number of a pad | |
362 | relid[3] = cpvDigit->GetYpad() ; // row number of a pad | |
363 | ||
364 | // get the absolute Id number | |
365 | GetGeometry()->RelToAbsNumbering(relid, absid) ; | |
366 | ||
367 | // add current digit to the temporary hit list | |
368 | ||
471193a8 | 369 | xyzte[3] = gMC->TrackTime() ; |
370 | xyzte[4] = cpvDigit->GetQpad() ; // amplitude in a pad | |
9688c1dd | 371 | primary = -1; // No need in primary for CPV |
471193a8 | 372 | AddHit(fIshunt, primary, tracknumber, absid, xyzte); |
9688c1dd | 373 | |
374 | if (cpvDigit->GetQpad() > 0.02) { | |
375 | xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5); | |
376 | zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5); | |
377 | qsum += cpvDigit->GetQpad(); | |
fa412d9b | 378 | } |
fa412d9b | 379 | } |
e534a69d | 380 | if (cpvDigits) { |
381 | cpvDigits->Delete(); | |
382 | delete cpvDigits; | |
383 | cpvDigits=0; | |
384 | } | |
9688c1dd | 385 | } |
037cc66d | 386 | |
9688c1dd | 387 | |
388 | ||
fa412d9b | 389 | if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) { // We are inside a PBWO crystal |
9688c1dd | 390 | |
fa412d9b | 391 | gMC->TrackPosition(pos) ; |
471193a8 | 392 | xyzte[0] = pos[0] ; |
393 | xyzte[1] = pos[1] ; | |
394 | xyzte[2] = pos[2] ; | |
597e6309 | 395 | |
9688c1dd | 396 | Float_t global[3], local[3] ; |
397 | global[0] = pos[0] ; | |
398 | global[1] = pos[1] ; | |
399 | global[2] = pos[2] ; | |
400 | Float_t lostenergy = gMC->Edep(); | |
f6d1e5e1 | 401 | |
402 | //Put in the TreeK particle entering PHOS and all its parents | |
403 | if ( gMC->IsTrackEntering() ){ | |
404 | Float_t xyzd[3] ; | |
471193a8 | 405 | gMC -> Gmtod (xyzte, xyzd, 1); // transform coordinate from master to daughter system |
f6d1e5e1 | 406 | if (xyzd[1] > GetGeometry()->GetCrystalSize(1)/2-0.002 || |
407 | xyzd[1] < -GetGeometry()->GetCrystalSize(1)/2+0.002) { | |
408 | TParticle * part = 0 ; | |
409 | Int_t parent = gAlice->CurrentTrack() ; | |
410 | while ( parent != -1 ) { | |
411 | part = gAlice->Particle(parent) ; | |
412 | part->SetBit(kKeepBit); | |
413 | parent = part->GetFirstMother() ; | |
414 | } | |
415 | } | |
416 | } | |
9688c1dd | 417 | if ( lostenergy != 0 ) { // Track is inside the crystal and deposits some energy |
471193a8 | 418 | xyzte[3] = gMC->TrackTime() ; |
f6d1e5e1 | 419 | |
9688c1dd | 420 | gMC->CurrentVolOffID(10, moduleNumber) ; // get the PHOS module number ; |
7b326aac | 421 | |
9688c1dd | 422 | Int_t strip ; |
423 | gMC->CurrentVolOffID(3, strip); | |
424 | Int_t cell ; | |
425 | gMC->CurrentVolOffID(2, cell); | |
f6d1e5e1 | 426 | |
9688c1dd | 427 | Int_t row = 1 + GetGeometry()->GetNZ() - strip % GetGeometry()->GetNZ() ; |
428 | Int_t col = (Int_t) TMath::Ceil((Double_t) strip/GetGeometry()->GetNZ()) -1 ; | |
f6d1e5e1 | 429 | |
9688c1dd | 430 | absid = (moduleNumber-1)*GetGeometry()->GetNCristalsInModule() + |
431 | row + (col*GetGeometry()->GetEMCAGeometry()->GetNCellsInStrip() + cell-1)*GetGeometry()->GetNZ() ; | |
f6d1e5e1 | 432 | |
9688c1dd | 433 | gMC->Gmtod(global, local, 1) ; |
434 | ||
471193a8 | 435 | //Calculates the light yield, the number of photons produced in the |
9688c1dd | 436 | //crystal |
27f33ee5 | 437 | Float_t lightYield = gRandom->Poisson(fLightFactor * lostenergy * |
9688c1dd | 438 | exp(-fLightYieldAttenuation * |
439 | (local[1]+GetGeometry()->GetCrystalSize(1)/2.0 )) | |
440 | ) ; | |
471193a8 | 441 | |
9688c1dd | 442 | //Calculates de energy deposited in the crystal |
471193a8 | 443 | xyzte[4] = fAPDFactor * lightYield ; |
9688c1dd | 444 | |
445 | // add current hit to the hit list | |
f6d1e5e1 | 446 | //cout << "AliPHOSv1::StepManager " << primary << " " << tracknumber << endl ; |
471193a8 | 447 | AddHit(fIshunt, primary,tracknumber, absid, xyzte); |
9688c1dd | 448 | |
94de8339 | 449 | // fill the relevant QA Checkables |
471193a8 | 450 | fQATotEner->Update( xyzte[4] ) ; // total energy in PHOS |
451 | (static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[moduleNumber-1]))->Update( xyzte[4] ) ; // energy in this block | |
f6d1e5e1 | 452 | |
fa412d9b | 453 | } // there is deposited energy |
454 | } // we are inside a PHOS Xtal | |
f6d1e5e1 | 455 | |
fa412d9b | 456 | } |
457 | ||
458 | //____________________________________________________________________________ | |
459 | void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, Int_t moduleNumber, TClonesArray *cpvDigits) | |
460 | { | |
461 | // ------------------------------------------------------------------------ | |
462 | // Digitize one CPV hit: | |
463 | // On input take exact 4-momentum p and position zxhit of the hit, | |
464 | // find the pad response around this hit and | |
465 | // put the amplitudes in the pads into array digits | |
466 | // | |
467 | // Author: Yuri Kharlov (after Serguei Sadovsky) | |
468 | // 2 October 2000 | |
469 | // ------------------------------------------------------------------------ | |
470 | ||
fa7cce36 | 471 | const Float_t kCelWr = GetGeometry()->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad) |
a3dfe79c | 472 | const Float_t kDetR = 0.1; // Relative energy fluctuation in track for 100 e- |
473 | const Float_t kdEdx = 4.0; // Average energy loss in CPV; | |
474 | const Int_t kNgamz = 5; // Ionization size in Z | |
475 | const Int_t kNgamx = 9; // Ionization size in Phi | |
476 | const Float_t kNoise = 0.03; // charge noise in one pad | |
fa412d9b | 477 | |
478 | Float_t rnor1,rnor2; | |
479 | ||
480 | // Just a reminder on axes notation in the CPV module: | |
481 | // axis Z goes along the beam | |
482 | // axis X goes across the beam in the module plane | |
483 | // axis Y is a normal to the module plane showing from the IP | |
484 | ||
485 | Float_t hitX = zxhit[0]; | |
486 | Float_t hitZ =-zxhit[1]; | |
487 | Float_t pX = p.Px(); | |
488 | Float_t pZ =-p.Pz(); | |
489 | Float_t pNorm = p.Py(); | |
a3dfe79c | 490 | Float_t eloss = kdEdx; |
3d402178 | 491 | |
7b326aac | 492 | // cout << "CPVDigitize: YVK : "<<hitX<<" "<<hitZ<<" | "<<pX<<" "<<pZ<<" "<<pNorm<<endl; |
493 | ||
fa7cce36 | 494 | Float_t dZY = pZ/pNorm * GetGeometry()->GetCPVGasThickness(); |
495 | Float_t dXY = pX/pNorm * GetGeometry()->GetCPVGasThickness(); | |
fa412d9b | 496 | gRandom->Rannor(rnor1,rnor2); |
a3dfe79c | 497 | eloss *= (1 + kDetR*rnor1) * |
fa7cce36 | 498 | TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(GetGeometry()->GetCPVGasThickness(),2))); |
499 | Float_t zhit1 = hitZ + GetGeometry()->GetCPVActiveSize(1)/2 - dZY/2; | |
500 | Float_t xhit1 = hitX + GetGeometry()->GetCPVActiveSize(0)/2 - dXY/2; | |
fa412d9b | 501 | Float_t zhit2 = zhit1 + dZY; |
502 | Float_t xhit2 = xhit1 + dXY; | |
503 | ||
a3dfe79c | 504 | Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in" |
505 | Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out" | |
fa412d9b | 506 | |
507 | Int_t nIter; | |
508 | Float_t zxe[3][5]; | |
509 | if (iwht1==iwht2) { // incline 1-wire hit | |
510 | nIter = 2; | |
511 | zxe[0][0] = (zhit1 + zhit2 - dZY*0.57735) / 2; | |
a3dfe79c | 512 | zxe[1][0] = (iwht1 + 0.5) * kCelWr; |
513 | zxe[2][0] = eloss/2; | |
fa412d9b | 514 | zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2; |
a3dfe79c | 515 | zxe[1][1] = (iwht1 + 0.5) * kCelWr; |
516 | zxe[2][1] = eloss/2; | |
fa412d9b | 517 | } |
518 | else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit | |
519 | nIter = 3; | |
520 | Int_t iwht3 = (iwht1 + iwht2) / 2; | |
a3dfe79c | 521 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; // wire 1 |
522 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; // wire 2 | |
523 | Float_t xwht3 = (iwht3 + 0.5) * kCelWr; // wire 3 | |
fa412d9b | 524 | Float_t xwr13 = (xwht1 + xwht3) / 2; // center 13 |
525 | Float_t xwr23 = (xwht2 + xwht3) / 2; // center 23 | |
526 | Float_t dxw1 = xhit1 - xwr13; | |
527 | Float_t dxw2 = xhit2 - xwr23; | |
a3dfe79c | 528 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); |
529 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); | |
530 | Float_t egm3 = kCelWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); | |
fa412d9b | 531 | zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2; |
532 | zxe[1][0] = xwht1; | |
a3dfe79c | 533 | zxe[2][0] = eloss * egm1; |
fa412d9b | 534 | zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2; |
535 | zxe[1][1] = xwht2; | |
a3dfe79c | 536 | zxe[2][1] = eloss * egm2; |
fa412d9b | 537 | zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1; |
538 | zxe[1][2] = xwht3; | |
a3dfe79c | 539 | zxe[2][2] = eloss * egm3; |
fa412d9b | 540 | } |
541 | else { // incline 2-wire hit | |
542 | nIter = 2; | |
a3dfe79c | 543 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; |
544 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; | |
fa412d9b | 545 | Float_t xwr12 = (xwht1 + xwht2) / 2; |
546 | Float_t dxw1 = xhit1 - xwr12; | |
547 | Float_t dxw2 = xhit2 - xwr12; | |
548 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); | |
549 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); | |
550 | zxe[0][0] = (zhit1 + zhit2 - dZY*egm1) / 2; | |
551 | zxe[1][0] = xwht1; | |
a3dfe79c | 552 | zxe[2][0] = eloss * egm1; |
fa412d9b | 553 | zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2; |
554 | zxe[1][1] = xwht2; | |
a3dfe79c | 555 | zxe[2][1] = eloss * egm2; |
fa412d9b | 556 | } |
bea63bea | 557 | |
fa412d9b | 558 | // Finite size of ionization region |
559 | ||
fa7cce36 | 560 | Int_t nCellZ = GetGeometry()->GetNumberOfCPVPadsZ(); |
561 | Int_t nCellX = GetGeometry()->GetNumberOfCPVPadsPhi(); | |
a3dfe79c | 562 | Int_t nz3 = (kNgamz+1)/2; |
563 | Int_t nx3 = (kNgamx+1)/2; | |
564 | cpvDigits->Expand(nIter*kNgamx*kNgamz); | |
29b077b5 | 565 | TClonesArray &ldigits = *(static_cast<TClonesArray *>(cpvDigits)); |
fa412d9b | 566 | |
567 | for (Int_t iter=0; iter<nIter; iter++) { | |
568 | ||
569 | Float_t zhit = zxe[0][iter]; | |
570 | Float_t xhit = zxe[1][iter]; | |
571 | Float_t qhit = zxe[2][iter]; | |
fa7cce36 | 572 | Float_t zcell = zhit / GetGeometry()->GetPadSizeZ(); |
573 | Float_t xcell = xhit / GetGeometry()->GetPadSizePhi(); | |
fa412d9b | 574 | if ( zcell<=0 || xcell<=0 || |
575 | zcell>=nCellZ || xcell>=nCellX) return; | |
576 | Int_t izcell = (Int_t) zcell; | |
577 | Int_t ixcell = (Int_t) xcell; | |
578 | Float_t zc = zcell - izcell - 0.5; | |
579 | Float_t xc = xcell - ixcell - 0.5; | |
a3dfe79c | 580 | for (Int_t iz=1; iz<=kNgamz; iz++) { |
fa412d9b | 581 | Int_t kzg = izcell + iz - nz3; |
582 | if (kzg<=0 || kzg>nCellZ) continue; | |
583 | Float_t zg = (Float_t)(iz-nz3) - zc; | |
a3dfe79c | 584 | for (Int_t ix=1; ix<=kNgamx; ix++) { |
fa412d9b | 585 | Int_t kxg = ixcell + ix - nx3; |
586 | if (kxg<=0 || kxg>nCellX) continue; | |
587 | Float_t xg = (Float_t)(ix-nx3) - xc; | |
588 | ||
589 | // Now calculate pad response | |
590 | Float_t qpad = CPVPadResponseFunction(qhit,zg,xg); | |
a3dfe79c | 591 | qpad += kNoise*rnor2; |
fa412d9b | 592 | if (qpad<0) continue; |
593 | ||
594 | // Fill the array with pad response ID and amplitude | |
3d402178 | 595 | new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad); |
fa412d9b | 596 | } |
fa412d9b | 597 | } |
fa412d9b | 598 | } |
599 | } | |
600 | ||
601 | //____________________________________________________________________________ | |
602 | Float_t AliPHOSv1::CPVPadResponseFunction(Float_t qhit, Float_t zhit, Float_t xhit) { | |
603 | // ------------------------------------------------------------------------ | |
604 | // Calculate the amplitude in one CPV pad using the | |
605 | // cumulative pad response function | |
606 | // Author: Yuri Kharlov (after Serguei Sadovski) | |
607 | // 3 October 2000 | |
608 | // ------------------------------------------------------------------------ | |
609 | ||
fa7cce36 | 610 | Double_t dz = GetGeometry()->GetPadSizeZ() / 2; |
611 | Double_t dx = GetGeometry()->GetPadSizePhi() / 2; | |
612 | Double_t z = zhit * GetGeometry()->GetPadSizeZ(); | |
613 | Double_t x = xhit * GetGeometry()->GetPadSizePhi(); | |
fa412d9b | 614 | Double_t amplitude = qhit * |
615 | (CPVCumulPadResponse(z+dz,x+dx) - CPVCumulPadResponse(z+dz,x-dx) - | |
616 | CPVCumulPadResponse(z-dz,x+dx) + CPVCumulPadResponse(z-dz,x-dx)); | |
617 | return (Float_t)amplitude; | |
7587f5a5 | 618 | } |
619 | ||
fa412d9b | 620 | //____________________________________________________________________________ |
621 | Double_t AliPHOSv1::CPVCumulPadResponse(Double_t x, Double_t y) { | |
622 | // ------------------------------------------------------------------------ | |
623 | // Cumulative pad response function | |
624 | // It includes several terms from the CF decomposition in electrostatics | |
625 | // Note: this cumulative function is wrong since omits some terms | |
626 | // but the cell amplitude obtained with it is correct because | |
627 | // these omitting terms cancel | |
628 | // Author: Yuri Kharlov (after Serguei Sadovski) | |
629 | // 3 October 2000 | |
630 | // ------------------------------------------------------------------------ | |
631 | ||
a3dfe79c | 632 | const Double_t kA=1.0; |
633 | const Double_t kB=0.7; | |
fa412d9b | 634 | |
635 | Double_t r2 = x*x + y*y; | |
636 | Double_t xy = x*y; | |
637 | Double_t cumulPRF = 0; | |
638 | for (Int_t i=0; i<=4; i++) { | |
a3dfe79c | 639 | Double_t b1 = (2*i + 1) * kB; |
fa412d9b | 640 | cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) ); |
641 | } | |
a3dfe79c | 642 | cumulPRF *= kA/(2*TMath::Pi()); |
fa412d9b | 643 | return cumulPRF; |
644 | } | |
7eb9d12d | 645 |