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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" |
7587f5a5 | 39 | |
5f20d3fb | 40 | |
7587f5a5 | 41 | // --- Standard library --- |
42 | ||
de9ec31b | 43 | #include <stdio.h> |
44 | #include <string.h> | |
45 | #include <stdlib.h> | |
46 | #include <strstream.h> | |
7587f5a5 | 47 | |
48 | // --- AliRoot header files --- | |
49 | ||
50 | #include "AliPHOSv1.h" | |
51 | #include "AliPHOSHit.h" | |
97cee223 | 52 | #include "AliPHOSCPVDigit.h" |
7587f5a5 | 53 | #include "AliRun.h" |
54 | #include "AliConst.h" | |
94de3818 | 55 | #include "AliMC.h" |
97cee223 | 56 | #include "AliPHOSGeometry.h" |
7b326aac | 57 | #include "AliPHOSQAIntCheckable.h" |
58 | #include "AliPHOSQAFloatCheckable.h" | |
59 | #include "AliPHOSQAMeanChecker.h" | |
7587f5a5 | 60 | |
61 | ClassImp(AliPHOSv1) | |
62 | ||
bea63bea | 63 | //____________________________________________________________________________ |
02ab1add | 64 | AliPHOSv1::AliPHOSv1(): |
65 | AliPHOSv0() | |
bea63bea | 66 | { |
735e58f1 | 67 | // default ctor: initialze data memebers |
68 | fQAHitsMul = 0 ; | |
69 | fQAHitsMulB = 0 ; | |
70 | fQATotEner = 0 ; | |
71 | fQATotEnerB = 0 ; | |
bea63bea | 72 | } |
73 | ||
7587f5a5 | 74 | //____________________________________________________________________________ |
75 | AliPHOSv1::AliPHOSv1(const char *name, const char *title): | |
7b326aac | 76 | AliPHOSv0(name,title) |
7587f5a5 | 77 | { |
5f20d3fb | 78 | // ctor : title is used to identify the layout |
fa412d9b | 79 | // GPS2 = 5 modules (EMC + PPSD) |
80 | // IHEP = 5 modules (EMC + CPV ) | |
ed4205d8 | 81 | // MIXT = 4 modules (EMC + CPV ) and 1 module (EMC + PPSD) |
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) ; |
5f20d3fb | 97 | |
ed4205d8 | 98 | fNhits = 0 ; |
5f20d3fb | 99 | |
5f20d3fb | 100 | fIshunt = 1 ; // All hits are associated with primary particles |
7b326aac | 101 | |
fa7cce36 | 102 | Int_t nb = GetGeometry()->GetNModules() ; |
fa412d9b | 103 | |
7b326aac | 104 | // create checkables |
105 | fQAHitsMul = new AliPHOSQAIntCheckable("HitsM") ; | |
106 | fQATotEner = new AliPHOSQAFloatCheckable("TotEn") ; | |
107 | fQAHitsMulB = new TClonesArray("AliPHOSQAIntCheckable",nb) ; | |
108 | fQATotEnerB = new TClonesArray("AliPHOSQAFloatCheckable", nb); | |
109 | char tempo[20] ; | |
110 | Int_t i ; | |
111 | for ( i = 0 ; i < nb ; i++ ) { | |
112 | sprintf(tempo, "HitsMB%d", i+1) ; | |
113 | new( (*fQAHitsMulB)[i]) AliPHOSQAIntCheckable(tempo) ; | |
114 | sprintf(tempo, "TotEnB%d", i+1) ; | |
115 | new( (*fQATotEnerB)[i] ) AliPHOSQAFloatCheckable(tempo) ; | |
116 | } | |
117 | ||
7b326aac | 118 | AliPHOSQAMeanChecker * hmc = new AliPHOSQAMeanChecker("HitsMul", 100. ,25.) ; |
119 | AliPHOSQAMeanChecker * emc = new AliPHOSQAMeanChecker("TotEner", 10. ,5.) ; | |
120 | AliPHOSQAMeanChecker * bhmc = new AliPHOSQAMeanChecker("HitsMulB", 100. ,5.) ; | |
121 | AliPHOSQAMeanChecker * bemc = new AliPHOSQAMeanChecker("TotEnerB", 2. ,.5) ; | |
122 | ||
123 | // associate checkables and checkers | |
124 | fQAHitsMul->AddChecker(hmc) ; | |
125 | fQATotEner->AddChecker(emc) ; | |
126 | for ( i = 0 ; i < nb ; i++ ) { | |
127 | ((AliPHOSQAIntCheckable*)(*fQAHitsMulB)[i])->AddChecker(bhmc) ; | |
128 | ((AliPHOSQAFloatCheckable*)(*fQATotEnerB)[i])->AddChecker(bemc) ; | |
129 | } | |
5f20d3fb | 130 | } |
131 | ||
7587f5a5 | 132 | //____________________________________________________________________________ |
bea63bea | 133 | AliPHOSv1::~AliPHOSv1() |
b2a60966 | 134 | { |
bea63bea | 135 | // dtor |
5f20d3fb | 136 | |
ed4205d8 | 137 | if ( fHits) { |
138 | fHits->Delete() ; | |
139 | delete fHits ; | |
140 | fHits = 0 ; | |
8dfa469d | 141 | } |
7587f5a5 | 142 | } |
143 | ||
7587f5a5 | 144 | //____________________________________________________________________________ |
b37750a6 | 145 | void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits) |
bea63bea | 146 | { |
147 | // Add a hit to the hit list. | |
5f20d3fb | 148 | // A PHOS hit is the sum of all hits in a single crystal |
149 | // or in a single PPSD gas cell | |
bea63bea | 150 | |
5f20d3fb | 151 | Int_t hitCounter ; |
bea63bea | 152 | AliPHOSHit *newHit ; |
5f20d3fb | 153 | AliPHOSHit *curHit ; |
154 | Bool_t deja = kFALSE ; | |
fa7cce36 | 155 | AliPHOSGeometry * geom = GetGeometry() ; |
bea63bea | 156 | |
b37750a6 | 157 | newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits) ; |
bea63bea | 158 | |
7854a24a | 159 | for ( hitCounter = fNhits-1 ; hitCounter >= 0 && !deja ; hitCounter-- ) { |
ed4205d8 | 160 | curHit = (AliPHOSHit*) (*fHits)[hitCounter] ; |
4e669ac8 | 161 | if(curHit->GetPrimary() != primary) break ; // We add hits with the same primary, while GEANT treats primaries succesively |
ed4205d8 | 162 | if( *curHit == *newHit ) { |
163 | *curHit = *curHit + *newHit ; | |
164 | deja = kTRUE ; | |
5f20d3fb | 165 | } |
166 | } | |
167 | ||
168 | if ( !deja ) { | |
ed4205d8 | 169 | new((*fHits)[fNhits]) AliPHOSHit(*newHit) ; |
7b326aac | 170 | // get the block Id number |
fa7cce36 | 171 | Int_t * relid = new Int_t[geom->GetNModules()] ; |
172 | geom->AbsToRelNumbering(Id, relid) ; | |
7b326aac | 173 | // and fill the relevant QA checkable (only if in PbW04) |
174 | if ( relid[1] == 0 ) { | |
175 | fQAHitsMul->Update(1) ; | |
176 | ((AliPHOSQAIntCheckable*)(*fQAHitsMulB)[relid[0]-1])->Update(1) ; | |
177 | } | |
178 | delete relid ; | |
ed4205d8 | 179 | fNhits++ ; |
5f20d3fb | 180 | } |
181 | ||
bea63bea | 182 | delete newHit; |
bea63bea | 183 | } |
184 | ||
7b326aac | 185 | //____________________________________________________________________________ |
186 | void AliPHOSv1::FinishPrimary() | |
187 | { | |
188 | // called at the end of each track (primary) by AliRun | |
189 | // hits are reset for each new track | |
190 | // accumulate the total hit-multiplicity | |
191 | // if ( fQAHitsMul ) | |
192 | // fQAHitsMul->Update( fHits->GetEntriesFast() ) ; | |
193 | ||
194 | } | |
195 | ||
196 | //____________________________________________________________________________ | |
197 | void AliPHOSv1::FinishEvent() | |
198 | { | |
199 | // called at the end of each event by AliRun | |
200 | // accumulate the hit-multiplicity and total energy per block | |
201 | // if the values have been updated check it | |
202 | ||
203 | if ( fQATotEner ) { | |
204 | if ( fQATotEner->HasChanged() ) { | |
205 | fQATotEner->CheckMe() ; | |
206 | fQATotEner->Reset() ; | |
207 | } | |
208 | } | |
209 | ||
210 | Int_t i ; | |
211 | if ( fQAHitsMulB && fQATotEnerB ) { | |
fa7cce36 | 212 | for (i = 0 ; i < GetGeometry()->GetNModules() ; i++) { |
7b326aac | 213 | AliPHOSQAIntCheckable * ci = (AliPHOSQAIntCheckable*)(*fQAHitsMulB)[i] ; |
214 | AliPHOSQAFloatCheckable* cf = (AliPHOSQAFloatCheckable*)(*fQATotEnerB)[i] ; | |
215 | if ( ci->HasChanged() ) { | |
216 | ci->CheckMe() ; | |
217 | ci->Reset() ; | |
218 | } | |
219 | if ( cf->HasChanged() ) { | |
220 | cf->CheckMe() ; | |
221 | cf->Reset() ; | |
222 | } | |
223 | } | |
224 | } | |
225 | ||
226 | // check the total multiplicity | |
227 | ||
228 | if ( fQAHitsMul ) { | |
229 | if ( fQAHitsMul->HasChanged() ) { | |
230 | fQAHitsMul->CheckMe() ; | |
231 | fQAHitsMul->Reset() ; | |
232 | } | |
233 | } | |
234 | } | |
235 | ||
5f20d3fb | 236 | //____________________________________________________________________________ |
7587f5a5 | 237 | void AliPHOSv1::StepManager(void) |
238 | { | |
b2a60966 | 239 | // Accumulates hits as long as the track stays in a single crystal or PPSD gas Cell |
b2a60966 | 240 | |
4f5bbbd4 | 241 | Int_t relid[4] ; // (box, layer, row, column) indices |
242 | Int_t absid ; // absolute cell ID number | |
2168f43b | 243 | Float_t xyze[4]={0,0,0,0} ; // position wrt MRS and energy deposited |
4f5bbbd4 | 244 | TLorentzVector pos ; // Lorentz vector of the track current position |
fa412d9b | 245 | Int_t copy ; |
7587f5a5 | 246 | |
bea63bea | 247 | Int_t tracknumber = gAlice->CurrentTrack() ; |
fa412d9b | 248 | Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() ); |
fa7cce36 | 249 | TString name = GetGeometry()->GetName() ; |
037cc66d | 250 | |
251 | ||
ed4205d8 | 252 | if ( name == "GPS2" || name == "MIXT" ) { // ======> CPV is a GPS' PPSD |
fa412d9b | 253 | |
dc999bc0 | 254 | if( gMC->CurrentVolID(copy) == gMC->VolId("PPCE") ) // We are inside a gas cell |
7587f5a5 | 255 | { |
256 | gMC->TrackPosition(pos) ; | |
257 | xyze[0] = pos[0] ; | |
258 | xyze[1] = pos[1] ; | |
259 | xyze[2] = pos[2] ; | |
bea63bea | 260 | xyze[3] = gMC->Edep() ; |
7587f5a5 | 261 | |
b37750a6 | 262 | if ( xyze[3] != 0 ) { // there is deposited energy |
7587f5a5 | 263 | gMC->CurrentVolOffID(5, relid[0]) ; // get the PHOS Module number |
fad3e5b9 | 264 | if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(5),"PHO1") == 0 ){ |
fa7cce36 | 265 | relid[0] += GetGeometry()->GetNModules() - GetGeometry()->GetNPPSDModules(); |
fad3e5b9 | 266 | } |
7587f5a5 | 267 | gMC->CurrentVolOffID(3, relid[1]) ; // get the Micromegas Module number |
fa7cce36 | 268 | // 1-> GetGeometry()->GetNumberOfModulesPhi() * GetGeometry()->GetNumberOfModulesZ() upper |
269 | // > GetGeometry()->GetNumberOfModulesPhi() * GetGeometry()->GetNumberOfModulesZ() lower | |
7587f5a5 | 270 | gMC->CurrentVolOffID(1, relid[2]) ; // get the row number of the cell |
271 | gMC->CurrentVolID(relid[3]) ; // get the column number | |
272 | ||
273 | // get the absolute Id number | |
274 | ||
fa7cce36 | 275 | GetGeometry()->RelToAbsNumbering(relid, absid) ; |
7587f5a5 | 276 | |
bea63bea | 277 | // add current hit to the hit list |
b37750a6 | 278 | AddHit(fIshunt, primary, tracknumber, absid, xyze); |
037cc66d | 279 | |
7587f5a5 | 280 | |
281 | } // there is deposited energy | |
fa412d9b | 282 | } // We are inside the gas of the CPV |
283 | } // GPS2 configuration | |
284 | ||
ed4205d8 | 285 | if ( name == "IHEP" || name == "MIXT" ) { // ======> CPV is a IHEP's one |
fa412d9b | 286 | |
287 | // Yuri Kharlov, 28 September 2000 | |
288 | ||
97cee223 | 289 | if( gMC->CurrentVolID(copy) == gMC->VolId("PCPQ") && |
b37750a6 | 290 | (gMC->IsTrackEntering() ) && |
037cc66d | 291 | gMC->TrackCharge() != 0) { |
fa412d9b | 292 | |
b37750a6 | 293 | gMC -> TrackPosition(pos); |
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 | ||
299 | Float_t xyd[3]={0,0,0} ; //local posiiton of the entering | |
300 | xyd[0] = xyzd[0]; | |
301 | xyd[1] =-xyzd[1]; | |
302 | xyd[2] =-xyzd[2]; | |
303 | ||
304 | ||
305 | // Current momentum of the hit's track in the local ref. system | |
306 | TLorentzVector pmom ; //momentum of the particle initiated hit | |
307 | gMC -> TrackMomentum(pmom); | |
308 | Float_t pm[3], pd[3]; | |
309 | for (i=0; i<3; i++) pm[i] = pmom[i]; | |
310 | gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system | |
311 | pmom[0] = pd[0]; | |
312 | pmom[1] =-pd[1]; | |
313 | pmom[2] =-pd[2]; | |
314 | ||
037cc66d | 315 | // Digitize the current CPV hit: |
316 | ||
317 | // 1. find pad response and | |
fa412d9b | 318 | |
a3dfe79c | 319 | Int_t moduleNumber; |
320 | gMC->CurrentVolOffID(3,moduleNumber); | |
321 | moduleNumber--; | |
fa412d9b | 322 | |
fa412d9b | 323 | |
3d402178 | 324 | TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit |
a3dfe79c | 325 | CPVDigitize(pmom,xyd,moduleNumber,cpvDigits); |
fa412d9b | 326 | |
327 | Float_t xmean = 0; | |
328 | Float_t zmean = 0; | |
329 | Float_t qsum = 0; | |
cd461ab8 | 330 | Int_t idigit,ndigits; |
fa412d9b | 331 | |
332 | // 2. go through the current digit list and sum digits in pads | |
333 | ||
334 | ndigits = cpvDigits->GetEntriesFast(); | |
cd461ab8 | 335 | for (idigit=0; idigit<ndigits-1; idigit++) { |
3d402178 | 336 | AliPHOSCPVDigit *cpvDigit1 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit); |
fa412d9b | 337 | Float_t x1 = cpvDigit1->GetXpad() ; |
338 | Float_t z1 = cpvDigit1->GetYpad() ; | |
339 | for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) { | |
3d402178 | 340 | AliPHOSCPVDigit *cpvDigit2 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(jdigit); |
fa412d9b | 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) ; | |
347 | } | |
348 | } | |
349 | } | |
350 | cpvDigits->Compress() ; | |
351 | ||
352 | // 3. add digits to temporary hit list fTmpHits | |
353 | ||
354 | ndigits = cpvDigits->GetEntriesFast(); | |
cd461ab8 | 355 | for (idigit=0; idigit<ndigits; idigit++) { |
3d402178 | 356 | AliPHOSCPVDigit *cpvDigit = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit); |
a3dfe79c | 357 | relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number |
fa412d9b | 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 | |
fa7cce36 | 363 | GetGeometry()->RelToAbsNumbering(relid, absid) ; |
fa412d9b | 364 | |
365 | // add current digit to the temporary hit list | |
366 | xyze[0] = 0. ; | |
367 | xyze[1] = 0. ; | |
368 | xyze[2] = 0. ; | |
369 | xyze[3] = cpvDigit->GetQpad() ; // amplitude in a pad | |
370 | primary = -1; // No need in primary for CPV | |
b37750a6 | 371 | AddHit(fIshunt, primary, tracknumber, absid, xyze); |
fa412d9b | 372 | |
373 | if (cpvDigit->GetQpad() > 0.02) { | |
374 | xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5); | |
375 | zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5); | |
376 | qsum += cpvDigit->GetQpad(); | |
377 | } | |
378 | } | |
379 | delete cpvDigits; | |
380 | } | |
381 | } // end of IHEP configuration | |
7587f5a5 | 382 | |
037cc66d | 383 | |
fa412d9b | 384 | if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) { // We are inside a PBWO crystal |
385 | gMC->TrackPosition(pos) ; | |
386 | xyze[0] = pos[0] ; | |
387 | xyze[1] = pos[1] ; | |
388 | xyze[2] = pos[2] ; | |
389 | xyze[3] = gMC->Edep() ; | |
ed4205d8 | 390 | |
037cc66d | 391 | |
b37750a6 | 392 | if ( xyze[3] != 0 ) { // Track is inside the crystal and deposits some energy |
ed4205d8 | 393 | |
fa412d9b | 394 | gMC->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ; |
7b326aac | 395 | |
396 | // fill the relevant QA Checkables | |
397 | fQATotEner->Update( xyze[3] ) ; // total energy in PHOS | |
398 | ((AliPHOSQAFloatCheckable*)(*fQATotEnerB)[relid[0]-1])->Update( xyze[3] ) ; // energy in this block | |
037cc66d | 399 | |
fad3e5b9 | 400 | if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(10),"PHO1") == 0 ) |
fa7cce36 | 401 | relid[0] += GetGeometry()->GetNModules() - GetGeometry()->GetNPPSDModules(); |
fad3e5b9 | 402 | |
fa412d9b | 403 | relid[1] = 0 ; // means PBW04 |
404 | gMC->CurrentVolOffID(4, relid[2]) ; // get the row number inside the module | |
405 | gMC->CurrentVolOffID(3, relid[3]) ; // get the cell number inside the module | |
406 | ||
407 | // get the absolute Id number | |
fa7cce36 | 408 | GetGeometry()->RelToAbsNumbering(relid, absid) ; |
ed4205d8 | 409 | |
fa412d9b | 410 | // add current hit to the hit list |
b37750a6 | 411 | AddHit(fIshunt, primary,tracknumber, absid, xyze); |
037cc66d | 412 | |
ed4205d8 | 413 | |
fa412d9b | 414 | } // there is deposited energy |
415 | } // we are inside a PHOS Xtal | |
416 | } | |
417 | ||
418 | //____________________________________________________________________________ | |
419 | void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, Int_t moduleNumber, TClonesArray *cpvDigits) | |
420 | { | |
421 | // ------------------------------------------------------------------------ | |
422 | // Digitize one CPV hit: | |
423 | // On input take exact 4-momentum p and position zxhit of the hit, | |
424 | // find the pad response around this hit and | |
425 | // put the amplitudes in the pads into array digits | |
426 | // | |
427 | // Author: Yuri Kharlov (after Serguei Sadovsky) | |
428 | // 2 October 2000 | |
429 | // ------------------------------------------------------------------------ | |
430 | ||
fa7cce36 | 431 | const Float_t kCelWr = GetGeometry()->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad) |
a3dfe79c | 432 | const Float_t kDetR = 0.1; // Relative energy fluctuation in track for 100 e- |
433 | const Float_t kdEdx = 4.0; // Average energy loss in CPV; | |
434 | const Int_t kNgamz = 5; // Ionization size in Z | |
435 | const Int_t kNgamx = 9; // Ionization size in Phi | |
436 | const Float_t kNoise = 0.03; // charge noise in one pad | |
fa412d9b | 437 | |
438 | Float_t rnor1,rnor2; | |
439 | ||
440 | // Just a reminder on axes notation in the CPV module: | |
441 | // axis Z goes along the beam | |
442 | // axis X goes across the beam in the module plane | |
443 | // axis Y is a normal to the module plane showing from the IP | |
444 | ||
445 | Float_t hitX = zxhit[0]; | |
446 | Float_t hitZ =-zxhit[1]; | |
447 | Float_t pX = p.Px(); | |
448 | Float_t pZ =-p.Pz(); | |
449 | Float_t pNorm = p.Py(); | |
a3dfe79c | 450 | Float_t eloss = kdEdx; |
3d402178 | 451 | |
7b326aac | 452 | // cout << "CPVDigitize: YVK : "<<hitX<<" "<<hitZ<<" | "<<pX<<" "<<pZ<<" "<<pNorm<<endl; |
453 | ||
fa7cce36 | 454 | Float_t dZY = pZ/pNorm * GetGeometry()->GetCPVGasThickness(); |
455 | Float_t dXY = pX/pNorm * GetGeometry()->GetCPVGasThickness(); | |
fa412d9b | 456 | gRandom->Rannor(rnor1,rnor2); |
a3dfe79c | 457 | eloss *= (1 + kDetR*rnor1) * |
fa7cce36 | 458 | TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(GetGeometry()->GetCPVGasThickness(),2))); |
459 | Float_t zhit1 = hitZ + GetGeometry()->GetCPVActiveSize(1)/2 - dZY/2; | |
460 | Float_t xhit1 = hitX + GetGeometry()->GetCPVActiveSize(0)/2 - dXY/2; | |
fa412d9b | 461 | Float_t zhit2 = zhit1 + dZY; |
462 | Float_t xhit2 = xhit1 + dXY; | |
463 | ||
a3dfe79c | 464 | Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in" |
465 | Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out" | |
fa412d9b | 466 | |
467 | Int_t nIter; | |
468 | Float_t zxe[3][5]; | |
469 | if (iwht1==iwht2) { // incline 1-wire hit | |
470 | nIter = 2; | |
471 | zxe[0][0] = (zhit1 + zhit2 - dZY*0.57735) / 2; | |
a3dfe79c | 472 | zxe[1][0] = (iwht1 + 0.5) * kCelWr; |
473 | zxe[2][0] = eloss/2; | |
fa412d9b | 474 | zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2; |
a3dfe79c | 475 | zxe[1][1] = (iwht1 + 0.5) * kCelWr; |
476 | zxe[2][1] = eloss/2; | |
fa412d9b | 477 | } |
478 | else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit | |
479 | nIter = 3; | |
480 | Int_t iwht3 = (iwht1 + iwht2) / 2; | |
a3dfe79c | 481 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; // wire 1 |
482 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; // wire 2 | |
483 | Float_t xwht3 = (iwht3 + 0.5) * kCelWr; // wire 3 | |
fa412d9b | 484 | Float_t xwr13 = (xwht1 + xwht3) / 2; // center 13 |
485 | Float_t xwr23 = (xwht2 + xwht3) / 2; // center 23 | |
486 | Float_t dxw1 = xhit1 - xwr13; | |
487 | Float_t dxw2 = xhit2 - xwr23; | |
a3dfe79c | 488 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); |
489 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); | |
490 | Float_t egm3 = kCelWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); | |
fa412d9b | 491 | zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2; |
492 | zxe[1][0] = xwht1; | |
a3dfe79c | 493 | zxe[2][0] = eloss * egm1; |
fa412d9b | 494 | zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2; |
495 | zxe[1][1] = xwht2; | |
a3dfe79c | 496 | zxe[2][1] = eloss * egm2; |
fa412d9b | 497 | zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1; |
498 | zxe[1][2] = xwht3; | |
a3dfe79c | 499 | zxe[2][2] = eloss * egm3; |
fa412d9b | 500 | } |
501 | else { // incline 2-wire hit | |
502 | nIter = 2; | |
a3dfe79c | 503 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; |
504 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; | |
fa412d9b | 505 | Float_t xwr12 = (xwht1 + xwht2) / 2; |
506 | Float_t dxw1 = xhit1 - xwr12; | |
507 | Float_t dxw2 = xhit2 - xwr12; | |
508 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); | |
509 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); | |
510 | zxe[0][0] = (zhit1 + zhit2 - dZY*egm1) / 2; | |
511 | zxe[1][0] = xwht1; | |
a3dfe79c | 512 | zxe[2][0] = eloss * egm1; |
fa412d9b | 513 | zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2; |
514 | zxe[1][1] = xwht2; | |
a3dfe79c | 515 | zxe[2][1] = eloss * egm2; |
fa412d9b | 516 | } |
bea63bea | 517 | |
fa412d9b | 518 | // Finite size of ionization region |
519 | ||
fa7cce36 | 520 | Int_t nCellZ = GetGeometry()->GetNumberOfCPVPadsZ(); |
521 | Int_t nCellX = GetGeometry()->GetNumberOfCPVPadsPhi(); | |
a3dfe79c | 522 | Int_t nz3 = (kNgamz+1)/2; |
523 | Int_t nx3 = (kNgamx+1)/2; | |
524 | cpvDigits->Expand(nIter*kNgamx*kNgamz); | |
fa412d9b | 525 | TClonesArray &ldigits = *(TClonesArray *)cpvDigits; |
526 | ||
527 | for (Int_t iter=0; iter<nIter; iter++) { | |
528 | ||
529 | Float_t zhit = zxe[0][iter]; | |
530 | Float_t xhit = zxe[1][iter]; | |
531 | Float_t qhit = zxe[2][iter]; | |
fa7cce36 | 532 | Float_t zcell = zhit / GetGeometry()->GetPadSizeZ(); |
533 | Float_t xcell = xhit / GetGeometry()->GetPadSizePhi(); | |
fa412d9b | 534 | if ( zcell<=0 || xcell<=0 || |
535 | zcell>=nCellZ || xcell>=nCellX) return; | |
536 | Int_t izcell = (Int_t) zcell; | |
537 | Int_t ixcell = (Int_t) xcell; | |
538 | Float_t zc = zcell - izcell - 0.5; | |
539 | Float_t xc = xcell - ixcell - 0.5; | |
a3dfe79c | 540 | for (Int_t iz=1; iz<=kNgamz; iz++) { |
fa412d9b | 541 | Int_t kzg = izcell + iz - nz3; |
542 | if (kzg<=0 || kzg>nCellZ) continue; | |
543 | Float_t zg = (Float_t)(iz-nz3) - zc; | |
a3dfe79c | 544 | for (Int_t ix=1; ix<=kNgamx; ix++) { |
fa412d9b | 545 | Int_t kxg = ixcell + ix - nx3; |
546 | if (kxg<=0 || kxg>nCellX) continue; | |
547 | Float_t xg = (Float_t)(ix-nx3) - xc; | |
548 | ||
549 | // Now calculate pad response | |
550 | Float_t qpad = CPVPadResponseFunction(qhit,zg,xg); | |
a3dfe79c | 551 | qpad += kNoise*rnor2; |
fa412d9b | 552 | if (qpad<0) continue; |
553 | ||
554 | // Fill the array with pad response ID and amplitude | |
3d402178 | 555 | new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad); |
fa412d9b | 556 | } |
fa412d9b | 557 | } |
fa412d9b | 558 | } |
559 | } | |
560 | ||
561 | //____________________________________________________________________________ | |
562 | Float_t AliPHOSv1::CPVPadResponseFunction(Float_t qhit, Float_t zhit, Float_t xhit) { | |
563 | // ------------------------------------------------------------------------ | |
564 | // Calculate the amplitude in one CPV pad using the | |
565 | // cumulative pad response function | |
566 | // Author: Yuri Kharlov (after Serguei Sadovski) | |
567 | // 3 October 2000 | |
568 | // ------------------------------------------------------------------------ | |
569 | ||
fa7cce36 | 570 | Double_t dz = GetGeometry()->GetPadSizeZ() / 2; |
571 | Double_t dx = GetGeometry()->GetPadSizePhi() / 2; | |
572 | Double_t z = zhit * GetGeometry()->GetPadSizeZ(); | |
573 | Double_t x = xhit * GetGeometry()->GetPadSizePhi(); | |
fa412d9b | 574 | Double_t amplitude = qhit * |
575 | (CPVCumulPadResponse(z+dz,x+dx) - CPVCumulPadResponse(z+dz,x-dx) - | |
576 | CPVCumulPadResponse(z-dz,x+dx) + CPVCumulPadResponse(z-dz,x-dx)); | |
577 | return (Float_t)amplitude; | |
7587f5a5 | 578 | } |
579 | ||
fa412d9b | 580 | //____________________________________________________________________________ |
581 | Double_t AliPHOSv1::CPVCumulPadResponse(Double_t x, Double_t y) { | |
582 | // ------------------------------------------------------------------------ | |
583 | // Cumulative pad response function | |
584 | // It includes several terms from the CF decomposition in electrostatics | |
585 | // Note: this cumulative function is wrong since omits some terms | |
586 | // but the cell amplitude obtained with it is correct because | |
587 | // these omitting terms cancel | |
588 | // Author: Yuri Kharlov (after Serguei Sadovski) | |
589 | // 3 October 2000 | |
590 | // ------------------------------------------------------------------------ | |
591 | ||
a3dfe79c | 592 | const Double_t kA=1.0; |
593 | const Double_t kB=0.7; | |
fa412d9b | 594 | |
595 | Double_t r2 = x*x + y*y; | |
596 | Double_t xy = x*y; | |
597 | Double_t cumulPRF = 0; | |
598 | for (Int_t i=0; i<=4; i++) { | |
a3dfe79c | 599 | Double_t b1 = (2*i + 1) * kB; |
fa412d9b | 600 | cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) ); |
601 | } | |
a3dfe79c | 602 | cumulPRF *= kA/(2*TMath::Pi()); |
fa412d9b | 603 | return cumulPRF; |
604 | } | |
7eb9d12d | 605 |