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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 | } | |
7b7c1533 | 130 | |
5f20d3fb | 131 | } |
132 | ||
7587f5a5 | 133 | //____________________________________________________________________________ |
bea63bea | 134 | AliPHOSv1::~AliPHOSv1() |
b2a60966 | 135 | { |
bea63bea | 136 | // dtor |
5f20d3fb | 137 | |
ed4205d8 | 138 | if ( fHits) { |
139 | fHits->Delete() ; | |
140 | delete fHits ; | |
141 | fHits = 0 ; | |
8dfa469d | 142 | } |
7b7c1533 | 143 | if (fTreeQA) |
144 | delete fTreeQA ; | |
7587f5a5 | 145 | } |
146 | ||
7587f5a5 | 147 | //____________________________________________________________________________ |
b37750a6 | 148 | void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits) |
bea63bea | 149 | { |
150 | // Add a hit to the hit list. | |
5f20d3fb | 151 | // A PHOS hit is the sum of all hits in a single crystal |
152 | // or in a single PPSD gas cell | |
bea63bea | 153 | |
5f20d3fb | 154 | Int_t hitCounter ; |
bea63bea | 155 | AliPHOSHit *newHit ; |
5f20d3fb | 156 | AliPHOSHit *curHit ; |
157 | Bool_t deja = kFALSE ; | |
fa7cce36 | 158 | AliPHOSGeometry * geom = GetGeometry() ; |
bea63bea | 159 | |
b37750a6 | 160 | newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits) ; |
bea63bea | 161 | |
7854a24a | 162 | for ( hitCounter = fNhits-1 ; hitCounter >= 0 && !deja ; hitCounter-- ) { |
ed4205d8 | 163 | curHit = (AliPHOSHit*) (*fHits)[hitCounter] ; |
4e669ac8 | 164 | if(curHit->GetPrimary() != primary) break ; // We add hits with the same primary, while GEANT treats primaries succesively |
ed4205d8 | 165 | if( *curHit == *newHit ) { |
f15a01eb | 166 | *curHit + *newHit ; |
ed4205d8 | 167 | deja = kTRUE ; |
5f20d3fb | 168 | } |
169 | } | |
170 | ||
171 | if ( !deja ) { | |
ed4205d8 | 172 | new((*fHits)[fNhits]) AliPHOSHit(*newHit) ; |
7b326aac | 173 | // get the block Id number |
fa7cce36 | 174 | Int_t * relid = new Int_t[geom->GetNModules()] ; |
175 | geom->AbsToRelNumbering(Id, relid) ; | |
7b326aac | 176 | // and fill the relevant QA checkable (only if in PbW04) |
177 | if ( relid[1] == 0 ) { | |
178 | fQAHitsMul->Update(1) ; | |
179 | ((AliPHOSQAIntCheckable*)(*fQAHitsMulB)[relid[0]-1])->Update(1) ; | |
180 | } | |
181 | delete relid ; | |
ed4205d8 | 182 | fNhits++ ; |
5f20d3fb | 183 | } |
184 | ||
bea63bea | 185 | delete newHit; |
bea63bea | 186 | } |
187 | ||
7b326aac | 188 | //____________________________________________________________________________ |
189 | void AliPHOSv1::FinishPrimary() | |
190 | { | |
191 | // called at the end of each track (primary) by AliRun | |
192 | // hits are reset for each new track | |
193 | // accumulate the total hit-multiplicity | |
194 | // if ( fQAHitsMul ) | |
195 | // fQAHitsMul->Update( fHits->GetEntriesFast() ) ; | |
196 | ||
197 | } | |
198 | ||
199 | //____________________________________________________________________________ | |
200 | void AliPHOSv1::FinishEvent() | |
201 | { | |
202 | // called at the end of each event by AliRun | |
203 | // accumulate the hit-multiplicity and total energy per block | |
204 | // if the values have been updated check it | |
205 | ||
206 | if ( fQATotEner ) { | |
207 | if ( fQATotEner->HasChanged() ) { | |
208 | fQATotEner->CheckMe() ; | |
209 | fQATotEner->Reset() ; | |
210 | } | |
211 | } | |
212 | ||
213 | Int_t i ; | |
214 | if ( fQAHitsMulB && fQATotEnerB ) { | |
fa7cce36 | 215 | for (i = 0 ; i < GetGeometry()->GetNModules() ; i++) { |
7b326aac | 216 | AliPHOSQAIntCheckable * ci = (AliPHOSQAIntCheckable*)(*fQAHitsMulB)[i] ; |
217 | AliPHOSQAFloatCheckable* cf = (AliPHOSQAFloatCheckable*)(*fQATotEnerB)[i] ; | |
218 | if ( ci->HasChanged() ) { | |
219 | ci->CheckMe() ; | |
220 | ci->Reset() ; | |
221 | } | |
222 | if ( cf->HasChanged() ) { | |
223 | cf->CheckMe() ; | |
224 | cf->Reset() ; | |
225 | } | |
226 | } | |
227 | } | |
228 | ||
229 | // check the total multiplicity | |
230 | ||
231 | if ( fQAHitsMul ) { | |
232 | if ( fQAHitsMul->HasChanged() ) { | |
233 | fQAHitsMul->CheckMe() ; | |
234 | fQAHitsMul->Reset() ; | |
235 | } | |
236 | } | |
237 | } | |
238 | ||
5f20d3fb | 239 | //____________________________________________________________________________ |
7587f5a5 | 240 | void AliPHOSv1::StepManager(void) |
241 | { | |
7b7c1533 | 242 | |
b2a60966 | 243 | // Accumulates hits as long as the track stays in a single crystal or PPSD gas Cell |
b2a60966 | 244 | |
4f5bbbd4 | 245 | Int_t relid[4] ; // (box, layer, row, column) indices |
246 | Int_t absid ; // absolute cell ID number | |
2168f43b | 247 | Float_t xyze[4]={0,0,0,0} ; // position wrt MRS and energy deposited |
4f5bbbd4 | 248 | TLorentzVector pos ; // Lorentz vector of the track current position |
fa412d9b | 249 | Int_t copy ; |
7587f5a5 | 250 | |
bea63bea | 251 | Int_t tracknumber = gAlice->CurrentTrack() ; |
fa412d9b | 252 | Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() ); |
fa7cce36 | 253 | TString name = GetGeometry()->GetName() ; |
037cc66d | 254 | |
255 | ||
ed4205d8 | 256 | if ( name == "GPS2" || name == "MIXT" ) { // ======> CPV is a GPS' PPSD |
fa412d9b | 257 | |
dc999bc0 | 258 | if( gMC->CurrentVolID(copy) == gMC->VolId("PPCE") ) // We are inside a gas cell |
7587f5a5 | 259 | { |
260 | gMC->TrackPosition(pos) ; | |
261 | xyze[0] = pos[0] ; | |
262 | xyze[1] = pos[1] ; | |
263 | xyze[2] = pos[2] ; | |
bea63bea | 264 | xyze[3] = gMC->Edep() ; |
7587f5a5 | 265 | |
b37750a6 | 266 | if ( xyze[3] != 0 ) { // there is deposited energy |
7587f5a5 | 267 | gMC->CurrentVolOffID(5, relid[0]) ; // get the PHOS Module number |
fad3e5b9 | 268 | if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(5),"PHO1") == 0 ){ |
fa7cce36 | 269 | relid[0] += GetGeometry()->GetNModules() - GetGeometry()->GetNPPSDModules(); |
fad3e5b9 | 270 | } |
7587f5a5 | 271 | gMC->CurrentVolOffID(3, relid[1]) ; // get the Micromegas Module number |
fa7cce36 | 272 | // 1-> GetGeometry()->GetNumberOfModulesPhi() * GetGeometry()->GetNumberOfModulesZ() upper |
273 | // > GetGeometry()->GetNumberOfModulesPhi() * GetGeometry()->GetNumberOfModulesZ() lower | |
7587f5a5 | 274 | gMC->CurrentVolOffID(1, relid[2]) ; // get the row number of the cell |
275 | gMC->CurrentVolID(relid[3]) ; // get the column number | |
276 | ||
277 | // get the absolute Id number | |
278 | ||
fa7cce36 | 279 | GetGeometry()->RelToAbsNumbering(relid, absid) ; |
7587f5a5 | 280 | |
bea63bea | 281 | // add current hit to the hit list |
b37750a6 | 282 | AddHit(fIshunt, primary, tracknumber, absid, xyze); |
037cc66d | 283 | |
7587f5a5 | 284 | |
285 | } // there is deposited energy | |
fa412d9b | 286 | } // We are inside the gas of the CPV |
287 | } // GPS2 configuration | |
288 | ||
ed4205d8 | 289 | if ( name == "IHEP" || name == "MIXT" ) { // ======> CPV is a IHEP's one |
fa412d9b | 290 | |
291 | // Yuri Kharlov, 28 September 2000 | |
292 | ||
97cee223 | 293 | if( gMC->CurrentVolID(copy) == gMC->VolId("PCPQ") && |
b37750a6 | 294 | (gMC->IsTrackEntering() ) && |
037cc66d | 295 | gMC->TrackCharge() != 0) { |
fa412d9b | 296 | |
b37750a6 | 297 | gMC -> TrackPosition(pos); |
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 | ||
303 | Float_t xyd[3]={0,0,0} ; //local posiiton of the entering | |
304 | xyd[0] = xyzd[0]; | |
305 | xyd[1] =-xyzd[1]; | |
306 | xyd[2] =-xyzd[2]; | |
307 | ||
308 | ||
309 | // Current momentum of the hit's track in the local ref. system | |
310 | TLorentzVector pmom ; //momentum of the particle initiated hit | |
311 | gMC -> TrackMomentum(pmom); | |
312 | Float_t pm[3], pd[3]; | |
313 | for (i=0; i<3; i++) pm[i] = pmom[i]; | |
314 | gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system | |
315 | pmom[0] = pd[0]; | |
316 | pmom[1] =-pd[1]; | |
317 | pmom[2] =-pd[2]; | |
318 | ||
037cc66d | 319 | // Digitize the current CPV hit: |
320 | ||
321 | // 1. find pad response and | |
fa412d9b | 322 | |
a3dfe79c | 323 | Int_t moduleNumber; |
324 | gMC->CurrentVolOffID(3,moduleNumber); | |
325 | moduleNumber--; | |
fa412d9b | 326 | |
fa412d9b | 327 | |
3d402178 | 328 | TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit |
a3dfe79c | 329 | CPVDigitize(pmom,xyd,moduleNumber,cpvDigits); |
fa412d9b | 330 | |
331 | Float_t xmean = 0; | |
332 | Float_t zmean = 0; | |
333 | Float_t qsum = 0; | |
cd461ab8 | 334 | Int_t idigit,ndigits; |
fa412d9b | 335 | |
336 | // 2. go through the current digit list and sum digits in pads | |
337 | ||
338 | ndigits = cpvDigits->GetEntriesFast(); | |
cd461ab8 | 339 | for (idigit=0; idigit<ndigits-1; idigit++) { |
3d402178 | 340 | AliPHOSCPVDigit *cpvDigit1 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit); |
fa412d9b | 341 | Float_t x1 = cpvDigit1->GetXpad() ; |
342 | Float_t z1 = cpvDigit1->GetYpad() ; | |
343 | for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) { | |
3d402178 | 344 | AliPHOSCPVDigit *cpvDigit2 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(jdigit); |
fa412d9b | 345 | Float_t x2 = cpvDigit2->GetXpad() ; |
346 | Float_t z2 = cpvDigit2->GetYpad() ; | |
347 | if (x1==x2 && z1==z2) { | |
348 | Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ; | |
349 | cpvDigit2->SetQpad(qsum) ; | |
350 | cpvDigits->RemoveAt(idigit) ; | |
351 | } | |
352 | } | |
353 | } | |
354 | cpvDigits->Compress() ; | |
355 | ||
356 | // 3. add digits to temporary hit list fTmpHits | |
357 | ||
358 | ndigits = cpvDigits->GetEntriesFast(); | |
cd461ab8 | 359 | for (idigit=0; idigit<ndigits; idigit++) { |
3d402178 | 360 | AliPHOSCPVDigit *cpvDigit = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit); |
a3dfe79c | 361 | relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number |
fa412d9b | 362 | relid[1] =-1 ; // means CPV |
363 | relid[2] = cpvDigit->GetXpad() ; // column number of a pad | |
364 | relid[3] = cpvDigit->GetYpad() ; // row number of a pad | |
365 | ||
366 | // get the absolute Id number | |
fa7cce36 | 367 | GetGeometry()->RelToAbsNumbering(relid, absid) ; |
fa412d9b | 368 | |
369 | // add current digit to the temporary hit list | |
370 | xyze[0] = 0. ; | |
371 | xyze[1] = 0. ; | |
372 | xyze[2] = 0. ; | |
373 | xyze[3] = cpvDigit->GetQpad() ; // amplitude in a pad | |
374 | primary = -1; // No need in primary for CPV | |
b37750a6 | 375 | AddHit(fIshunt, primary, tracknumber, absid, xyze); |
fa412d9b | 376 | |
377 | if (cpvDigit->GetQpad() > 0.02) { | |
378 | xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5); | |
379 | zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5); | |
380 | qsum += cpvDigit->GetQpad(); | |
381 | } | |
382 | } | |
383 | delete cpvDigits; | |
384 | } | |
385 | } // end of IHEP configuration | |
7587f5a5 | 386 | |
037cc66d | 387 | |
fa412d9b | 388 | if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) { // We are inside a PBWO crystal |
389 | gMC->TrackPosition(pos) ; | |
390 | xyze[0] = pos[0] ; | |
391 | xyze[1] = pos[1] ; | |
392 | xyze[2] = pos[2] ; | |
393 | xyze[3] = gMC->Edep() ; | |
ed4205d8 | 394 | |
037cc66d | 395 | |
b37750a6 | 396 | if ( xyze[3] != 0 ) { // Track is inside the crystal and deposits some energy |
ed4205d8 | 397 | |
fa412d9b | 398 | gMC->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ; |
7b326aac | 399 | |
400 | // fill the relevant QA Checkables | |
401 | fQATotEner->Update( xyze[3] ) ; // total energy in PHOS | |
402 | ((AliPHOSQAFloatCheckable*)(*fQATotEnerB)[relid[0]-1])->Update( xyze[3] ) ; // energy in this block | |
037cc66d | 403 | |
fad3e5b9 | 404 | if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(10),"PHO1") == 0 ) |
fa7cce36 | 405 | relid[0] += GetGeometry()->GetNModules() - GetGeometry()->GetNPPSDModules(); |
fad3e5b9 | 406 | |
fa412d9b | 407 | relid[1] = 0 ; // means PBW04 |
408 | gMC->CurrentVolOffID(4, relid[2]) ; // get the row number inside the module | |
409 | gMC->CurrentVolOffID(3, relid[3]) ; // get the cell number inside the module | |
410 | ||
411 | // get the absolute Id number | |
fa7cce36 | 412 | GetGeometry()->RelToAbsNumbering(relid, absid) ; |
ed4205d8 | 413 | |
fa412d9b | 414 | // add current hit to the hit list |
b37750a6 | 415 | AddHit(fIshunt, primary,tracknumber, absid, xyze); |
037cc66d | 416 | |
ed4205d8 | 417 | |
fa412d9b | 418 | } // there is deposited energy |
419 | } // we are inside a PHOS Xtal | |
420 | } | |
421 | ||
422 | //____________________________________________________________________________ | |
423 | void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, Int_t moduleNumber, TClonesArray *cpvDigits) | |
424 | { | |
425 | // ------------------------------------------------------------------------ | |
426 | // Digitize one CPV hit: | |
427 | // On input take exact 4-momentum p and position zxhit of the hit, | |
428 | // find the pad response around this hit and | |
429 | // put the amplitudes in the pads into array digits | |
430 | // | |
431 | // Author: Yuri Kharlov (after Serguei Sadovsky) | |
432 | // 2 October 2000 | |
433 | // ------------------------------------------------------------------------ | |
434 | ||
fa7cce36 | 435 | const Float_t kCelWr = GetGeometry()->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad) |
a3dfe79c | 436 | const Float_t kDetR = 0.1; // Relative energy fluctuation in track for 100 e- |
437 | const Float_t kdEdx = 4.0; // Average energy loss in CPV; | |
438 | const Int_t kNgamz = 5; // Ionization size in Z | |
439 | const Int_t kNgamx = 9; // Ionization size in Phi | |
440 | const Float_t kNoise = 0.03; // charge noise in one pad | |
fa412d9b | 441 | |
442 | Float_t rnor1,rnor2; | |
443 | ||
444 | // Just a reminder on axes notation in the CPV module: | |
445 | // axis Z goes along the beam | |
446 | // axis X goes across the beam in the module plane | |
447 | // axis Y is a normal to the module plane showing from the IP | |
448 | ||
449 | Float_t hitX = zxhit[0]; | |
450 | Float_t hitZ =-zxhit[1]; | |
451 | Float_t pX = p.Px(); | |
452 | Float_t pZ =-p.Pz(); | |
453 | Float_t pNorm = p.Py(); | |
a3dfe79c | 454 | Float_t eloss = kdEdx; |
3d402178 | 455 | |
7b326aac | 456 | // cout << "CPVDigitize: YVK : "<<hitX<<" "<<hitZ<<" | "<<pX<<" "<<pZ<<" "<<pNorm<<endl; |
457 | ||
fa7cce36 | 458 | Float_t dZY = pZ/pNorm * GetGeometry()->GetCPVGasThickness(); |
459 | Float_t dXY = pX/pNorm * GetGeometry()->GetCPVGasThickness(); | |
fa412d9b | 460 | gRandom->Rannor(rnor1,rnor2); |
a3dfe79c | 461 | eloss *= (1 + kDetR*rnor1) * |
fa7cce36 | 462 | TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(GetGeometry()->GetCPVGasThickness(),2))); |
463 | Float_t zhit1 = hitZ + GetGeometry()->GetCPVActiveSize(1)/2 - dZY/2; | |
464 | Float_t xhit1 = hitX + GetGeometry()->GetCPVActiveSize(0)/2 - dXY/2; | |
fa412d9b | 465 | Float_t zhit2 = zhit1 + dZY; |
466 | Float_t xhit2 = xhit1 + dXY; | |
467 | ||
a3dfe79c | 468 | Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in" |
469 | Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out" | |
fa412d9b | 470 | |
471 | Int_t nIter; | |
472 | Float_t zxe[3][5]; | |
473 | if (iwht1==iwht2) { // incline 1-wire hit | |
474 | nIter = 2; | |
475 | zxe[0][0] = (zhit1 + zhit2 - dZY*0.57735) / 2; | |
a3dfe79c | 476 | zxe[1][0] = (iwht1 + 0.5) * kCelWr; |
477 | zxe[2][0] = eloss/2; | |
fa412d9b | 478 | zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2; |
a3dfe79c | 479 | zxe[1][1] = (iwht1 + 0.5) * kCelWr; |
480 | zxe[2][1] = eloss/2; | |
fa412d9b | 481 | } |
482 | else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit | |
483 | nIter = 3; | |
484 | Int_t iwht3 = (iwht1 + iwht2) / 2; | |
a3dfe79c | 485 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; // wire 1 |
486 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; // wire 2 | |
487 | Float_t xwht3 = (iwht3 + 0.5) * kCelWr; // wire 3 | |
fa412d9b | 488 | Float_t xwr13 = (xwht1 + xwht3) / 2; // center 13 |
489 | Float_t xwr23 = (xwht2 + xwht3) / 2; // center 23 | |
490 | Float_t dxw1 = xhit1 - xwr13; | |
491 | Float_t dxw2 = xhit2 - xwr23; | |
a3dfe79c | 492 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); |
493 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); | |
494 | Float_t egm3 = kCelWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); | |
fa412d9b | 495 | zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2; |
496 | zxe[1][0] = xwht1; | |
a3dfe79c | 497 | zxe[2][0] = eloss * egm1; |
fa412d9b | 498 | zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2; |
499 | zxe[1][1] = xwht2; | |
a3dfe79c | 500 | zxe[2][1] = eloss * egm2; |
fa412d9b | 501 | zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1; |
502 | zxe[1][2] = xwht3; | |
a3dfe79c | 503 | zxe[2][2] = eloss * egm3; |
fa412d9b | 504 | } |
505 | else { // incline 2-wire hit | |
506 | nIter = 2; | |
a3dfe79c | 507 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; |
508 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; | |
fa412d9b | 509 | Float_t xwr12 = (xwht1 + xwht2) / 2; |
510 | Float_t dxw1 = xhit1 - xwr12; | |
511 | Float_t dxw2 = xhit2 - xwr12; | |
512 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); | |
513 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); | |
514 | zxe[0][0] = (zhit1 + zhit2 - dZY*egm1) / 2; | |
515 | zxe[1][0] = xwht1; | |
a3dfe79c | 516 | zxe[2][0] = eloss * egm1; |
fa412d9b | 517 | zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2; |
518 | zxe[1][1] = xwht2; | |
a3dfe79c | 519 | zxe[2][1] = eloss * egm2; |
fa412d9b | 520 | } |
bea63bea | 521 | |
fa412d9b | 522 | // Finite size of ionization region |
523 | ||
fa7cce36 | 524 | Int_t nCellZ = GetGeometry()->GetNumberOfCPVPadsZ(); |
525 | Int_t nCellX = GetGeometry()->GetNumberOfCPVPadsPhi(); | |
a3dfe79c | 526 | Int_t nz3 = (kNgamz+1)/2; |
527 | Int_t nx3 = (kNgamx+1)/2; | |
528 | cpvDigits->Expand(nIter*kNgamx*kNgamz); | |
fa412d9b | 529 | TClonesArray &ldigits = *(TClonesArray *)cpvDigits; |
530 | ||
531 | for (Int_t iter=0; iter<nIter; iter++) { | |
532 | ||
533 | Float_t zhit = zxe[0][iter]; | |
534 | Float_t xhit = zxe[1][iter]; | |
535 | Float_t qhit = zxe[2][iter]; | |
fa7cce36 | 536 | Float_t zcell = zhit / GetGeometry()->GetPadSizeZ(); |
537 | Float_t xcell = xhit / GetGeometry()->GetPadSizePhi(); | |
fa412d9b | 538 | if ( zcell<=0 || xcell<=0 || |
539 | zcell>=nCellZ || xcell>=nCellX) return; | |
540 | Int_t izcell = (Int_t) zcell; | |
541 | Int_t ixcell = (Int_t) xcell; | |
542 | Float_t zc = zcell - izcell - 0.5; | |
543 | Float_t xc = xcell - ixcell - 0.5; | |
a3dfe79c | 544 | for (Int_t iz=1; iz<=kNgamz; iz++) { |
fa412d9b | 545 | Int_t kzg = izcell + iz - nz3; |
546 | if (kzg<=0 || kzg>nCellZ) continue; | |
547 | Float_t zg = (Float_t)(iz-nz3) - zc; | |
a3dfe79c | 548 | for (Int_t ix=1; ix<=kNgamx; ix++) { |
fa412d9b | 549 | Int_t kxg = ixcell + ix - nx3; |
550 | if (kxg<=0 || kxg>nCellX) continue; | |
551 | Float_t xg = (Float_t)(ix-nx3) - xc; | |
552 | ||
553 | // Now calculate pad response | |
554 | Float_t qpad = CPVPadResponseFunction(qhit,zg,xg); | |
a3dfe79c | 555 | qpad += kNoise*rnor2; |
fa412d9b | 556 | if (qpad<0) continue; |
557 | ||
558 | // Fill the array with pad response ID and amplitude | |
3d402178 | 559 | new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad); |
fa412d9b | 560 | } |
fa412d9b | 561 | } |
fa412d9b | 562 | } |
563 | } | |
564 | ||
565 | //____________________________________________________________________________ | |
566 | Float_t AliPHOSv1::CPVPadResponseFunction(Float_t qhit, Float_t zhit, Float_t xhit) { | |
567 | // ------------------------------------------------------------------------ | |
568 | // Calculate the amplitude in one CPV pad using the | |
569 | // cumulative pad response function | |
570 | // Author: Yuri Kharlov (after Serguei Sadovski) | |
571 | // 3 October 2000 | |
572 | // ------------------------------------------------------------------------ | |
573 | ||
fa7cce36 | 574 | Double_t dz = GetGeometry()->GetPadSizeZ() / 2; |
575 | Double_t dx = GetGeometry()->GetPadSizePhi() / 2; | |
576 | Double_t z = zhit * GetGeometry()->GetPadSizeZ(); | |
577 | Double_t x = xhit * GetGeometry()->GetPadSizePhi(); | |
fa412d9b | 578 | Double_t amplitude = qhit * |
579 | (CPVCumulPadResponse(z+dz,x+dx) - CPVCumulPadResponse(z+dz,x-dx) - | |
580 | CPVCumulPadResponse(z-dz,x+dx) + CPVCumulPadResponse(z-dz,x-dx)); | |
581 | return (Float_t)amplitude; | |
7587f5a5 | 582 | } |
583 | ||
fa412d9b | 584 | //____________________________________________________________________________ |
585 | Double_t AliPHOSv1::CPVCumulPadResponse(Double_t x, Double_t y) { | |
586 | // ------------------------------------------------------------------------ | |
587 | // Cumulative pad response function | |
588 | // It includes several terms from the CF decomposition in electrostatics | |
589 | // Note: this cumulative function is wrong since omits some terms | |
590 | // but the cell amplitude obtained with it is correct because | |
591 | // these omitting terms cancel | |
592 | // Author: Yuri Kharlov (after Serguei Sadovski) | |
593 | // 3 October 2000 | |
594 | // ------------------------------------------------------------------------ | |
595 | ||
a3dfe79c | 596 | const Double_t kA=1.0; |
597 | const Double_t kB=0.7; | |
fa412d9b | 598 | |
599 | Double_t r2 = x*x + y*y; | |
600 | Double_t xy = x*y; | |
601 | Double_t cumulPRF = 0; | |
602 | for (Int_t i=0; i<=4; i++) { | |
a3dfe79c | 603 | Double_t b1 = (2*i + 1) * kB; |
fa412d9b | 604 | cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) ); |
605 | } | |
a3dfe79c | 606 | cumulPRF *= kA/(2*TMath::Pi()); |
fa412d9b | 607 | return cumulPRF; |
608 | } | |
7eb9d12d | 609 |