2 /**************************************************************************
3 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * Author: The ALICE Off-line Project. *
6 * Contributors are mentioned in the code where appropriate. *
8 * Permission to use, copy, modify and distribute this software and its *
9 * documentation strictly for non-commercial purposes is hereby granted *
10 * without fee, provided that the above copyright notice appears in all *
11 * copies and that both the copyright notice and this permission notice *
12 * appear in the supporting documentation. The authors make no claims *
13 * about the suitability of this software for any purpose. It is *
14 * provided "as is" without express or implied warranty. *
15 **************************************************************************/
19 //_________________________________________________________________________
20 // Base Class for PHOS description:
21 // PHOS consists of a PbWO4 calorimeter (EMCA) and a gazeous charged
22 // particles detector (CPV or PPSD).
23 // The only provided method here is CreateMaterials,
24 // which defines the materials common to all PHOS versions.
26 //*-- Author: Laurent Aphecetche & Yves Schutz (SUBATECH)
27 //////////////////////////////////////////////////////////////////////////////
29 // --- ROOT system ---
32 // --- Standard library ---
34 // --- AliRoot header files ---
43 //____________________________________________________________________________
44 AliPHOS::AliPHOS():AliDetector()
47 //We do not create objects, because these pointers will be overwritten durin reading from file.
56 //____________________________________________________________________________
57 AliPHOS::AliPHOS(const char* name, const char* title): AliDetector(name,title)
69 //____________________________________________________________________________
74 fEmcRecPoints->Delete() ;
75 delete fEmcRecPoints ;
77 fPpsdRecPoints->Delete() ;
78 delete fPpsdRecPoints ;
80 fCpvRecPoints->Delete() ;
81 delete fCpvRecPoints ;
83 fTrackSegments->Delete() ;
84 delete fTrackSegments ;
86 fRecParticles->Delete() ;
87 delete fRecParticles ;
92 //____________________________________________________________________________
93 void AliPHOS::CreateMaterials()
95 // Definitions of materials to build PHOS and associated tracking media.
96 // media number in idtmed are 699 to 798.
98 // --- The PbWO4 crystals ---
99 Float_t aX[3] = {207.19, 183.85, 16.0} ;
100 Float_t zX[3] = {82.0, 74.0, 8.0} ;
101 Float_t wX[3] = {1.0, 1.0, 4.0} ;
104 AliMixture(0, "PbWO4$", aX, zX, dX, -3, wX) ;
107 // --- The polysterene scintillator (CH) ---
108 Float_t aP[2] = {12.011, 1.00794} ;
109 Float_t zP[2] = {6.0, 1.0} ;
110 Float_t wP[2] = {1.0, 1.0} ;
113 AliMixture(1, "Polystyrene$", aP, zP, dP, -2, wP) ;
116 AliMaterial(2, "Al$", 26.98, 13., 2.7, 8.9, 999., 0, 0) ;
117 // --- Absorption length is ignored ^
119 // --- Tyvek (CnH2n) ---
120 Float_t aT[2] = {12.011, 1.00794} ;
121 Float_t zT[2] = {6.0, 1.0} ;
122 Float_t wT[2] = {1.0, 2.0} ;
125 AliMixture(3, "Tyvek$", aT, zT, dT, -2, wT) ;
127 // --- Polystyrene foam ---
128 Float_t aF[2] = {12.011, 1.00794} ;
129 Float_t zF[2] = {6.0, 1.0} ;
130 Float_t wF[2] = {1.0, 1.0} ;
133 AliMixture(4, "Foam$", aF, zF, dF, -2, wF) ;
136 Float_t aTIT[3] = {47.88, 26.98, 54.94} ;
137 Float_t zTIT[3] = {22.0, 13.0, 25.0} ;
138 Float_t wTIT[3] = {69.0, 6.0, 1.0} ;
141 AliMixture(5, "Titanium$", aTIT, zTIT, dTIT, -3, wTIT);
144 AliMaterial(6, "Si$", 28.0855, 14., 2.33, 9.36, 42.3, 0, 0) ;
148 // --- Foam thermo insulation ---
149 Float_t aTI[2] = {12.011, 1.00794} ;
150 Float_t zTI[2] = {6.0, 1.0} ;
151 Float_t wTI[2] = {1.0, 1.0} ;
154 AliMixture(7, "Thermo Insul.$", aTI, zTI, dTI, -2, wTI) ;
157 Float_t aTX[4] = {16.0, 28.09, 12.011, 1.00794} ;
158 Float_t zTX[4] = {8.0, 14.0, 6.0, 1.0} ;
159 Float_t wTX[4] = {292.0, 68.0, 462.0, 736.0} ;
162 AliMixture(8, "Textolit$", aTX, zTX, dTX, -4, wTX) ;
165 Float_t aFR[3] = {28.0855, 15.9994, 17.749} ;
166 Float_t zFR[3] = {14., 8., 8.875} ;
167 Float_t wFR[3] = {.28, .32, .4} ;
170 AliMixture(9, "FR4$", aFR, zFR, dFR, -3, wFR) ;
172 // --- The Composite Material for micromegas (so far polyetylene) ---
173 Float_t aCM[2] = {12.01, 1.} ;
174 Float_t zCM[2] = {6., 1.} ;
175 Float_t wCM[2] = {1., 2.} ;
176 Float_t dCM = 0.935 ;
178 AliMixture(10, "Compo Mat$", aCM, zCM, dCM, -2, wCM) ;
181 AliMaterial(11, "Cu$", 63.546, 29, 8.96, 1.43, 14.8, 0, 0) ;
183 // --- G10 : Printed Circuit material ---
184 Float_t aG10[4] = { 12., 1., 16., 28.} ;
185 Float_t zG10[4] = { 6., 1., 8., 14.} ;
186 Float_t wG10[4] = { .259, .288, .248, .205} ;
189 AliMixture(12, "G10$", aG10, zG10, dG10, -4, wG10);
192 AliMaterial(13, "Pb$", 207.2, 82, 11.35, 0.56, 0., 0, 0) ;
194 // --- The gas mixture ---
196 Float_t aCO[2] = {12.0, 16.0} ;
197 Float_t zCO[2] = {6.0, 8.0} ;
198 Float_t wCO[2] = {1.0, 2.0} ;
199 Float_t dCO = 0.001977 ;
201 AliMixture(14, "CO2$", aCO, zCO, dCO, -2, wCO);
204 Float_t dAr = 0.001782 ;
205 AliMaterial(15, "Ar$", 39.948, 18.0, dAr, 14.0, 0., 0, 0) ;
214 Float_t absL, radL, density ;
218 gMC->Gfmate((*fIdmate)[15], namate, aGM[0], zGM[0], density, radL, absL, buf, nbuf) ; // Get properties of Ar
219 gMC->Gfmate((*fIdmate)[14], namate, aGM[1], zGM[1], density, radL, absL, buf, nbuf) ; // Get properties of CO2
222 // Create gas mixture
224 Float_t arContent = 0.80 ; // Ar-content of the Ar/CO2-mixture (80% / 20%)
227 wGM[1] = 1. - arContent ;
228 dGM = wGM[0] * dAr + wGM[1] * dCO;
230 AliMixture(16, "ArCO2$", aGM, zGM, dGM, 2, wGM) ;
232 // --- Stainless steel (let it be pure iron) ---
233 AliMaterial(17, "Steel$", 55.845, 26, 7.87, 1.76, 0., 0, 0) ;
236 AliMaterial(99, "Air$", 14.61, 7.3, 0.001205, 30420., 67500., 0, 0) ;
239 // DEFINITION OF THE TRACKING MEDIA
241 // for PHOS: idtmed[699->798] equivalent to fIdtmed[0->100]
242 Int_t * idtmed = fIdtmed->GetArray() - 699 ;
243 Int_t isxfld = gAlice->Field()->Integ() ;
244 Float_t sxmgmx = gAlice->Field()->Max() ;
246 // The scintillator of the calorimeter made of PBW04 -> idtmed[699]
247 AliMedium(0, "PHOS Xtal $", 0, 1,
248 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
250 // The scintillator of the CPV made of Polystyrene scintillator -> idtmed[700]
251 AliMedium(1, "CPV scint. $", 1, 1,
252 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
254 // Various Aluminium parts made of Al -> idtmed[701]
255 AliMedium(2, "Al parts $", 2, 0,
256 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ;
258 // The Tywek which wraps the calorimeter crystals -> idtmed[702]
259 AliMedium(3, "Tyvek wrapper$", 3, 0,
260 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ;
262 // The Polystyrene foam around the calorimeter module -> idtmed[703]
263 AliMedium(4, "Polyst. foam $", 4, 0,
264 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
266 // The Titanium around the calorimeter crystal -> idtmed[704]
267 AliMedium(5, "Titan. cover $", 5, 0,
268 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.0001, 0.0001, 0, 0) ;
270 // The Silicon of the pin diode to read out the calorimeter crystal -> idtmed[705]
271 AliMedium(6, "Si PIN $", 6, 0,
272 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.01, 0.01, 0, 0) ;
274 // The thermo insulating material of the box which contains the calorimeter module -> idtmed[706]
275 AliMedium(7, "Thermo Insul.$", 7, 0,
276 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
278 // The Textolit which makes up the box which contains the calorimeter module -> idtmed[707]
279 AliMedium(8, "Textolit $", 8, 0,
280 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
282 // FR4: The Plastic which makes up the frame of micromegas -> idtmed[708]
283 AliMedium(9, "FR4 $", 9, 0,
284 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.0001, 0, 0) ;
287 // The Composite Material for micromegas -> idtmed[709]
288 AliMedium(10, "CompoMat $", 10, 0,
289 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
291 // Copper -> idtmed[710]
292 AliMedium(11, "Copper $", 11, 0,
293 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.0001, 0, 0) ;
295 // G10: Printed Circuit material -> idtmed[711]
297 AliMedium(12, "G10 $", 12, 0,
298 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.01, 0, 0) ;
300 // The Lead -> idtmed[712]
302 AliMedium(13, "Lead $", 13, 0,
303 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
305 // The gas mixture: ArCo2 -> idtmed[715]
307 AliMedium(16, "ArCo2 $", 16, 1,
308 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.01, 0, 0) ;
310 // Stainless steel -> idtmed[716]
311 AliMedium(17, "Steel $", 17, 0,
312 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.0001, 0, 0) ;
314 // Air -> idtmed[798]
315 AliMedium(99, "Air $", 99, 0,
316 isxfld, sxmgmx, 10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
318 // --- Set decent energy thresholds for gamma and electron tracking
320 // Tracking threshold for photons and electrons in the scintillator crystal
321 gMC->Gstpar(idtmed[699], "CUTGAM",0.5E-4) ;
322 gMC->Gstpar(idtmed[699], "CUTELE",1.0E-4) ;
324 // --- Generate explicitly delta rays in the titan cover ---
325 gMC->Gstpar(idtmed[704], "LOSS",3.) ;
326 gMC->Gstpar(idtmed[704], "DRAY",1.) ;
327 // --- and in aluminium parts ---
328 gMC->Gstpar(idtmed[701], "LOSS",3.) ;
329 gMC->Gstpar(idtmed[701], "DRAY",1.) ;
330 // --- and in PIN diode
331 gMC->Gstpar(idtmed[705], "LOSS",3) ;
332 gMC->Gstpar(idtmed[705], "DRAY",1) ;
333 // --- and in the passive convertor
334 gMC->Gstpar(idtmed[712], "LOSS",3) ;
335 gMC->Gstpar(idtmed[712], "DRAY",1) ;
336 // Tracking threshold for photons and electrons in the gas ArC02
337 gMC->Gstpar(idtmed[715], "CUTGAM",1.E-5) ;
338 gMC->Gstpar(idtmed[715], "CUTELE",1.E-5) ;
339 gMC->Gstpar(idtmed[715], "CUTNEU",1.E-5) ;
340 gMC->Gstpar(idtmed[715], "CUTHAD",1.E-5) ;
341 gMC->Gstpar(idtmed[715], "CUTMUO",1.E-5) ;
342 gMC->Gstpar(idtmed[715], "BCUTE",1.E-5) ;
343 gMC->Gstpar(idtmed[715], "BCUTM",1.E-5) ;
344 gMC->Gstpar(idtmed[715], "DCUTE",1.E-5) ;
345 gMC->Gstpar(idtmed[715], "DCUTM",1.E-5) ;
346 gMC->Gstpar(idtmed[715], "PPCUTM",1.E-5) ;
347 gMC->Gstpar(idtmed[715], "LOSS",2.) ;
348 gMC->Gstpar(idtmed[715], "DRAY",0.) ;
349 gMC->Gstpar(idtmed[715], "STRA",2.) ;
352 //____________________________________________________________________________
353 void AliPHOS::SetTreeAddress()
356 AliDetector::SetTreeAddress();
363 fDigits = new TClonesArray("AliPHOSDigit",1) ;
365 if (gAlice->TreeD() && fDigits ) {
366 branch = gAlice->TreeD()->GetBranch("PHOS");
367 if (branch) branch->SetAddress(&fDigits) ;
370 TTree *treeR = gAlice->TreeR();
372 //Branch address for TreeR: EmcRecPoint
375 fEmcRecPoints->Delete();
377 fEmcRecPoints = new AliPHOSRecPoint::RecPointsList(1) ;
379 if ( treeR && fEmcRecPoints ) {
380 branch = treeR->GetBranch("PHOSEmcRP");
381 if (branch) branch->SetAddress(&fEmcRecPoints) ;
384 //Branch address for TreeR: PPSDRecPoint
386 fPpsdRecPoints->Delete();
388 fPpsdRecPoints = new AliPHOSRecPoint::RecPointsList(1) ;
390 if ( treeR && fPpsdRecPoints ) {
391 branch = treeR->GetBranch("PHOSPpsdRP");
392 if (branch) branch->SetAddress(&fPpsdRecPoints) ;
395 //Branch address for TreeR: CPVRecPoint
397 fCpvRecPoints->Delete();
399 fCpvRecPoints = new AliPHOSRecPoint::RecPointsList(1) ;
401 if ( treeR && fCpvRecPoints ) {
402 branch = treeR->GetBranch("PHOSCpvRP");
403 if (branch) branch->SetAddress(&fCpvRecPoints) ;
406 //Branch address for TreeR: TrackSegments
408 fTrackSegments->Clear() ;
410 fTrackSegments = new AliPHOSTrackSegment::TrackSegmentsList("AliPHOSTrackSegment", 1) ;
412 if ( treeR && fTrackSegments ) {
413 branch = treeR->GetBranch("PHOSTS");
414 if (branch) branch->SetAddress(&fTrackSegments) ;
417 //Branch address for TreeR: RecParticles
419 fRecParticles->Clear() ;
421 fRecParticles = new AliPHOSRecParticle::RecParticlesList("AliPHOSRecParticle", 1) ;
423 if ( treeR && fRecParticles ) {
424 branch = treeR->GetBranch("PHOSRP");
425 if (branch) branch->SetAddress(&fRecParticles) ;