1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 *
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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 **************************************************************************/
18 // Class AliMUONSt1GeometryBuilder
19 // -------------------------------
20 // MUON Station1 coarse geometry construction class.
21 // Extracted from AliMUONv1
22 // by Ivana Hrivnacova, IPN Orsay
23 // Included in AliRoot 2004/01/23
25 #include <TVirtualMC.h>
26 #include <TGeoMatrix.h>
30 #include "AliMUONSt1GeometryBuilder.h"
32 #include "AliMUONChamber.h"
33 #include "AliMUONGeometryModule.h"
34 #include "AliMUONGeometryEnvelopeStore.h"
36 ClassImp(AliMUONSt1GeometryBuilder)
38 //______________________________________________________________________________
39 AliMUONSt1GeometryBuilder::AliMUONSt1GeometryBuilder(AliMUON* muon)
40 : AliMUONVGeometryBuilder("st1.dat",
41 muon->Chamber(0).GetGeometry(),
42 muon->Chamber(1).GetGeometry()),
45 // Standard constructor
49 //______________________________________________________________________________
50 AliMUONSt1GeometryBuilder::AliMUONSt1GeometryBuilder()
51 : AliMUONVGeometryBuilder(),
54 // Default constructor
58 //______________________________________________________________________________
59 AliMUONSt1GeometryBuilder::AliMUONSt1GeometryBuilder(const AliMUONSt1GeometryBuilder& rhs)
60 : AliMUONVGeometryBuilder(rhs)
62 // Protected copy constructor
64 AliFatal("Copy constructor is not implemented.");
67 //______________________________________________________________________________
68 AliMUONSt1GeometryBuilder::~AliMUONSt1GeometryBuilder() {
72 //______________________________________________________________________________
73 AliMUONSt1GeometryBuilder&
74 AliMUONSt1GeometryBuilder::operator = (const AliMUONSt1GeometryBuilder& rhs)
76 // Protected assignement operator
78 // check assignement to self
79 if (this == &rhs) return *this;
81 AliFatal("Assignment operator is not implemented.");
90 //______________________________________________________________________________
91 void AliMUONSt1GeometryBuilder::CreateGeometry()
93 // From AliMUONv1::CreateGeometry()
96 //********************************************************************
98 //********************************************************************
100 // indices 1 and 2 for first and second chambers in the station
101 // iChamber (first chamber) kept for other quanties than Z,
102 // assumed to be the same in both chambers
104 // Get tracking medias Ids
105 Int_t *idtmed = fMUON->GetIdtmed()->GetArray()-1099;
106 Int_t idAir= idtmed[1100]; // medium 1
107 Int_t idAlu1=idtmed[1103]; // medium 4
108 Int_t idAlu2=idtmed[1104]; // medium 5
109 Int_t idGas=idtmed[1108]; // medium 9 = Ar-CO2 gas (80%+20%)
110 Bool_t frameCrosses=kTRUE;
112 // Rotation matrices in the x-y plane
115 fMUON->AliMatrix(irot1, 90., 0., 90., 90., 0., 0.);
118 fMUON->AliMatrix(irot2, 90., 90., 90., 180., 0., 0.);
120 AliMUONChamber* iChamber1 = &fMUON->Chamber(0);
121 AliMUONChamber* iChamber2 = &fMUON->Chamber(1);
122 AliMUONChamber* iChamber = iChamber1;
124 // DGas decreased from standard one (0.5)
125 iChamber->SetDGas(0.4);
126 iChamber2->SetDGas(0.4);
128 // DAlu increased from standard one (3% of X0),
129 // because more electronics with smaller pads
130 iChamber->SetDAlu(3.5 * 8.9 / 100.);
131 iChamber2->SetDAlu(3.5 * 8.9 / 100.);
133 // Half of the total thickness of frame crosses (including DAlu)
134 // for each chamber in stations 1 and 2:
135 // 3% of X0 of composite material,
136 // but taken as Aluminium here, with same thickness in number of X0
137 Float_t dframez = 3. * 8.9 / 100;
138 Float_t zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
139 // The same parameters are defined in builder for station 2
142 // Outer excess and inner recess for mother volume radius
143 // with respect to ROuter and RInner
144 Float_t dframep=.001; // Value for station 3 should be 6 ...
145 // Width (RdPhi) of the frame crosses for stations 1 and 2 (cm)
146 // Float_t dframep1=.001;
147 Float_t dframep1 = 11.0;
148 Float_t phi=2*TMath::Pi()/12/2;
149 // The same parameters are defined in builder for station 2
152 Float_t dstation = (-iChamber2->Z()) - (-iChamber1->Z());
153 tpar[0] = iChamber->RInner()-dframep;
154 tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
155 tpar[2] = dstation/5;
157 gMC->Gsvolu("S01M", "TUBE", idAir, tpar, 3);
158 gMC->Gsvolu("S02M", "TUBE", idAir, tpar, 3);
161 //gMC->Gspos("S01M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
162 //gMC->Gspos("S02M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
164 GetEnvelopes(0)->AddEnvelope("S01M", 100, false);
165 GetEnvelopes(1)->AddEnvelope("S02M", 200, false);
168 // // Aluminium frames
170 // pgpar[0] = 360/12/2;
174 // pgpar[4] = -dframez/2;
175 // pgpar[5] = iChamber->ROuter();
176 // pgpar[6] = pgpar[5]+dframep1;
177 // pgpar[7] = +dframez/2;
178 // pgpar[8] = pgpar[5];
179 // pgpar[9] = pgpar[6];
180 // gMC->Gsvolu("S01O", "PGON", idAlu1, pgpar, 10);
181 // gMC->Gsvolu("S02O", "PGON", idAlu1, pgpar, 10);
182 // gMC->Gspos("S01O",1,"S01M", 0.,0.,-zfpos, 0,"ONLY");
183 // gMC->Gspos("S01O",2,"S01M", 0.,0.,+zfpos, 0,"ONLY");
184 // gMC->Gspos("S02O",1,"S02M", 0.,0.,-zfpos, 0,"ONLY");
185 // gMC->Gspos("S02O",2,"S02M", 0.,0.,+zfpos, 0,"ONLY");
188 // tpar[0]= iChamber->RInner()-dframep1;
189 // tpar[1]= iChamber->RInner();
190 // tpar[2]= dframez/2;
191 // gMC->Gsvolu("S01I", "TUBE", idAlu1, tpar, 3);
192 // gMC->Gsvolu("S02I", "TUBE", idAlu1, tpar, 3);
194 // gMC->Gspos("S01I",1,"S01M", 0.,0.,-zfpos, 0,"ONLY");
195 // gMC->Gspos("S01I",2,"S01M", 0.,0.,+zfpos, 0,"ONLY");
196 // gMC->Gspos("S02I",1,"S02M", 0.,0.,-zfpos, 0,"ONLY");
197 // gMC->Gspos("S02I",2,"S02M", 0.,0.,+zfpos, 0,"ONLY");
202 // security for inside mother volume
204 bpar[0] = (iChamber->ROuter() - iChamber->RInner())
205 * TMath::Cos(TMath::ASin(dframep1 /
206 (iChamber->ROuter() - iChamber->RInner())))
208 bpar[1] = dframep1/2;
209 // total thickness will be (4 * bpar[2]) for each chamber,
210 // which has to be equal to (2 * dframez) - DAlu
211 bpar[2] = (2.0 * dframez - iChamber->DAlu()) / 4.0;
212 gMC->Gsvolu("S01B", "BOX", idAlu1, bpar, 3);
213 gMC->Gsvolu("S02B", "BOX", idAlu1, bpar, 3);
215 gMC->Gspos("S01B",1,"S01M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
217 gMC->Gspos("S01B",2,"S01M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
219 gMC->Gspos("S01B",3,"S01M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
221 gMC->Gspos("S01B",4,"S01M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
223 gMC->Gspos("S01B",5,"S01M", +iChamber->RInner()+bpar[0] , 0,+zfpos,
225 gMC->Gspos("S01B",6,"S01M", -iChamber->RInner()-bpar[0] , 0,+zfpos,
227 gMC->Gspos("S01B",7,"S01M", 0, +iChamber->RInner()+bpar[0] ,+zfpos,
229 gMC->Gspos("S01B",8,"S01M", 0, -iChamber->RInner()-bpar[0] ,+zfpos,
232 gMC->Gspos("S02B",1,"S02M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
234 gMC->Gspos("S02B",2,"S02M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
236 gMC->Gspos("S02B",3,"S02M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
238 gMC->Gspos("S02B",4,"S02M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
240 gMC->Gspos("S02B",5,"S02M", +iChamber->RInner()+bpar[0] , 0,+zfpos,
242 gMC->Gspos("S02B",6,"S02M", -iChamber->RInner()-bpar[0] , 0,+zfpos,
244 gMC->Gspos("S02B",7,"S02M", 0, +iChamber->RInner()+bpar[0] ,+zfpos,
246 gMC->Gspos("S02B",8,"S02M", 0, -iChamber->RInner()-bpar[0] ,+zfpos,
250 // Chamber Material represented by Alu sheet
251 tpar[0]= iChamber->RInner();
252 tpar[1]= iChamber->ROuter();
253 tpar[2] = (iChamber->DGas()+iChamber->DAlu())/2;
254 gMC->Gsvolu("S01A", "TUBE", idAlu2, tpar, 3);
255 gMC->Gsvolu("S02A", "TUBE",idAlu2, tpar, 3);
256 gMC->Gspos("S01A", 1, "S01M", 0., 0., 0., 0, "ONLY");
257 gMC->Gspos("S02A", 1, "S02M", 0., 0., 0., 0, "ONLY");
260 // tpar[2] = iChamber->DGas();
261 tpar[2] = iChamber->DGas()/2;
262 gMC->Gsvolu("S01G", "TUBE", idGas, tpar, 3);
263 gMC->Gsvolu("S02G", "TUBE", idGas, tpar, 3);
264 gMC->Gspos("S01G", 1, "S01A", 0., 0., 0., 0, "ONLY");
265 gMC->Gspos("S02G", 1, "S02A", 0., 0., 0., 0, "ONLY");
267 // Frame Crosses to be placed inside gas
268 // NONE: chambers are sensitive everywhere
269 // if (frameCrosses) {
271 // dr = (iChamber->ROuter() - iChamber->RInner());
272 // bpar[0] = TMath::Sqrt(dr*dr-dframep1*dframep1/4)/2;
273 // bpar[1] = dframep1/2;
274 // bpar[2] = iChamber->DGas()/2;
275 // gMC->Gsvolu("S01F", "BOX", idAlu1, bpar, 3);
276 // gMC->Gsvolu("S02F", "BOX", idAlu1, bpar, 3);
278 // gMC->Gspos("S01F",1,"S01G", +iChamber->RInner()+bpar[0] , 0, 0,
280 // gMC->Gspos("S01F",2,"S01G", -iChamber->RInner()-bpar[0] , 0, 0,
282 // gMC->Gspos("S01F",3,"S01G", 0, +iChamber->RInner()+bpar[0] , 0,
284 // gMC->Gspos("S01F",4,"S01G", 0, -iChamber->RInner()-bpar[0] , 0,
287 // gMC->Gspos("S02F",1,"S02G", +iChamber->RInner()+bpar[0] , 0, 0,
289 // gMC->Gspos("S02F",2,"S02G", -iChamber->RInner()-bpar[0] , 0, 0,
291 // gMC->Gspos("S02F",3,"S02G", 0, +iChamber->RInner()+bpar[0] , 0,
293 // gMC->Gspos("S02F",4,"S02G", 0, -iChamber->RInner()-bpar[0] , 0,
298 //______________________________________________________________________________
299 void AliMUONSt1GeometryBuilder::SetTransformations()
301 // Defines the transformations for the station2 chambers.
304 AliMUONChamber* iChamber1 = &fMUON->Chamber(0);
305 Double_t zpos1= - iChamber1->Z();
306 iChamber1->GetGeometry()
307 ->SetTranslation(TGeoTranslation(0., 0., zpos1));
309 AliMUONChamber* iChamber2 = &fMUON->Chamber(1);
310 Double_t zpos2 = - iChamber2->Z();
311 iChamber2->GetGeometry()
312 ->SetTranslation(TGeoTranslation(0., 0., zpos2));
315 //______________________________________________________________________________
316 void AliMUONSt1GeometryBuilder::SetSensitiveVolumes()
318 // Defines the sensitive volumes for station1 chambers.
321 GetGeometry(0)->SetSensitiveVolume("S01G");
322 GetGeometry(1)->SetSensitiveVolume("S02G");