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 *
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 **************************************************************************/
18 // Class AliMUONSt2GeometryBuilder
19 // -------------------------------
20 // MUON Station2 coarse geometry construction class.
21 // Extracted from AliMUONv1
22 // Dummy version of station 2 with the right DE id (Ch. Finck)
24 #include <TVirtualMC.h>
25 #include <TGeoMatrix.h>
29 #include "AliMUONSt2GeometryBuilder.h"
31 #include "AliMUONChamber.h"
32 #include "AliMUONGeometryModule.h"
33 #include "AliMUONGeometryEnvelopeStore.h"
35 ClassImp(AliMUONSt2GeometryBuilder)
37 //______________________________________________________________________________
38 AliMUONSt2GeometryBuilder::AliMUONSt2GeometryBuilder(AliMUON* muon)
39 : AliMUONVGeometryBuilder("st2.dat",
40 muon->Chamber(2).GetGeometry(),
41 muon->Chamber(3).GetGeometry()),
44 // Standard constructor
48 //______________________________________________________________________________
49 AliMUONSt2GeometryBuilder::AliMUONSt2GeometryBuilder()
50 : AliMUONVGeometryBuilder(),
53 // Default constructor
57 //______________________________________________________________________________
58 AliMUONSt2GeometryBuilder::AliMUONSt2GeometryBuilder(const AliMUONSt2GeometryBuilder& rhs)
59 : AliMUONVGeometryBuilder(rhs)
61 // Protected copy constructor
63 AliFatal("Copy constructor is not implemented.");
66 //______________________________________________________________________________
67 AliMUONSt2GeometryBuilder::~AliMUONSt2GeometryBuilder() {
71 //______________________________________________________________________________
72 AliMUONSt2GeometryBuilder&
73 AliMUONSt2GeometryBuilder::operator = (const AliMUONSt2GeometryBuilder& rhs)
75 // Protected assignement operator
77 // check assignement to self
78 if (this == &rhs) return *this;
80 AliFatal("Assignment operator is not implemented.");
89 //______________________________________________________________________________
90 void AliMUONSt2GeometryBuilder::CreateGeometry()
92 // From AliMUONv1::CreateGeometry()
95 //********************************************************************
97 //********************************************************************
98 // indices 1 and 2 for first and second chambers in the station
99 // iChamber (first chamber) kept for other quanties than Z,
100 // assumed to be the same in both chambers
102 // Get tracking medias Ids
103 Int_t *idtmed = fMUON->GetIdtmed()->GetArray()-1099;
104 Int_t idAir= idtmed[1100]; // medium 1
105 // Int_t idAlu1=idtmed[1103]; // medium 4
106 // Int_t idAlu2=idtmed[1104]; // medium 5
107 Int_t idGas=idtmed[1108]; // medium 9 = Ar-CO2 gas (80%+20%)
109 const Float_t kDeltaQuad = 0.01;//2.6; dummy value til we find the good value
110 const Float_t kDeltaZ = 6.5/2.;
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* iChamber = &fMUON->Chamber(2);
121 // AliMUONChamber* iChamber1 = iChamber;
122 // AliMUONChamber* iChamber2 = &fMUON->Chamber(3);
124 // Half of the total thickness of frame crosses (including DAlu)
125 // for each chamber in stations 1 and 2:
126 // 3% of X0 of composite material,
127 // but taken as Aluminium here, with same thickness in number of X0
128 // Float_t dframez = 3. * 8.9 / 100;
129 // DGas and DAlu not changed from standard values
130 // Double_t zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
131 // The same parameters are defined in builder for station 1
134 // Outer excess and inner recess for mother volume radius
135 // with respect to ROuter and RInner
136 // Float_t dframep=.001; // Value for station 3 should be 6 ...
137 // Width (RdPhi) of the frame crosses for stations 1 and 2 (cm)
138 // Float_t dframep1=.001;
139 // Float_t phi=2*TMath::Pi()/12/2;
140 // The same parameters are defined in builder for station 1 (30deg)
143 // Double_t dstation = (-iChamber2->Z()) - (-iChamber1->Z());
146 Float_t posx, posy, posz;
147 // Chamber Material represented by Alu sheet
148 tpar[0]= iChamber->RInner();
149 tpar[1]= iChamber->ROuter();
150 tpar[2] = (iChamber->DGas())/2;
156 gMC->Gsvolu("S03G", "TUBS", idGas, tpar, 5);
157 gMC->Gsvolu("S04G", "TUBS", idGas, tpar, 5);
166 gMC->Gsvolu("LE01", "TUBS", idAir, tpar, 5);
167 GetEnvelopes(2)->AddEnvelope("LE01", detElemId, true, TGeoTranslation(posx, posy, posz),
168 TGeoRotation("rot1",90,0,90,90,0,0) );
170 gMC->Gsvolu("LF01", "TUBS", idAir, tpar, 5);
171 GetEnvelopes(3)->AddEnvelope("LF01", detElemId, true, TGeoTranslation(posx, posy, posz),
172 TGeoRotation("rot1",90,0,90,90,0,0) );
174 gMC->Gsvolu("LE02", "TUBS", idAir, tpar, 5);
175 GetEnvelopes(2)->AddEnvelope("LE02", detElemId, true, TGeoTranslation(-posx, posy,-posz),
176 TGeoRotation("rot2",90,180,90,90,180,0) );
178 gMC->Gsvolu("LF02", "TUBS", idAir, tpar, 5);
179 GetEnvelopes(3)->AddEnvelope("LF02", detElemId, true, TGeoTranslation(-posx, posy,-posz),
180 TGeoRotation("rot2",90,180,90,90,180,0) );
182 gMC->Gsvolu("LE03", "TUBS", idAir, tpar, 5);
183 GetEnvelopes(2)->AddEnvelope("LE03", detElemId, true, TGeoTranslation(posx, -posy, -posz),
184 TGeoRotation("rot3",90,0,90,270,180,0) );
186 gMC->Gsvolu("LF03", "TUBS", idAir, tpar, 5);
187 GetEnvelopes(3)->AddEnvelope("LF03", detElemId, true, TGeoTranslation(posx, -posy, -posz),
188 TGeoRotation("rot3",90,0,90,270,180,0) );
190 gMC->Gsvolu("LE04", "TUBS", idAir, tpar, 5);
191 GetEnvelopes(2)->AddEnvelope("LE04", detElemId, true, TGeoTranslation(-posx, -posy, posz),
192 TGeoRotation("rot4",90,180,90,270,0,0) );
194 gMC->Gsvolu("LF04", "TUBS", idAir, tpar, 5);
195 GetEnvelopes(3)->AddEnvelope("LF04", detElemId, true, TGeoTranslation(-posx, -posy, posz),
196 TGeoRotation("rot4",90,180,90,270,0,0) );
198 GetEnvelopes(2)->AddEnvelopeConstituent("S03G", "LE01", 1);
199 GetEnvelopes(3)->AddEnvelopeConstituent("S04G", "LF01", 1);
201 GetEnvelopes(2)->AddEnvelopeConstituent("S03G", "LE02", 2);
202 GetEnvelopes(3)->AddEnvelopeConstituent("S04G", "LF02", 2);
204 GetEnvelopes(2)->AddEnvelopeConstituent("S03G", "LE03", 3);
205 GetEnvelopes(3)->AddEnvelopeConstituent("S04G", "LF03", 3);
207 GetEnvelopes(2)->AddEnvelopeConstituent("S03G", "LE04", 4);
208 GetEnvelopes(3)->AddEnvelopeConstituent("S04G", "LF04", 4);
211 //______________________________________________________________________________
212 void AliMUONSt2GeometryBuilder::SetTransformations()
214 // Defines the transformations for the station2 chambers.
217 AliMUONChamber* iChamber1 = &fMUON->Chamber(2);
218 Double_t zpos1 = - iChamber1->Z();
219 iChamber1->GetGeometry()
220 ->SetTranslation(TGeoTranslation(0., 0., zpos1));
222 AliMUONChamber* iChamber2 = &fMUON->Chamber(3);
223 Double_t zpos2 = - iChamber2->Z();
224 iChamber2->GetGeometry()
225 ->SetTranslation(TGeoTranslation(0., 0., zpos2));
228 //______________________________________________________________________________
229 void AliMUONSt2GeometryBuilder::SetSensitiveVolumes()
231 // Defines the sensitive volumes for station2 chambers.
234 GetGeometry(2)->SetSensitiveVolume("S03G");
235 GetGeometry(3)->SetSensitiveVolume("S04G");