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 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 "AliMUONConstants.h"
32 #include "AliMUONGeometryModule.h"
33 #include "AliMUONGeometryEnvelopeStore.h"
35 ClassImp(AliMUONSt2GeometryBuilder)
37 //______________________________________________________________________________
38 AliMUONSt2GeometryBuilder::AliMUONSt2GeometryBuilder(AliMUON* muon)
39 : AliMUONVGeometryBuilder(2, 3),
42 // Standard constructor
46 //______________________________________________________________________________
47 AliMUONSt2GeometryBuilder::AliMUONSt2GeometryBuilder()
48 : AliMUONVGeometryBuilder(),
51 // Default constructor
55 //______________________________________________________________________________
56 AliMUONSt2GeometryBuilder::AliMUONSt2GeometryBuilder(const AliMUONSt2GeometryBuilder& rhs)
57 : AliMUONVGeometryBuilder(rhs)
59 // Protected copy constructor
61 AliFatal("Copy constructor is not implemented.");
64 //______________________________________________________________________________
65 AliMUONSt2GeometryBuilder::~AliMUONSt2GeometryBuilder() {
69 //______________________________________________________________________________
70 AliMUONSt2GeometryBuilder&
71 AliMUONSt2GeometryBuilder::operator = (const AliMUONSt2GeometryBuilder& rhs)
73 // Protected assignement operator
75 // check assignement to self
76 if (this == &rhs) return *this;
78 AliFatal("Assignment operator is not implemented.");
87 //______________________________________________________________________________
88 void AliMUONSt2GeometryBuilder::CreateGeometry()
90 // From AliMUONv1::CreateGeometry()
93 //********************************************************************
95 //********************************************************************
96 // indices 1 and 2 for first and second chambers in the station
97 // iChamber (first chamber) kept for other quanties than Z,
98 // assumed to be the same in both chambers
100 // Get tracking medias Ids
101 Int_t *idtmed = fMUON->GetIdtmed()->GetArray()-1099;
102 Int_t idAir= idtmed[1100]; // medium 1
103 // Int_t idAlu1=idtmed[1103]; // medium 4
104 // Int_t idAlu2=idtmed[1104]; // medium 5
105 Int_t idGas=idtmed[1108]; // medium 9 = Ar-CO2 gas (80%+20%)
107 const Float_t kDeltaQuad = 0.01;//2.6; dummy value til we find the good value
108 const Float_t kDeltaZ = 6.5/2.;
110 // Rotation matrices in the x-y plane
113 fMUON->AliMatrix(irot1, 90., 0., 90., 90., 0., 0.);
116 fMUON->AliMatrix(irot2, 90., 90., 90., 180., 0., 0.);
118 // Half of the total thickness of frame crosses (including DAlu)
119 // for each chamber in stations 1 and 2:
120 // 3% of X0 of composite material,
121 // but taken as Aluminium here, with same thickness in number of X0
122 // Float_t dframez = 3. * 8.9 / 100;
123 // DGas and DAlu not changed from standard values
124 // Double_t zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
125 // The same parameters are defined in builder for station 1
128 const Float_t kDGas = 0.5;
130 // 3% radiation length of aluminum (X0=8.9 cm)
131 // const Float_t kDAlu = 3.5 * 8.9 / 100.;
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]= AliMUONConstants::Rmin(1);
149 tpar[1]= AliMUONConstants::Rmax(1);
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 // Define chamber volumes as virtual
218 SetVolume(2, "SC03", true);
219 SetVolume(3, "SC04", true);
221 Double_t zpos1 = - AliMUONConstants::DefaultChamberZ(2);
222 SetTranslation(2, TGeoTranslation(0., 0., zpos1));
224 Double_t zpos2 = - AliMUONConstants::DefaultChamberZ(3);
225 SetTranslation(3, 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");