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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
16// $Id$
17
18//-----------------------------------------------------------------------------
19// Class AliMUONSt1GeometryBuilder
20// -------------------------------
21// MUON Station1 coarse geometry construction class.
22// Extracted from AliMUONv1
23// by Ivana Hrivnacova, IPN Orsay
24// Included in AliRoot 2004/01/23
25//-----------------------------------------------------------------------------
26
27#include <TVirtualMC.h>
28#include <TGeoMatrix.h>
29
30#include "AliLog.h"
31
32#include "AliMUONSt1GeometryBuilder.h"
33#include "AliMUON.h"
34#include "TArrayI.h"
35#include "AliMUONConstants.h"
36#include "AliMUONGeometryModule.h"
37#include "AliMUONGeometryEnvelopeStore.h"
38
39using std::endl;
40using std::cout;
41/// \cond CLASSIMP
42ClassImp(AliMUONSt1GeometryBuilder)
43/// \endcond
44
45//______________________________________________________________________________
46AliMUONSt1GeometryBuilder::AliMUONSt1GeometryBuilder(AliMUON* muon)
47 : AliMUONVGeometryBuilder(0, 2),
48 fMUON(muon)
49{
50/// Standard constructor
51
52}
53
54//______________________________________________________________________________
55AliMUONSt1GeometryBuilder::AliMUONSt1GeometryBuilder()
56 : AliMUONVGeometryBuilder(),
57 fMUON(0)
58{
59/// Default constructor
60}
61
62//______________________________________________________________________________
63AliMUONSt1GeometryBuilder::~AliMUONSt1GeometryBuilder()
64{
65/// Destructor
66}
67
68//
69// public methods
70//
71
72//______________________________________________________________________________
73void AliMUONSt1GeometryBuilder::CreateGeometry()
74{
75/// From AliMUONv1::CreateGeometry()
76
77//********************************************************************
78// Station 1 **
79//********************************************************************
80// CONCENTRIC
81 // indices 1 and 2 for first and second chambers in the station
82 // iChamber (first chamber) kept for other quanties than Z,
83 // assumed to be the same in both chambers
84
85 // Get tracking medias Ids
86 Int_t *idtmed = fMUON->GetIdtmed()->GetArray()-1099;
87 Int_t idAir= idtmed[1100]; // medium 1
88 Int_t idAlu1=idtmed[1103]; // medium 4
89 Int_t idAlu2=idtmed[1104]; // medium 5
90 Int_t idGas=idtmed[1108]; // medium 9 = Ar-CO2 gas (80%+20%)
91 Bool_t frameCrosses=kTRUE;
92
93 // Rotation matrices in the x-y plane
94 // phi= 0 deg
95 Int_t irot1;
96 fMUON->AliMatrix(irot1, 90., 0., 90., 90., 0., 0.);
97 // phi= 90 deg
98 Int_t irot2;
99 fMUON->AliMatrix(irot2, 90., 90., 90., 180., 0., 0.);
100
101 // DGas decreased from standard one (0.5)
102 const Float_t kDGas = 0.4;
103
104 // DAlu increased from standard one (3% of X0),
105 // because more electronics with smaller pads
106 const Float_t kDAlu = 3.5 * 8.9 / 100.;
107
108 // Half of the total thickness of frame crosses (including DAlu)
109 // for each chamber in stations 1 and 2:
110 // 3% of X0 of composite material,
111 // but taken as Aluminium here, with same thickness in number of X0
112 Float_t dframez = 3. * 8.9 / 100;
113 Float_t zfpos=-(kDGas+dframez+kDAlu)/2;
114 // The same parameters are defined in builder for station 2
115
116 // Mother volume
117 // Outer excess and inner recess for mother volume radius
118 // with respect to ROuter and RInner
119 Float_t dframep=.001; // Value for station 3 should be 6 ...
120 // Width (RdPhi) of the frame crosses for stations 1 and 2 (cm)
121 // Float_t dframep1=.001;
122 Float_t dframep1 = 11.0;
123 Float_t phi=2*TMath::Pi()/12/2;
124 // The same parameters are defined in builder for station 2
125
126 Float_t tpar[3];
127 Float_t dstation = (-AliMUONConstants::DefaultChamberZ(1)) -
128 (-AliMUONConstants::DefaultChamberZ(0));
129 tpar[0] = AliMUONConstants::Rmin(0)-dframep;
130 tpar[1] = (AliMUONConstants::Rmax(0)+dframep)/TMath::Cos(phi);
131 tpar[2] = dstation/5;
132
133 gMC->Gsvolu("S01M", "TUBE", idAir, tpar, 3);
134 gMC->Gsvolu("S02M", "TUBE", idAir, tpar, 3);
135
136 // CHANGED
137 //gMC->Gspos("S01M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
138 //gMC->Gspos("S02M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
139
140 GetEnvelopes(0)->AddEnvelope("S01M", 100, false);
141 GetEnvelopes(1)->AddEnvelope("S02M", 200, false);
142
143
144// // Aluminium frames
145// // Outer frames
146// pgpar[0] = 360/12/2;
147// pgpar[1] = 360.;
148// pgpar[2] = 12.;
149// pgpar[3] = 2;
150// pgpar[4] = -dframez/2;
151// pgpar[5] = AliMUONConstants::Rmax(0);
152// pgpar[6] = pgpar[5]+dframep1;
153// pgpar[7] = +dframez/2;
154// pgpar[8] = pgpar[5];
155// pgpar[9] = pgpar[6];
156// gMC->Gsvolu("S01O", "PGON", idAlu1, pgpar, 10);
157// gMC->Gsvolu("S02O", "PGON", idAlu1, pgpar, 10);
158// gMC->Gspos("S01O",1,"S01M", 0.,0.,-zfpos, 0,"ONLY");
159// gMC->Gspos("S01O",2,"S01M", 0.,0.,+zfpos, 0,"ONLY");
160// gMC->Gspos("S02O",1,"S02M", 0.,0.,-zfpos, 0,"ONLY");
161// gMC->Gspos("S02O",2,"S02M", 0.,0.,+zfpos, 0,"ONLY");
162// //
163// // Inner frame
164// tpar[0]= AliMUONConstants::Rmin(0)-dframep1;
165// tpar[1]= AliMUONConstants::Rmin(0);
166// tpar[2]= dframez/2;
167// gMC->Gsvolu("S01I", "TUBE", idAlu1, tpar, 3);
168// gMC->Gsvolu("S02I", "TUBE", idAlu1, tpar, 3);
169
170// gMC->Gspos("S01I",1,"S01M", 0.,0.,-zfpos, 0,"ONLY");
171// gMC->Gspos("S01I",2,"S01M", 0.,0.,+zfpos, 0,"ONLY");
172// gMC->Gspos("S02I",1,"S02M", 0.,0.,-zfpos, 0,"ONLY");
173// gMC->Gspos("S02I",2,"S02M", 0.,0.,+zfpos, 0,"ONLY");
174//
175// Frame Crosses
176 if (frameCrosses) {
177 // outside gas
178 // security for inside mother volume
179 Float_t bpar[3];
180 bpar[0] = (AliMUONConstants::Rmax(0) - AliMUONConstants::Rmin(0))
181 * TMath::Cos(TMath::ASin(dframep1 /
182 (AliMUONConstants::Rmax(0) - AliMUONConstants::Rmin(0))))
183 / 2.0;
184 bpar[1] = dframep1/2;
185 // total thickness will be (4 * bpar[2]) for each chamber,
186 // which has to be equal to (2 * dframez) - DAlu
187 bpar[2] = (2.0 * dframez - kDAlu) / 4.0;
188 gMC->Gsvolu("S01B", "BOX", idAlu1, bpar, 3);
189 gMC->Gsvolu("S02B", "BOX", idAlu1, bpar, 3);
190
191 gMC->Gspos("S01B",1,"S01M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,-zfpos,
192 irot1,"ONLY");
193 gMC->Gspos("S01B",2,"S01M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,-zfpos,
194 irot1,"ONLY");
195 gMC->Gspos("S01B",3,"S01M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,-zfpos,
196 irot2,"ONLY");
197 gMC->Gspos("S01B",4,"S01M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,-zfpos,
198 irot2,"ONLY");
199 gMC->Gspos("S01B",5,"S01M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,+zfpos,
200 irot1,"ONLY");
201 gMC->Gspos("S01B",6,"S01M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,+zfpos,
202 irot1,"ONLY");
203 gMC->Gspos("S01B",7,"S01M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,+zfpos,
204 irot2,"ONLY");
205 gMC->Gspos("S01B",8,"S01M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,+zfpos,
206 irot2,"ONLY");
207
208 gMC->Gspos("S02B",1,"S02M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,-zfpos,
209 irot1,"ONLY");
210 gMC->Gspos("S02B",2,"S02M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,-zfpos,
211 irot1,"ONLY");
212 gMC->Gspos("S02B",3,"S02M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,-zfpos,
213 irot2,"ONLY");
214 gMC->Gspos("S02B",4,"S02M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,-zfpos,
215 irot2,"ONLY");
216 gMC->Gspos("S02B",5,"S02M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,+zfpos,
217 irot1,"ONLY");
218 gMC->Gspos("S02B",6,"S02M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,+zfpos,
219 irot1,"ONLY");
220 gMC->Gspos("S02B",7,"S02M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,+zfpos,
221 irot2,"ONLY");
222 gMC->Gspos("S02B",8,"S02M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,+zfpos,
223 irot2,"ONLY");
224 }
225//
226// Chamber Material represented by Alu sheet
227 tpar[0]= AliMUONConstants::Rmin(0);
228 tpar[1]= AliMUONConstants::Rmax(0);
229 tpar[2] = (kDGas+kDAlu)/2;
230 gMC->Gsvolu("S01A", "TUBE", idAlu2, tpar, 3);
231 gMC->Gsvolu("S02A", "TUBE",idAlu2, tpar, 3);
232 gMC->Gspos("S01A", 1, "S01M", 0., 0., 0., 0, "ONLY");
233 gMC->Gspos("S02A", 1, "S02M", 0., 0., 0., 0, "ONLY");
234//
235// Sensitive volumes
236 // tpar[2] = kDGas;
237 tpar[2] = kDGas/2;
238 gMC->Gsvolu("S01G", "TUBE", idGas, tpar, 3);
239 gMC->Gsvolu("S02G", "TUBE", idGas, tpar, 3);
240 gMC->Gspos("S01G", 1, "S01A", 0., 0., 0., 0, "ONLY");
241 gMC->Gspos("S02G", 1, "S02A", 0., 0., 0., 0, "ONLY");
242//
243// Frame Crosses to be placed inside gas
244 // NONE: chambers are sensitive everywhere
245// if (frameCrosses) {
246
247// dr = (AliMUONConstants::Rmax(0) - AliMUONConstants::Rmin(0));
248// bpar[0] = TMath::Sqrt(dr*dr-dframep1*dframep1/4)/2;
249// bpar[1] = dframep1/2;
250// bpar[2] = kDGas/2;
251// gMC->Gsvolu("S01F", "BOX", idAlu1, bpar, 3);
252// gMC->Gsvolu("S02F", "BOX", idAlu1, bpar, 3);
253
254// gMC->Gspos("S01F",1,"S01G", +AliMUONConstants::Rmin(0)+bpar[0] , 0, 0,
255// irot1,"ONLY");
256// gMC->Gspos("S01F",2,"S01G", -AliMUONConstants::Rmin(0)-bpar[0] , 0, 0,
257// irot1,"ONLY");
258// gMC->Gspos("S01F",3,"S01G", 0, +AliMUONConstants::Rmin(0)+bpar[0] , 0,
259// irot2,"ONLY");
260// gMC->Gspos("S01F",4,"S01G", 0, -AliMUONConstants::Rmin(0)-bpar[0] , 0,
261// irot2,"ONLY");
262
263// gMC->Gspos("S02F",1,"S02G", +AliMUONConstants::Rmin(0)+bpar[0] , 0, 0,
264// irot1,"ONLY");
265// gMC->Gspos("S02F",2,"S02G", -AliMUONConstants::Rmin(0)-bpar[0] , 0, 0,
266// irot1,"ONLY");
267// gMC->Gspos("S02F",3,"S02G", 0, +AliMUONConstants::Rmin(0)+bpar[0] , 0,
268// irot2,"ONLY");
269// gMC->Gspos("S02F",4,"S02G", 0, -AliMUONConstants::Rmin(0)-bpar[0] , 0,
270// irot2,"ONLY");
271// }
272}
273
274//______________________________________________________________________________
275void AliMUONSt1GeometryBuilder::SetVolumes()
276{
277/// Define the volumes for the station2 chambers.
278}
279
280//______________________________________________________________________________
281void AliMUONSt1GeometryBuilder::SetTransformations()
282{
283/// Define the transformations for the station2 chambers.
284
285 Double_t zpos1= - AliMUONConstants::DefaultChamberZ(0);
286 SetTranslation(0, TGeoTranslation(0., 0., zpos1));
287
288 Double_t zpos2 = - AliMUONConstants::DefaultChamberZ(1);
289 SetTranslation(0, TGeoTranslation(0., 0., zpos2));
290}
291
292//______________________________________________________________________________
293void AliMUONSt1GeometryBuilder::SetSensitiveVolumes()
294{
295/// Define the sensitive volumes for station1 chambers.
296
297 GetGeometry(0)->SetSensitiveVolume("S01G");
298 GetGeometry(1)->SetSensitiveVolume("S02G");
299}