chamber numerotation according to reality
[u/mrichter/AliRoot.git] / MUON / AliMUONTriggerGeometryBuilder.cxx
1 /**************************************************************************
2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3  *                                                                        *
4  * Author: The ALICE Off-line Project.                                    *
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15
16 // $Id$
17 //
18 // Class AliMUONTriggerGeometryBuilder
19 // -----------------------------------
20 // MUON Trigger stations geometry construction class.
21 //
22 // Author: Philippe Crochette, LPC Clermont-Ferrand
23
24 #include <TVirtualMC.h>
25 #include <TGeoMatrix.h>
26
27 #include "AliMUONTriggerGeometryBuilder.h"
28 #include "AliMUON.h"
29 #include "AliMUONChamber.h"
30 #include "AliMUONChamberGeometry.h"
31
32 ClassImp(AliMUONTriggerGeometryBuilder)
33
34 //______________________________________________________________________________
35 AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder(AliMUON* muon)
36  : AliMUONVGeometryBuilder(&muon->Chamber(10), &muon->Chamber(11),&muon->Chamber(12),&muon->Chamber(13)),
37    fMUON(muon)
38 {
39 // Standard constructor
40
41 }
42
43 //______________________________________________________________________________
44 AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder()
45  : AliMUONVGeometryBuilder(),
46    fMUON(0)
47 {
48 // Default constructor
49 }
50
51
52 //______________________________________________________________________________
53 AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder(const AliMUONTriggerGeometryBuilder& rhs)
54   : AliMUONVGeometryBuilder(rhs)
55 {
56 // Protected copy constructor
57
58   Fatal("Copy constructor", 
59         "Copy constructor is not implemented.");
60 }
61
62 //______________________________________________________________________________
63 AliMUONTriggerGeometryBuilder::~AliMUONTriggerGeometryBuilder() {
64 //
65 }
66
67 //______________________________________________________________________________
68 AliMUONTriggerGeometryBuilder& 
69 AliMUONTriggerGeometryBuilder::operator = (const AliMUONTriggerGeometryBuilder& rhs) 
70 {
71 // Protected assignement operator
72
73   // check assignement to self
74   if (this == &rhs) return *this;
75
76   Fatal("operator=", 
77         "Assignment operator is not implemented.");
78     
79   return *this;  
80 }
81
82 //
83 // public methods
84 //
85
86 //______________________________________________________________________________
87 void AliMUONTriggerGeometryBuilder::CreateGeometry()
88 {
89 // From AliMUONv1::CreateGeometry()
90
91     /* 
92        zpos1 and zpos2 are the middle of the first and second
93        planes of station 1 (+1m for second station):
94        zpos1=(zpos1m+zpos1p)/2=(15999+16071)/2=16035 mm, thick/2=40 mm
95        zpos2=(zpos2m+zpos2p)/2=(16169+16241)/2=16205 mm, thick/2=40 mm
96        zposxm and zposxp= middles of gaz gaps within a detection plane
97        rem: the total thickness accounts for 1 mm of al on both
98        side of the RPCs (see zpos1 and zpos2)
99     */
100     
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     Float_t tpar[3];
105     Double_t dpar[3];    
106     
107 // vertical gap between right and left chambers (kDXZERO*2=4cm)
108     const Float_t kDXZERO=2.; 
109 // main distances for chamber definition in first plane/first station
110     const Float_t kXMIN=34.;       
111     const Float_t kXMED=51.;                                
112     const Float_t kXMAX=272.; 
113 // kXMAX will become 255. in real life. segmentation to be updated accordingly
114 // (see fig.2-4 & 2-5 of Local Trigger Board PRR)
115     const Float_t kYMIN=34.;                              
116     const Float_t kYMAX=51.;                              
117 // inner/outer radius of flange between beam shield. and chambers (1/station)
118     const Float_t kRMIN[2]={50.,50.};
119     const Float_t kRMAX[2]={64.,68.};
120 // z position of the middle of the gas gap in mother vol 
121     const Float_t kZm=-3.6;
122     const Float_t kZp=+3.6;     
123
124     AliMUONChamber *iChamber, *iChamber1;
125     iChamber1 = GetChamber(10);
126     Float_t zpos1=-iChamber1->Z(); 
127     
128 // ratio of zpos1m/zpos1p and inverse for first plane
129     Float_t zmp=(zpos1-3.6)/(zpos1+3.6);
130     Float_t zpm=1./zmp;
131     
132     Int_t icount=0;  // chamber counter (0 1 2 3)
133     
134     for (Int_t istation=0; istation<2; istation++) { // loop on stations
135         for (Int_t iplane=0; iplane<2; iplane++) { // loop on detection planes
136             
137             Int_t iVolNum=1; // counter Volume Number
138             icount = Int_t(iplane*TMath::Power(2,0))+
139                 Int_t(istation*TMath::Power(2,1));
140             
141             iChamber = GetChamber(10+icount);
142             Float_t zpos = - iChamber->Z();          
143             
144 // Flange between beam shielding and RPC 
145             tpar[0]= kRMIN[istation];
146             tpar[1]= kRMAX[istation];
147             tpar[2]= 4.0;           
148             char volFlange[5];
149             sprintf(volFlange,"SF%dA",icount+1);         
150             gMC->Gsvolu(volFlange,"TUBE",idAlu1,tpar,3);     // Al
151             // changed by ivana
152             //gMC->Gspos(volFlange,1,"ALIC",0.,0.,zpos,0,"MANY");
153             iChamber->GetGeometry()->AddEnvelope(volFlange, false, "MANY");
154             
155 // scaling factor
156             Float_t zRatio = zpos / zpos1;
157             
158 // envelopes (same size except line 5, all virtual)
159             char volEnv[18][5];
160             tpar[1] = kYMIN * zRatio; 
161             tpar[2] = 0.4;
162             Int_t i=0;    // counter
163             for (Int_t icolumn=0; icolumn<2; icolumn++) {
164                 for (Int_t iline=1; iline<10; iline++){
165                     tpar[0] = (kXMAX/2.) * zRatio;
166                     if (iline==5) tpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
167                     if (icolumn==0) 
168                         sprintf(volEnv[i],"S%dR%d",icount,iline);
169                     else
170                         sprintf(volEnv[i],"S%dL%d",icount,iline);
171                     gMC->Gsvolu(volEnv[i],"BOX",idAir,tpar,0); 
172                     i++;
173                 }
174             }
175
176 // chamber prototype
177             tpar[0]= 0.;
178             tpar[1]= 0.;
179             tpar[2]= 0.;            
180             char volAlu[5];     // Alu 
181             char volBak[5];     // Bakelite
182             char volGaz[5];     // Gas streamer     
183             sprintf(volAlu,"SC%dA",icount+1);
184             sprintf(volBak,"SB%dA",icount+1);
185             sprintf(volGaz,"SG%dA",icount+1);
186             gMC->Gsvolu(volAlu,"BOX",idAlu1,tpar,0);         // Al
187             gMC->Gsvolu(volBak,"BOX",idtmed[1107],tpar,0);   // Bakelite
188             gMC->Gsvolu(volGaz,"BOX",idtmed[1106],tpar,0);   // Gas streamer
189             tpar[0] = -1.;
190             tpar[1] = -1.;
191             tpar[2] = 0.1;    
192             gMC->Gsposp(volGaz,1,volBak,0.,0.,0.,0,"ONLY",tpar,3);
193             tpar[2] = 0.3;
194             gMC->Gsposp(volBak,1,volAlu,0.,0.,0.,0,"ONLY",tpar,3);
195
196 // chamber type A
197             Float_t xEnv = (kDXZERO+kXMED+(kXMAX-kXMED)/2.)*zRatio;
198             Float_t yEnvM = 0.;  // y low position of envelope in chamber
199             Float_t yEnvP = 0.;  // y up position of envelope in chamber
200             Float_t yEnvPsave = 0.; // tmp data
201             Float_t yEnvMsave = 0.; // tmp data
202             Float_t xpos = 0.; // x position of RPC in envelope     
203             Float_t ypos = 0.; // y position of RPC in envelope
204             dpar[2] = 0.4;          
205             dpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
206             dpar[1] = kYMIN * zRatio;
207
208             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[4], true, TGeoTranslation(xEnv,yEnvM,kZm));
209             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[13], true, TGeoTranslation(-xEnv,yEnvP,kZp));
210
211             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[4],iVolNum++,3, dpar);
212             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[13],iVolNum++,3, dpar);         
213
214 // chamber type B (plus envelope chambers B & C)   
215             xEnv = (kDXZERO+kXMAX/2.)*zRatio;
216             yEnvPsave = yEnvP;
217             yEnvMsave = yEnvM;
218             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
219             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
220             dpar[0] = ((kXMAX-kXMIN)/2.) * zRatio;
221             dpar[1] = ((kYMAX-kYMIN)/2.) * zRatio;
222             xpos = kXMIN/2. * zRatio;
223             ypos = (kYMIN - kYMIN/4.) * zRatio;
224
225             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[3], true, TGeoTranslation( xEnv,-yEnvP,kZp));
226             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[5], true, TGeoTranslation( xEnv, yEnvP,kZp));
227             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[12], true, TGeoTranslation(-xEnv,-yEnvM,kZm));
228             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[14], true, TGeoTranslation(-xEnv, yEnvM,kZm));
229
230             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
231             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
232             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(-xpos, ypos,0.),3,dpar);
233             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(-xpos,-ypos,0.),3,dpar);
234
235 // chamber type C (note: same Z than type B)
236             dpar[0] = (kXMAX/2)*zRatio;
237             dpar[1] = (kYMAX/2)*zRatio;
238             xpos = 0.;      
239             ypos = ((kYMAX - kYMIN)/2.) * zRatio;
240
241             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
242             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
243             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(-xpos,-ypos,0.),3,dpar);
244             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(-xpos, ypos,0.),3,dpar);
245     
246 // chamber type D, E and F (same size)
247 // D        
248             yEnvPsave = yEnvP;
249             yEnvMsave = yEnvM;
250             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
251             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
252             dpar[0] = (kXMAX/2.)*zRatio;
253             dpar[1] =  kYMIN*zRatio;
254
255             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[2], true, TGeoTranslation(xEnv,-yEnvM,kZm));
256             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[6], true, TGeoTranslation(xEnv, yEnvM,kZm));
257             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[11], true, TGeoTranslation(-xEnv,-yEnvP,kZp));
258             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[15], true, TGeoTranslation(-xEnv, yEnvP,kZp));
259
260             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[2],iVolNum++,3, dpar);
261             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[6],iVolNum++,3, dpar);
262             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[11],iVolNum++,3, dpar);
263             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[15],iVolNum++,3, dpar);
264
265 // E
266             yEnvPsave = yEnvP;
267             yEnvMsave = yEnvM;
268             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
269             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
270
271             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[1], true, TGeoTranslation(xEnv,-yEnvP,kZp));
272             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[7], true, TGeoTranslation(xEnv, yEnvP,kZp));
273             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[10], true, TGeoTranslation(-xEnv,-yEnvM,kZm));
274             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[16], true, TGeoTranslation(-xEnv, yEnvM,kZm));
275
276             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[1],iVolNum++,3,dpar);
277             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[7],iVolNum++,3,dpar);
278             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[10],iVolNum++,3,dpar);
279             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[16],iVolNum++,3,dpar);
280
281
282 // F
283             yEnvPsave = yEnvP;
284             yEnvMsave = yEnvM;
285             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
286             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
287
288             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[0], true, TGeoTranslation(xEnv,-yEnvM,kZm));
289             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[8], true, TGeoTranslation(xEnv, yEnvM,kZm));
290             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[9], true, TGeoTranslation(-xEnv,-yEnvP,kZp));
291             GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[17], true, TGeoTranslation(-xEnv, yEnvP,kZp));
292             
293             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[0],iVolNum++,3,dpar);
294             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[8],iVolNum++,3,dpar);
295             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[9],iVolNum++,3,dpar);
296             GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[17],iVolNum++,3,dpar);
297
298         } // end loop on detection planes
299     } // end loop on stations    
300 }
301
302 //______________________________________________________________________________
303 void AliMUONTriggerGeometryBuilder::SetTransformations() 
304 {
305 // Defines the transformations for the trigger chambers.
306 // ---
307     Double_t zpos1, zpos2;    
308     AliMUONChamber *iChamber1, *iChamber2;
309
310     iChamber1 = GetChamber(10);
311     zpos1= - iChamber1->Z(); 
312     iChamber1->GetGeometry()
313         ->SetTranslation(TGeoTranslation(0., 0., zpos1));
314     
315     iChamber2 = GetChamber(11);
316     zpos2 = - iChamber2->Z(); 
317     iChamber2->GetGeometry()
318         ->SetTranslation(TGeoTranslation(0., 0., zpos2));
319
320     iChamber1 = GetChamber(12);
321     zpos1 = - iChamber1->Z(); 
322     iChamber1->GetGeometry()
323         ->SetTranslation(TGeoTranslation(0., 0., zpos1));
324     
325     iChamber2 = GetChamber(13);
326     zpos2 = - iChamber2->Z(); 
327     iChamber2->GetGeometry()
328         ->SetTranslation(TGeoTranslation(0., 0., zpos2));
329 }
330
331 //______________________________________________________________________________
332 void AliMUONTriggerGeometryBuilder::SetSensitiveVolumes()
333 {
334 // Defines the sensitive volumes for trigger station chambers.
335 // ---
336
337   GetChamber(10)->GetGeometry()->SetSensitiveVolume("SG1A");
338   GetChamber(11)->GetGeometry()->SetSensitiveVolume("SG2A");
339   GetChamber(12)->GetGeometry()->SetSensitiveVolume("SG3A");
340   GetChamber(13)->GetGeometry()->SetSensitiveVolume("SG4A");
341 }
342