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 AliMUONTriggerGeometryBuilder
19 // -----------------------------------
20 // MUON Trigger stations geometry construction class.
22 // Author: Philippe Crochette, LPC Clermont-Ferrand
24 #include <TVirtualMC.h>
25 #include <TGeoMatrix.h>
27 #include "AliMUONTriggerGeometryBuilder.h"
29 #include "AliMUONChamber.h"
30 #include "AliMUONChamberGeometry.h"
32 ClassImp(AliMUONTriggerGeometryBuilder)
34 //______________________________________________________________________________
35 AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder(AliMUON* muon)
36 : AliMUONVGeometryBuilder(&muon->Chamber(10), &muon->Chamber(11),&muon->Chamber(12),&muon->Chamber(13)),
39 // Standard constructor
43 //______________________________________________________________________________
44 AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder()
45 : AliMUONVGeometryBuilder(),
48 // Default constructor
52 //______________________________________________________________________________
53 AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder(const AliMUONTriggerGeometryBuilder& rhs)
54 : AliMUONVGeometryBuilder(rhs)
56 // Protected copy constructor
58 Fatal("Copy constructor",
59 "Copy constructor is not implemented.");
62 //______________________________________________________________________________
63 AliMUONTriggerGeometryBuilder::~AliMUONTriggerGeometryBuilder() {
67 //______________________________________________________________________________
68 AliMUONTriggerGeometryBuilder&
69 AliMUONTriggerGeometryBuilder::operator = (const AliMUONTriggerGeometryBuilder& rhs)
71 // Protected assignement operator
73 // check assignement to self
74 if (this == &rhs) return *this;
77 "Assignment operator is not implemented.");
86 //______________________________________________________________________________
87 void AliMUONTriggerGeometryBuilder::CreateGeometry()
89 // From AliMUONv1::CreateGeometry()
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)
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 detElementNumber=0; // Detection Element Number
108 // vertical gap between right and left chambers (kDXZERO*2=4cm)
109 const Float_t kDXZERO=2.;
110 // main distances for chamber definition in first plane/first station
111 const Float_t kXMIN=34.;
112 const Float_t kXMED=51.;
113 const Float_t kXMAX=255.;
114 // 090704 kXMAX changed from 272 to 255.
115 // (see fig.2-4 & 2-5 of Local Trigger Board PRR)
116 // segmentation updated accordingly
117 const Float_t kYMIN=34.;
118 const Float_t kYMAX=51.;
119 // inner/outer radius of flange between beam shield. and chambers (1/station)
120 const Float_t kRMIN[2]={50.,50.};
121 const Float_t kRMAX[2]={64.,68.};
122 // z position of the middle of the gas gap in mother vol
123 const Float_t kZm=-3.6;
124 const Float_t kZp=+3.6;
126 AliMUONChamber *iChamber, *iChamber1;
127 iChamber1 = GetChamber(10);
128 Float_t zpos1=-iChamber1->Z();
130 // ratio of zpos1m/zpos1p and inverse for first plane
131 Float_t zmp=(zpos1-3.6)/(zpos1+3.6);
134 Int_t icount=0; // chamber counter (0 1 2 3)
136 for (Int_t istation=0; istation<2; istation++) { // loop on stations
137 for (Int_t iplane=0; iplane<2; iplane++) { // loop on detection planes
139 Int_t iVolNum=1; // counter Volume Number
140 icount = Int_t(iplane*TMath::Power(2,0))+
141 Int_t(istation*TMath::Power(2,1));
143 iChamber = GetChamber(10+icount);
144 Float_t zpos = - iChamber->Z();
146 // Flange between beam shielding and RPC
147 tpar[0]= kRMIN[istation];
148 tpar[1]= kRMAX[istation];
151 sprintf(volFlange,"SF%dA",icount+1);
152 gMC->Gsvolu(volFlange,"TUBE",idAlu1,tpar,3); // Al
154 //gMC->Gspos(volFlange,1,"ALIC",0.,0.,zpos,0,"MANY");
155 iChamber->GetGeometry()->AddEnvelope(volFlange, false, "MANY");
158 Float_t zRatio = zpos / zpos1;
160 // envelopes (same size except line 5, all virtual)
162 tpar[1] = kYMIN * zRatio;
164 Int_t i=0; // counter
165 for (Int_t icolumn=0; icolumn<2; icolumn++) {
166 for (Int_t iline=1; iline<10; iline++){
167 tpar[0] = (kXMAX/2.) * zRatio;
168 if (iline==5) tpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
170 sprintf(volEnv[i],"S%dR%d",icount,iline);
172 sprintf(volEnv[i],"S%dL%d",icount,iline);
173 gMC->Gsvolu(volEnv[i],"BOX",idAir,tpar,0);
182 char volAlu[5]; // Alu
183 char volBak[5]; // Bakelite
184 char volGaz[5]; // Gas streamer
185 sprintf(volAlu,"SC%dA",icount+1);
186 sprintf(volBak,"SB%dA",icount+1);
187 sprintf(volGaz,"SG%dA",icount+1);
188 gMC->Gsvolu(volAlu,"BOX",idAlu1,tpar,0); // Al
189 gMC->Gsvolu(volBak,"BOX",idtmed[1107],tpar,0); // Bakelite
190 gMC->Gsvolu(volGaz,"BOX",idtmed[1106],tpar,0); // Gas streamer
194 gMC->Gsposp(volGaz,1,volBak,0.,0.,0.,0,"ONLY",tpar,3);
196 gMC->Gsposp(volBak,1,volAlu,0.,0.,0.,0,"ONLY",tpar,3);
199 Float_t xEnv = (kDXZERO+kXMED+(kXMAX-kXMED)/2.)*zRatio;
200 Float_t yEnvM = 0.; // y low position of envelope in chamber
201 Float_t yEnvP = 0.; // y up position of envelope in chamber
202 Float_t yEnvPsave = 0.; // tmp data
203 Float_t yEnvMsave = 0.; // tmp data
204 Float_t xpos = 0.; // x position of RPC in envelope
205 Float_t ypos = 0.; // y position of RPC in envelope
207 dpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
208 dpar[1] = kYMIN * zRatio;
210 detElementNumber = (10+icount+1)*100+4;
211 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[4], true, TGeoTranslation(xEnv,yEnvM,kZm));
212 detElementNumber = (10+icount+1)*100+50+4;
213 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[13], true, TGeoTranslation(-xEnv,yEnvP,kZp));
215 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[4],iVolNum++,3, dpar);
216 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[13],iVolNum++,3, dpar);
218 // chamber type B (plus envelope chambers B & C)
219 xEnv = (kDXZERO+kXMAX/2.)*zRatio;
222 yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
223 yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
224 dpar[0] = ((kXMAX-kXMIN)/2.) * zRatio;
225 dpar[1] = ((kYMAX-kYMIN)/2.) * zRatio;
226 xpos = kXMIN/2. * zRatio;
227 ypos = (kYMIN - kYMIN/4.) * zRatio;
229 detElementNumber = (10+icount+1)*100+3;
230 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[3], true, TGeoTranslation( xEnv,-yEnvP,kZp));
231 detElementNumber = (10+icount+1)*100+5;
232 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[5], true, TGeoTranslation( xEnv, yEnvP,kZp));
233 detElementNumber = (10+icount+1)*100+50+3;
234 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[12], true, TGeoTranslation(-xEnv,-yEnvM,kZm));
235 detElementNumber = (10+icount+1)*100+50+5;
236 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[14], true, TGeoTranslation(-xEnv, yEnvM,kZm));
238 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
239 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
240 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(-xpos, ypos,0.),3,dpar);
241 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(-xpos,-ypos,0.),3,dpar);
243 // chamber type C (note: same Z than type B)
244 dpar[0] = (kXMAX/2)*zRatio;
245 dpar[1] = (kYMAX/2)*zRatio;
247 ypos = ((kYMAX - kYMIN)/2.) * zRatio;
249 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
250 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
251 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(-xpos,-ypos,0.),3,dpar);
252 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(-xpos, ypos,0.),3,dpar);
254 // chamber type D, E and F (same size)
258 yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
259 yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
260 dpar[0] = (kXMAX/2.)*zRatio;
261 dpar[1] = kYMIN*zRatio;
263 detElementNumber = (10+icount+1)*100+2;
264 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[2], true, TGeoTranslation(xEnv,-yEnvM,kZm));
265 detElementNumber = (10+icount+1)*100+6;
266 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[6], true, TGeoTranslation(xEnv, yEnvM,kZm));
267 detElementNumber = (10+icount+1)*100+50+2;
268 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[11], true, TGeoTranslation(-xEnv,-yEnvP,kZp));
269 detElementNumber = (10+icount+1)*100+50+6;
270 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[15], true, TGeoTranslation(-xEnv, yEnvP,kZp));
272 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[2],iVolNum++,3, dpar);
273 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[6],iVolNum++,3, dpar);
274 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[11],iVolNum++,3, dpar);
275 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[15],iVolNum++,3, dpar);
280 yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
281 yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
283 detElementNumber = (10+icount+1)*100+1;
284 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[1], true, TGeoTranslation(xEnv,-yEnvP,kZp));
285 detElementNumber = (10+icount+1)*100+7;
286 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[7], true, TGeoTranslation(xEnv, yEnvP,kZp));
287 detElementNumber = (10+icount+1)*100+50+1;
288 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[10], true, TGeoTranslation(-xEnv,-yEnvM,kZm));
289 detElementNumber = (10+icount+1)*100+50+7;
290 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[16], true, TGeoTranslation(-xEnv, yEnvM,kZm));
292 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[1],iVolNum++,3,dpar);
293 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[7],iVolNum++,3,dpar);
294 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[10],iVolNum++,3,dpar);
295 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[16],iVolNum++,3,dpar);
301 yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
302 yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
304 detElementNumber = (10+icount+1)*100;
305 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[0], true, TGeoTranslation(xEnv,-yEnvM,kZm));
306 detElementNumber = (10+icount+1)*100+8;
307 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[8], true, TGeoTranslation(xEnv, yEnvM,kZm));
308 detElementNumber = (10+icount+1)*100+50;
309 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[9], true, TGeoTranslation(-xEnv,-yEnvP,kZp));
310 detElementNumber = (10+icount+1)*100+50+8;
311 GetChamber(10+icount)->GetGeometry()->AddEnvelope(volEnv[17], true, TGeoTranslation(-xEnv, yEnvP,kZp));
313 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[0],iVolNum++,3,dpar);
314 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[8],iVolNum++,3,dpar);
315 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[9],iVolNum++,3,dpar);
316 GetChamber(10+icount)->GetGeometry()->AddEnvelopeConstituentParam(volAlu,volEnv[17],iVolNum++,3,dpar);
318 } // end loop on detection planes
319 } // end loop on stations
322 //______________________________________________________________________________
323 void AliMUONTriggerGeometryBuilder::SetTransformations()
325 // Defines the transformations for the trigger chambers.
327 Double_t zpos1, zpos2;
328 AliMUONChamber *iChamber1, *iChamber2;
330 iChamber1 = GetChamber(10);
331 zpos1= - iChamber1->Z();
332 iChamber1->GetGeometry()
333 ->SetTranslation(TGeoTranslation(0., 0., zpos1));
335 iChamber2 = GetChamber(11);
336 zpos2 = - iChamber2->Z();
337 iChamber2->GetGeometry()
338 ->SetTranslation(TGeoTranslation(0., 0., zpos2));
340 iChamber1 = GetChamber(12);
341 zpos1 = - iChamber1->Z();
342 iChamber1->GetGeometry()
343 ->SetTranslation(TGeoTranslation(0., 0., zpos1));
345 iChamber2 = GetChamber(13);
346 zpos2 = - iChamber2->Z();
347 iChamber2->GetGeometry()
348 ->SetTranslation(TGeoTranslation(0., 0., zpos2));
351 //______________________________________________________________________________
352 void AliMUONTriggerGeometryBuilder::SetSensitiveVolumes()
354 // Defines the sensitive volumes for trigger station chambers.
357 GetChamber(10)->GetGeometry()->SetSensitiveVolume("SG1A");
358 GetChamber(11)->GetGeometry()->SetSensitiveVolume("SG2A");
359 GetChamber(12)->GetGeometry()->SetSensitiveVolume("SG3A");
360 GetChamber(13)->GetGeometry()->SetSensitiveVolume("SG4A");