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 Revision 1.8 2000/10/02 21:28:15 fca
19 Removal of useless dependecies via forward declarations
21 Revision 1.7 2000/06/11 12:37:25 morsch
22 Coding rule violations corrected
24 Revision 1.6 1999/09/29 09:24:30 fca
25 Introduction of the Copyright and cvs Log
29 ///////////////////////////////////////////////////////////////////////////////
35 <img src="picts/AliPIPEClass.gif">
39 ///////////////////////////////////////////////////////////////////////////////
41 #include "AliPIPEv1.h"
47 //_____________________________________________________________________________
48 AliPIPEv1::AliPIPEv1()
51 // Default constructor for beam pipe
55 //_____________________________________________________________________________
56 AliPIPEv1::AliPIPEv1(const char *name, const char *title)
60 // Standard constructor for beam pipe
64 //_____________________________________________________________________________
65 void AliPIPEv1::CreateGeometry()
68 // Create Beam Pipe geometry
72 <img src="picts/AliPIPE.gif">
77 <img src="picts/AliPIPETree.gif">
81 Float_t tpar[3], dzmo, zpos, absorberDistance, absorberEnd;
84 const Double_t kZFlange = 150;
86 Int_t *idtmed = fIdtmed->GetArray()-1999;
89 absorberDistance = 90.; // DEFINES DRIFT LENGTH
92 //theta1 = 24.; // 1. angle defining the front absorber
93 //theta2 = 5.; // 2. angle defining the front absorbe
94 //acc_max = 9.; // ANGLE POLAIRE MAXIMUM
95 //acc_min = 2.; // ANGLE POLAIRE MINIMUM DE DETECTION
97 //d_steel = 1.; // THICKNESS OF STEEL SUPPORT
100 //abs_cc = 315.; // DEFINES LENGTH OF CARBON
102 //abs_s = 150.; // DEFINES W-SHIELD LENGTH
103 //abs_n = 80.; // START OF NOSE
118 //zcone_e = 859.0875;
134 // the mother of all beam pipes
138 tpar[2] = (absorberDistance + 700.) / 2.;
139 dzmo = tpar[2] - absorberDistance;
140 gMC->Gsvolu("QQMO", "TUBE", idtmed[2015], tpar, 3);
141 gMC->Gspos("QQMO", 1, "ALIC", 0., 0., -dzmo, 0, "ONLY");
143 // BEAM PIPE IN DRIFT SPACE
149 gMC->Gsvolu("QDT1", "TUBE", idtmed[2015], tpar, 3);
152 gMC->Gsvolu("QTB1", "TUBE", idtmed[2004], tpar, 3);
153 gMC->Gspos("QTB1", 1, "QDT1", 0., 0., 0., 0, "ONLY");
154 gMC->Gspos("QDT1", 1, "QQMO", 0., 0., dzmo, 0, "ONLY");
161 gMC->Gsvolu("QDT2", "TUBE", idtmed[2015], tpar, 3);
164 gMC->Gsvolu("QTB2", "TUBE", idtmed[2004], tpar, 3);
165 gMC->Gspos("QTB2", 1, "QDT2", 0., 0., 0., 0, "ONLY");
166 gMC->Gspos("QDT2", 1, "QQMO", 0., 0., dzmo, 0, "ONLY");
168 // beam pipe outside absorber on the left side
175 tpar[2] = (kZFlange - 30)/2;
176 gMC->Gsvolu("QDT5", "TUBE", idtmed[2015], tpar, 3);
179 zpos = -30. - tpar[2] + dzmo;
180 gMC->Gsvolu("QTB5", "TUBE", idtmed[2004], tpar, 3);
181 gMC->Gspos("QTB5", 1, "QDT5", 0., 0., 0., 0, "ONLY");
182 gMC->Gspos("QDT5", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
184 // STRAIGHT STEEL PIECE
191 tpar[2] = (zpos + 700.) / 2.;
192 gMC->Gsvolu("QDT7", "TUBE", idtmed[2015], tpar, 3);
194 gMC->Gsvolu("QTB7", "TUBE", idtmed[2018], tpar, 3);
195 gMC->Gspos("QTB7", 1, "QDT7", 0., 0., 0., 0, "ONLY");
196 zpos = zpos - tpar[2] + dzmo;
197 gMC->Gspos("QDT7", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
204 gMC->Gsvolu("QN63", "TUBE", idtmed[2018], tpar, 3);
205 zpos = tpar[2] - kZFlange;
206 gMC->Gspos("QN63", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
209 // Replace Absorber or Shield by Beam-Pipe
210 // in case they are not selected
212 if (gAlice->GetModule("ABSO") == 0) {
214 gMC->Gspos("QN63", 2, "ALIC", 0., 0., kZFlange, 0, "ONLY");
219 tpar[2] = (kZFlange - absorberDistance) / 2.;
220 gMC->Gsvolu("QDT8", "TUBE", idtmed[2015], tpar, 3);
222 gMC->Gsvolu("QTB8", "TUBE", idtmed[2004], tpar, 3);
223 gMC->Gspos("QTB8", 1, "QDT8", 0., 0., 0., 0, "ONLY");
224 zpos = absorberDistance + tpar[2];
225 gMC->Gspos("QDT8", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
229 tpar[2] = (absorberEnd - kZFlange) / 2.;
230 gMC->Gsvolu("QDTS", "TUBE", idtmed[2015], tpar, 3);
232 gMC->Gsvolu("QTBS", "TUBE", idtmed[2018], tpar, 3);
233 gMC->Gspos("QTBS", 1, "QDTS", 0., 0., 0., 0, "ONLY");
234 zpos = tpar[2] + kZFlange;
235 gMC->Gspos("QDTS", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
237 if (gAlice->GetModule("SHIL") == 0) {
242 tpar[2] = (700. - absorberEnd) / 2.;
243 gMC->Gsvolu("QDT9", "TUBE", idtmed[2015], tpar, 3);
245 gMC->Gsvolu("QTB9", "TUBE", idtmed[2018], tpar, 3);
246 gMC->Gspos("QTB9", 1, "QDT9", 0., 0., 0., 0, "ONLY");
247 zpos = absorberEnd + tpar[2];
248 gMC->Gspos("QDT9", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
252 //_____________________________________________________________________________
253 void AliPIPEv1::DrawModule()
256 // Draw a shaded view of the Beam Pipe
259 // Set everything unseen
260 gMC->Gsatt("*", "seen", -1);
262 // Set ALIC mother transparent
263 gMC->Gsatt("ALIC","SEEN",0);
265 // Set the volumes visible
266 gMC->Gsatt("QQMO","seen",1);
267 gMC->Gsatt("QDT1","seen",1);
268 gMC->Gsatt("QTB1","seen",1);
269 gMC->Gsatt("QDT2","seen",1);
270 gMC->Gsatt("QTB2","seen",1);
271 gMC->Gsatt("QDT5","seen",1);
272 gMC->Gsatt("QTB5","seen",1);
273 gMC->Gsatt("QDT7","seen",1);
274 gMC->Gsatt("QTB7","seen",1);
275 gMC->Gsatt("QN63","seen",1);
277 gMC->Gdopt("hide", "on");
278 gMC->Gdopt("shad", "on");
279 gMC->Gsatt("*", "fill", 7);
280 gMC->SetClipBox(".");
281 gMC->SetClipBox("*", 0, 3000, -3000, 3000, -6000, 6000);
283 gMC->Gdraw("alic", 40, 30, 0, 3, 5, .04, .04);
284 gMC->Gdhead(1111, "Beam Pipe");
285 gMC->Gdman(16, 6, "MAN");
286 gMC->Gdopt("hide","off");
289 //_____________________________________________________________________________
290 void AliPIPEv1::CreateMaterials()
293 // Create materials for beam pipe
296 Int_t isxfld = gAlice->Field()->Integ();
297 Float_t sxmgmx = gAlice->Field()->Max();
299 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
300 Float_t zsteel[4] = { 26.,24.,28.,14. };
301 Float_t wsteel[4] = { .715,.18,.1,.005 };
303 Float_t epsil, stmin, tmaxfd, deemax, stemax;
308 // --- Define the various materials for GEANT ---
309 AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
310 AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
311 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500);
312 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
315 // Defines tracking media parameters.
316 // Les valeurs sont commentees pour laisser le defaut
317 // a GEANT (version 3-21, page CONS200), f.m.
318 epsil = .001; // Tracking precision,
319 stemax = -1.; // Maximum displacement for multiple scat
320 tmaxfd = -20.; // Maximum angle due to field deflection
321 deemax = -.3; // Maximum fractional energy loss, DLS
326 AliMedium(15, "AIR_L3_US", 15, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
330 AliMedium(5, "BE_L3_US", 5, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
334 AliMedium(16, "VA_L3_US", 16, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
338 AliMedium(19, "ST_L3_US", 19, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);