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 1.7 2000/06/11 12:37:25 morsch
19 Coding rule violations corrected
21 Revision 1.6 1999/09/29 09:24:30 fca
22 Introduction of the Copyright and cvs Log
26 ///////////////////////////////////////////////////////////////////////////////
32 <img src="picts/AliPIPEClass.gif">
36 ///////////////////////////////////////////////////////////////////////////////
38 #include "AliPIPEv1.h"
45 //_____________________________________________________________________________
46 AliPIPEv1::AliPIPEv1()
49 // Default constructor for beam pipe
53 //_____________________________________________________________________________
54 AliPIPEv1::AliPIPEv1(const char *name, const char *title)
58 // Standard constructor for beam pipe
62 //_____________________________________________________________________________
63 void AliPIPEv1::CreateGeometry()
66 // Create Beam Pipe geometry
70 <img src="picts/AliPIPE.gif">
75 <img src="picts/AliPIPETree.gif">
79 Float_t tpar[3], dzmo, zpos, absorberDistance, absorberEnd;
82 const Double_t kZFlange = 150;
84 Int_t *idtmed = fIdtmed->GetArray()-1999;
87 absorberDistance = 90.; // DEFINES DRIFT LENGTH
90 //theta1 = 24.; // 1. angle defining the front absorber
91 //theta2 = 5.; // 2. angle defining the front absorbe
92 //acc_max = 9.; // ANGLE POLAIRE MAXIMUM
93 //acc_min = 2.; // ANGLE POLAIRE MINIMUM DE DETECTION
95 //d_steel = 1.; // THICKNESS OF STEEL SUPPORT
98 //abs_cc = 315.; // DEFINES LENGTH OF CARBON
100 //abs_s = 150.; // DEFINES W-SHIELD LENGTH
101 //abs_n = 80.; // START OF NOSE
116 //zcone_e = 859.0875;
132 // the mother of all beam pipes
136 tpar[2] = (absorberDistance + 700.) / 2.;
137 dzmo = tpar[2] - absorberDistance;
138 gMC->Gsvolu("QQMO", "TUBE", idtmed[2015], tpar, 3);
139 gMC->Gspos("QQMO", 1, "ALIC", 0., 0., -dzmo, 0, "ONLY");
141 // BEAM PIPE IN DRIFT SPACE
147 gMC->Gsvolu("QDT1", "TUBE", idtmed[2015], tpar, 3);
150 gMC->Gsvolu("QTB1", "TUBE", idtmed[2004], tpar, 3);
151 gMC->Gspos("QTB1", 1, "QDT1", 0., 0., 0., 0, "ONLY");
152 gMC->Gspos("QDT1", 1, "QQMO", 0., 0., dzmo, 0, "ONLY");
159 gMC->Gsvolu("QDT2", "TUBE", idtmed[2015], tpar, 3);
162 gMC->Gsvolu("QTB2", "TUBE", idtmed[2004], tpar, 3);
163 gMC->Gspos("QTB2", 1, "QDT2", 0., 0., 0., 0, "ONLY");
164 gMC->Gspos("QDT2", 1, "QQMO", 0., 0., dzmo, 0, "ONLY");
166 // beam pipe outside absorber on the left side
173 tpar[2] = (kZFlange - 30)/2;
174 gMC->Gsvolu("QDT5", "TUBE", idtmed[2015], tpar, 3);
177 zpos = -30. - tpar[2] + dzmo;
178 gMC->Gsvolu("QTB5", "TUBE", idtmed[2004], tpar, 3);
179 gMC->Gspos("QTB5", 1, "QDT5", 0., 0., 0., 0, "ONLY");
180 gMC->Gspos("QDT5", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
182 // STRAIGHT STEEL PIECE
189 tpar[2] = (zpos + 700.) / 2.;
190 gMC->Gsvolu("QDT7", "TUBE", idtmed[2015], tpar, 3);
192 gMC->Gsvolu("QTB7", "TUBE", idtmed[2018], tpar, 3);
193 gMC->Gspos("QTB7", 1, "QDT7", 0., 0., 0., 0, "ONLY");
194 zpos = zpos - tpar[2] + dzmo;
195 gMC->Gspos("QDT7", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
202 gMC->Gsvolu("QN63", "TUBE", idtmed[2018], tpar, 3);
203 zpos = tpar[2] - kZFlange;
204 gMC->Gspos("QN63", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
207 // Replace Absorber or Shield by Beam-Pipe
208 // in case they are not selected
210 if (gAlice->GetModule("ABSO") == 0) {
212 gMC->Gspos("QN63", 2, "ALIC", 0., 0., kZFlange, 0, "ONLY");
217 tpar[2] = (kZFlange - absorberDistance) / 2.;
218 gMC->Gsvolu("QDT8", "TUBE", idtmed[2015], tpar, 3);
220 gMC->Gsvolu("QTB8", "TUBE", idtmed[2004], tpar, 3);
221 gMC->Gspos("QTB8", 1, "QDT8", 0., 0., 0., 0, "ONLY");
222 zpos = absorberDistance + tpar[2];
223 gMC->Gspos("QDT8", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
227 tpar[2] = (absorberEnd - kZFlange) / 2.;
228 gMC->Gsvolu("QDTS", "TUBE", idtmed[2015], tpar, 3);
230 gMC->Gsvolu("QTBS", "TUBE", idtmed[2018], tpar, 3);
231 gMC->Gspos("QTBS", 1, "QDTS", 0., 0., 0., 0, "ONLY");
232 zpos = tpar[2] + kZFlange;
233 gMC->Gspos("QDTS", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
235 if (gAlice->GetModule("SHIL") == 0) {
240 tpar[2] = (700. - absorberEnd) / 2.;
241 gMC->Gsvolu("QDT9", "TUBE", idtmed[2015], tpar, 3);
243 gMC->Gsvolu("QTB9", "TUBE", idtmed[2018], tpar, 3);
244 gMC->Gspos("QTB9", 1, "QDT9", 0., 0., 0., 0, "ONLY");
245 zpos = absorberEnd + tpar[2];
246 gMC->Gspos("QDT9", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
250 //_____________________________________________________________________________
251 void AliPIPEv1::DrawModule()
254 // Draw a shaded view of the Beam Pipe
257 // Set everything unseen
258 gMC->Gsatt("*", "seen", -1);
260 // Set ALIC mother transparent
261 gMC->Gsatt("ALIC","SEEN",0);
263 // Set the volumes visible
264 gMC->Gsatt("QQMO","seen",1);
265 gMC->Gsatt("QDT1","seen",1);
266 gMC->Gsatt("QTB1","seen",1);
267 gMC->Gsatt("QDT2","seen",1);
268 gMC->Gsatt("QTB2","seen",1);
269 gMC->Gsatt("QDT5","seen",1);
270 gMC->Gsatt("QTB5","seen",1);
271 gMC->Gsatt("QDT7","seen",1);
272 gMC->Gsatt("QTB7","seen",1);
273 gMC->Gsatt("QN63","seen",1);
275 gMC->Gdopt("hide", "on");
276 gMC->Gdopt("shad", "on");
277 gMC->Gsatt("*", "fill", 7);
278 gMC->SetClipBox(".");
279 gMC->SetClipBox("*", 0, 3000, -3000, 3000, -6000, 6000);
281 gMC->Gdraw("alic", 40, 30, 0, 3, 5, .04, .04);
282 gMC->Gdhead(1111, "Beam Pipe");
283 gMC->Gdman(16, 6, "MAN");
284 gMC->Gdopt("hide","off");
287 //_____________________________________________________________________________
288 void AliPIPEv1::CreateMaterials()
291 // Create materials for beam pipe
294 Int_t isxfld = gAlice->Field()->Integ();
295 Float_t sxmgmx = gAlice->Field()->Max();
297 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
298 Float_t zsteel[4] = { 26.,24.,28.,14. };
299 Float_t wsteel[4] = { .715,.18,.1,.005 };
301 Float_t epsil, stmin, tmaxfd, deemax, stemax;
306 // --- Define the various materials for GEANT ---
307 AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
308 AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
309 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500);
310 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
313 // Defines tracking media parameters.
314 // Les valeurs sont commentees pour laisser le defaut
315 // a GEANT (version 3-21, page CONS200), f.m.
316 epsil = .001; // Tracking precision,
317 stemax = -1.; // Maximum displacement for multiple scat
318 tmaxfd = -20.; // Maximum angle due to field deflection
319 deemax = -.3; // Maximum fractional energy loss, DLS
324 AliMedium(15, "AIR_L3_US", 15, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
328 AliMedium(5, "BE_L3_US", 5, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
332 AliMedium(16, "VA_L3_US", 16, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
336 AliMedium(19, "ST_L3_US", 19, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);