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 ///////////////////////////////////////////////////////////////////////////////
20 // Beam pipe class. Test version //
24 <img src="picts/AliPIPEClass.gif">
28 ///////////////////////////////////////////////////////////////////////////////
30 #include <TVirtualMC.h>
33 #include "AliPIPEv1.h"
38 //_____________________________________________________________________________
39 AliPIPEv1::AliPIPEv1()
42 // Default constructor for beam pipe
46 //_____________________________________________________________________________
47 AliPIPEv1::AliPIPEv1(const char *name, const char *title)
51 // Standard constructor for beam pipe
55 //_____________________________________________________________________________
56 void AliPIPEv1::CreateGeometry()
59 // Create Beam Pipe geometry
63 <img src="picts/AliPIPE.gif">
68 <img src="picts/AliPIPETree.gif">
72 Float_t tpar[3], dzmo, zpos, absorberDistance, absorberEnd;
75 const Double_t kZFlange = 150;
77 Int_t *idtmed = fIdtmed->GetArray()-1999;
80 absorberDistance = 90.; // DEFINES DRIFT LENGTH
83 //theta1 = 24.; // 1. angle defining the front absorber
84 //theta2 = 5.; // 2. angle defining the front absorbe
85 //acc_max = 9.; // ANGLE POLAIRE MAXIMUM
86 //acc_min = 2.; // ANGLE POLAIRE MINIMUM DE DETECTION
88 //d_steel = 1.; // THICKNESS OF STEEL SUPPORT
91 //abs_cc = 315.; // DEFINES LENGTH OF CARBON
93 //abs_s = 150.; // DEFINES W-SHIELD LENGTH
94 //abs_n = 80.; // START OF NOSE
109 //zcone_e = 859.0875;
125 // the mother of all beam pipes
129 tpar[2] = (absorberDistance + 700.) / 2.;
130 dzmo = tpar[2] - absorberDistance;
131 gMC->Gsvolu("QQMO", "TUBE", idtmed[2015], tpar, 3);
132 gMC->Gspos("QQMO", 1, "ALIC", 0., 0., -dzmo, 0, "ONLY");
134 // BEAM PIPE IN DRIFT SPACE
140 gMC->Gsvolu("QDT1", "TUBE", idtmed[2015], tpar, 3);
143 gMC->Gsvolu("QTB1", "TUBE", idtmed[2004], tpar, 3);
144 gMC->Gspos("QTB1", 1, "QDT1", 0., 0., 0., 0, "ONLY");
145 gMC->Gspos("QDT1", 1, "QQMO", 0., 0., dzmo, 0, "ONLY");
152 gMC->Gsvolu("QDT2", "TUBE", idtmed[2015], tpar, 3);
155 gMC->Gsvolu("QTB2", "TUBE", idtmed[2004], tpar, 3);
156 gMC->Gspos("QTB2", 1, "QDT2", 0., 0., 0., 0, "ONLY");
157 gMC->Gspos("QDT2", 1, "QQMO", 0., 0., dzmo, 0, "ONLY");
159 // beam pipe outside absorber on the left side
166 tpar[2] = (kZFlange - 30)/2;
167 gMC->Gsvolu("QDT5", "TUBE", idtmed[2015], tpar, 3);
170 zpos = -30. - tpar[2] + dzmo;
171 gMC->Gsvolu("QTB5", "TUBE", idtmed[2004], tpar, 3);
172 gMC->Gspos("QTB5", 1, "QDT5", 0., 0., 0., 0, "ONLY");
173 gMC->Gspos("QDT5", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
175 // STRAIGHT STEEL PIECE
182 tpar[2] = (zpos + 700.) / 2.;
183 gMC->Gsvolu("QDT7", "TUBE", idtmed[2015], tpar, 3);
185 gMC->Gsvolu("QTB7", "TUBE", idtmed[2018], tpar, 3);
186 gMC->Gspos("QTB7", 1, "QDT7", 0., 0., 0., 0, "ONLY");
187 zpos = zpos - tpar[2] + dzmo;
188 gMC->Gspos("QDT7", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
195 gMC->Gsvolu("QN63", "TUBE", idtmed[2018], tpar, 3);
196 zpos = tpar[2] - kZFlange;
197 gMC->Gspos("QN63", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
200 // Replace Absorber or Shield by Beam-Pipe
201 // in case they are not selected
203 if (gAlice->GetModule("ABSO") == 0) {
205 gMC->Gspos("QN63", 2, "ALIC", 0., 0., kZFlange, 0, "ONLY");
210 tpar[2] = (kZFlange - absorberDistance) / 2.;
211 gMC->Gsvolu("QDT8", "TUBE", idtmed[2015], tpar, 3);
213 gMC->Gsvolu("QTB8", "TUBE", idtmed[2004], tpar, 3);
214 gMC->Gspos("QTB8", 1, "QDT8", 0., 0., 0., 0, "ONLY");
215 zpos = absorberDistance + tpar[2];
216 gMC->Gspos("QDT8", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
220 tpar[2] = (absorberEnd - kZFlange) / 2.;
221 gMC->Gsvolu("QDTS", "TUBE", idtmed[2015], tpar, 3);
223 gMC->Gsvolu("QTBS", "TUBE", idtmed[2018], tpar, 3);
224 gMC->Gspos("QTBS", 1, "QDTS", 0., 0., 0., 0, "ONLY");
225 zpos = tpar[2] + kZFlange;
226 gMC->Gspos("QDTS", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
228 if (gAlice->GetModule("SHIL") == 0) {
233 tpar[2] = (700. - absorberEnd) / 2.;
234 gMC->Gsvolu("QDT9", "TUBE", idtmed[2015], tpar, 3);
236 gMC->Gsvolu("QTB9", "TUBE", idtmed[2018], tpar, 3);
237 gMC->Gspos("QTB9", 1, "QDT9", 0., 0., 0., 0, "ONLY");
238 zpos = absorberEnd + tpar[2];
239 gMC->Gspos("QDT9", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
243 //_____________________________________________________________________________
244 void AliPIPEv1::DrawModule() const
247 // Draw a shaded view of the Beam Pipe
250 // Set everything unseen
251 gMC->Gsatt("*", "seen", -1);
253 // Set ALIC mother transparent
254 gMC->Gsatt("ALIC","SEEN",0);
256 // Set the volumes visible
257 gMC->Gsatt("QQMO","seen",1);
258 gMC->Gsatt("QDT1","seen",1);
259 gMC->Gsatt("QTB1","seen",1);
260 gMC->Gsatt("QDT2","seen",1);
261 gMC->Gsatt("QTB2","seen",1);
262 gMC->Gsatt("QDT5","seen",1);
263 gMC->Gsatt("QTB5","seen",1);
264 gMC->Gsatt("QDT7","seen",1);
265 gMC->Gsatt("QTB7","seen",1);
266 gMC->Gsatt("QN63","seen",1);
268 gMC->Gdopt("hide", "on");
269 gMC->Gdopt("shad", "on");
270 gMC->Gsatt("*", "fill", 7);
271 gMC->SetClipBox(".");
272 gMC->SetClipBox("*", 0, 3000, -3000, 3000, -6000, 6000);
274 gMC->Gdraw("alic", 40, 30, 0, 3, 5, .04, .04);
275 gMC->Gdhead(1111, "Beam Pipe");
276 gMC->Gdman(16, 6, "MAN");
277 gMC->Gdopt("hide","off");
280 //_____________________________________________________________________________
281 void AliPIPEv1::CreateMaterials()
284 // Create materials for beam pipe
287 Int_t isxfld = gAlice->Field()->Integ();
288 Float_t sxmgmx = gAlice->Field()->Max();
290 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
291 Float_t zsteel[4] = { 26.,24.,28.,14. };
292 Float_t wsteel[4] = { .715,.18,.1,.005 };
294 Float_t epsil, stmin, tmaxfd, deemax, stemax;
299 // --- Define the various materials for GEANT ---
300 AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
301 AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
302 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500);
303 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
306 // Defines tracking media parameters.
307 // Les valeurs sont commentees pour laisser le defaut
308 // a GEANT (version 3-21, page CONS200), f.m.
309 epsil = .001; // Tracking precision,
310 stemax = -1.; // Maximum displacement for multiple scat
311 tmaxfd = -20.; // Maximum angle due to field deflection
312 deemax = -.3; // Maximum fractional energy loss, DLS
317 AliMedium(15, "AIR_L3_US", 15, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
321 AliMedium(5, "BE_L3_US", 5, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
325 AliMedium(16, "VA_L3_US", 16, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
329 AliMedium(19, "ST_L3_US", 19, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);