1 ///////////////////////////////////////////////////////////////////////////////
7 <img src="picts/AliPIPEClass.gif">
11 ///////////////////////////////////////////////////////////////////////////////
13 #include "AliPIPEv1.h"
19 //_____________________________________________________________________________
20 AliPIPEv1::AliPIPEv1()
23 // Default constructor for beam pipe
27 //_____________________________________________________________________________
28 AliPIPEv1::AliPIPEv1(const char *name, const char *title)
32 // Standard constructor for beam pipe
36 //_____________________________________________________________________________
37 void AliPIPEv1::CreateGeometry()
40 // Create Beam Pipe geometry
44 <img src="picts/AliPIPE.gif">
49 <img src="picts/AliPIPETree.gif">
53 Float_t tpar[3], dzmo, zpos, abs_d, abs_l;
56 const Double_t z_flange = 150;
58 Int_t *idtmed = fIdtmed->GetArray()-1999;
61 abs_d = 90.; // DEFINES DRIFT LENGTH
64 //theta1 = 24.; // 1. angle defining the front absorber
65 //theta2 = 5.; // 2. angle defining the front absorbe
66 //acc_max = 9.; // ANGLE POLAIRE MAXIMUM
67 //acc_min = 2.; // ANGLE POLAIRE MINIMUM DE DETECTION
69 //d_steel = 1.; // THICKNESS OF STEEL SUPPORT
72 //abs_cc = 315.; // DEFINES LENGTH OF CARBON
74 //abs_s = 150.; // DEFINES W-SHIELD LENGTH
75 //abs_n = 80.; // START OF NOSE
106 // the mother of all beam pipes
110 tpar[2] = (abs_d + 700.) / 2.;
111 dzmo = tpar[2] - abs_d;
112 gMC->Gsvolu("QQMO", "TUBE", idtmed[2015], tpar, 3);
113 gMC->Gspos("QQMO", 1, "ALIC", 0., 0., -dzmo, 0, "ONLY");
115 // BEAM PIPE IN DRIFT SPACE
121 gMC->Gsvolu("QDT1", "TUBE", idtmed[2015], tpar, 3);
124 gMC->Gsvolu("QTB1", "TUBE", idtmed[2004], tpar, 3);
125 gMC->Gspos("QTB1", 1, "QDT1", 0., 0., 0., 0, "ONLY");
126 gMC->Gspos("QDT1", 1, "QQMO", 0., 0., dzmo, 0, "ONLY");
133 gMC->Gsvolu("QDT2", "TUBE", idtmed[2015], tpar, 3);
136 gMC->Gsvolu("QTB2", "TUBE", idtmed[2004], tpar, 3);
137 gMC->Gspos("QTB2", 1, "QDT2", 0., 0., 0., 0, "ONLY");
138 gMC->Gspos("QDT2", 1, "QQMO", 0., 0., dzmo, 0, "ONLY");
140 // beam pipe outside absorber on the left side
147 tpar[2] = (z_flange - 30)/2;
148 gMC->Gsvolu("QDT5", "TUBE", idtmed[2015], tpar, 3);
151 zpos = -30. - tpar[2] + dzmo;
152 gMC->Gsvolu("QTB5", "TUBE", idtmed[2004], tpar, 3);
153 gMC->Gspos("QTB5", 1, "QDT5", 0., 0., 0., 0, "ONLY");
154 gMC->Gspos("QDT5", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
156 // STRAIGHT STEEL PIECE
163 tpar[2] = (zpos + 700.) / 2.;
164 gMC->Gsvolu("QDT7", "TUBE", idtmed[2015], tpar, 3);
166 gMC->Gsvolu("QTB7", "TUBE", idtmed[2018], tpar, 3);
167 gMC->Gspos("QTB7", 1, "QDT7", 0., 0., 0., 0, "ONLY");
168 zpos = zpos - tpar[2] + dzmo;
169 gMC->Gspos("QDT7", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
176 gMC->Gsvolu("QN63", "TUBE", idtmed[2018], tpar, 3);
177 zpos = tpar[2] - z_flange;
178 gMC->Gspos("QN63", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
181 // Replace Absorber or Shield by Beam-Pipe
182 // in case they are not selected
184 if (gAlice->GetModule("ABSO") == 0) {
186 gMC->Gspos("QN63", 2, "ALIC", 0., 0., z_flange, 0, "ONLY");
191 tpar[2] = (z_flange - abs_d) / 2.;
192 gMC->Gsvolu("QDT8", "TUBE", idtmed[2015], tpar, 3);
194 gMC->Gsvolu("QTB8", "TUBE", idtmed[2004], tpar, 3);
195 gMC->Gspos("QTB8", 1, "QDT8", 0., 0., 0., 0, "ONLY");
196 zpos = abs_d + tpar[2];
197 gMC->Gspos("QDT8", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
201 tpar[2] = (abs_l - z_flange) / 2.;
202 gMC->Gsvolu("QDTS", "TUBE", idtmed[2015], tpar, 3);
204 gMC->Gsvolu("QTBS", "TUBE", idtmed[2018], tpar, 3);
205 gMC->Gspos("QTBS", 1, "QDTS", 0., 0., 0., 0, "ONLY");
206 zpos = tpar[2] + z_flange;
207 gMC->Gspos("QDTS", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
209 if (gAlice->GetModule("SHIL") == 0) {
214 tpar[2] = (700. - abs_l) / 2.;
215 gMC->Gsvolu("QDT9", "TUBE", idtmed[2015], tpar, 3);
217 gMC->Gsvolu("QTB9", "TUBE", idtmed[2018], tpar, 3);
218 gMC->Gspos("QTB9", 1, "QDT9", 0., 0., 0., 0, "ONLY");
219 zpos = abs_l + tpar[2];
220 gMC->Gspos("QDT9", 1, "ALIC", 0., 0., zpos, 0, "ONLY");
224 //_____________________________________________________________________________
225 void AliPIPEv1::DrawModule()
228 // Draw a shaded view of the Beam Pipe
231 // Set everything unseen
232 gMC->Gsatt("*", "seen", -1);
234 // Set ALIC mother transparent
235 gMC->Gsatt("ALIC","SEEN",0);
237 // Set the volumes visible
238 gMC->Gsatt("QQMO","seen",1);
239 gMC->Gsatt("QDT1","seen",1);
240 gMC->Gsatt("QTB1","seen",1);
241 gMC->Gsatt("QDT2","seen",1);
242 gMC->Gsatt("QTB2","seen",1);
243 gMC->Gsatt("QDT5","seen",1);
244 gMC->Gsatt("QTB5","seen",1);
245 gMC->Gsatt("QDT7","seen",1);
246 gMC->Gsatt("QTB7","seen",1);
247 gMC->Gsatt("QN63","seen",1);
249 gMC->Gdopt("hide", "on");
250 gMC->Gdopt("shad", "on");
251 gMC->Gsatt("*", "fill", 7);
252 gMC->SetClipBox(".");
253 gMC->SetClipBox("*", 0, 3000, -3000, 3000, -6000, 6000);
255 gMC->Gdraw("alic", 40, 30, 0, 3, 5, .04, .04);
256 gMC->Gdhead(1111, "Beam Pipe");
257 gMC->Gdman(16, 6, "MAN");
258 gMC->Gdopt("hide","off");
261 //_____________________________________________________________________________
262 void AliPIPEv1::CreateMaterials()
265 // Create materials for beam pipe
268 Int_t ISXFLD = gAlice->Field()->Integ();
269 Float_t SXMGMX = gAlice->Field()->Max();
271 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
272 Float_t zsteel[4] = { 26.,24.,28.,14. };
273 Float_t wsteel[4] = { .715,.18,.1,.005 };
275 Float_t epsil, stmin, tmaxfd, deemax, stemax;
280 // --- Define the various materials for GEANT ---
281 AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
282 AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
283 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500);
284 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
287 // Defines tracking media parameters.
288 // Les valeurs sont commentees pour laisser le defaut
289 // a GEANT (version 3-21, page CONS200), f.m.
290 epsil = .001; // Tracking precision,
291 stemax = -1.; // Maximum displacement for multiple scat
292 tmaxfd = -20.; // Maximum angle due to field deflection
293 deemax = -.3; // Maximum fractional energy loss, DLS
298 AliMedium(15, "AIR_L3_US", 15, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
302 AliMedium(5, "BE_L3_US", 5, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
306 AliMedium(16, "VA_L3_US", 16, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
310 AliMedium(19, "ST_L3_US", 19, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);