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 1.16 2001/05/16 14:57:22 alibrary
19 New files for folders and Stack
21 Revision 1.15 2001/05/02 11:50:18 morsch
22 New layout of the non-absorber side provided by Y. Viyogi. Not the final design
23 but the prsent most realistic.
25 Revision 1.14 2001/01/20 16:56:33 morsch
26 Put air in connecting tubes and flanges of vacuum pump.
28 Revision 1.13 2001/01/20 16:35:27 morsch
29 Increase mother volume for bellows.
31 Revision 1.12 2000/12/21 16:41:06 morsch
32 Coding convention clean-up (RS3)
34 Revision 1.11 2000/11/28 16:06:57 morsch
35 Undulated beam-pipe replaced by Al-Be (40,60) pipe 1.5 mm thick.
37 Revision 1.10 2000/11/24 13:00:37 morsch
38 - Geometry and materials imported from euclid output
40 - better struturing of volume tree
41 - improved version of flange close to front absorber
42 - more realistic pump materials
43 - undulated beam pipe imported from v3.
45 Revision 1.9 2000/10/02 21:28:15 fca
46 Removal of useless dependecies via forward declarations
48 Revision 1.8 2000/06/11 12:37:01 morsch
49 Coding rule violations corrected
51 Revision 1.7 2000/02/23 16:25:24 fca
52 AliVMC and AliGeant3 classes introduced
53 ReadEuclid moved from AliRun to AliModule
55 Revision 1.6 1999/09/29 09:24:30 fca
56 Introduction of the Copyright and cvs Log
60 ////////////////////////////////////////////////
62 ////////////////////////////////////////////////
64 #include "AliPIPEv0.h"
75 //_____________________________________________________________________________
76 AliPIPEv0::AliPIPEv0()
81 //_____________________________________________________________________________
82 AliPIPEv0::AliPIPEv0(const char *name, const char *title)
89 //___________________________________________
90 void AliPIPEv0::CreateGeometry()
94 <img src="picts/pipe.gif">
101 <img src="picts/tree_pipe.gif">
105 if(fDebug) printf("%s: Create PIPEv0 geometry \n",ClassName());
108 Int_t *idtmed = fIdtmed->GetArray();
109 Float_t ppcon[84], ptube[3], pbox[3];
112 enum {kC=6, kAlu=9, kInox=19, kGetter=20, kBe=5, kVac=16, kAir=15, kAlBe=21};
115 AliMatrix(idrotm[2001],90.,240., 0., 0., 90.,150.);
116 AliMatrix(idrotm[2002],90., 0., 0., 0., 90.,270.);
117 AliMatrix(idrotm[2003],90.,120., 0., 0., 90., 30.);
118 AliMatrix(idrotm[2004],90.,315., 90., 45., 0., 0.);
119 AliMatrix(idrotm[2005],90.,270., 90., 0., 0., 0.);
120 AliMatrix(idrotm[2006],90.,225., 90.,315., 0., 0.);
121 AliMatrix(idrotm[2007],90.,180., 90.,270., 0., 0.);
122 AliMatrix(idrotm[2008],90.,135., 90.,225., 0., 0.);
123 AliMatrix(idrotm[2009],90., 90., 90.,180., 0., 0.);
124 AliMatrix(idrotm[2010],90., 45., 90.,135., 0., 0.);
126 AliMatrix(idrotm[2012],90.,180., 90., 90.,180., 0.);
127 AliMatrix(idrotm[2013],90., 0., 90., 90.,180., 0.);
129 // distance between bellows
130 const Float_t dzbb = 8.0;
132 const Float_t dzb = 11.4;
136 // The peam pipe up to the Front Absorber
138 // Mother Volume QBPM
139 const Float_t dbe1 = 15.;
140 const Float_t dbe2 = 15.;
157 ppcon[12] = - 81.6 + dzb;
161 ppcon[15] = - 81.6 + dzb;
165 ppcon[18] = - 81.6 + dzb + dzbb;
169 ppcon[21] = - 81.6 + dzb + dzbb;
173 ppcon[24] = - 28.00-dbe2;
177 ppcon[27] = - 28.00-dbe2;
185 ppcon[33] = 28.+dbe1;
189 ppcon[36] = 28.+dbe1;
193 ppcon[39] = 28.+dbe1+5.5;
197 ppcon[42] = 28.+dbe1+5.5;
209 ppcon[51] = 250.+4.4*2;
213 ppcon[54] = 250.+4.4*2;
245 gMC->Gsvolu("QBPM", "PCON", idtmed[kAir], ppcon, 78);
253 gMC->Gsvolu("QBVA","TUBE", idtmed[kVac], ptube, 3);
254 gMC->Gspos ("QBVA", 1, "QBPM", 0., 0., 355., 0, "ONLY");
256 // volume definitions of various sections
259 //half-lengths of various beam pipe sections
260 Float_t hlenQbbe = 43.3;
261 Float_t hlenQbt1 = 5.5/2.;
262 Float_t hlenQbab = (286.6+15.)/2.;
263 Float_t hlenQb10 = (286.6+15.)/2.;
264 Float_t hlenQb29 = 4.4/2.;
265 Float_t hlenQbe0 = (2.* dzb + dzbb)/2.;
266 Float_t hlenQb26 = 20./2.;
267 Float_t hlenQb28 = (400.6-15.)/2.;
269 // Be Pipe in central Alice : length 43.3 * 2
274 gMC->Gsvolu("QBBE","TUBE", idtmed[kBe], ptube, 3);
277 // Metal-Metal Transitions : non-absorber side
279 // Be-Al (or Be to Be-Al alloy)
284 gMC->Gsvolu("QBT1","TUBE", idtmed[kAir], ptube, 3);
291 gMC->Gsvolu("QB01","TUBE", idtmed[kAlu], ptube, 3);
294 gMC->Gsvolu("QBA1","TUBE", idtmed[kBe], ptube, 3);
296 gMC->Gspos("QBA1", 1, "QB01", 0., 0., 0, 0, "ONLY");
297 gMC->Gspos("QB01", 1, "QBT1", 0., 0.,-2.75+ptube[2], 0, "ONLY");
305 gMC->Gsvolu("QB03","TUBE", idtmed[kAlu], ptube, 3);
306 gMC->Gspos("QB03", 1, "QBT1", 0., 0.,-2.+ptube[2], 0, "ONLY");
313 gMC->Gsvolu("QB05","TUBE", idtmed[kAlu], ptube, 3);
314 gMC->Gspos("QB05", 1, "QBT1", 0., 0., 2.55+ptube[2], 0, "ONLY");
322 gMC->Gsvolu("QB08","TUBE", idtmed[kInox], ptube, 3);
323 gMC->Gspos("QB08", 1 ,"QBT1", 0.000, 3.650, -1.25, idrotm[2002], "ONLY");
324 gMC->Gspos("QB08", 2 ,"QBT1", 3.161, -1.825, -1.25, idrotm[2001], "ONLY");
325 gMC->Gspos("QB08", 3 ,"QBT1", -3.161, -1.825, -1.25, idrotm[2003], "ONLY");
332 gMC->Gsvolu("QB07","TUBE", idtmed[kC], ptube, 3);
337 gMC->Gsvolu("QBA7","TUBE", idtmed[kInox], ptube, 3);
338 gMC->Gspos("QBA7", 1, "QB07", 0.0, 0.0, 0.55-0.2, 0, "ONLY");
339 gMC->Gspos("QB07", 1, "QBT1", 0.0, 0.0, 2., 0, "ONLY");
343 // 1st section Alu non-absorber side
348 gMC->Gsvolu("QB10","TUBE", idtmed[kAlu], ptube, 3);
350 // Support rollers: non absorber side
357 gMC->Gsvolu("QBRM","TUBE", idtmed[kAir], ptube, 3);
363 gMC->Gsvolu("QB30","TUBE", idtmed[kInox], ptube, 3);
365 for (i=0; i<8; i++) {
366 Float_t phi = 45.+i*45.*kDegrad;
367 Float_t xpos = 4.*TMath::Sin(phi);
368 Float_t ypos = 4.*TMath::Cos(phi);
369 gMC->Gspos("QB30", i+1, "QBRM", xpos, ypos, 0, idrotm[2004+i], "ONLY");
373 // Flanges: non absorber side
378 gMC->Gsvolu("QB29","TUBE", idtmed[kInox], ptube, 3);
381 // Inox beam pipe: final section on non-absorber side
387 gMC->Gsvolu("QB28","TUBE", idtmed[kInox], ptube, 3);
390 // Undulated beam pipe
397 char cn48[][5]={"QN21","QN22","QN23","QN24","QN25","QN26","QN27","QN28"};
399 Undulation("QUND",pitch,thick,zundul,rundul,cn48);
400 gMC->Gspos("QUND", 1, "QBPM", 0., 0., 335.+zundul, 0, "ONLY");
403 // Al-Be (40-60 wgt%, rho=2.7 g/cm**3) beam pipe
409 gMC->Gsvolu("QBAB","TUBE", idtmed[kAlBe], ptube, 3);
413 // last piece : inox pipe from pump till end
419 //gMC->Gsvolu("QB48","TUBE", idtmed[kInox], ptube, 3);
426 gMC->Gsvolu("QB27","TUBE", idtmed[kInox], ptube, 3);
427 gMC->Gspos("QB27", 1, "QBPM", 0.0, 0.0, 208.1, 0, "ONLY");
430 // Aluminium collar for support rollers
432 gMC->Gsvolu("QB25","TUBE", idtmed[kAlu], ptube, 0);
435 // 2.5 mm thick SS tube for hanging pump
440 gMC->Gsvolu("QB26","TUBE", idtmed[kInox], ptube, 3);
448 Float_t pconQBE0[21];
453 pconQBE0[3]= -(2.*dzb+dzbb)/2.;
457 pconQBE0[6]= -(2.*dzb+dzbb)/2.+dzb;
461 pconQBE0[9]= -(2.*dzb+dzbb)/2.+dzb;
465 pconQBE0[12]= -(2.*dzb+dzbb)/2.+dzb+dzbb;
469 pconQBE0[15]= -(2.*dzb+dzbb)/2.+dzb+dzbb;
473 pconQBE0[18]= -(2.*dzb+dzbb)/2.+dzb+dzbb+dzb;
477 gMC->Gsvolu("QBE0", "PCON", idtmed[kAir], pconQBE0, 21);
483 gMC->Gsvolu("QBEM","TUBE", idtmed[kAir], ptube, 3);
484 Float_t dz = (dzb+dzbb)/2.;
485 gMC->Gspos("QBEM", 2 ,"QBE0", 0.0, 0.0, -dz, 0 , "ONLY");
486 gMC->Gspos("QBEM", 1 ,"QBE0", 0.0, 0.0, dz, idrotm[2012], "ONLY");
492 gMC->Gsvolu("QB19","TUBE", idtmed[kVac], ptube, 3);
493 gMC->Gspos("QB19", 1 ,"QBEM", 0.0, 0.0, 0.5, 0 , "ONLY");
499 gMC->Gsvolu("QB18","TUBE", idtmed[kVac], ptube, 3);
500 for (i=0; i<15; i++) {
501 gMC->Gspos("QB18", i+1, "QBEM", 0.0, 0.0, 3.3-i*0.4, 0, "ONLY");
508 gMC->Gsvolu("QB21","TUBE", idtmed[kVac], ptube, 3);
509 gMC->Gspos("QB21", 1 ,"QBEM", 0.0, 0.0, -4.5, 0 , "ONLY");
515 gMC->Gsvolu("QB15","TUBE", idtmed[kInox], ptube, 3);
516 for (i=0; i<30; i++) {
517 gMC->Gspos("QB15", i+1, "QBEM", 0.0, 0.0, 3.4-i*0.2, 0, "ONLY");
524 gMC->Gsvolu("QB16","TUBE", idtmed[kInox], ptube, 3);
525 for (i=0; i<15; i++) {
526 gMC->Gspos("QB16", i+1, "QBEM", 0.0, 0.0, 3.3-i*0.4, 0, "ONLY");
533 gMC->Gsvolu("QB17","TUBE", idtmed[kInox], ptube, 3);
534 for (i=0; i<14; i++) {
535 gMC->Gspos("QB17", i+1, "QBEM", 0.0, 0.0, 3.1-i*0.4, 0, "ONLY");
542 gMC->Gsvolu("QB14","TUBE", idtmed[kInox], ptube, 3);
543 gMC->Gspos("QB14", 2 ,"QBEM", 0.0, 0.0, -2.8025, 0 , "ONLY");
544 gMC->Gspos("QB14", 1 ,"QBEM", 0.0, 0.0, 3.8025, 0 , "ONLY");
550 gMC->Gsvolu("QB13","TUBE", idtmed[kInox], ptube, 3);
551 gMC->Gspos("QB13", 2 ,"QBEM", 0.0, 0.0, -3.25, 0 , "ONLY");
552 gMC->Gspos("QB13", 1 ,"QBEM", 0.0, 0.0, 4.25, 0 , "ONLY");
558 gMC->Gsvolu("QB12","TUBE", idtmed[kInox], ptube, 3);
559 gMC->Gspos("QB12", 1 ,"QBEM", 0.0, 0.0, 5.0, 0, "ONLY");
563 // pipe between Bellows
567 gMC->Gsvolu("QB23","TUBE", idtmed[kInox], ptube, 3);
568 gMC->Gspos("QB23", 1 ,"QBE0", 0.0, 0.0, 0.0, 0, "ONLY");
573 // **** placement of various sections on non-absorber side ****
575 // first the beryllium section : 43.3 cm long on both sides of IP
576 // zstart=0, zend=43.3, length=43.3 on one side
578 gMC->Gspos("QBBE", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
580 // next meta-metal transition QBT1 on on-absorber side
581 // zstart=43.3, zend=48.8, length=5.5
582 zpos = zpos + hlenQbbe + hlenQbt1;
583 gMC->Gspos("QBT1", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
585 // Aluminium OR Al-be alloy section
586 //zpos=zpos + hlenQbt1 + hlenQb10;
587 //gMC->Gspos("QB10", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
588 // zstart= 48.8, zend=335.4, length=286.6
589 zpos = zpos + hlenQbt1 + hlenQbab;
590 gMC->Gspos("QBAB", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
592 // inox flange at the start of bellow
593 // zstart=335.4, zend=339.8, length=4.4
594 cout<<" zpos 1 "<<zpos<<" hlenQbab "<<hlenQbab<<
595 " hlenQb29 "<< hlenQb29<<endl;
596 zpos = zpos + hlenQbab + hlenQb29;
597 cout<<" zstart 1 "<<zpos-hlenQb29<<" zend 2 "<<zpos+hlenQb29<<endl;
598 gMC->Gspos("QB29", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
601 // zstart=339.8, zend=370.6, length=30.9
602 // zpos = zpos + hlenQb29 + hlenQbe0;
603 zpos = zpos + hlenQb29 + hlenQbe0;
604 cout<<" zstart "<<zpos-hlenQbe0<<" zend "<<zpos-hlenQbe0<<endl;
605 gMC->Gspos("QBE0", 2 ,"QBPM", 0.0, 0.0, zpos, 0, "ONLY");
607 // inox flange at the end of bellow and start of thick inox for pump
608 // zstart=370.6, zend=375.0, length=4.4
609 zpos = zpos + hlenQbe0 + hlenQb29;
610 cout<<" zstart 1 "<<zpos-hlenQb29<<" zend 2 "<<zpos+hlenQb29<<endl;
611 gMC->Gspos("QB29", 2, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
613 // 2.5mm thick inox section to hang the pump
614 // zstart=375.0, zend=395.0, length=20.0
615 zpos = zpos + hlenQb29 + hlenQb26;
616 cout<<" zstart 1 "<<zpos-hlenQb29<<" zend 2 "<<zpos+hlenQb29<<endl;
617 gMC->Gspos("QB26", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
619 //inox flange at the end of pump section to join to next pipe
620 // zstart=395.0, zend=399.4, length=4.4
621 zpos = zpos + hlenQb26 + hlenQb29;
622 gMC->Gspos("QB29", 3, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
624 //last inox section till 800 cm
625 // zstart=399.4, zend=800., length=400.6
626 zpos = zpos + hlenQb29 + hlenQb28;
627 gMC->Gspos("QB28", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
630 // aluminium collars and support rollers at two places
636 gMC->Gsposp("QB25", 1, "QBPM", 0., 0., 654.8, 0, "ONLY", ptube, 3);
637 gMC->Gspos("QBRM", 1, "QBPM", 0., 0., 654.8, 0, "ONLY");
641 gMC->Gsposp("QB25", 2, "QBPM", 0., 0., 254.8, 0, "ONLY", ptube, 3);
642 gMC->Gspos("QBRM", 2, "QBPM", 0., 0., 254.8, 0, "ONLY");
646 //******** end of placement on no-absorber side *********
649 // **** Absorber side *****
652 // metal-metal transition : Be-Alu on absorber side
657 gMC->Gsvolu("QBT2","TUBE", idtmed[kAir], ptube, 3);
659 gMC->Gspos("QBT2", 1, "QBPM", 0., 0., -hlenQbbe-ptube[2], idrotm[2012], "ONLY");
666 gMC->Gsvolu("QB02","TUBE", idtmed[kAlu], ptube, 3);
669 gMC->Gsvolu("QBA2","TUBE", idtmed[kBe], ptube, 3);
671 gMC->Gspos("QBA2", 1, "QB02", 0., 0., 0, 0, "ONLY");
672 // z = -2.75 -> -2.00
673 gMC->Gspos("QB02", 1, "QBT2", 0., 0.,-2.75+ptube[2], 0, "ONLY");
680 gMC->Gsvolu("QB04","TUBE", idtmed[kAlu], ptube, 3);
681 gMC->Gspos("QB04", 1, "QBT2", 0., 0.,-2.+ptube[2], 0, "ONLY");
688 gMC->Gsvolu("QB06","TUBE", idtmed[kAlu], ptube, 3);
689 gMC->Gspos("QB06", 1, "QBT2", 0., 0., 2.55+ptube[2], 0, "ONLY");
697 gMC->Gsvolu("QBA8","TUBE", idtmed[kInox], ptube, 3);
698 gMC->Gspos("QBA8", 1 ,"QBT2", 0.000, 3.650, -1.25, idrotm[2002], "ONLY");
699 gMC->Gspos("QBA8", 2 ,"QBT2", 3.161, -1.825, -1.25, idrotm[2001], "ONLY");
700 gMC->Gspos("QBA8", 3 ,"QBT2", -3.161, -1.825, -1.25, idrotm[2003], "ONLY");
707 gMC->Gsvolu("QB77","TUBE", idtmed[kC], ptube, 3);
712 gMC->Gsvolu("QBB7","TUBE", idtmed[kInox], ptube, 3);
713 gMC->Gspos("QBB7", 1, "QB77", 0.0, 0.0, 0.55-0.2, 0, "ONLY");
714 gMC->Gspos("QB77", 1, "QBT2", 0.0, 0.0, 2., 0, "ONLY");
717 // beam pipe between metal-metal transition and bellows
720 ptube[2] = (81.7-(2.*dzb+dzbb)-(hlenQbbe+5.5))/2.;
723 gMC->Gsvolu("QB24","TUBE", idtmed[kInox], ptube, 3);
725 dz = (hlenQbbe+5.5)+ptube[2];
726 gMC->Gspos("QB24", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
728 // beam pipe between flange and bellows
733 gMC->Gsvolu("QB22","TUBE", idtmed[kInox], ptube, 3);
734 gMC->Gspos("QB22", 1 ,"QBPM", 0.0, 0.0, -82.15, 0, "ONLY");
744 gMC->Gsvolu("QFA0","TUBE", idtmed[kAlu], ptube, 3);
745 gMC->Gspos("QFA0", 1 ,"QBPM", 0.0, 0.0, -84.0, 0, "ONLY");
751 gMC->Gsvolu("QFA1","TUBE", idtmed[kInox], ptube, 3);
752 gMC->Gspos("QFA1", 1 ,"QFA0", 0.0, 0.0, 0.225, 0, "ONLY");
758 gMC->Gsvolu("QFA2","TUBE", idtmed[kInox], ptube, 3);
759 for (i=0; i<8; i++) {
760 Float_t phi = i*45.*kDegrad;
761 Float_t xpos = 3.9*TMath::Sin(phi);
762 Float_t ypos = 3.9*TMath::Cos(phi);
763 gMC->Gspos("QFA2", i+1, "QFA0", xpos, ypos, 0., 0, "ONLY");
771 gMC->Gsvolu("QB32","TUBE", idtmed[kInox], ptube, 3);
772 gMC->Gspos("QB32", 1 ,"QBPM", 0.0, 0.0, -90.+2.3, 0, "ONLY");
774 //bellow on absorber side
775 ptube[2] = (2.*dzb+dzbb)/2.;
776 dz = (81.7-ptube[2]);
777 gMC->Gspos("QBE0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
780 // --- Place the PIPE ghost volume (QBPM) in its mother volume (ALIC)
781 // by rotating it to 180 deg. and make it invisible
785 gMC->Gspos("QBPM",1,"ALIC",0,0,0,idrotm[2013], "ONLY");
789 // ******** Ion Pump volume description starts here ******
796 gMC->Gsvolu("QI32","BOX", idtmed[kInox], pbox, 3);
801 gMC->Gsvolu("QI42","BOX", idtmed[kGetter], pbox, 3);
802 gMC->Gspos("QI42", 1, "QI32", 0.0, 0.0, 0.0, 0, "ONLY");
808 gMC->Gsvolu("QI33","TUBE", idtmed[kInox], ptube, 3);
814 gMC->Gsvolu("QI43","TUBE", idtmed[kAir], ptube, 3);
815 gMC->Gspos("QI43", 1, "QI33", 0.0, 0.0, 0.0, 0, "ONLY");
817 // Connecting tube ->
821 gMC->Gsvolu("QI34","TUBE", idtmed[kInox], ptube, 3);
826 gMC->Gsvolu("QI44","TUBE", idtmed[kAir], ptube, 3);
827 gMC->Gspos("QI44", 1, "QI34", 0.0, 0.0, 0.0, 0, "ONLY");
835 gMC->Gsvolu("QI35","TUBE", idtmed[kInox], ptube, 3);
837 Float_t zPump = 400.;
838 gMC->Gspos("QI32", 1, "QBPM", 0.0, -44.25, zPump, 0, "ONLY");
839 gMC->Gspos("QI33", 1, "QBPM", 0.0, -35.00, zPump,idrotm[2002], "ONLY");
840 gMC->Gspos("QI34", 1, "QBPM", 0.0, -17.90, zPump,idrotm[2002], "ONLY");
841 gMC->Gspos("QI35", 1, "QBPM", 0.0, -24.35, zPump,idrotm[2002], "ONLY");
843 gMC->Gsatt("QBPM", "SEEN", 1);
844 gMC->Gsatt("QBEM", "SEEN", 1);
849 //___________________________________________
850 void AliPIPEv0::CreateMaterials()
853 // Define materials for beam pipe
856 if(fDebug) printf("%s: Create PIPEv0 materials \n",ClassName());
857 Int_t isxfld = gAlice->Field()->Integ();
858 Float_t sxmgmx = gAlice->Field()->Max();
860 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
861 Float_t zsteel[4] = { 26.,24.,28.,14. };
862 Float_t wsteel[4] = { .715,.18,.1,.005 };
864 Float_t aAlBe[2] = { 26.98, 9.01};
865 Float_t zAlBe[2] = { 13.00, 4.00};
866 Float_t wAlBe[2] = { 0.4, 0.6};
870 AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
873 AliMaterial(6, "CARBON$ ", 12.01, 6., 2.265, 18.8, 49.9);
876 AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
879 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
882 AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
885 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
887 // reduced density steel to approximate pump getter material
888 AliMixture(20, "GETTER$", asteel, zsteel, 1.00, 4, wsteel);
891 AliMixture(21, "AlBe$", aAlBe, zAlBe, 2.07, 2, wAlBe);
894 // Defines tracking media parameters.
896 Float_t epsil = .001; // Tracking precision,
897 Float_t stemax = -0.01; // Maximum displacement for multiple scat
898 Float_t tmaxfd = -20.; // Maximum angle due to field deflection
899 Float_t deemax = -.3; // Maximum fractional energy loss, DLS
905 AliMedium(5, "BE", 5, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
908 AliMedium(6, "C", 6, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
911 AliMedium(9, "ALU", 9, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
914 AliMedium(15, "AIR", 15, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
917 AliMedium(16, "VACUUM", 16, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
920 AliMedium(19, "INOX", 19, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
923 AliMedium(20, "GETTER", 20, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
926 AliMedium(21, "AlBe" , 21, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);