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 1.18 2002/02/01 18:02:41 morsch
19 Material of beam pipe between inner Be piece and forward detectors
20 can be set by SetPipeMaterial(mat), mat = kInox, kAlu, kBe ...
22 Revision 1.17 2001/09/24 13:11:50 morsch
23 Ion pump and bellows moved out by 15 cm to make space for forward
26 Revision 1.16 2001/05/16 14:57:22 alibrary
27 New files for folders and Stack
29 Revision 1.15 2001/05/02 11:50:18 morsch
30 New layout of the non-absorber side provided by Y. Viyogi. Not the final design
31 but the prsent most realistic.
33 Revision 1.14 2001/01/20 16:56:33 morsch
34 Put air in connecting tubes and flanges of vacuum pump.
36 Revision 1.13 2001/01/20 16:35:27 morsch
37 Increase mother volume for bellows.
39 Revision 1.12 2000/12/21 16:41:06 morsch
40 Coding convention clean-up (RS3)
42 Revision 1.11 2000/11/28 16:06:57 morsch
43 Undulated beam-pipe replaced by Al-Be (40,60) pipe 1.5 mm thick.
45 Revision 1.10 2000/11/24 13:00:37 morsch
46 - Geometry and materials imported from euclid output
48 - better struturing of volume tree
49 - improved version of flange close to front absorber
50 - more realistic pump materials
51 - undulated beam pipe imported from v3.
53 Revision 1.9 2000/10/02 21:28:15 fca
54 Removal of useless dependecies via forward declarations
56 Revision 1.8 2000/06/11 12:37:01 morsch
57 Coding rule violations corrected
59 Revision 1.7 2000/02/23 16:25:24 fca
60 AliVMC and AliGeant3 classes introduced
61 ReadEuclid moved from AliRun to AliModule
63 Revision 1.6 1999/09/29 09:24:30 fca
64 Introduction of the Copyright and cvs Log
68 ////////////////////////////////////////////////
70 ////////////////////////////////////////////////
72 #include "AliPIPEv0.h"
83 //_____________________________________________________________________________
84 AliPIPEv0::AliPIPEv0()
90 //_____________________________________________________________________________
91 AliPIPEv0::AliPIPEv0(const char *name, const char *title)
99 //___________________________________________
100 void AliPIPEv0::CreateGeometry()
104 <img src="picts/pipe.gif">
111 <img src="picts/tree_pipe.gif">
115 if(fDebug) printf("%s: Create PIPEv0 geometry \n",ClassName());
118 Int_t *idtmed = fIdtmed->GetArray();
119 Float_t ppcon[84], ptube[3], pbox[3];
124 AliMatrix(idrotm[2001],90.,240., 0., 0., 90.,150.);
125 AliMatrix(idrotm[2002],90., 0., 0., 0., 90.,270.);
126 AliMatrix(idrotm[2003],90.,120., 0., 0., 90., 30.);
127 AliMatrix(idrotm[2004],90.,315., 90., 45., 0., 0.);
128 AliMatrix(idrotm[2005],90.,270., 90., 0., 0., 0.);
129 AliMatrix(idrotm[2006],90.,225., 90.,315., 0., 0.);
130 AliMatrix(idrotm[2007],90.,180., 90.,270., 0., 0.);
131 AliMatrix(idrotm[2008],90.,135., 90.,225., 0., 0.);
132 AliMatrix(idrotm[2009],90., 90., 90.,180., 0., 0.);
133 AliMatrix(idrotm[2010],90., 45., 90.,135., 0., 0.);
135 AliMatrix(idrotm[2012],90.,180., 90., 90.,180., 0.);
136 AliMatrix(idrotm[2013],90., 0., 90., 90.,180., 0.);
138 // distance between bellows
139 const Float_t dzbb = 8.0;
141 const Float_t dzb = 11.4;
145 // The peam pipe up to the Front Absorber
147 // Mother Volume QBPM
148 const Float_t dbe1 = 15.;
149 const Float_t dbe2 = 15.;
166 ppcon[12] = - 81.6 + dzb;
170 ppcon[15] = - 81.6 + dzb;
174 ppcon[18] = - 81.6 + dzb + dzbb;
178 ppcon[21] = - 81.6 + dzb + dzbb;
182 ppcon[24] = - 28.00-dbe2;
186 ppcon[27] = - 28.00-dbe2;
194 ppcon[33] = 28.+dbe1;
198 ppcon[36] = 28.+dbe1;
202 ppcon[39] = 28.+dbe1+6.0;
206 ppcon[42] = 28.+dbe1+6.0;
218 ppcon[51] = 250.+4.4*2;
222 ppcon[54] = 250.+4.4*2;
254 gMC->Gsvolu("QBPM", "PCON", idtmed[kAir], ppcon, 78);
262 gMC->Gsvolu("QBVA","TUBE", idtmed[kVac], ptube, 3);
263 gMC->Gspos ("QBVA", 1, "QBPM", 0., 0., 355., 0, "ONLY");
265 // volume definitions of various sections
268 //half-lengths of various beam pipe sections
269 Float_t hlenQbbe = 43.3;
270 Float_t hlenQbt1 = 5.5/2.;
271 Float_t hlenQbab = (286.6+30.)/2.;
272 Float_t hlenQb29 = 4.4/2.;
273 Float_t hlenQbe0 = (2.* dzb + dzbb)/2.;
274 Float_t hlenQb26 = 20./2.;
275 Float_t hlenQb28 = (400.6-30.)/2.;
277 // Be Pipe in central Alice : length 43.3 * 2
282 gMC->Gsvolu("QBBE","TUBE", idtmed[kBe], ptube, 3);
285 // Metal-Metal Transitions : non-absorber side
287 // Be-Al (or Be to Be-Al alloy)
292 gMC->Gsvolu("QBT1","TUBE", idtmed[kAir], ptube, 3);
299 gMC->Gsvolu("QB01","TUBE", idtmed[kAlu], ptube, 3);
302 gMC->Gsvolu("QBA1","TUBE", idtmed[kBe], ptube, 3);
304 gMC->Gspos("QBA1", 1, "QB01", 0., 0., 0, 0, "ONLY");
305 gMC->Gspos("QB01", 1, "QBT1", 0., 0.,-2.75+ptube[2], 0, "ONLY");
313 gMC->Gsvolu("QB03","TUBE", idtmed[kAlu], ptube, 3);
314 gMC->Gspos("QB03", 1, "QBT1", 0., 0.,-2.+ptube[2], 0, "ONLY");
321 gMC->Gsvolu("QB05","TUBE", idtmed[kAlu], ptube, 3);
322 gMC->Gspos("QB05", 1, "QBT1", 0., 0., 2.55+ptube[2], 0, "ONLY");
330 gMC->Gsvolu("QB08","TUBE", idtmed[kInox], ptube, 3);
331 gMC->Gspos("QB08", 1 ,"QBT1", 0.000, 3.650, -1.25, idrotm[2002], "ONLY");
332 gMC->Gspos("QB08", 2 ,"QBT1", 3.161, -1.825, -1.25, idrotm[2001], "ONLY");
333 gMC->Gspos("QB08", 3 ,"QBT1", -3.161, -1.825, -1.25, idrotm[2003], "ONLY");
340 gMC->Gsvolu("QB07","TUBE", idtmed[kC], ptube, 3);
345 gMC->Gsvolu("QBA7","TUBE", idtmed[kInox], ptube, 3);
346 gMC->Gspos("QBA7", 1, "QB07", 0.0, 0.0, 0.55-0.2, 0, "ONLY");
347 gMC->Gspos("QB07", 1, "QBT1", 0.0, 0.0, 2., 0, "ONLY");
351 // Support rollers: non absorber side
358 gMC->Gsvolu("QBRM","TUBE", idtmed[kAir], ptube, 3);
364 gMC->Gsvolu("QB30","TUBE", idtmed[kInox], ptube, 3);
366 for (i=0; i<8; i++) {
367 Float_t phi = 45.+i*45.*kDegrad;
368 Float_t xpos = 4.*TMath::Sin(phi);
369 Float_t ypos = 4.*TMath::Cos(phi);
370 gMC->Gspos("QB30", i+1, "QBRM", xpos, ypos, 0, idrotm[2004+i], "ONLY");
374 // Flanges: non absorber side
379 gMC->Gsvolu("QB29","TUBE", idtmed[kInox], ptube, 3);
382 // Inox beam pipe: final section on non-absorber side
388 gMC->Gsvolu("QB28","TUBE", idtmed[kInox], ptube, 3);
391 // Undulated beam pipe
398 char cn48[][5]={"QN21","QN22","QN23","QN24","QN25","QN26","QN27","QN28"};
400 Undulation("QUND",pitch,thick,zundul,rundul,cn48);
401 gMC->Gspos("QUND", 1, "QBPM", 0., 0., 335.+zundul, 0, "ONLY");
404 // Al-Be (40-60 wgt%, rho=2.7 g/cm**3) beam pipe
406 // This section is under study (A.M. 1/2/2002)
410 if (fPipeMaterial == kAlu) {
412 } else if (fPipeMaterial == kBe) {
414 } else if (fPipeMaterial == kInox){
419 gMC->Gsvolu("QBAB","TUBE", idtmed[fPipeMaterial], ptube, 3);
423 // last piece : inox pipe from pump till end
429 //gMC->Gsvolu("QB48","TUBE", idtmed[kInox], ptube, 3);
436 gMC->Gsvolu("QB27","TUBE", idtmed[kInox], ptube, 3);
437 gMC->Gspos("QB27", 1, "QBPM", 0.0, 0.0, 208.1, 0, "ONLY");
440 // Aluminium collar for support rollers
442 gMC->Gsvolu("QB25","TUBE", idtmed[kAlu], ptube, 0);
445 // 2.5 mm thick SS tube for hanging pump
450 gMC->Gsvolu("QB26","TUBE", idtmed[kInox], ptube, 3);
458 Float_t pconQBE0[21];
463 pconQBE0[3]= -(2.*dzb+dzbb)/2.;
467 pconQBE0[6]= -(2.*dzb+dzbb)/2.+dzb;
471 pconQBE0[9]= -(2.*dzb+dzbb)/2.+dzb;
475 pconQBE0[12]= -(2.*dzb+dzbb)/2.+dzb+dzbb;
479 pconQBE0[15]= -(2.*dzb+dzbb)/2.+dzb+dzbb;
483 pconQBE0[18]= -(2.*dzb+dzbb)/2.+dzb+dzbb+dzb;
487 gMC->Gsvolu("QBE0", "PCON", idtmed[kAir], pconQBE0, 21);
493 gMC->Gsvolu("QBEM","TUBE", idtmed[kAir], ptube, 3);
494 Float_t dz = (dzb+dzbb)/2.;
495 gMC->Gspos("QBEM", 2 ,"QBE0", 0.0, 0.0, -dz, 0 , "ONLY");
496 gMC->Gspos("QBEM", 1 ,"QBE0", 0.0, 0.0, dz, idrotm[2012], "ONLY");
502 gMC->Gsvolu("QB19","TUBE", idtmed[kVac], ptube, 3);
503 gMC->Gspos("QB19", 1 ,"QBEM", 0.0, 0.0, 0.5, 0 , "ONLY");
509 gMC->Gsvolu("QB18","TUBE", idtmed[kVac], ptube, 3);
510 for (i=0; i<15; i++) {
511 gMC->Gspos("QB18", i+1, "QBEM", 0.0, 0.0, 3.3-i*0.4, 0, "ONLY");
518 gMC->Gsvolu("QB21","TUBE", idtmed[kVac], ptube, 3);
519 gMC->Gspos("QB21", 1 ,"QBEM", 0.0, 0.0, -4.5, 0 , "ONLY");
525 gMC->Gsvolu("QB15","TUBE", idtmed[kInox], ptube, 3);
526 for (i=0; i<30; i++) {
527 gMC->Gspos("QB15", i+1, "QBEM", 0.0, 0.0, 3.4-i*0.2, 0, "ONLY");
534 gMC->Gsvolu("QB16","TUBE", idtmed[kInox], ptube, 3);
535 for (i=0; i<15; i++) {
536 gMC->Gspos("QB16", i+1, "QBEM", 0.0, 0.0, 3.3-i*0.4, 0, "ONLY");
543 gMC->Gsvolu("QB17","TUBE", idtmed[kInox], ptube, 3);
544 for (i=0; i<14; i++) {
545 gMC->Gspos("QB17", i+1, "QBEM", 0.0, 0.0, 3.1-i*0.4, 0, "ONLY");
552 gMC->Gsvolu("QB14","TUBE", idtmed[kInox], ptube, 3);
553 gMC->Gspos("QB14", 2 ,"QBEM", 0.0, 0.0, -2.8025, 0 , "ONLY");
554 gMC->Gspos("QB14", 1 ,"QBEM", 0.0, 0.0, 3.8025, 0 , "ONLY");
560 gMC->Gsvolu("QB13","TUBE", idtmed[kInox], ptube, 3);
561 gMC->Gspos("QB13", 2 ,"QBEM", 0.0, 0.0, -3.25, 0 , "ONLY");
562 gMC->Gspos("QB13", 1 ,"QBEM", 0.0, 0.0, 4.25, 0 , "ONLY");
568 gMC->Gsvolu("QB12","TUBE", idtmed[kInox], ptube, 3);
569 gMC->Gspos("QB12", 1 ,"QBEM", 0.0, 0.0, 5.0, 0, "ONLY");
573 // pipe between Bellows
577 gMC->Gsvolu("QB23","TUBE", idtmed[kInox], ptube, 3);
578 gMC->Gspos("QB23", 1 ,"QBE0", 0.0, 0.0, 0.0, 0, "ONLY");
583 // **** placement of various sections on non-absorber side ****
585 // first the beryllium section : 43.3 cm long on both sides of IP
586 // zstart=0, zend=43.3, length=43.3 on one side
588 gMC->Gspos("QBBE", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
590 // next meta-metal transition QBT1 on on-absorber side
591 // zstart=43.3, zend=48.8, length=5.5
592 zpos = zpos + hlenQbbe + hlenQbt1;
593 gMC->Gspos("QBT1", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
595 // Aluminium OR Al-be alloy section
596 //zpos=zpos + hlenQbt1 + hlenQb10;
597 //gMC->Gspos("QB10", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
598 // zstart= 48.8, zend=335.4, length=286.6
599 zpos = zpos + hlenQbt1 + hlenQbab;
600 gMC->Gspos("QBAB", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
602 // inox flange at the start of bellow
603 // zstart=335.4, zend=339.8, length=4.4
604 cout<<" zpos 1 "<<zpos<<" hlenQbab "<<hlenQbab<<
605 " hlenQb29 "<< hlenQb29<<endl;
606 zpos = zpos + hlenQbab + hlenQb29;
607 cout<<" zstart 1 "<<zpos-hlenQb29<<" zend 2 "<<zpos+hlenQb29<<endl;
608 gMC->Gspos("QB29", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
611 // zstart=339.8, zend=370.6, length=30.9
612 // zpos = zpos + hlenQb29 + hlenQbe0;
613 zpos = zpos + hlenQb29 + hlenQbe0;
614 cout<<" zstart "<<zpos-hlenQbe0<<" zend "<<zpos-hlenQbe0<<endl;
615 gMC->Gspos("QBE0", 2 ,"QBPM", 0.0, 0.0, zpos, 0, "ONLY");
617 // inox flange at the end of bellow and start of thick inox for pump
618 // zstart=370.6, zend=375.0, length=4.4
619 zpos = zpos + hlenQbe0 + hlenQb29;
620 cout<<" zstart 1 "<<zpos-hlenQb29<<" zend 2 "<<zpos+hlenQb29<<endl;
621 gMC->Gspos("QB29", 2, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
623 // 2.5mm thick inox section to hang the pump
624 // zstart=375.0, zend=395.0, length=20.0
625 zpos = zpos + hlenQb29 + hlenQb26;
626 cout<<" zstart 1 "<<zpos-hlenQb29<<" zend 2 "<<zpos+hlenQb29<<endl;
627 gMC->Gspos("QB26", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
629 //inox flange at the end of pump section to join to next pipe
630 // zstart=395.0, zend=399.4, length=4.4
631 zpos = zpos + hlenQb26 + hlenQb29;
632 gMC->Gspos("QB29", 3, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
634 //last inox section till 800 cm
635 // zstart=399.4, zend=800., length=400.6
636 zpos = zpos + hlenQb29 + hlenQb28;
637 gMC->Gspos("QB28", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
640 // aluminium collars and support rollers at two places
646 gMC->Gsposp("QB25", 1, "QBPM", 0., 0., 654.8, 0, "ONLY", ptube, 3);
647 // gMC->Gspos("QBRM", 1, "QBPM", 0., 0., 654.8, 0, "ONLY");
651 gMC->Gsposp("QB25", 2, "QBPM", 0., 0., 254.8, 0, "ONLY", ptube, 3);
652 // gMC->Gspos("QBRM", 2, "QBPM", 0., 0., 254.8, 0, "ONLY");
656 //******** end of placement on no-absorber side *********
659 // **** Absorber side *****
662 // metal-metal transition : Be-Alu on absorber side
667 gMC->Gsvolu("QBT2","TUBE", idtmed[kAir], ptube, 3);
669 gMC->Gspos("QBT2", 1, "QBPM", 0., 0., -hlenQbbe-ptube[2], idrotm[2012], "ONLY");
676 gMC->Gsvolu("QB02","TUBE", idtmed[kAlu], ptube, 3);
679 gMC->Gsvolu("QBA2","TUBE", idtmed[kBe], ptube, 3);
681 gMC->Gspos("QBA2", 1, "QB02", 0., 0., 0, 0, "ONLY");
682 // z = -2.75 -> -2.00
683 gMC->Gspos("QB02", 1, "QBT2", 0., 0.,-2.75+ptube[2], 0, "ONLY");
690 gMC->Gsvolu("QB04","TUBE", idtmed[kAlu], ptube, 3);
691 gMC->Gspos("QB04", 1, "QBT2", 0., 0.,-2.+ptube[2], 0, "ONLY");
698 gMC->Gsvolu("QB06","TUBE", idtmed[kAlu], ptube, 3);
699 gMC->Gspos("QB06", 1, "QBT2", 0., 0., 2.55+ptube[2], 0, "ONLY");
707 gMC->Gsvolu("QBA8","TUBE", idtmed[kInox], ptube, 3);
708 gMC->Gspos("QBA8", 1 ,"QBT2", 0.000, 3.650, -1.25, idrotm[2002], "ONLY");
709 gMC->Gspos("QBA8", 2 ,"QBT2", 3.161, -1.825, -1.25, idrotm[2001], "ONLY");
710 gMC->Gspos("QBA8", 3 ,"QBT2", -3.161, -1.825, -1.25, idrotm[2003], "ONLY");
717 gMC->Gsvolu("QB77","TUBE", idtmed[kC], ptube, 3);
722 gMC->Gsvolu("QBB7","TUBE", idtmed[kInox], ptube, 3);
723 gMC->Gspos("QBB7", 1, "QB77", 0.0, 0.0, 0.55-0.2, 0, "ONLY");
724 gMC->Gspos("QB77", 1, "QBT2", 0.0, 0.0, 2., 0, "ONLY");
727 // beam pipe between metal-metal transition and bellows
730 ptube[2] = (81.7-(2.*dzb+dzbb)-(hlenQbbe+5.5))/2.;
733 gMC->Gsvolu("QB24","TUBE", idtmed[kInox], ptube, 3);
735 dz = (hlenQbbe+5.5)+ptube[2];
736 gMC->Gspos("QB24", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
738 // beam pipe between flange and bellows
743 gMC->Gsvolu("QB22","TUBE", idtmed[kInox], ptube, 3);
744 gMC->Gspos("QB22", 1 ,"QBPM", 0.0, 0.0, -82.15, 0, "ONLY");
754 gMC->Gsvolu("QFA0","TUBE", idtmed[kAlu], ptube, 3);
755 gMC->Gspos("QFA0", 1 ,"QBPM", 0.0, 0.0, -84.0, 0, "ONLY");
761 gMC->Gsvolu("QFA1","TUBE", idtmed[kInox], ptube, 3);
762 gMC->Gspos("QFA1", 1 ,"QFA0", 0.0, 0.0, 0.225, 0, "ONLY");
768 gMC->Gsvolu("QFA2","TUBE", idtmed[kInox], ptube, 3);
769 for (i=0; i<8; i++) {
770 Float_t phi = i*45.*kDegrad;
771 Float_t xpos = 3.9*TMath::Sin(phi);
772 Float_t ypos = 3.9*TMath::Cos(phi);
773 gMC->Gspos("QFA2", i+1, "QFA0", xpos, ypos, 0., 0, "ONLY");
781 gMC->Gsvolu("QB32","TUBE", idtmed[kInox], ptube, 3);
782 gMC->Gspos("QB32", 1 ,"QBPM", 0.0, 0.0, -90.+2.3, 0, "ONLY");
784 //bellow on absorber side
785 ptube[2] = (2.*dzb+dzbb)/2.;
786 dz = (81.7-ptube[2]);
787 gMC->Gspos("QBE0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
790 // --- Place the PIPE ghost volume (QBPM) in its mother volume (ALIC)
791 // by rotating it to 180 deg. and make it invisible
795 gMC->Gspos("QBPM",1,"ALIC",0,0,0,idrotm[2013], "ONLY");
799 // ******** Ion Pump volume description starts here ******
806 gMC->Gsvolu("QI32","BOX", idtmed[kInox], pbox, 3);
811 gMC->Gsvolu("QI42","BOX", idtmed[kGetter], pbox, 3);
812 gMC->Gspos("QI42", 1, "QI32", 0.0, 0.0, 0.0, 0, "ONLY");
818 gMC->Gsvolu("QI33","TUBE", idtmed[kInox], ptube, 3);
824 gMC->Gsvolu("QI43","TUBE", idtmed[kAir], ptube, 3);
825 gMC->Gspos("QI43", 1, "QI33", 0.0, 0.0, 0.0, 0, "ONLY");
827 // Connecting tube ->
831 gMC->Gsvolu("QI34","TUBE", idtmed[kInox], ptube, 3);
836 gMC->Gsvolu("QI44","TUBE", idtmed[kAir], ptube, 3);
837 gMC->Gspos("QI44", 1, "QI34", 0.0, 0.0, 0.0, 0, "ONLY");
845 gMC->Gsvolu("QI35","TUBE", idtmed[kInox], ptube, 3);
847 Float_t zPump = 415.;
848 gMC->Gspos("QI32", 1, "QBPM", 0.0, -44.25, zPump, 0, "ONLY");
849 gMC->Gspos("QI33", 1, "QBPM", 0.0, -35.00, zPump,idrotm[2002], "ONLY");
850 gMC->Gspos("QI34", 1, "QBPM", 0.0, -17.90, zPump,idrotm[2002], "ONLY");
851 gMC->Gspos("QI35", 1, "QBPM", 0.0, -24.35, zPump,idrotm[2002], "ONLY");
853 gMC->Gsatt("QBPM", "SEEN", 1);
854 gMC->Gsatt("QBEM", "SEEN", 1);
859 //___________________________________________
860 void AliPIPEv0::CreateMaterials()
863 // Define materials for beam pipe
866 if(fDebug) printf("%s: Create PIPEv0 materials \n",ClassName());
867 Int_t isxfld = gAlice->Field()->Integ();
868 Float_t sxmgmx = gAlice->Field()->Max();
870 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
871 Float_t zsteel[4] = { 26.,24.,28.,14. };
872 Float_t wsteel[4] = { .715,.18,.1,.005 };
874 Float_t aAlBe[2] = { 26.98, 9.01};
875 Float_t zAlBe[2] = { 13.00, 4.00};
876 Float_t wAlBe[2] = { 0.4, 0.6};
880 AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
883 AliMaterial(6, "CARBON$ ", 12.01, 6., 2.265, 18.8, 49.9);
886 AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
889 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
892 AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
895 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
897 // reduced density steel to approximate pump getter material
898 AliMixture(20, "GETTER$", asteel, zsteel, 1.00, 4, wsteel);
901 AliMixture(21, "AlBe$", aAlBe, zAlBe, 2.07, 2, wAlBe);
904 // Defines tracking media parameters.
906 Float_t epsil = .001; // Tracking precision,
907 Float_t stemax = -0.01; // Maximum displacement for multiple scat
908 Float_t tmaxfd = -20.; // Maximum angle due to field deflection
909 Float_t deemax = -.3; // Maximum fractional energy loss, DLS
915 AliMedium(5, "BE", 5, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
918 AliMedium(6, "C", 6, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
921 AliMedium(9, "ALU", 9, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
924 AliMedium(15, "AIR", 15, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
927 AliMedium(16, "VACUUM", 16, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
930 AliMedium(19, "INOX", 19, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
933 AliMedium(20, "GETTER", 20, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
936 AliMedium(21, "AlBe" , 21, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);