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 1.20 2002/05/02 12:36:43 morsch
19 New version of beam-pipe geometry. Ref. AL502206PL
20 (used in production readiness report).
22 Revision 1.19 2002/03/25 12:34:40 morsch
23 Obsolete support rollers removed.
25 Revision 1.18 2002/02/01 18:02:41 morsch
26 Material of beam pipe between inner Be piece and forward detectors
27 can be set by SetPipeMaterial(mat), mat = kInox, kAlu, kBe ...
29 Revision 1.17 2001/09/24 13:11:50 morsch
30 Ion pump and bellows moved out by 15 cm to make space for forward
33 Revision 1.16 2001/05/16 14:57:22 alibrary
34 New files for folders and Stack
36 Revision 1.15 2001/05/02 11:50:18 morsch
37 New layout of the non-absorber side provided by Y. Viyogi. Not the final design
38 but the prsent most realistic.
40 Revision 1.14 2001/01/20 16:56:33 morsch
41 Put air in connecting tubes and flanges of vacuum pump.
43 Revision 1.13 2001/01/20 16:35:27 morsch
44 Increase mother volume for bellows.
46 Revision 1.12 2000/12/21 16:41:06 morsch
47 Coding convention clean-up (RS3)
49 Revision 1.11 2000/11/28 16:06:57 morsch
50 Undulated beam-pipe replaced by Al-Be (40,60) pipe 1.5 mm thick.
52 Revision 1.10 2000/11/24 13:00:37 morsch
53 - Geometry and materials imported from euclid output
55 - better struturing of volume tree
56 - improved version of flange close to front absorber
57 - more realistic pump materials
58 - undulated beam pipe imported from v3.
60 Revision 1.9 2000/10/02 21:28:15 fca
61 Removal of useless dependecies via forward declarations
63 Revision 1.8 2000/06/11 12:37:01 morsch
64 Coding rule violations corrected
66 Revision 1.7 2000/02/23 16:25:24 fca
67 AliVMC and AliGeant3 classes introduced
68 ReadEuclid moved from AliRun to AliModule
70 Revision 1.6 1999/09/29 09:24:30 fca
71 Introduction of the Copyright and cvs Log
75 ////////////////////////////////////////////////
77 ////////////////////////////////////////////////
79 #include "AliPIPEv0.h"
90 //_____________________________________________________________________________
91 AliPIPEv0::AliPIPEv0()
97 //_____________________________________________________________________________
98 AliPIPEv0::AliPIPEv0(const char *name, const char *title)
106 //___________________________________________
107 void AliPIPEv0::CreateGeometry()
111 <img src="picts/pipe.gif">
118 <img src="picts/tree_pipe.gif">
122 if(fDebug) printf("%s: Create PIPEv0 geometry \n",ClassName());
125 Int_t *idtmed = fIdtmed->GetArray();
126 Float_t ppcon[84], ptube[3], pbox[3];
131 AliMatrix(idrotm[2001],90.,240., 0., 0., 90.,150.);
132 AliMatrix(idrotm[2002],90., 0., 0., 0., 90.,270.);
133 AliMatrix(idrotm[2003],90.,120., 0., 0., 90., 30.);
134 AliMatrix(idrotm[2004],90.,315., 90., 45., 0., 0.);
135 AliMatrix(idrotm[2005],90.,270., 90., 0., 0., 0.);
136 AliMatrix(idrotm[2006],90.,225., 90.,315., 0., 0.);
137 AliMatrix(idrotm[2007],90.,180., 90.,270., 0., 0.);
138 AliMatrix(idrotm[2008],90.,135., 90.,225., 0., 0.);
139 AliMatrix(idrotm[2009],90., 90., 90.,180., 0., 0.);
140 AliMatrix(idrotm[2010],90., 45., 90.,135., 0., 0.);
142 AliMatrix(idrotm[2012],90.,180., 90., 90.,180., 0.);
143 AliMatrix(idrotm[2013],90., 0., 90., 90.,180., 0.);
147 // distance between bellows
148 const Float_t dzbb = 9.0;
149 // total size of bellow section
150 const Float_t dzb = 15.0;
151 // size of undulated region
152 const Float_t dzub = 2.0;
154 // half-lengths of various beam pipe sections
156 Float_t hlenQbbe1 = 40.;
157 Float_t hlenQbbe2 = 36.5;
158 Float_t hlenQbbe = (hlenQbbe1+hlenQbbe2)/2.;
161 // Float_t hlenQbt1 = 5.5/2.;
163 // Pipe outside central region (non-absober side)
164 Float_t hlenQbab = 157.5;
166 // Flange non-absorber side
167 Float_t hlenQb29 = 11.5/2.+1.75 + 5.0;
170 Float_t hlenQbe0 = dzb;
172 // Inox pipe between Be and Bellow (absorber side)
173 Float_t hlenQb24[3] = {10.5/2., 1.8, 3.3};
176 Float_t hlenQb28 = (800.-hlenQbbe1-2.*hlenQbab-4.*hlenQb29-2.*hlenQbe0)/2.;
178 // Position of the pump
179 Float_t zPump = hlenQbbe1+2.*hlenQbab+2.*hlenQb29+dzb;
181 // Inner beam pipe radius
183 Float_t RinSt = 2.92;
186 Float_t RoutBe = 2.98;
187 Float_t RoutSt = 3.00;
194 // The peam pipe up to the Front Absorber
196 // Mother Volume QBPM
205 ppcon[6] = -90+2.*hlenQb24[2]+2.8+2.*hlenQb24[1];
213 ppcon[12] = ppcon[9] + 2. + 2.*dzub+0.2;
217 ppcon[15] = ppcon[12];
221 ppcon[18] = ppcon[15] + 2.* dzbb-0.4;
225 ppcon[21] = ppcon[18];
245 ppcon[36] = hlenQbbe1+2.*hlenQbab-0.1;
249 ppcon[39] = ppcon[36];
253 ppcon[42] = ppcon[39]+2.*hlenQb29-5.;
257 ppcon[45] = ppcon[42];
261 ppcon[48] = ppcon[45]+2.*dzb+10.;
265 ppcon[51] = ppcon[48];
273 gMC->Gsvolu("QBPM", "PCON", idtmed[kAir], ppcon,57);
277 // volume definitions of various sections
282 gMC->Gsvolu("QBVA","TUBE", idtmed[kVac], ptube, 0);
285 ptube[2] = (90.-hlenQbbe2)/2.;
286 dz = -90. + ptube[2];
287 gMC->Gsposp ("QBVA", 1, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
291 ptube[2] = hlenQbbe+hlenQbab;
293 gMC->Gsposp ("QBVA", 2, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
297 ptube[2] = (800.-hlenQbbe1-2.*hlenQbab)/2.;
299 gMC->Gsposp ("QBVA", 3, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
302 // Be Pipe in central Alice
307 gMC->Gsvolu("QBBE","TUBE", idtmed[kBe], ptube, 3);
342 gMC->Gsvolu("QBSR", "PCON", idtmed[kC], ppcon,21);
343 gMC->Gspos("QBSR", 1, "QBPM", 0.0, 0.0, 40., 0, "ONLY");
344 gMC->Gspos("QBSR", 2, "QBPM", 0.0, 0.0, 150., 0, "ONLY");
345 gMC->Gspos("QBSR", 3, "QBPM", 0.0, 0.0, 260., 0, "ONLY");
346 gMC->Gspos("QBSR", 4, "QBPM", 0.0, 0.0,- 46., 0, "ONLY");
348 // Flange and Fixed Point: non absorber side
357 ppcon[3] = -hlenQb29;
361 ppcon[6] = ppcon[3]+3.6;
369 ppcon[12] = hlenQb29;
373 gMC->Gsvolu("QB29", "PCON", idtmed[kAir], ppcon,15);
380 gMC->Gsvolu("QF29","TUBE", idtmed[kInox], ptube, 3);
381 gMC->Gspos("QF29", 1, "QB29", 0.0, 0.0, -hlenQb29+1.75, 0, "ONLY");
386 gMC->Gsvolu("QS29","TUBE", idtmed[kInox], ptube, 3);
387 gMC->Gspos("QS29", 1, "QB29", 0.0, 0.0, 0., 0, "ONLY");
392 gMC->Gsvolu("QP29","TUBE", idtmed[kInox], ptube, 3);
393 gMC->Gspos("QP29", 1, "QB29", 0.0, 0.0, -hlenQb29+9.75+3., 0, "ONLY");
397 // Inox beam pipe: final section on non-absorber side
403 gMC->Gsvolu("QB28","TUBE", idtmed[kInox], ptube, 3);
406 // Al-Be (40-60 wgt%, rho=2.7 g/cm**3) beam pipe
408 // This section is under study (A.M. 1/2/2002)
412 if (fPipeMaterial == kAlu) {
414 } else if (fPipeMaterial == kBe) {
416 } else if (fPipeMaterial == kInox){
421 gMC->Gsvolu("QBAB","TUBE", idtmed[fPipeMaterial], ptube, 3);
423 // 2.5 mm thick SS tube for hanging pump
429 gMC->Gsvolu("QB26","TUBE", idtmed[kInox], ptube, 3);
436 Float_t pconQBE0[33];
443 pconQBE0[ 5]= RoutSt;
445 pconQBE0[ 6]= -dzb+2.;
447 pconQBE0[ 8]= RoutSt;
449 pconQBE0[ 9]= -dzb+2.;
453 pconQBE0[12]= -dzb+2.+2.*dzub;
457 pconQBE0[15]= -dzb+2.+2.*dzub;
459 pconQBE0[17]= RoutSt;
461 pconQBE0[18]= -dzb+2.+2.*dzub+2.*dzbb;
463 pconQBE0[20]= RoutSt;
465 pconQBE0[21]= -dzb+2.+2.*dzub+2.*dzbb;
469 pconQBE0[24]= -dzb+2.+4.*dzub+2.*dzbb;
473 pconQBE0[27]= -dzb+2.+4.*dzub+2.*dzbb;
475 pconQBE0[29]= RoutSt;
479 pconQBE0[32]= RoutSt;
480 gMC->Gsvolu("QBE0", "PCON", idtmed[kAir], pconQBE0, 33);
482 // Undulated piece mother
486 gMC->Gsvolu("QBEM","TUBE", idtmed[kAir], ptube, 3);
488 gMC->Gspos("QBEM", 2 ,"QBE0", 0.0, 0.0, dz, 0 , "ONLY");
489 gMC->Gspos("QBEM", 1 ,"QBE0", 0.0, 0.0, -dz, idrotm[2012], "ONLY");
493 Float_t ur = 2.*dzub-12.*uw;
513 pund[12] = pund[9]+uw;
521 pund[18] = pund[12]+uz;
529 pund[24] = pund[21]+uw;
533 gMC->Gsvolu("QBEU", "PCON", idtmed[kInox], pund, 27);
535 for (i = 0; i < 6; i++)
537 dz = -dzub+(1+2*i)*ut;
538 gMC->Gspos("QBEU", i+1 ,"QBEM", 0.0, 0.0, dz, 0 , "ONLY");
543 gMC->Gsvolu("QBEW","TUBE", idtmed[kInox], ptube, 3);
544 gMC->Gspos("QBEW", 1 ,"QBEM", 0.0, 0.0, dzub-uz, 0 , "ONLY");
547 gMC->Gsvolu("QBEP","TUBE", idtmed[kInox], ptube, 0);
551 gMC->Gsposp("QBEP", 1 ,"QBE0", 0.0, 0.0, -dzb+1., 0 , "ONLY", ptube, 3);
552 gMC->Gsposp("QBEP", 2 ,"QBE0", 0.0, 0.0, dzb-1., 0 , "ONLY", ptube, 3);
554 gMC->Gsposp("QBEP", 3 ,"QBE0", 0.0, 0.0, 0., 0 , "ONLY", ptube, 3);
556 // End undulated part
561 // **** Placement of various sections on non-absorber side ****
564 // first the beryllium section
565 Float_t zpos = -(hlenQbbe2-hlenQbbe1)/2;
566 gMC->Gspos("QBBE", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
568 // next meta-metal transition QBT1 on on-absorber side
569 // zpos = zpos + hlenQbbe + hlenQbt1;
570 // gMC->Gspos("QBT1", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
572 // Aluminium OR Al-be alloy section
573 zpos = hlenQbbe1+hlenQbab;
574 gMC->Gspos("QBAB", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
576 // inox flange at the start of bellow
577 zpos = zpos + hlenQbab + hlenQb29;
578 gMC->Gspos("QB29", 1, "QBPM", 0.0, 0.0, zpos, idrotm[2012], "ONLY");
581 zpos = zpos + hlenQb29 + hlenQbe0;
582 gMC->Gspos("QBE0", 2 ,"QBPM", 0.0, 0.0, zpos, 0, "ONLY");
584 // inox flange at the end of bellow and start of thick inox for pump
585 zpos = zpos + hlenQbe0 + hlenQb29;
586 gMC->Gspos("QB29", 2, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
588 //last inox section till 800 cm
589 zpos = zpos + hlenQb29 + hlenQb28;
590 gMC->Gspos("QB28", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
592 //******** end of placement on no-absorber side *********
595 // **** Absorber side *****
599 // metal-metal transition : Be-Alu on absorber side
604 gMC->Gsvolu("QBT2","TUBE", idtmed[kAir], ptube, 3);
606 gMC->Gspos("QBT2", 1, "QBPM", 0., 0., -hlenQbbe-ptube[2], idrotm[2012], "ONLY");
613 gMC->Gsvolu("QB02","TUBE", idtmed[kAlu], ptube, 3);
616 gMC->Gsvolu("QBA2","TUBE", idtmed[kBe], ptube, 3);
618 gMC->Gspos("QBA2", 1, "QB02", 0., 0., 0, 0, "ONLY");
619 // z = -2.75 -> -2.00
620 gMC->Gspos("QB02", 1, "QBT2", 0., 0.,-2.75+ptube[2], 0, "ONLY");
627 gMC->Gsvolu("QB04","TUBE", idtmed[kAlu], ptube, 3);
628 gMC->Gspos("QB04", 1, "QBT2", 0., 0.,-2.+ptube[2], 0, "ONLY");
635 gMC->Gsvolu("QB06","TUBE", idtmed[kAlu], ptube, 3);
636 gMC->Gspos("QB06", 1, "QBT2", 0., 0., 2.55+ptube[2], 0, "ONLY");
644 gMC->Gsvolu("QBA8","TUBE", idtmed[kInox], ptube, 3);
645 gMC->Gspos("QBA8", 1 ,"QBT2", 0.000, 3.650, -1.25, idrotm[2002], "ONLY");
646 gMC->Gspos("QBA8", 2 ,"QBT2", 3.161, -1.825, -1.25, idrotm[2001], "ONLY");
647 gMC->Gspos("QBA8", 3 ,"QBT2", -3.161, -1.825, -1.25, idrotm[2003], "ONLY");
654 gMC->Gsvolu("QB77","TUBE", idtmed[kC], ptube, 3);
659 gMC->Gsvolu("QBB7","TUBE", idtmed[kInox], ptube, 3);
660 gMC->Gspos("QBB7", 1, "QB77", 0.0, 0.0, 0.55-0.2, 0, "ONLY");
661 gMC->Gspos("QB77", 1, "QBT2", 0.0, 0.0, 2., 0, "ONLY");
664 // Beam pipes between elements
667 gMC->Gsvolu("QB24","TUBE", idtmed[kInox], ptube, 0);
670 ptube[2] = hlenQb24[0];
671 dz = hlenQbbe2 + ptube[2];
672 gMC->Gsposp("QB24", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
674 // Bellow on absorber side
675 dz = dz+hlenQb24[0] + dzb;
676 gMC->Gspos("QBE0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
678 ptube[2] = hlenQb24[1];
679 dz = dz + dzb + ptube[2];
680 gMC->Gsposp("QB24", 2 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
691 gMC->Gsvolu("QFA0","TUBE", idtmed[kInox], ptube, 3);
693 gMC->Gspos("QFA0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
699 ptube[2] = hlenQb24[2];
701 gMC->Gsposp("QB24", 3 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
704 // --- Place the PIPE ghost volume (QBPM) in its mother volume (ALIC)
705 // by rotating it to 180 deg. and make it invisible
707 gMC->Gspos("QBPM",1,"ALIC",0,0,0,idrotm[2013], "ONLY");
711 // ******** Ion Pump volume description starts here ******
718 gMC->Gsvolu("QI32","BOX", idtmed[kInox], pbox, 3);
723 gMC->Gsvolu("QI42","BOX", idtmed[kGetter], pbox, 3);
724 gMC->Gspos("QI42", 1, "QI32", 0.0, 0.0, 0.0, 0, "ONLY");
730 gMC->Gsvolu("QI33","TUBE", idtmed[kInox], ptube, 3);
736 gMC->Gsvolu("QI43","TUBE", idtmed[kAir], ptube, 3);
737 gMC->Gspos("QI43", 1, "QI33", 0.0, 0.0, 0.0, 0, "ONLY");
739 // Connecting tube ->
743 gMC->Gsvolu("QI34","TUBE", idtmed[kInox], ptube, 3);
748 gMC->Gsvolu("QI44","TUBE", idtmed[kAir], ptube, 3);
749 gMC->Gspos("QI44", 1, "QI34", 0.0, 0.0, 0.0, 0, "ONLY");
757 gMC->Gsvolu("QI35","TUBE", idtmed[kInox], ptube, 3);
759 gMC->Gspos("QI32", 1, "QBPM", 0.0, -44.25, zPump, 0, "ONLY");
760 gMC->Gspos("QI33", 1, "QBPM", 0.0, -35.00, zPump,idrotm[2002], "ONLY");
761 gMC->Gspos("QI34", 1, "QBPM", 0.0, -17.90, zPump,idrotm[2002], "ONLY");
762 gMC->Gspos("QI35", 1, "QBPM", 0.0, -24.35, zPump,idrotm[2002], "ONLY");
764 gMC->Gsatt("QBPM", "SEEN", 1);
765 gMC->Gsatt("QBEM", "SEEN", 1);
770 //___________________________________________
771 void AliPIPEv0::CreateMaterials()
774 // Define materials for beam pipe
777 if(fDebug) printf("%s: Create PIPEv0 materials \n",ClassName());
778 Int_t isxfld = gAlice->Field()->Integ();
779 Float_t sxmgmx = gAlice->Field()->Max();
781 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
782 Float_t zsteel[4] = { 26.,24.,28.,14. };
783 Float_t wsteel[4] = { .715,.18,.1,.005 };
785 Float_t aAlBe[2] = { 26.98, 9.01};
786 Float_t zAlBe[2] = { 13.00, 4.00};
787 Float_t wAlBe[2] = { 0.4, 0.6};
791 AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
794 AliMaterial(6, "CARBON$ ", 12.01, 6., 2.265, 18.8, 49.9);
797 AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
800 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
803 AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
806 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
808 // reduced density steel to approximate pump getter material
809 AliMixture(20, "GETTER$", asteel, zsteel, 1.00, 4, wsteel);
812 AliMixture(21, "AlBe$", aAlBe, zAlBe, 2.07, 2, wAlBe);
815 // Defines tracking media parameters.
817 Float_t epsil = .001; // Tracking precision,
818 Float_t stemax = -0.01; // Maximum displacement for multiple scat
819 Float_t tmaxfd = -20.; // Maximum angle due to field deflection
820 Float_t deemax = -.3; // Maximum fractional energy loss, DLS
826 AliMedium(5, "BE", 5, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
829 AliMedium(6, "C", 6, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
832 AliMedium(9, "ALU", 9, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
835 AliMedium(15, "AIR", 15, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
838 AliMedium(16, "VACUUM", 16, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
841 AliMedium(19, "INOX", 19, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
844 AliMedium(20, "GETTER", 20, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
847 AliMedium(21, "AlBe" , 21, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);