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 //-------------------------------------------------------------------------
22 //-------------------------------------------------------------------------
24 #include <Riostream.h>
27 #include <TVirtualMC.h>
31 #include "AliPIPEv0.h"
36 //_____________________________________________________________________________
37 AliPIPEv0::AliPIPEv0()
43 //_____________________________________________________________________________
44 AliPIPEv0::AliPIPEv0(const char *name, const char *title)
52 //___________________________________________
53 void AliPIPEv0::CreateGeometry()
57 <img src="picts/pipe.gif">
64 <img src="picts/tree_pipe.gif">
68 if(fDebug) printf("%s: Create PIPEv0 geometry \n",ClassName());
71 Int_t *idtmed = fIdtmed->GetArray();
72 Float_t ppcon[90], ptube[3], pbox[3];
77 AliMatrix(idrotm[2001],90.,240., 0., 0., 90.,150.);
78 AliMatrix(idrotm[2002],90., 0., 0., 0., 90.,270.);
79 AliMatrix(idrotm[2003],90.,120., 0., 0., 90., 30.);
80 AliMatrix(idrotm[2004],90.,315., 90., 45., 0., 0.);
81 AliMatrix(idrotm[2005],90.,270., 90., 0., 0., 0.);
82 AliMatrix(idrotm[2006],90.,225., 90.,315., 0., 0.);
83 AliMatrix(idrotm[2007],90.,180., 90.,270., 0., 0.);
84 AliMatrix(idrotm[2008],90.,135., 90.,225., 0., 0.);
85 AliMatrix(idrotm[2009],90., 90., 90.,180., 0., 0.);
86 AliMatrix(idrotm[2010],90., 45., 90.,135., 0., 0.);
88 AliMatrix(idrotm[2012],90.,180., 90., 90.,180., 0.);
89 AliMatrix(idrotm[2013],90., 0., 90., 90.,180., 0.);
93 // distance between bellows
94 // total size of bellow section
95 const Float_t kdzb = 15.0;
96 // size of undulated region
100 // distance between bellows
101 const Float_t kdzbbA = 5.0;
102 // total size of bellow section
103 const Float_t kdzbA = 15.0;
104 // size of undulated region
105 const Float_t kdzubA = 3.75;
107 // half-lengths of various beam pipe sections
109 Float_t hlenQbbe1 = 40.;
110 Float_t hlenQbbe2 = 36.5;
111 Float_t hlenQbbe = (hlenQbbe1+hlenQbbe2)/2.;
114 // Float_t hlenQbt1 = 5.5/2.;
116 // Pipe outside central region (non-absober side)
117 Float_t hlenQbab = 157.5;
119 // Flange non-absorber side
120 Float_t hlenQb29 = 11.5/2.+1.75 + 5.0;
123 Float_t hlenQbe0 = kdzbA;
125 // Inox pipe between Be and Bellow (absorber side)
126 Float_t hlenQb24[3] = {10.5/2., 1.8, 3.3};
129 Float_t hlenQb28 = (800.-hlenQbbe1-2.*hlenQbab-4.*hlenQb29-2.*hlenQbe0)/2.;
131 // Position of the pump
132 Float_t zPump = hlenQbbe1+2.*hlenQbab+2.*hlenQb29+kdzb;
134 // Inner beam pipe radius
136 const Float_t kRinBe = 2.9;
138 const Float_t kRinSt = 2.9;
140 const Float_t kRinSB = 2.92;
142 // Outer beam pipe radius
144 const Float_t kRoutBe = 2.98;
146 const Float_t kRoutSt = 2.98;
148 const Float_t kRoutSB = 3.00;
154 // The peam pipe up to the Front Absorber
156 // Mother Volume QBPM
173 ppcon[12] = -90+2.*hlenQb24[2]+2.8+2.*hlenQb24[1];
177 ppcon[15] = ppcon[12];
181 ppcon[18] = ppcon[15] + 2.5 + 2.*kdzubA+0.2;
185 ppcon[21] = ppcon[18];
189 ppcon[24] = ppcon[21] + 2.* kdzbbA-0.4;
193 ppcon[27] = ppcon[24];
213 ppcon[42] = hlenQbbe1+2.*hlenQbab-0.1;
217 ppcon[45] = ppcon[42];
221 ppcon[48] = ppcon[45]+2.*hlenQb29-5.;
225 ppcon[51] = ppcon[48];
229 ppcon[54] = ppcon[51]+2.*kdzb+10.;
233 ppcon[57] = ppcon[54];
241 gMC->Gsvolu("QBPM", "PCON", idtmed[kAir], ppcon,63);
245 // volume definitions of various sections
250 gMC->Gsvolu("QBVA","TUBE", idtmed[kVac], ptube, 0);
253 ptube[2] = (90.-hlenQbbe2)/2.;
254 dz = -90. + ptube[2];
255 gMC->Gsposp ("QBVA", 1, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
259 ptube[2] = hlenQbbe+hlenQbab;
261 gMC->Gsposp ("QBVA", 2, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
265 ptube[2] = (800.-hlenQbbe1-2.*hlenQbab)/2.;
267 gMC->Gsposp ("QBVA", 3, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
270 // Be Pipe in central Alice
275 gMC->Gsvolu("QBBE","TUBE", idtmed[kBe], ptube, 3);
284 gMC->Gsvolu("QBSR", "TUBE", idtmed[kAlu], ptube,3);
288 gMC->Gsvolu("QBSS", "TUBE", idtmed[kPA], ptube,3);
289 gMC->Gspos("QBSS", 1, "QBSR", 0.0, 0.0, 0.0, 0, "ONLY");
291 gMC->Gspos("QBSR", 1, "QBPM", 0.0, 0.0, 40., 0, "ONLY");
292 gMC->Gspos("QBSR", 2, "QBPM", 0.0, 0.0, 150., 0, "ONLY");
293 gMC->Gspos("QBSR", 3, "QBPM", 0.0, 0.0, 260., 0, "ONLY");
294 gMC->Gspos("QBSR", 4, "QBPM", 0.0, 0.0,- 46., 0, "ONLY");
296 // Flange and Fixed Point: non absorber side
305 ppcon[3] = -hlenQb29;
309 ppcon[6] = ppcon[3]+3.6;
317 ppcon[12] = hlenQb29;
321 gMC->Gsvolu("QB29", "PCON", idtmed[kAir], ppcon,15);
328 gMC->Gsvolu("QF29","TUBE", idtmed[kInox], ptube, 3);
329 gMC->Gspos("QF29", 1, "QB29", 0.0, 0.0, -hlenQb29+1.75, 0, "ONLY");
334 gMC->Gsvolu("QS29","TUBE", idtmed[kInox], ptube, 3);
335 gMC->Gspos("QS29", 1, "QB29", 0.0, 0.0, 0., 0, "ONLY");
340 gMC->Gsvolu("QP29","TUBE", idtmed[kInox], ptube, 3);
341 gMC->Gspos("QP29", 1, "QB29", 0.0, 0.0, -hlenQb29+9.75+3., 0, "ONLY");
345 // Inox beam pipe: final section on non-absorber side
351 gMC->Gsvolu("QB28","TUBE", idtmed[kInox], ptube, 3);
354 // Al-Be (40-60 wgt%, rho=2.7 g/cm**3) beam pipe
356 // This section is under study (A.M. 1/2/2002)
360 if (fPipeMaterial == kAlu) {
362 } else if (fPipeMaterial == kBe) {
364 } else if (fPipeMaterial == kInox){
369 gMC->Gsvolu("QBAB","TUBE", idtmed[fPipeMaterial], ptube, 3);
371 // 2.5 mm thick SS tube for hanging pump
377 gMC->Gsvolu("QB26","TUBE", idtmed[kInox], ptube, 3);
384 Float_t pconQBE0[33];
389 pconQBE0[ 3] = -kdzbA;
390 pconQBE0[ 4] = kRinSB;
391 pconQBE0[ 5] = kRoutSB;
393 pconQBE0[ 6] = -kdzbA+2.5;
394 pconQBE0[ 7] = kRinSB;
395 pconQBE0[ 8] = kRoutSB;
397 pconQBE0[ 9] = -kdzbA+2.5;
398 pconQBE0[10] = kRinSB;
401 pconQBE0[12] = -kdzbA+2.5+2.*kdzubA;
402 pconQBE0[13] = kRinSB;
405 pconQBE0[15] = -kdzbA+2.5+2.*kdzubA;
406 pconQBE0[16] = kRinSB;
407 pconQBE0[17] = kRoutSB;
409 pconQBE0[18] = -kdzbA+2.5+2.*kdzubA+2.*kdzbbA;
410 pconQBE0[19] = kRinSB;
411 pconQBE0[20] = kRoutSB;
413 pconQBE0[21] = -kdzbA+2.5+2.*kdzubA+2.*kdzbbA;
414 pconQBE0[22] = kRinSB;
417 pconQBE0[24] = -kdzbA+2.5+4.*kdzubA+2.*kdzbbA;
418 pconQBE0[25] = kRinSB;
421 pconQBE0[27] = -kdzbA+2.5+4.*kdzubA+2.*kdzbbA;
422 pconQBE0[28] = kRinSB;
423 pconQBE0[29] = kRoutSB;
425 pconQBE0[30] = -kdzbA+5.0+4.*kdzubA+2.*kdzbbA;
426 pconQBE0[31] = kRinSB;
427 pconQBE0[32] = kRoutSB;
429 gMC->Gsvolu("QBE0", "PCON", idtmed[kAir], pconQBE0, 33);
431 // Undulated piece mother
435 gMC->Gsvolu("QBEM","TUBE", idtmed[kAir], ptube, 3);
436 dz = -kdzbA+kdzubA+2.5;
437 gMC->Gspos("QBEM", 2 ,"QBE0", 0.0, 0.0, dz, 0 , "ONLY");
438 gMC->Gspos("QBEM", 1 ,"QBE0", 0.0, 0.0, -dz, idrotm[2012], "ONLY");
442 Float_t ur = 2.*kdzubA-36.*uw;
452 pund[ 5] = kRinSB+uw;
462 pund[12] = pund[9]+uw;
470 pund[18] = pund[12]+uz;
478 pund[24] = pund[21]+uw;
482 gMC->Gsvolu("QBEU", "PCON", idtmed[kInox], pund, 27);
484 for (i = 0; i < 18; i++)
486 dz = -kdzubA+(1+2*i)*ut;
487 gMC->Gspos("QBEU", i+1 ,"QBEM", 0.0, 0.0, dz, 0 , "ONLY");
490 ptube[1] = kRinSB+uw;
492 gMC->Gsvolu("QBEW","TUBE", idtmed[kInox], ptube, 3);
493 gMC->Gspos("QBEW", 1 ,"QBEM", 0.0, 0.0, kdzubA-uz, 0 , "ONLY");
497 gMC->Gsvolu("QBEP","TUBE", idtmed[kInox], ptube, 0);
501 gMC->Gsposp("QBEP", 1 ,"QBE0", 0.0, 0.0, -kdzbA+1.25, 0 , "ONLY", ptube, 3);
502 gMC->Gsposp("QBEP", 2 ,"QBE0", 0.0, 0.0, kdzbA-1.25, 0 , "ONLY", ptube, 3);
504 gMC->Gsposp("QBEP", 3 ,"QBE0", 0.0, 0.0, 0., 0 , "ONLY", ptube, 3);
509 // **** Placement of various sections on non-absorber side ****
512 // first the beryllium section
513 Float_t zpos = -(hlenQbbe2-hlenQbbe1)/2;
514 gMC->Gspos("QBBE", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
516 // next meta-metal transition QBT1 on on-absorber side
517 // zpos = zpos + hlenQbbe + hlenQbt1;
518 // gMC->Gspos("QBT1", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
520 // Aluminium OR Al-be alloy section
521 zpos = hlenQbbe1+hlenQbab;
522 gMC->Gspos("QBAB", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
524 // inox flange at the start of bellow
525 zpos = zpos + hlenQbab + hlenQb29;
526 gMC->Gspos("QB29", 1, "QBPM", 0.0, 0.0, zpos, idrotm[2012], "ONLY");
529 zpos = zpos + hlenQb29 + hlenQbe0;
530 gMC->Gspos("QBE0", 2 ,"QBPM", 0.0, 0.0, zpos, 0, "ONLY");
532 // inox flange at the end of bellow and start of thick inox for pump
533 zpos = zpos + hlenQbe0 + hlenQb29;
534 gMC->Gspos("QB29", 2, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
536 //last inox section till 800 cm
537 zpos = zpos + hlenQb29 + hlenQb28;
538 gMC->Gspos("QB28", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
540 //******** end of placement on non-absorber side *********
542 // **** Absorber side *****
546 // Beam pipes between elements
548 gMC->Gsvolu("QB24","TUBE", idtmed[kInox], ptube, 0);
551 ptube[2] = hlenQb24[0];
557 bpbe[ 3] = -hlenQb24[0];
561 bpbe[ 6] = hlenQb24[0] - 5.8;
565 bpbe[ 9] = hlenQb24[0] - 5.8;
569 bpbe[12] = hlenQb24[0] - 4.5;
573 bpbe[15] = hlenQb24[0] - 4.5;
577 bpbe[18] = hlenQb24[0] - 3.5;
581 bpbe[21] = hlenQb24[0] - 3.5;
585 bpbe[24] = hlenQb24[0] - 3.0;
589 bpbe[27] = hlenQb24[0] - 3.0;
593 bpbe[30] = hlenQb24[0];
597 gMC->Gsvolu("QA24","PCON", idtmed[kInox], bpbe, 33);
599 dz = hlenQbbe2 + hlenQb24[0];
601 gMC->Gspos("QA24", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
603 // Bellow on absorber side
605 dz = dz+hlenQb24[0] + kdzbA;
606 gMC->Gspos("QBE0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
608 ptube[2] = hlenQb24[1];
609 dz = dz + kdzb + ptube[2];
610 gMC->Gsposp("QB24", 2 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
621 gMC->Gsvolu("QFA0","TUBE", idtmed[kInox], ptube, 3);
623 gMC->Gspos("QFA0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
629 ptube[2] = hlenQb24[2];
631 gMC->Gsposp("QB24", 3 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
633 // --- Place the PIPE ghost volume (QBPM) in its mother volume (ALIC)
634 // by rotating it to 180 deg. and make it invisible
636 gMC->Gspos("QBPM",1,"ALIC", 0, 0, 0, 0, "ONLY");
637 gMC->Gsbool("QBPM", "L3DX");
638 gMC->Gsbool("QBPM", "L3O3");
639 gMC->Gsbool("QBPM", "L3O4");
643 // ******** Ion Pump volume description starts here ******
650 gMC->Gsvolu("QI32","BOX", idtmed[kInox], pbox, 3);
655 gMC->Gsvolu("QI42","BOX", idtmed[kGetter], pbox, 3);
656 gMC->Gspos("QI42", 1, "QI32", 0.0, 0.0, 0.0, 0, "ONLY");
662 gMC->Gsvolu("QI33","TUBE", idtmed[kInox], ptube, 3);
668 gMC->Gsvolu("QI43","TUBE", idtmed[kAir], ptube, 3);
669 gMC->Gspos("QI43", 1, "QI33", 0.0, 0.0, 0.0, 0, "ONLY");
671 // Connecting tube ->
675 gMC->Gsvolu("QI34","TUBE", idtmed[kInox], ptube, 3);
680 gMC->Gsvolu("QI44","TUBE", idtmed[kAir], ptube, 3);
681 gMC->Gspos("QI44", 1, "QI34", 0.0, 0.0, 0.0, 0, "ONLY");
689 gMC->Gsvolu("QI35","TUBE", idtmed[kInox], ptube, 3);
691 gMC->Gspos("QI32", 1, "QBPM", 0.0, -44.25, zPump, 0, "ONLY");
692 gMC->Gspos("QI33", 1, "QBPM", 0.0, -35.00, zPump,idrotm[2002], "ONLY");
693 gMC->Gspos("QI34", 1, "QBPM", 0.0, -17.90, zPump,idrotm[2002], "ONLY");
694 gMC->Gspos("QI35", 1, "QBPM", 0.0, -24.35, zPump,idrotm[2002], "ONLY");
696 gMC->Gsatt("QBPM", "SEEN", 1);
697 gMC->Gsatt("QBEM", "SEEN", 1);
702 //___________________________________________
703 void AliPIPEv0::CreateMaterials()
706 // Define materials for beam pipe
709 if(fDebug) printf("%s: Create PIPEv0 materials \n",ClassName());
710 Int_t isxfld = gAlice->Field()->Integ();
711 Float_t sxmgmx = gAlice->Field()->Max();
713 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
714 Float_t zsteel[4] = { 26.,24.,28.,14. };
715 Float_t wsteel[4] = { .715,.18,.1,.005 };
717 Float_t aAlBe[2] = { 26.98, 9.01};
718 Float_t zAlBe[2] = { 13.00, 4.00};
719 Float_t wAlBe[2] = { 0.4, 0.6};
722 Float_t aPA[4] = {16., 14., 12., 1.};
723 Float_t zPA[4] = { 8., 7., 6., 1.};
724 Float_t wPA[4] = { 1., 1., 6., 11.};
728 AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
731 AliMaterial(6, "CARBON$ ", 12.01, 6., 2.265, 18.8, 49.9);
734 AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
737 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
740 AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
743 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
745 // reduced density steel to approximate pump getter material
746 AliMixture(20, "GETTER$", asteel, zsteel, 1.00, 4, wsteel);
749 AliMixture(21, "AlBe$", aAlBe, zAlBe, 2.07, 2, wAlBe);
752 AliMixture(22, "PA$", aPA, zPA, 1.14, -4, wPA);
756 // Defines tracking media parameters.
758 Float_t epsil = .001; // Tracking precision,
759 Float_t stemax = -0.01; // Maximum displacement for multiple scat
760 Float_t tmaxfd = -20.; // Maximum angle due to field deflection
761 Float_t deemax = -.3; // Maximum fractional energy loss, DLS
767 AliMedium(5, "BE", 5, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
770 AliMedium(6, "C", 6, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
773 AliMedium(9, "ALU", 9, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
776 AliMedium(15, "AIR", 15, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
779 AliMedium(16, "VACUUM", 16, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
782 AliMedium(19, "INOX", 19, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
785 AliMedium(20, "GETTER", 20, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
788 AliMedium(21, "AlBe" , 21, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
791 AliMedium(22, "PA" , 22, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);