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>
26 #include <TGeoGlobalMagField.h>
28 #include <TVirtualMC.h>
32 #include "AliPIPEv0.h"
39 //_____________________________________________________________________________
40 AliPIPEv0::AliPIPEv0():
46 //_____________________________________________________________________________
47 AliPIPEv0::AliPIPEv0(const char *name, const char *title)
48 : AliPIPE(name,title),
55 //___________________________________________
56 void AliPIPEv0::CreateGeometry()
60 <img src="picts/pipe.gif">
67 <img src="picts/tree_pipe.gif">
71 AliDebugClass(1,"Create PIPEv0 geometry");
74 Int_t *idtmed = fIdtmed->GetArray();
75 Float_t ppcon[90], ptube[3], pbox[3];
80 AliMatrix(idrotm[2001],90.,240., 0., 0., 90.,150.);
81 AliMatrix(idrotm[2002],90., 0., 0., 0., 90.,270.);
82 AliMatrix(idrotm[2003],90.,120., 0., 0., 90., 30.);
83 AliMatrix(idrotm[2004],90.,315., 90., 45., 0., 0.);
84 AliMatrix(idrotm[2005],90.,270., 90., 0., 0., 0.);
85 AliMatrix(idrotm[2006],90.,225., 90.,315., 0., 0.);
86 AliMatrix(idrotm[2007],90.,180., 90.,270., 0., 0.);
87 AliMatrix(idrotm[2008],90.,135., 90.,225., 0., 0.);
88 AliMatrix(idrotm[2009],90., 90., 90.,180., 0., 0.);
89 AliMatrix(idrotm[2010],90., 45., 90.,135., 0., 0.);
91 AliMatrix(idrotm[2012],90.,180., 90., 90.,180., 0.);
92 AliMatrix(idrotm[2013],90., 0., 90., 90.,180., 0.);
96 // distance between bellows
97 // total size of bellow section
98 const Float_t kdzb = 14.6;
99 // size of undulated region
103 // distance between bellows
104 const Float_t kdzbbA = 4.6;
105 // total size of bellow section
106 const Float_t kdzbA = 14.6;
107 // size of undulated region
108 const Float_t kdzubA = 3.75;
110 // half-lengths of various beam pipe sections
112 Float_t hlenQbbe1 = 40.;
113 Float_t hlenQbbe2 = 36.5;
114 Float_t hlenQbbe = (hlenQbbe1+hlenQbbe2)/2.;
117 // Float_t hlenQbt1 = 5.5/2.;
119 // Pipe outside central region (non-absorber side)
120 Float_t hlenQbab = 157.5 + 23./2.;
122 // Flange non-absorber side
123 Float_t hlenQb29 = 11.5/2.+1.75 + 5.0;
126 Float_t hlenQbe0 = kdzbA;
128 // Inox pipe between Be and Bellow (absorber side)
129 Float_t hlenQb24[3] = {11.3/2., 1.8, 3.3};
132 Float_t hlenQb28 = (800.-hlenQbbe1-2.*hlenQbab-4.*hlenQb29-2.*hlenQbe0)/2.;
134 // Position of the pump
135 Float_t zPump = hlenQbbe1+2.*hlenQbab+2.*hlenQb29+kdzb;
137 // Inner beam pipe radius
139 const Float_t kRinBe = 2.9;
141 const Float_t kRinSt = 2.9;
143 const Float_t kRinSB = 2.92;
145 // Outer beam pipe radius
147 const Float_t kRoutBe = 2.98;
149 const Float_t kRoutSt = 2.98;
151 const Float_t kRoutSB = 3.00;
157 // The peam pipe up to the Front Absorber
159 // Mother Volume QBPM
176 ppcon[12] = -90+2.*hlenQb24[2]+2.8+2.*hlenQb24[1];
180 ppcon[15] = ppcon[12];
184 ppcon[18] = ppcon[15] + 2.5 + 2.*kdzubA+0.2;
188 ppcon[21] = ppcon[18];
192 ppcon[24] = ppcon[21] + 2.* kdzbbA-0.4;
196 ppcon[27] = ppcon[24];
216 ppcon[42] = hlenQbbe1+2.*hlenQbab-0.1;
220 ppcon[45] = ppcon[42];
224 ppcon[48] = ppcon[45]+2.*hlenQb29-5.;
228 ppcon[51] = ppcon[48];
232 ppcon[54] = ppcon[51]+2.*kdzb+10.;
236 ppcon[57] = ppcon[54];
244 gMC->Gsvolu("QBPM", "PCON", idtmed[kAir], ppcon,63);
248 // volume definitions of various sections
253 gMC->Gsvolu("QBVA","TUBE", idtmed[kVac], ptube, 0);
256 ptube[2] = (90.-hlenQbbe2)/2.;
257 dz = -90. + ptube[2];
258 gMC->Gsposp ("QBVA", 1, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
262 ptube[2] = hlenQbbe+hlenQbab;
264 gMC->Gsposp ("QBVA", 2, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
268 ptube[2] = (800.-hlenQbbe1-2.*hlenQbab)/2.;
270 gMC->Gsposp ("QBVA", 3, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
273 // Be Pipe in central Alice
278 gMC->Gsvolu("QBBE","TUBE", idtmed[kBe], ptube, 3);
287 gMC->Gsvolu("QBSR", "TUBE", idtmed[kAlu], ptube,3);
291 gMC->Gsvolu("QBSS", "TUBE", idtmed[kPA], ptube,3);
292 gMC->Gspos("QBSS", 1, "QBSR", 0.0, 0.0, 0.0, 0, "ONLY");
294 gMC->Gspos("QBSR", 1, "QBPM", 0.0, 0.0, 40., 0, "ONLY");
295 gMC->Gspos("QBSR", 2, "QBPM", 0.0, 0.0, 150., 0, "ONLY");
296 gMC->Gspos("QBSR", 3, "QBPM", 0.0, 0.0, 260., 0, "ONLY");
297 gMC->Gspos("QBSR", 4, "QBPM", 0.0, 0.0,- 46., 0, "ONLY");
299 // Flange and Fixed Point: non absorber side
308 ppcon[3] = -hlenQb29;
312 ppcon[6] = ppcon[3]+3.6;
320 ppcon[12] = hlenQb29;
324 gMC->Gsvolu("QB29", "PCON", idtmed[kAir], ppcon,15);
331 gMC->Gsvolu("QF29","TUBE", idtmed[kInox], ptube, 3);
332 gMC->Gspos("QF29", 1, "QB29", 0.0, 0.0, -hlenQb29+1.75, 0, "ONLY");
337 gMC->Gsvolu("QS29","TUBE", idtmed[kInox], ptube, 3);
338 gMC->Gspos("QS29", 1, "QB29", 0.0, 0.0, 0., 0, "ONLY");
343 gMC->Gsvolu("QP29","TUBE", idtmed[kInox], ptube, 3);
344 gMC->Gspos("QP29", 1, "QB29", 0.0, 0.0, -hlenQb29+9.75+3., 0, "ONLY");
348 // Inox beam pipe: final section on non-absorber side
354 gMC->Gsvolu("QB28","TUBE", idtmed[kInox], ptube, 3);
357 // Air with high transport cuts outside QB28
362 gMC->Gsvolu("QA28","TUBE", idtmed[kAirHigh], ptube, 3);
363 gMC->Gsatt("QA28", "SEEN", 0);
364 // Al-Be (40-60 wgt%, rho=2.7 g/cm**3) beam pipe
366 // This section is under study (A.M. 1/2/2002)
370 if (fPipeMaterial == kAlu) {
372 } else if (fPipeMaterial == kBe) {
374 } else if (fPipeMaterial == kInox){
379 gMC->Gsvolu("QBAB","TUBE", idtmed[fPipeMaterial], ptube, 3);
381 // 2.5 mm thick SS tube for hanging pump
387 gMC->Gsvolu("QB26","TUBE", idtmed[kInox], ptube, 3);
394 Float_t pconQBE0[33];
399 pconQBE0[ 3] = -kdzbA;
400 pconQBE0[ 4] = kRinSB;
401 pconQBE0[ 5] = kRoutSB;
403 pconQBE0[ 6] = -kdzbA+2.5;
404 pconQBE0[ 7] = kRinSB;
405 pconQBE0[ 8] = kRoutSB;
407 pconQBE0[ 9] = -kdzbA+2.5;
408 pconQBE0[10] = kRinSB;
411 pconQBE0[12] = -kdzbA+2.5+2.*kdzubA;
412 pconQBE0[13] = kRinSB;
415 pconQBE0[15] = -kdzbA+2.5+2.*kdzubA;
416 pconQBE0[16] = kRinSB;
417 pconQBE0[17] = kRoutSB;
419 pconQBE0[18] = -kdzbA+2.5+2.*kdzubA+2.*kdzbbA;
420 pconQBE0[19] = kRinSB;
421 pconQBE0[20] = kRoutSB;
423 pconQBE0[21] = -kdzbA+2.5+2.*kdzubA+2.*kdzbbA;
424 pconQBE0[22] = kRinSB;
427 pconQBE0[24] = -kdzbA+2.5+4.*kdzubA+2.*kdzbbA;
428 pconQBE0[25] = kRinSB;
431 pconQBE0[27] = -kdzbA+2.5+4.*kdzubA+2.*kdzbbA;
432 pconQBE0[28] = kRinSB;
433 pconQBE0[29] = kRoutSB;
435 pconQBE0[30] = -kdzbA+5.0+4.*kdzubA+2.*kdzbbA;
436 pconQBE0[31] = kRinSB;
437 pconQBE0[32] = kRoutSB;
439 gMC->Gsvolu("QBE0", "PCON", idtmed[kAir], pconQBE0, 33);
441 // Undulated piece mother
445 gMC->Gsvolu("QBEM","TUBE", idtmed[kAir], ptube, 3);
446 dz = -kdzbA+kdzubA+2.5;
447 gMC->Gspos("QBEM", 2 ,"QBE0", 0.0, 0.0, dz, 0 , "ONLY");
448 gMC->Gspos("QBEM", 1 ,"QBE0", 0.0, 0.0, -dz, idrotm[2012], "ONLY");
452 Float_t ur = 2.*kdzubA-36.*uw;
462 pund[ 5] = kRinSB+uw;
472 pund[12] = pund[9]+uw;
480 pund[18] = pund[12]+uz;
488 pund[24] = pund[21]+uw;
492 gMC->Gsvolu("QBEU", "PCON", idtmed[kInox], pund, 27);
494 for (i = 0; i < 18; i++)
496 dz = -kdzubA+(1+2*i)*ut;
497 gMC->Gspos("QBEU", i+1 ,"QBEM", 0.0, 0.0, dz, 0 , "ONLY");
500 ptube[1] = kRinSB+uw;
502 gMC->Gsvolu("QBEW","TUBE", idtmed[kInox], ptube, 3);
503 gMC->Gspos("QBEW", 1 ,"QBEM", 0.0, 0.0, kdzubA-uz, 0 , "ONLY");
507 gMC->Gsvolu("QBEP","TUBE", idtmed[kInox], ptube, 0);
511 gMC->Gsposp("QBEP", 1 ,"QBE0", 0.0, 0.0, -kdzbA+1.25, 0 , "ONLY", ptube, 3);
512 gMC->Gsposp("QBEP", 2 ,"QBE0", 0.0, 0.0, kdzbA-1.25, 0 , "ONLY", ptube, 3);
514 gMC->Gsposp("QBEP", 3 ,"QBE0", 0.0, 0.0, 0., 0 , "ONLY", ptube, 3);
519 // **** Placement of various sections on non-absorber side ****
522 // first the beryllium section
523 Float_t zpos = -(hlenQbbe2-hlenQbbe1)/2;
524 gMC->Gspos("QBBE", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
526 // next meta-metal transition QBT1 on on-absorber side
527 // zpos = zpos + hlenQbbe + hlenQbt1;
528 // gMC->Gspos("QBT1", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
530 // Aluminium OR Al-be alloy section
531 zpos = hlenQbbe1+hlenQbab;
532 gMC->Gspos("QBAB", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
534 // inox flange at the start of bellow
535 zpos = zpos + hlenQbab + hlenQb29;
536 gMC->Gspos("QB29", 1, "QBPM", 0.0, 0.0, zpos, idrotm[2012], "ONLY");
539 zpos = zpos + hlenQb29 + hlenQbe0;
540 gMC->Gspos("QBE0", 2 ,"QBPM", 0.0, 0.0, zpos, 0, "ONLY");
542 // inox flange at the end of bellow and start of thick inox for pump
543 zpos = zpos + hlenQbe0 + hlenQb29;
544 gMC->Gspos("QB29", 2, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
546 //last inox section till 800 cm
547 zpos = zpos + hlenQb29 + hlenQb28;
548 gMC->Gspos("QB28", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
549 gMC->Gspos("QA28", 1, "ALIC", 0.0, 0.0, zpos, 0, "ONLY");
551 //******** end of placement on non-absorber side *********
553 // **** Absorber side *****
557 // Beam pipes between elements
559 gMC->Gsvolu("QB24","TUBE", idtmed[kInox], ptube, 0);
562 ptube[2] = hlenQb24[0];
568 bpbe[ 3] = -hlenQb24[0];
572 bpbe[ 6] = hlenQb24[0] - 5.8;
576 bpbe[ 9] = hlenQb24[0] - 5.8;
580 bpbe[12] = hlenQb24[0] - 4.5;
584 bpbe[15] = hlenQb24[0] - 4.5;
588 bpbe[18] = hlenQb24[0] - 3.5;
592 bpbe[21] = hlenQb24[0] - 3.5;
596 bpbe[24] = hlenQb24[0] - 3.0;
600 bpbe[27] = hlenQb24[0] - 3.0;
604 bpbe[30] = hlenQb24[0];
608 gMC->Gsvolu("QA24","PCON", idtmed[kInox], bpbe, 33);
610 dz = hlenQbbe2 + hlenQb24[0];
612 gMC->Gspos("QA24", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
614 // Bellow on absorber side
616 dz = dz+hlenQb24[0] + kdzbA;
617 gMC->Gspos("QBE0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
619 ptube[2] = hlenQb24[1];
620 dz = dz + kdzb + ptube[2];
621 gMC->Gsposp("QB24", 2 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
632 gMC->Gsvolu("QFA0","TUBE", idtmed[kInox], ptube, 3);
634 gMC->Gspos("QFA0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
640 ptube[2] = hlenQb24[2];
642 gMC->Gsposp("QB24", 3 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
644 // --- Place the PIPE ghost volume (QBPM) in its mother volume (ALIC)
645 // by rotating it to 180 deg. and make it invisible
647 gMC->Gspos("QBPM",1,"ALIC", 0, 0, 0, 0, "ONLY");
648 gMC->Gsbool("QBPM", "L3DX");
649 gMC->Gsbool("QBPM", "L3O3");
650 gMC->Gsbool("QBPM", "L3O4");
654 // ******** Ion Pump volume description starts here ******
661 gMC->Gsvolu("QI32","BOX", idtmed[kInox], pbox, 3);
666 gMC->Gsvolu("QI42","BOX", idtmed[kGetter], pbox, 3);
667 gMC->Gspos("QI42", 1, "QI32", 0.0, 0.0, 0.0, 0, "ONLY");
673 gMC->Gsvolu("QI33","TUBE", idtmed[kInox], ptube, 3);
679 gMC->Gsvolu("QI43","TUBE", idtmed[kAir], ptube, 3);
680 gMC->Gspos("QI43", 1, "QI33", 0.0, 0.0, 0.0, 0, "ONLY");
682 // Connecting tube ->
686 gMC->Gsvolu("QI34","TUBE", idtmed[kInox], ptube, 3);
691 gMC->Gsvolu("QI44","TUBE", idtmed[kAir], ptube, 3);
692 gMC->Gspos("QI44", 1, "QI34", 0.0, 0.0, 0.0, 0, "ONLY");
700 gMC->Gsvolu("QI35","TUBE", idtmed[kInox], ptube, 3);
702 gMC->Gspos("QI32", 1, "QBPM", 0.0, -44.25, zPump, 0, "ONLY");
703 gMC->Gspos("QI33", 1, "QBPM", 0.0, -35.00, zPump,idrotm[2002], "ONLY");
704 gMC->Gspos("QI34", 1, "QBPM", 0.0, -17.90, zPump,idrotm[2002], "ONLY");
705 gMC->Gspos("QI35", 1, "QBPM", 0.0, -24.35, zPump,idrotm[2002], "ONLY");
707 gMC->Gsatt("QBPM", "SEEN", 1);
708 gMC->Gsatt("QBEM", "SEEN", 1);
713 //___________________________________________
714 void AliPIPEv0::CreateMaterials()
717 // Define materials for beam pipe
720 AliDebugClass(1,"Create PIPEv0 materials");
721 Int_t isxfld = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Integ();
722 Float_t sxmgmx = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Max();
724 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
725 Float_t zsteel[4] = { 26.,24.,28.,14. };
726 Float_t wsteel[4] = { .715,.18,.1,.005 };
728 Float_t aAlBe[2] = { 26.98, 9.01};
729 Float_t zAlBe[2] = { 13.00, 4.00};
730 Float_t wAlBe[2] = { 0.4, 0.6};
733 Float_t aPA[4] = {16., 14., 12., 1.};
734 Float_t zPA[4] = { 8., 7., 6., 1.};
735 Float_t wPA[4] = { 1., 1., 6., 11.};
739 Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
740 Float_t zAir[4]={6.,7.,8.,18.};
741 Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
742 Float_t dAir = 1.20479E-3;
743 Float_t dAir1 = 1.20479E-10;
747 Float_t aKapton[4]={1.00794,12.0107, 14.010,15.9994};
748 Float_t zKapton[4]={1.,6.,7.,8.};
749 Float_t wKapton[4]={0.026362,0.69113,0.07327,0.209235};
750 Float_t dKapton = 1.42;
753 AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
756 AliMaterial(6, "CARBON$ ", 12.01, 6., 2.265, 18.8, 49.9);
759 AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
762 AliMixture(15, "AIR$", aAir, zAir, dAir, 4, wAir);
763 AliMixture(35, "AIR_HIGH$", aAir, zAir, dAir, 4, wAir);
766 AliMixture(16, "VACUUM$ ", aAir, zAir, dAir1, 4, wAir);
769 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
771 // reduced density steel to approximate pump getter material
772 AliMixture(20, "GETTER$", asteel, zsteel, 1.00, 4, wsteel);
775 AliMixture(21, "AlBe$", aAlBe, zAlBe, 2.07, 2, wAlBe);
778 AliMixture(22, "PA$", aPA, zPA, 1.14, -4, wPA);
781 AliMixture(23, "KAPTON", aKapton, zKapton, dKapton, 4, wKapton);
784 // Defines tracking media parameters.
786 Float_t epsil = .001; // Tracking precision,
787 Float_t stemax = -0.01; // Maximum displacement for multiple scat
788 Float_t tmaxfd = -20.; // Maximum angle due to field deflection
789 Float_t deemax = -.3; // Maximum fractional energy loss, DLS
795 AliMedium(5, "BE", 5, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
798 AliMedium(6, "C", 6, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
801 AliMedium(9, "ALU", 9, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
804 AliMedium(15, "AIR", 15, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
805 AliMedium(35, "AIR_HIFG",35, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
808 AliMedium(16, "VACUUM", 16, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
811 AliMedium(19, "INOX", 19, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
814 AliMedium(20, "GETTER", 20, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
817 AliMedium(21, "AlBe" , 21, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
820 AliMedium(22, "PA" , 22, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
823 AliMedium(23, "KAPTON", 23, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);