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"
38 //_____________________________________________________________________________
39 AliPIPEv0::AliPIPEv0():
45 //_____________________________________________________________________________
46 AliPIPEv0::AliPIPEv0(const char *name, const char *title)
47 : AliPIPE(name,title),
54 //___________________________________________
55 void AliPIPEv0::CreateGeometry()
59 <img src="picts/pipe.gif">
66 <img src="picts/tree_pipe.gif">
70 AliDebugClass(1,"Create PIPEv0 geometry");
73 Int_t *idtmed = fIdtmed->GetArray();
74 Float_t ppcon[90], ptube[3], pbox[3];
79 AliMatrix(idrotm[2001],90.,240., 0., 0., 90.,150.);
80 AliMatrix(idrotm[2002],90., 0., 0., 0., 90.,270.);
81 AliMatrix(idrotm[2003],90.,120., 0., 0., 90., 30.);
82 AliMatrix(idrotm[2004],90.,315., 90., 45., 0., 0.);
83 AliMatrix(idrotm[2005],90.,270., 90., 0., 0., 0.);
84 AliMatrix(idrotm[2006],90.,225., 90.,315., 0., 0.);
85 AliMatrix(idrotm[2007],90.,180., 90.,270., 0., 0.);
86 AliMatrix(idrotm[2008],90.,135., 90.,225., 0., 0.);
87 AliMatrix(idrotm[2009],90., 90., 90.,180., 0., 0.);
88 AliMatrix(idrotm[2010],90., 45., 90.,135., 0., 0.);
90 AliMatrix(idrotm[2012],90.,180., 90., 90.,180., 0.);
91 AliMatrix(idrotm[2013],90., 0., 90., 90.,180., 0.);
95 // distance between bellows
96 // total size of bellow section
97 const Float_t kdzb = 14.6;
98 // size of undulated region
102 // distance between bellows
103 const Float_t kdzbbA = 4.6;
104 // total size of bellow section
105 const Float_t kdzbA = 14.6;
106 // size of undulated region
107 const Float_t kdzubA = 3.75;
109 // half-lengths of various beam pipe sections
111 Float_t hlenQbbe1 = 40.;
112 Float_t hlenQbbe2 = 36.5;
113 Float_t hlenQbbe = (hlenQbbe1+hlenQbbe2)/2.;
116 // Float_t hlenQbt1 = 5.5/2.;
118 // Pipe outside central region (non-absorber side)
119 Float_t hlenQbab = 157.5 + 23./2.;
121 // Flange non-absorber side
122 Float_t hlenQb29 = 11.5/2.+1.75 + 5.0;
125 Float_t hlenQbe0 = kdzbA;
127 // Inox pipe between Be and Bellow (absorber side)
128 Float_t hlenQb24[3] = {11.3/2., 1.8, 3.3};
131 Float_t hlenQb28 = (800.-hlenQbbe1-2.*hlenQbab-4.*hlenQb29-2.*hlenQbe0)/2.;
133 // Position of the pump
134 Float_t zPump = hlenQbbe1+2.*hlenQbab+2.*hlenQb29+kdzb;
136 // Inner beam pipe radius
138 const Float_t kRinBe = 2.9;
140 const Float_t kRinSt = 2.9;
142 const Float_t kRinSB = 2.92;
144 // Outer beam pipe radius
146 const Float_t kRoutBe = 2.98;
148 const Float_t kRoutSt = 2.98;
150 const Float_t kRoutSB = 3.00;
156 // The peam pipe up to the Front Absorber
158 // Mother Volume QBPM
175 ppcon[12] = -90+2.*hlenQb24[2]+2.8+2.*hlenQb24[1];
179 ppcon[15] = ppcon[12];
183 ppcon[18] = ppcon[15] + 2.5 + 2.*kdzubA+0.2;
187 ppcon[21] = ppcon[18];
191 ppcon[24] = ppcon[21] + 2.* kdzbbA-0.4;
195 ppcon[27] = ppcon[24];
215 ppcon[42] = hlenQbbe1+2.*hlenQbab-0.1;
219 ppcon[45] = ppcon[42];
223 ppcon[48] = ppcon[45]+2.*hlenQb29-5.;
227 ppcon[51] = ppcon[48];
231 ppcon[54] = ppcon[51]+2.*kdzb+10.;
235 ppcon[57] = ppcon[54];
243 gMC->Gsvolu("QBPM", "PCON", idtmed[kAir], ppcon,63);
247 // volume definitions of various sections
252 gMC->Gsvolu("QBVA","TUBE", idtmed[kVac], ptube, 0);
255 ptube[2] = (90.-hlenQbbe2)/2.;
256 dz = -90. + ptube[2];
257 gMC->Gsposp ("QBVA", 1, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
261 ptube[2] = hlenQbbe+hlenQbab;
263 gMC->Gsposp ("QBVA", 2, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
267 ptube[2] = (800.-hlenQbbe1-2.*hlenQbab)/2.;
269 gMC->Gsposp ("QBVA", 3, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
272 // Be Pipe in central Alice
277 gMC->Gsvolu("QBBE","TUBE", idtmed[kBe], ptube, 3);
286 gMC->Gsvolu("QBSR", "TUBE", idtmed[kAlu], ptube,3);
290 gMC->Gsvolu("QBSS", "TUBE", idtmed[kPA], ptube,3);
291 gMC->Gspos("QBSS", 1, "QBSR", 0.0, 0.0, 0.0, 0, "ONLY");
293 gMC->Gspos("QBSR", 1, "QBPM", 0.0, 0.0, 40., 0, "ONLY");
294 gMC->Gspos("QBSR", 2, "QBPM", 0.0, 0.0, 150., 0, "ONLY");
295 gMC->Gspos("QBSR", 3, "QBPM", 0.0, 0.0, 260., 0, "ONLY");
296 gMC->Gspos("QBSR", 4, "QBPM", 0.0, 0.0,- 46., 0, "ONLY");
298 // Flange and Fixed Point: non absorber side
307 ppcon[3] = -hlenQb29;
311 ppcon[6] = ppcon[3]+3.6;
319 ppcon[12] = hlenQb29;
323 gMC->Gsvolu("QB29", "PCON", idtmed[kAir], ppcon,15);
330 gMC->Gsvolu("QF29","TUBE", idtmed[kInox], ptube, 3);
331 gMC->Gspos("QF29", 1, "QB29", 0.0, 0.0, -hlenQb29+1.75, 0, "ONLY");
336 gMC->Gsvolu("QS29","TUBE", idtmed[kInox], ptube, 3);
337 gMC->Gspos("QS29", 1, "QB29", 0.0, 0.0, 0., 0, "ONLY");
342 gMC->Gsvolu("QP29","TUBE", idtmed[kInox], ptube, 3);
343 gMC->Gspos("QP29", 1, "QB29", 0.0, 0.0, -hlenQb29+9.75+3., 0, "ONLY");
347 // Inox beam pipe: final section on non-absorber side
353 gMC->Gsvolu("QB28","TUBE", idtmed[kInox], ptube, 3);
356 // Al-Be (40-60 wgt%, rho=2.7 g/cm**3) beam pipe
358 // This section is under study (A.M. 1/2/2002)
362 if (fPipeMaterial == kAlu) {
364 } else if (fPipeMaterial == kBe) {
366 } else if (fPipeMaterial == kInox){
371 gMC->Gsvolu("QBAB","TUBE", idtmed[fPipeMaterial], ptube, 3);
373 // 2.5 mm thick SS tube for hanging pump
379 gMC->Gsvolu("QB26","TUBE", idtmed[kInox], ptube, 3);
386 Float_t pconQBE0[33];
391 pconQBE0[ 3] = -kdzbA;
392 pconQBE0[ 4] = kRinSB;
393 pconQBE0[ 5] = kRoutSB;
395 pconQBE0[ 6] = -kdzbA+2.5;
396 pconQBE0[ 7] = kRinSB;
397 pconQBE0[ 8] = kRoutSB;
399 pconQBE0[ 9] = -kdzbA+2.5;
400 pconQBE0[10] = kRinSB;
403 pconQBE0[12] = -kdzbA+2.5+2.*kdzubA;
404 pconQBE0[13] = kRinSB;
407 pconQBE0[15] = -kdzbA+2.5+2.*kdzubA;
408 pconQBE0[16] = kRinSB;
409 pconQBE0[17] = kRoutSB;
411 pconQBE0[18] = -kdzbA+2.5+2.*kdzubA+2.*kdzbbA;
412 pconQBE0[19] = kRinSB;
413 pconQBE0[20] = kRoutSB;
415 pconQBE0[21] = -kdzbA+2.5+2.*kdzubA+2.*kdzbbA;
416 pconQBE0[22] = kRinSB;
419 pconQBE0[24] = -kdzbA+2.5+4.*kdzubA+2.*kdzbbA;
420 pconQBE0[25] = kRinSB;
423 pconQBE0[27] = -kdzbA+2.5+4.*kdzubA+2.*kdzbbA;
424 pconQBE0[28] = kRinSB;
425 pconQBE0[29] = kRoutSB;
427 pconQBE0[30] = -kdzbA+5.0+4.*kdzubA+2.*kdzbbA;
428 pconQBE0[31] = kRinSB;
429 pconQBE0[32] = kRoutSB;
431 gMC->Gsvolu("QBE0", "PCON", idtmed[kAir], pconQBE0, 33);
433 // Undulated piece mother
437 gMC->Gsvolu("QBEM","TUBE", idtmed[kAir], ptube, 3);
438 dz = -kdzbA+kdzubA+2.5;
439 gMC->Gspos("QBEM", 2 ,"QBE0", 0.0, 0.0, dz, 0 , "ONLY");
440 gMC->Gspos("QBEM", 1 ,"QBE0", 0.0, 0.0, -dz, idrotm[2012], "ONLY");
444 Float_t ur = 2.*kdzubA-36.*uw;
454 pund[ 5] = kRinSB+uw;
464 pund[12] = pund[9]+uw;
472 pund[18] = pund[12]+uz;
480 pund[24] = pund[21]+uw;
484 gMC->Gsvolu("QBEU", "PCON", idtmed[kInox], pund, 27);
486 for (i = 0; i < 18; i++)
488 dz = -kdzubA+(1+2*i)*ut;
489 gMC->Gspos("QBEU", i+1 ,"QBEM", 0.0, 0.0, dz, 0 , "ONLY");
492 ptube[1] = kRinSB+uw;
494 gMC->Gsvolu("QBEW","TUBE", idtmed[kInox], ptube, 3);
495 gMC->Gspos("QBEW", 1 ,"QBEM", 0.0, 0.0, kdzubA-uz, 0 , "ONLY");
499 gMC->Gsvolu("QBEP","TUBE", idtmed[kInox], ptube, 0);
503 gMC->Gsposp("QBEP", 1 ,"QBE0", 0.0, 0.0, -kdzbA+1.25, 0 , "ONLY", ptube, 3);
504 gMC->Gsposp("QBEP", 2 ,"QBE0", 0.0, 0.0, kdzbA-1.25, 0 , "ONLY", ptube, 3);
506 gMC->Gsposp("QBEP", 3 ,"QBE0", 0.0, 0.0, 0., 0 , "ONLY", ptube, 3);
511 // **** Placement of various sections on non-absorber side ****
514 // first the beryllium section
515 Float_t zpos = -(hlenQbbe2-hlenQbbe1)/2;
516 gMC->Gspos("QBBE", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
518 // next meta-metal transition QBT1 on on-absorber side
519 // zpos = zpos + hlenQbbe + hlenQbt1;
520 // gMC->Gspos("QBT1", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
522 // Aluminium OR Al-be alloy section
523 zpos = hlenQbbe1+hlenQbab;
524 gMC->Gspos("QBAB", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
526 // inox flange at the start of bellow
527 zpos = zpos + hlenQbab + hlenQb29;
528 gMC->Gspos("QB29", 1, "QBPM", 0.0, 0.0, zpos, idrotm[2012], "ONLY");
531 zpos = zpos + hlenQb29 + hlenQbe0;
532 gMC->Gspos("QBE0", 2 ,"QBPM", 0.0, 0.0, zpos, 0, "ONLY");
534 // inox flange at the end of bellow and start of thick inox for pump
535 zpos = zpos + hlenQbe0 + hlenQb29;
536 gMC->Gspos("QB29", 2, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
538 //last inox section till 800 cm
539 zpos = zpos + hlenQb29 + hlenQb28;
540 gMC->Gspos("QB28", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
542 //******** end of placement on non-absorber side *********
544 // **** Absorber side *****
548 // Beam pipes between elements
550 gMC->Gsvolu("QB24","TUBE", idtmed[kInox], ptube, 0);
553 ptube[2] = hlenQb24[0];
559 bpbe[ 3] = -hlenQb24[0];
563 bpbe[ 6] = hlenQb24[0] - 5.8;
567 bpbe[ 9] = hlenQb24[0] - 5.8;
571 bpbe[12] = hlenQb24[0] - 4.5;
575 bpbe[15] = hlenQb24[0] - 4.5;
579 bpbe[18] = hlenQb24[0] - 3.5;
583 bpbe[21] = hlenQb24[0] - 3.5;
587 bpbe[24] = hlenQb24[0] - 3.0;
591 bpbe[27] = hlenQb24[0] - 3.0;
595 bpbe[30] = hlenQb24[0];
599 gMC->Gsvolu("QA24","PCON", idtmed[kInox], bpbe, 33);
601 dz = hlenQbbe2 + hlenQb24[0];
603 gMC->Gspos("QA24", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
605 // Bellow on absorber side
607 dz = dz+hlenQb24[0] + kdzbA;
608 gMC->Gspos("QBE0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
610 ptube[2] = hlenQb24[1];
611 dz = dz + kdzb + ptube[2];
612 gMC->Gsposp("QB24", 2 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
623 gMC->Gsvolu("QFA0","TUBE", idtmed[kInox], ptube, 3);
625 gMC->Gspos("QFA0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
631 ptube[2] = hlenQb24[2];
633 gMC->Gsposp("QB24", 3 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
635 // --- Place the PIPE ghost volume (QBPM) in its mother volume (ALIC)
636 // by rotating it to 180 deg. and make it invisible
638 gMC->Gspos("QBPM",1,"ALIC", 0, 0, 0, 0, "ONLY");
639 gMC->Gsbool("QBPM", "L3DX");
640 gMC->Gsbool("QBPM", "L3O3");
641 gMC->Gsbool("QBPM", "L3O4");
645 // ******** Ion Pump volume description starts here ******
652 gMC->Gsvolu("QI32","BOX", idtmed[kInox], pbox, 3);
657 gMC->Gsvolu("QI42","BOX", idtmed[kGetter], pbox, 3);
658 gMC->Gspos("QI42", 1, "QI32", 0.0, 0.0, 0.0, 0, "ONLY");
664 gMC->Gsvolu("QI33","TUBE", idtmed[kInox], ptube, 3);
670 gMC->Gsvolu("QI43","TUBE", idtmed[kAir], ptube, 3);
671 gMC->Gspos("QI43", 1, "QI33", 0.0, 0.0, 0.0, 0, "ONLY");
673 // Connecting tube ->
677 gMC->Gsvolu("QI34","TUBE", idtmed[kInox], ptube, 3);
682 gMC->Gsvolu("QI44","TUBE", idtmed[kAir], ptube, 3);
683 gMC->Gspos("QI44", 1, "QI34", 0.0, 0.0, 0.0, 0, "ONLY");
691 gMC->Gsvolu("QI35","TUBE", idtmed[kInox], ptube, 3);
693 gMC->Gspos("QI32", 1, "QBPM", 0.0, -44.25, zPump, 0, "ONLY");
694 gMC->Gspos("QI33", 1, "QBPM", 0.0, -35.00, zPump,idrotm[2002], "ONLY");
695 gMC->Gspos("QI34", 1, "QBPM", 0.0, -17.90, zPump,idrotm[2002], "ONLY");
696 gMC->Gspos("QI35", 1, "QBPM", 0.0, -24.35, zPump,idrotm[2002], "ONLY");
698 gMC->Gsatt("QBPM", "SEEN", 1);
699 gMC->Gsatt("QBEM", "SEEN", 1);
704 //___________________________________________
705 void AliPIPEv0::CreateMaterials()
708 // Define materials for beam pipe
711 AliDebugClass(1,"Create PIPEv0 materials");
712 Int_t isxfld = gAlice->Field()->Integ();
713 Float_t sxmgmx = gAlice->Field()->Max();
715 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
716 Float_t zsteel[4] = { 26.,24.,28.,14. };
717 Float_t wsteel[4] = { .715,.18,.1,.005 };
719 Float_t aAlBe[2] = { 26.98, 9.01};
720 Float_t zAlBe[2] = { 13.00, 4.00};
721 Float_t wAlBe[2] = { 0.4, 0.6};
724 Float_t aPA[4] = {16., 14., 12., 1.};
725 Float_t zPA[4] = { 8., 7., 6., 1.};
726 Float_t wPA[4] = { 1., 1., 6., 11.};
730 Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
731 Float_t zAir[4]={6.,7.,8.,18.};
732 Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
733 Float_t dAir = 1.20479E-3;
734 Float_t dAir1 = 1.20479E-10;
738 AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
741 AliMaterial(6, "CARBON$ ", 12.01, 6., 2.265, 18.8, 49.9);
744 AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
747 AliMixture(15, "AIR$ ", aAir, zAir, dAir, 4, wAir);
750 AliMixture(16, "VACUUM$ ", aAir, zAir, dAir1, 4, wAir);
753 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
755 // reduced density steel to approximate pump getter material
756 AliMixture(20, "GETTER$", asteel, zsteel, 1.00, 4, wsteel);
759 AliMixture(21, "AlBe$", aAlBe, zAlBe, 2.07, 2, wAlBe);
762 AliMixture(22, "PA$", aPA, zPA, 1.14, -4, wPA);
766 // Defines tracking media parameters.
768 Float_t epsil = .001; // Tracking precision,
769 Float_t stemax = -0.01; // Maximum displacement for multiple scat
770 Float_t tmaxfd = -20.; // Maximum angle due to field deflection
771 Float_t deemax = -.3; // Maximum fractional energy loss, DLS
777 AliMedium(5, "BE", 5, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
780 AliMedium(6, "C", 6, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
783 AliMedium(9, "ALU", 9, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
786 AliMedium(15, "AIR", 15, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
789 AliMedium(16, "VACUUM", 16, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
792 AliMedium(19, "INOX", 19, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
795 AliMedium(20, "GETTER", 20, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
798 AliMedium(21, "AlBe" , 21, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
801 AliMedium(22, "PA" , 22, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);