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 const Float_t kdzbb = 9.0;
95 // total size of bellow section
96 const Float_t kdzb = 15.0;
97 // size of undulated region
98 const Float_t kdzub = 2.0;
100 // half-lengths of various beam pipe sections
102 Float_t hlenQbbe1 = 40.;
103 Float_t hlenQbbe2 = 36.5;
104 Float_t hlenQbbe = (hlenQbbe1+hlenQbbe2)/2.;
107 // Float_t hlenQbt1 = 5.5/2.;
109 // Pipe outside central region (non-absober side)
110 Float_t hlenQbab = 157.5;
112 // Flange non-absorber side
113 Float_t hlenQb29 = 11.5/2.+1.75 + 5.0;
116 Float_t hlenQbe0 = kdzb;
118 // Inox pipe between Be and Bellow (absorber side)
119 Float_t hlenQb24[3] = {10.5/2., 1.8, 3.3};
122 Float_t hlenQb28 = (800.-hlenQbbe1-2.*hlenQbab-4.*hlenQb29-2.*hlenQbe0)/2.;
124 // Position of the pump
125 Float_t zPump = hlenQbbe1+2.*hlenQbab+2.*hlenQb29+kdzb;
127 // Inner beam pipe radius
128 const Float_t kRinBe = 2.9;
129 const Float_t kRinSt = 2.92;
132 const Float_t kRoutBe = 2.98;
133 const Float_t kRoutSt = 3.00;
140 // The peam pipe up to the Front Absorber
142 // Mother Volume QBPM
159 ppcon[12] = -90+2.*hlenQb24[2]+2.8+2.*hlenQb24[1];
163 ppcon[15] = ppcon[12];
167 ppcon[18] = ppcon[15] + 2. + 2.*kdzub+0.2;
171 ppcon[21] = ppcon[18];
175 ppcon[24] = ppcon[21] + 2.* kdzbb-0.4;
179 ppcon[27] = ppcon[24];
199 ppcon[42] = hlenQbbe1+2.*hlenQbab-0.1;
203 ppcon[45] = ppcon[42];
207 ppcon[48] = ppcon[45]+2.*hlenQb29-5.;
211 ppcon[51] = ppcon[48];
215 ppcon[54] = ppcon[51]+2.*kdzb+10.;
219 ppcon[57] = ppcon[54];
227 gMC->Gsvolu("QBPM", "PCON", idtmed[kAir], ppcon,63);
231 // volume definitions of various sections
236 gMC->Gsvolu("QBVA","TUBE", idtmed[kVac], ptube, 0);
239 ptube[2] = (90.-hlenQbbe2)/2.;
240 dz = -90. + ptube[2];
241 gMC->Gsposp ("QBVA", 1, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
245 ptube[2] = hlenQbbe+hlenQbab;
247 gMC->Gsposp ("QBVA", 2, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
251 ptube[2] = (800.-hlenQbbe1-2.*hlenQbab)/2.;
253 gMC->Gsposp ("QBVA", 3, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
256 // Be Pipe in central Alice
261 gMC->Gsvolu("QBBE","TUBE", idtmed[kBe], ptube, 3);
296 gMC->Gsvolu("QBSR", "PCON", idtmed[kC], ppcon,21);
297 gMC->Gspos("QBSR", 1, "QBPM", 0.0, 0.0, 40., 0, "ONLY");
298 gMC->Gspos("QBSR", 2, "QBPM", 0.0, 0.0, 150., 0, "ONLY");
299 gMC->Gspos("QBSR", 3, "QBPM", 0.0, 0.0, 260., 0, "ONLY");
300 gMC->Gspos("QBSR", 4, "QBPM", 0.0, 0.0,- 46., 0, "ONLY");
302 // Flange and Fixed Point: non absorber side
311 ppcon[3] = -hlenQb29;
315 ppcon[6] = ppcon[3]+3.6;
323 ppcon[12] = hlenQb29;
327 gMC->Gsvolu("QB29", "PCON", idtmed[kAir], ppcon,15);
334 gMC->Gsvolu("QF29","TUBE", idtmed[kInox], ptube, 3);
335 gMC->Gspos("QF29", 1, "QB29", 0.0, 0.0, -hlenQb29+1.75, 0, "ONLY");
340 gMC->Gsvolu("QS29","TUBE", idtmed[kInox], ptube, 3);
341 gMC->Gspos("QS29", 1, "QB29", 0.0, 0.0, 0., 0, "ONLY");
346 gMC->Gsvolu("QP29","TUBE", idtmed[kInox], ptube, 3);
347 gMC->Gspos("QP29", 1, "QB29", 0.0, 0.0, -hlenQb29+9.75+3., 0, "ONLY");
351 // Inox beam pipe: final section on non-absorber side
357 gMC->Gsvolu("QB28","TUBE", idtmed[kInox], ptube, 3);
360 // Al-Be (40-60 wgt%, rho=2.7 g/cm**3) beam pipe
362 // This section is under study (A.M. 1/2/2002)
366 if (fPipeMaterial == kAlu) {
368 } else if (fPipeMaterial == kBe) {
370 } else if (fPipeMaterial == kInox){
375 gMC->Gsvolu("QBAB","TUBE", idtmed[fPipeMaterial], ptube, 3);
377 // 2.5 mm thick SS tube for hanging pump
383 gMC->Gsvolu("QB26","TUBE", idtmed[kInox], ptube, 3);
390 Float_t pconQBE0[33];
396 pconQBE0[ 4]= kRinSt;
397 pconQBE0[ 5]= kRoutSt;
399 pconQBE0[ 6]= -kdzb+2.;
400 pconQBE0[ 7]= kRinSt;
401 pconQBE0[ 8]= kRoutSt;
403 pconQBE0[ 9]= -kdzb+2.;
404 pconQBE0[10]= kRinSt;
407 pconQBE0[12]= -kdzb+2.+2.*kdzub;
408 pconQBE0[13]= kRinSt;
411 pconQBE0[15]= -kdzb+2.+2.*kdzub;
412 pconQBE0[16]= kRinSt;
413 pconQBE0[17]= kRoutSt;
415 pconQBE0[18]= -kdzb+2.+2.*kdzub+2.*kdzbb;
416 pconQBE0[19]= kRinSt;
417 pconQBE0[20]= kRoutSt;
419 pconQBE0[21]= -kdzb+2.+2.*kdzub+2.*kdzbb;
420 pconQBE0[22]= kRinSt;
423 pconQBE0[24]= -kdzb+2.+4.*kdzub+2.*kdzbb;
424 pconQBE0[25]= kRinSt;
427 pconQBE0[27]= -kdzb+2.+4.*kdzub+2.*kdzbb;
428 pconQBE0[28]= kRinSt;
429 pconQBE0[29]= kRoutSt;
432 pconQBE0[31]= kRinSt;
433 pconQBE0[32]= kRoutSt;
434 gMC->Gsvolu("QBE0", "PCON", idtmed[kAir], pconQBE0, 33);
436 // Undulated piece mother
440 gMC->Gsvolu("QBEM","TUBE", idtmed[kAir], ptube, 3);
442 gMC->Gspos("QBEM", 2 ,"QBE0", 0.0, 0.0, dz, 0 , "ONLY");
443 gMC->Gspos("QBEM", 1 ,"QBE0", 0.0, 0.0, -dz, idrotm[2012], "ONLY");
447 Float_t ur = 2.*kdzub-12.*uw;
457 pund[ 5] = kRinSt+uw;
467 pund[12] = pund[9]+uw;
475 pund[18] = pund[12]+uz;
483 pund[24] = pund[21]+uw;
487 gMC->Gsvolu("QBEU", "PCON", idtmed[kInox], pund, 27);
489 for (i = 0; i < 6; i++)
491 dz = -kdzub+(1+2*i)*ut;
492 gMC->Gspos("QBEU", i+1 ,"QBEM", 0.0, 0.0, dz, 0 , "ONLY");
495 ptube[1] = kRinSt+uw;
497 gMC->Gsvolu("QBEW","TUBE", idtmed[kInox], ptube, 3);
498 gMC->Gspos("QBEW", 1 ,"QBEM", 0.0, 0.0, kdzub-uz, 0 , "ONLY");
501 gMC->Gsvolu("QBEP","TUBE", idtmed[kInox], ptube, 0);
505 gMC->Gsposp("QBEP", 1 ,"QBE0", 0.0, 0.0, -kdzb+1., 0 , "ONLY", ptube, 3);
506 gMC->Gsposp("QBEP", 2 ,"QBE0", 0.0, 0.0, kdzb-1., 0 , "ONLY", ptube, 3);
508 gMC->Gsposp("QBEP", 3 ,"QBE0", 0.0, 0.0, 0., 0 , "ONLY", ptube, 3);
510 // End undulated part
515 // **** Placement of various sections on non-absorber side ****
518 // first the beryllium section
519 Float_t zpos = -(hlenQbbe2-hlenQbbe1)/2;
520 gMC->Gspos("QBBE", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
522 // next meta-metal transition QBT1 on on-absorber side
523 // zpos = zpos + hlenQbbe + hlenQbt1;
524 // gMC->Gspos("QBT1", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
526 // Aluminium OR Al-be alloy section
527 zpos = hlenQbbe1+hlenQbab;
528 gMC->Gspos("QBAB", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
530 // inox flange at the start of bellow
531 zpos = zpos + hlenQbab + hlenQb29;
532 gMC->Gspos("QB29", 1, "QBPM", 0.0, 0.0, zpos, idrotm[2012], "ONLY");
535 zpos = zpos + hlenQb29 + hlenQbe0;
536 gMC->Gspos("QBE0", 2 ,"QBPM", 0.0, 0.0, zpos, 0, "ONLY");
538 // inox flange at the end of bellow and start of thick inox for pump
539 zpos = zpos + hlenQbe0 + hlenQb29;
540 gMC->Gspos("QB29", 2, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
542 //last inox section till 800 cm
543 zpos = zpos + hlenQb29 + hlenQb28;
544 gMC->Gspos("QB28", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
546 //******** end of placement on no-absorber side *********
549 // **** Absorber side *****
553 // metal-metal transition : Be-Alu on absorber side
558 gMC->Gsvolu("QBT2","TUBE", idtmed[kAir], ptube, 3);
560 gMC->Gspos("QBT2", 1, "QBPM", 0., 0., -hlenQbbe-ptube[2], idrotm[2012], "ONLY");
567 gMC->Gsvolu("QB02","TUBE", idtmed[kAlu], ptube, 3);
570 gMC->Gsvolu("QBA2","TUBE", idtmed[kBe], ptube, 3);
572 gMC->Gspos("QBA2", 1, "QB02", 0., 0., 0, 0, "ONLY");
573 // z = -2.75 -> -2.00
574 gMC->Gspos("QB02", 1, "QBT2", 0., 0.,-2.75+ptube[2], 0, "ONLY");
581 gMC->Gsvolu("QB04","TUBE", idtmed[kAlu], ptube, 3);
582 gMC->Gspos("QB04", 1, "QBT2", 0., 0.,-2.+ptube[2], 0, "ONLY");
589 gMC->Gsvolu("QB06","TUBE", idtmed[kAlu], ptube, 3);
590 gMC->Gspos("QB06", 1, "QBT2", 0., 0., 2.55+ptube[2], 0, "ONLY");
598 gMC->Gsvolu("QBA8","TUBE", idtmed[kInox], ptube, 3);
599 gMC->Gspos("QBA8", 1 ,"QBT2", 0.000, 3.650, -1.25, idrotm[2002], "ONLY");
600 gMC->Gspos("QBA8", 2 ,"QBT2", 3.161, -1.825, -1.25, idrotm[2001], "ONLY");
601 gMC->Gspos("QBA8", 3 ,"QBT2", -3.161, -1.825, -1.25, idrotm[2003], "ONLY");
608 gMC->Gsvolu("QB77","TUBE", idtmed[kC], ptube, 3);
613 gMC->Gsvolu("QBB7","TUBE", idtmed[kInox], ptube, 3);
614 gMC->Gspos("QBB7", 1, "QB77", 0.0, 0.0, 0.55-0.2, 0, "ONLY");
615 gMC->Gspos("QB77", 1, "QBT2", 0.0, 0.0, 2., 0, "ONLY");
618 // Beam pipes between elements
621 gMC->Gsvolu("QB24","TUBE", idtmed[kInox], ptube, 0);
624 ptube[2] = hlenQb24[0];
625 dz = hlenQbbe2 + ptube[2];
626 gMC->Gsposp("QB24", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
628 // Bellow on absorber side
629 dz = dz+hlenQb24[0] + kdzb;
630 gMC->Gspos("QBE0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
632 ptube[2] = hlenQb24[1];
633 dz = dz + kdzb + ptube[2];
634 gMC->Gsposp("QB24", 2 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
645 gMC->Gsvolu("QFA0","TUBE", idtmed[kInox], ptube, 3);
647 gMC->Gspos("QFA0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
653 ptube[2] = hlenQb24[2];
655 gMC->Gsposp("QB24", 3 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
658 // --- Place the PIPE ghost volume (QBPM) in its mother volume (ALIC)
659 // by rotating it to 180 deg. and make it invisible
661 gMC->Gspos("QBPM",1,"ALIC", 0, 0, 0, 0, "ONLY");
662 gMC->Gsbool("QBPM", "L3DX");
663 gMC->Gsbool("QBPM", "L3O3");
664 gMC->Gsbool("QBPM", "L3O4");
668 // ******** Ion Pump volume description starts here ******
675 gMC->Gsvolu("QI32","BOX", idtmed[kInox], pbox, 3);
680 gMC->Gsvolu("QI42","BOX", idtmed[kGetter], pbox, 3);
681 gMC->Gspos("QI42", 1, "QI32", 0.0, 0.0, 0.0, 0, "ONLY");
687 gMC->Gsvolu("QI33","TUBE", idtmed[kInox], ptube, 3);
693 gMC->Gsvolu("QI43","TUBE", idtmed[kAir], ptube, 3);
694 gMC->Gspos("QI43", 1, "QI33", 0.0, 0.0, 0.0, 0, "ONLY");
696 // Connecting tube ->
700 gMC->Gsvolu("QI34","TUBE", idtmed[kInox], ptube, 3);
705 gMC->Gsvolu("QI44","TUBE", idtmed[kAir], ptube, 3);
706 gMC->Gspos("QI44", 1, "QI34", 0.0, 0.0, 0.0, 0, "ONLY");
714 gMC->Gsvolu("QI35","TUBE", idtmed[kInox], ptube, 3);
716 gMC->Gspos("QI32", 1, "QBPM", 0.0, -44.25, zPump, 0, "ONLY");
717 gMC->Gspos("QI33", 1, "QBPM", 0.0, -35.00, zPump,idrotm[2002], "ONLY");
718 gMC->Gspos("QI34", 1, "QBPM", 0.0, -17.90, zPump,idrotm[2002], "ONLY");
719 gMC->Gspos("QI35", 1, "QBPM", 0.0, -24.35, zPump,idrotm[2002], "ONLY");
721 gMC->Gsatt("QBPM", "SEEN", 1);
722 gMC->Gsatt("QBEM", "SEEN", 1);
727 //___________________________________________
728 void AliPIPEv0::CreateMaterials()
731 // Define materials for beam pipe
734 if(fDebug) printf("%s: Create PIPEv0 materials \n",ClassName());
735 Int_t isxfld = gAlice->Field()->Integ();
736 Float_t sxmgmx = gAlice->Field()->Max();
738 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
739 Float_t zsteel[4] = { 26.,24.,28.,14. };
740 Float_t wsteel[4] = { .715,.18,.1,.005 };
742 Float_t aAlBe[2] = { 26.98, 9.01};
743 Float_t zAlBe[2] = { 13.00, 4.00};
744 Float_t wAlBe[2] = { 0.4, 0.6};
748 AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
751 AliMaterial(6, "CARBON$ ", 12.01, 6., 2.265, 18.8, 49.9);
754 AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
757 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
760 AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
763 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
765 // reduced density steel to approximate pump getter material
766 AliMixture(20, "GETTER$", asteel, zsteel, 1.00, 4, wsteel);
769 AliMixture(21, "AlBe$", aAlBe, zAlBe, 2.07, 2, wAlBe);
772 // Defines tracking media parameters.
774 Float_t epsil = .001; // Tracking precision,
775 Float_t stemax = -0.01; // Maximum displacement for multiple scat
776 Float_t tmaxfd = -20.; // Maximum angle due to field deflection
777 Float_t deemax = -.3; // Maximum fractional energy loss, DLS
783 AliMedium(5, "BE", 5, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
786 AliMedium(6, "C", 6, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
789 AliMedium(9, "ALU", 9, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
792 AliMedium(15, "AIR", 15, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
795 AliMedium(16, "VACUUM", 16, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
798 AliMedium(19, "INOX", 19, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
801 AliMedium(20, "GETTER", 20, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
804 AliMedium(21, "AlBe" , 21, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);