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 "AliPIPEv0.h"
30 #include <Riostream.h>
34 //_____________________________________________________________________________
35 AliPIPEv0::AliPIPEv0()
41 //_____________________________________________________________________________
42 AliPIPEv0::AliPIPEv0(const char *name, const char *title)
50 //___________________________________________
51 void AliPIPEv0::CreateGeometry()
55 <img src="picts/pipe.gif">
62 <img src="picts/tree_pipe.gif">
66 if(fDebug) printf("%s: Create PIPEv0 geometry \n",ClassName());
69 Int_t *idtmed = fIdtmed->GetArray();
70 Float_t ppcon[90], ptube[3], pbox[3];
75 AliMatrix(idrotm[2001],90.,240., 0., 0., 90.,150.);
76 AliMatrix(idrotm[2002],90., 0., 0., 0., 90.,270.);
77 AliMatrix(idrotm[2003],90.,120., 0., 0., 90., 30.);
78 AliMatrix(idrotm[2004],90.,315., 90., 45., 0., 0.);
79 AliMatrix(idrotm[2005],90.,270., 90., 0., 0., 0.);
80 AliMatrix(idrotm[2006],90.,225., 90.,315., 0., 0.);
81 AliMatrix(idrotm[2007],90.,180., 90.,270., 0., 0.);
82 AliMatrix(idrotm[2008],90.,135., 90.,225., 0., 0.);
83 AliMatrix(idrotm[2009],90., 90., 90.,180., 0., 0.);
84 AliMatrix(idrotm[2010],90., 45., 90.,135., 0., 0.);
86 AliMatrix(idrotm[2012],90.,180., 90., 90.,180., 0.);
87 AliMatrix(idrotm[2013],90., 0., 90., 90.,180., 0.);
91 // distance between bellows
92 const Float_t kdzbb = 9.0;
93 // total size of bellow section
94 const Float_t kdzb = 15.0;
95 // size of undulated region
96 const Float_t kdzub = 2.0;
98 // half-lengths of various beam pipe sections
100 Float_t hlenQbbe1 = 40.;
101 Float_t hlenQbbe2 = 36.5;
102 Float_t hlenQbbe = (hlenQbbe1+hlenQbbe2)/2.;
105 // Float_t hlenQbt1 = 5.5/2.;
107 // Pipe outside central region (non-absober side)
108 Float_t hlenQbab = 157.5;
110 // Flange non-absorber side
111 Float_t hlenQb29 = 11.5/2.+1.75 + 5.0;
114 Float_t hlenQbe0 = kdzb;
116 // Inox pipe between Be and Bellow (absorber side)
117 Float_t hlenQb24[3] = {10.5/2., 1.8, 3.3};
120 Float_t hlenQb28 = (800.-hlenQbbe1-2.*hlenQbab-4.*hlenQb29-2.*hlenQbe0)/2.;
122 // Position of the pump
123 Float_t zPump = hlenQbbe1+2.*hlenQbab+2.*hlenQb29+kdzb;
125 // Inner beam pipe radius
126 const Float_t kRinBe = 2.9;
127 const Float_t kRinSt = 2.92;
130 const Float_t kRoutBe = 2.98;
131 const Float_t kRoutSt = 3.00;
138 // The peam pipe up to the Front Absorber
140 // Mother Volume QBPM
157 ppcon[12] = -90+2.*hlenQb24[2]+2.8+2.*hlenQb24[1];
161 ppcon[15] = ppcon[12];
165 ppcon[18] = ppcon[15] + 2. + 2.*kdzub+0.2;
169 ppcon[21] = ppcon[18];
173 ppcon[24] = ppcon[21] + 2.* kdzbb-0.4;
177 ppcon[27] = ppcon[24];
197 ppcon[42] = hlenQbbe1+2.*hlenQbab-0.1;
201 ppcon[45] = ppcon[42];
205 ppcon[48] = ppcon[45]+2.*hlenQb29-5.;
209 ppcon[51] = ppcon[48];
213 ppcon[54] = ppcon[51]+2.*kdzb+10.;
217 ppcon[57] = ppcon[54];
225 gMC->Gsvolu("QBPM", "PCON", idtmed[kAir], ppcon,63);
229 // volume definitions of various sections
234 gMC->Gsvolu("QBVA","TUBE", idtmed[kVac], ptube, 0);
237 ptube[2] = (90.-hlenQbbe2)/2.;
238 dz = -90. + ptube[2];
239 gMC->Gsposp ("QBVA", 1, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
243 ptube[2] = hlenQbbe+hlenQbab;
245 gMC->Gsposp ("QBVA", 2, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
249 ptube[2] = (800.-hlenQbbe1-2.*hlenQbab)/2.;
251 gMC->Gsposp ("QBVA", 3, "QBPM", 0., 0., dz , 0, "ONLY", ptube, 3);
254 // Be Pipe in central Alice
259 gMC->Gsvolu("QBBE","TUBE", idtmed[kBe], ptube, 3);
294 gMC->Gsvolu("QBSR", "PCON", idtmed[kC], ppcon,21);
295 gMC->Gspos("QBSR", 1, "QBPM", 0.0, 0.0, 40., 0, "ONLY");
296 gMC->Gspos("QBSR", 2, "QBPM", 0.0, 0.0, 150., 0, "ONLY");
297 gMC->Gspos("QBSR", 3, "QBPM", 0.0, 0.0, 260., 0, "ONLY");
298 gMC->Gspos("QBSR", 4, "QBPM", 0.0, 0.0,- 46., 0, "ONLY");
300 // Flange and Fixed Point: non absorber side
309 ppcon[3] = -hlenQb29;
313 ppcon[6] = ppcon[3]+3.6;
321 ppcon[12] = hlenQb29;
325 gMC->Gsvolu("QB29", "PCON", idtmed[kAir], ppcon,15);
332 gMC->Gsvolu("QF29","TUBE", idtmed[kInox], ptube, 3);
333 gMC->Gspos("QF29", 1, "QB29", 0.0, 0.0, -hlenQb29+1.75, 0, "ONLY");
338 gMC->Gsvolu("QS29","TUBE", idtmed[kInox], ptube, 3);
339 gMC->Gspos("QS29", 1, "QB29", 0.0, 0.0, 0., 0, "ONLY");
344 gMC->Gsvolu("QP29","TUBE", idtmed[kInox], ptube, 3);
345 gMC->Gspos("QP29", 1, "QB29", 0.0, 0.0, -hlenQb29+9.75+3., 0, "ONLY");
349 // Inox beam pipe: final section on non-absorber side
355 gMC->Gsvolu("QB28","TUBE", idtmed[kInox], ptube, 3);
358 // Al-Be (40-60 wgt%, rho=2.7 g/cm**3) beam pipe
360 // This section is under study (A.M. 1/2/2002)
364 if (fPipeMaterial == kAlu) {
366 } else if (fPipeMaterial == kBe) {
368 } else if (fPipeMaterial == kInox){
373 gMC->Gsvolu("QBAB","TUBE", idtmed[fPipeMaterial], ptube, 3);
375 // 2.5 mm thick SS tube for hanging pump
381 gMC->Gsvolu("QB26","TUBE", idtmed[kInox], ptube, 3);
388 Float_t pconQBE0[33];
394 pconQBE0[ 4]= kRinSt;
395 pconQBE0[ 5]= kRoutSt;
397 pconQBE0[ 6]= -kdzb+2.;
398 pconQBE0[ 7]= kRinSt;
399 pconQBE0[ 8]= kRoutSt;
401 pconQBE0[ 9]= -kdzb+2.;
402 pconQBE0[10]= kRinSt;
405 pconQBE0[12]= -kdzb+2.+2.*kdzub;
406 pconQBE0[13]= kRinSt;
409 pconQBE0[15]= -kdzb+2.+2.*kdzub;
410 pconQBE0[16]= kRinSt;
411 pconQBE0[17]= kRoutSt;
413 pconQBE0[18]= -kdzb+2.+2.*kdzub+2.*kdzbb;
414 pconQBE0[19]= kRinSt;
415 pconQBE0[20]= kRoutSt;
417 pconQBE0[21]= -kdzb+2.+2.*kdzub+2.*kdzbb;
418 pconQBE0[22]= kRinSt;
421 pconQBE0[24]= -kdzb+2.+4.*kdzub+2.*kdzbb;
422 pconQBE0[25]= kRinSt;
425 pconQBE0[27]= -kdzb+2.+4.*kdzub+2.*kdzbb;
426 pconQBE0[28]= kRinSt;
427 pconQBE0[29]= kRoutSt;
430 pconQBE0[31]= kRinSt;
431 pconQBE0[32]= kRoutSt;
432 gMC->Gsvolu("QBE0", "PCON", idtmed[kAir], pconQBE0, 33);
434 // Undulated piece mother
438 gMC->Gsvolu("QBEM","TUBE", idtmed[kAir], ptube, 3);
440 gMC->Gspos("QBEM", 2 ,"QBE0", 0.0, 0.0, dz, 0 , "ONLY");
441 gMC->Gspos("QBEM", 1 ,"QBE0", 0.0, 0.0, -dz, idrotm[2012], "ONLY");
445 Float_t ur = 2.*kdzub-12.*uw;
455 pund[ 5] = kRinSt+uw;
465 pund[12] = pund[9]+uw;
473 pund[18] = pund[12]+uz;
481 pund[24] = pund[21]+uw;
485 gMC->Gsvolu("QBEU", "PCON", idtmed[kInox], pund, 27);
487 for (i = 0; i < 6; i++)
489 dz = -kdzub+(1+2*i)*ut;
490 gMC->Gspos("QBEU", i+1 ,"QBEM", 0.0, 0.0, dz, 0 , "ONLY");
493 ptube[1] = kRinSt+uw;
495 gMC->Gsvolu("QBEW","TUBE", idtmed[kInox], ptube, 3);
496 gMC->Gspos("QBEW", 1 ,"QBEM", 0.0, 0.0, kdzub-uz, 0 , "ONLY");
499 gMC->Gsvolu("QBEP","TUBE", idtmed[kInox], ptube, 0);
503 gMC->Gsposp("QBEP", 1 ,"QBE0", 0.0, 0.0, -kdzb+1., 0 , "ONLY", ptube, 3);
504 gMC->Gsposp("QBEP", 2 ,"QBE0", 0.0, 0.0, kdzb-1., 0 , "ONLY", ptube, 3);
506 gMC->Gsposp("QBEP", 3 ,"QBE0", 0.0, 0.0, 0., 0 , "ONLY", ptube, 3);
508 // End undulated part
513 // **** Placement of various sections on non-absorber side ****
516 // first the beryllium section
517 Float_t zpos = -(hlenQbbe2-hlenQbbe1)/2;
518 gMC->Gspos("QBBE", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
520 // next meta-metal transition QBT1 on on-absorber side
521 // zpos = zpos + hlenQbbe + hlenQbt1;
522 // gMC->Gspos("QBT1", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
524 // Aluminium OR Al-be alloy section
525 zpos = hlenQbbe1+hlenQbab;
526 gMC->Gspos("QBAB", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
528 // inox flange at the start of bellow
529 zpos = zpos + hlenQbab + hlenQb29;
530 gMC->Gspos("QB29", 1, "QBPM", 0.0, 0.0, zpos, idrotm[2012], "ONLY");
533 zpos = zpos + hlenQb29 + hlenQbe0;
534 gMC->Gspos("QBE0", 2 ,"QBPM", 0.0, 0.0, zpos, 0, "ONLY");
536 // inox flange at the end of bellow and start of thick inox for pump
537 zpos = zpos + hlenQbe0 + hlenQb29;
538 gMC->Gspos("QB29", 2, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
540 //last inox section till 800 cm
541 zpos = zpos + hlenQb29 + hlenQb28;
542 gMC->Gspos("QB28", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
544 //******** end of placement on no-absorber side *********
547 // **** Absorber side *****
551 // metal-metal transition : Be-Alu on absorber side
556 gMC->Gsvolu("QBT2","TUBE", idtmed[kAir], ptube, 3);
558 gMC->Gspos("QBT2", 1, "QBPM", 0., 0., -hlenQbbe-ptube[2], idrotm[2012], "ONLY");
565 gMC->Gsvolu("QB02","TUBE", idtmed[kAlu], ptube, 3);
568 gMC->Gsvolu("QBA2","TUBE", idtmed[kBe], ptube, 3);
570 gMC->Gspos("QBA2", 1, "QB02", 0., 0., 0, 0, "ONLY");
571 // z = -2.75 -> -2.00
572 gMC->Gspos("QB02", 1, "QBT2", 0., 0.,-2.75+ptube[2], 0, "ONLY");
579 gMC->Gsvolu("QB04","TUBE", idtmed[kAlu], ptube, 3);
580 gMC->Gspos("QB04", 1, "QBT2", 0., 0.,-2.+ptube[2], 0, "ONLY");
587 gMC->Gsvolu("QB06","TUBE", idtmed[kAlu], ptube, 3);
588 gMC->Gspos("QB06", 1, "QBT2", 0., 0., 2.55+ptube[2], 0, "ONLY");
596 gMC->Gsvolu("QBA8","TUBE", idtmed[kInox], ptube, 3);
597 gMC->Gspos("QBA8", 1 ,"QBT2", 0.000, 3.650, -1.25, idrotm[2002], "ONLY");
598 gMC->Gspos("QBA8", 2 ,"QBT2", 3.161, -1.825, -1.25, idrotm[2001], "ONLY");
599 gMC->Gspos("QBA8", 3 ,"QBT2", -3.161, -1.825, -1.25, idrotm[2003], "ONLY");
606 gMC->Gsvolu("QB77","TUBE", idtmed[kC], ptube, 3);
611 gMC->Gsvolu("QBB7","TUBE", idtmed[kInox], ptube, 3);
612 gMC->Gspos("QBB7", 1, "QB77", 0.0, 0.0, 0.55-0.2, 0, "ONLY");
613 gMC->Gspos("QB77", 1, "QBT2", 0.0, 0.0, 2., 0, "ONLY");
616 // Beam pipes between elements
619 gMC->Gsvolu("QB24","TUBE", idtmed[kInox], ptube, 0);
622 ptube[2] = hlenQb24[0];
623 dz = hlenQbbe2 + ptube[2];
624 gMC->Gsposp("QB24", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
626 // Bellow on absorber side
627 dz = dz+hlenQb24[0] + kdzb;
628 gMC->Gspos("QBE0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
630 ptube[2] = hlenQb24[1];
631 dz = dz + kdzb + ptube[2];
632 gMC->Gsposp("QB24", 2 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
643 gMC->Gsvolu("QFA0","TUBE", idtmed[kInox], ptube, 3);
645 gMC->Gspos("QFA0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
651 ptube[2] = hlenQb24[2];
653 gMC->Gsposp("QB24", 3 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY", ptube, 3);
656 // --- Place the PIPE ghost volume (QBPM) in its mother volume (ALIC)
657 // by rotating it to 180 deg. and make it invisible
659 gMC->Gspos("QBPM",1,"ALIC",0,0,0,idrotm[2013], "ONLY");
660 gMC->Gsbool("QBPM", "L3DX");
661 gMC->Gsbool("QBPM", "L3O3");
662 gMC->Gsbool("QBPM", "L3O4");
666 // ******** Ion Pump volume description starts here ******
673 gMC->Gsvolu("QI32","BOX", idtmed[kInox], pbox, 3);
678 gMC->Gsvolu("QI42","BOX", idtmed[kGetter], pbox, 3);
679 gMC->Gspos("QI42", 1, "QI32", 0.0, 0.0, 0.0, 0, "ONLY");
685 gMC->Gsvolu("QI33","TUBE", idtmed[kInox], ptube, 3);
691 gMC->Gsvolu("QI43","TUBE", idtmed[kAir], ptube, 3);
692 gMC->Gspos("QI43", 1, "QI33", 0.0, 0.0, 0.0, 0, "ONLY");
694 // Connecting tube ->
698 gMC->Gsvolu("QI34","TUBE", idtmed[kInox], ptube, 3);
703 gMC->Gsvolu("QI44","TUBE", idtmed[kAir], ptube, 3);
704 gMC->Gspos("QI44", 1, "QI34", 0.0, 0.0, 0.0, 0, "ONLY");
712 gMC->Gsvolu("QI35","TUBE", idtmed[kInox], ptube, 3);
714 gMC->Gspos("QI32", 1, "QBPM", 0.0, -44.25, zPump, 0, "ONLY");
715 gMC->Gspos("QI33", 1, "QBPM", 0.0, -35.00, zPump,idrotm[2002], "ONLY");
716 gMC->Gspos("QI34", 1, "QBPM", 0.0, -17.90, zPump,idrotm[2002], "ONLY");
717 gMC->Gspos("QI35", 1, "QBPM", 0.0, -24.35, zPump,idrotm[2002], "ONLY");
719 gMC->Gsatt("QBPM", "SEEN", 1);
720 gMC->Gsatt("QBEM", "SEEN", 1);
725 //___________________________________________
726 void AliPIPEv0::CreateMaterials()
729 // Define materials for beam pipe
732 if(fDebug) printf("%s: Create PIPEv0 materials \n",ClassName());
733 Int_t isxfld = gAlice->Field()->Integ();
734 Float_t sxmgmx = gAlice->Field()->Max();
736 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
737 Float_t zsteel[4] = { 26.,24.,28.,14. };
738 Float_t wsteel[4] = { .715,.18,.1,.005 };
740 Float_t aAlBe[2] = { 26.98, 9.01};
741 Float_t zAlBe[2] = { 13.00, 4.00};
742 Float_t wAlBe[2] = { 0.4, 0.6};
746 AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
749 AliMaterial(6, "CARBON$ ", 12.01, 6., 2.265, 18.8, 49.9);
752 AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
755 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
758 AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
761 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
763 // reduced density steel to approximate pump getter material
764 AliMixture(20, "GETTER$", asteel, zsteel, 1.00, 4, wsteel);
767 AliMixture(21, "AlBe$", aAlBe, zAlBe, 2.07, 2, wAlBe);
770 // Defines tracking media parameters.
772 Float_t epsil = .001; // Tracking precision,
773 Float_t stemax = -0.01; // Maximum displacement for multiple scat
774 Float_t tmaxfd = -20.; // Maximum angle due to field deflection
775 Float_t deemax = -.3; // Maximum fractional energy loss, DLS
781 AliMedium(5, "BE", 5, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
784 AliMedium(6, "C", 6, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
787 AliMedium(9, "ALU", 9, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
790 AliMedium(15, "AIR", 15, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
793 AliMedium(16, "VACUUM", 16, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
796 AliMedium(19, "INOX", 19, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
799 AliMedium(20, "GETTER", 20, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
802 AliMedium(21, "AlBe" , 21, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);