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 Revision 1.14 2001/01/20 16:56:33 morsch
19 Put air in connecting tubes and flanges of vacuum pump.
21 Revision 1.13 2001/01/20 16:35:27 morsch
22 Increase mother volume for bellows.
24 Revision 1.12 2000/12/21 16:41:06 morsch
25 Coding convention clean-up (RS3)
27 Revision 1.11 2000/11/28 16:06:57 morsch
28 Undulated beam-pipe replaced by Al-Be (40,60) pipe 1.5 mm thick.
30 Revision 1.10 2000/11/24 13:00:37 morsch
31 - Geometry and materials imported from euclid output
33 - better struturing of volume tree
34 - improved version of flange close to front absorber
35 - more realistic pump materials
36 - undulated beam pipe imported from v3.
38 Revision 1.9 2000/10/02 21:28:15 fca
39 Removal of useless dependecies via forward declarations
41 Revision 1.8 2000/06/11 12:37:01 morsch
42 Coding rule violations corrected
44 Revision 1.7 2000/02/23 16:25:24 fca
45 AliVMC and AliGeant3 classes introduced
46 ReadEuclid moved from AliRun to AliModule
48 Revision 1.6 1999/09/29 09:24:30 fca
49 Introduction of the Copyright and cvs Log
53 ////////////////////////////////////////////////
55 ////////////////////////////////////////////////
57 #include "AliPIPEv0.h"
66 //_____________________________________________________________________________
67 AliPIPEv0::AliPIPEv0()
72 //_____________________________________________________________________________
73 AliPIPEv0::AliPIPEv0(const char *name, const char *title)
80 //___________________________________________
81 void AliPIPEv0::CreateGeometry()
85 <img src="picts/pipe.gif">
92 <img src="picts/tree_pipe.gif">
96 printf("Create PIPEvTemp geometry \n");
99 Int_t *idtmed = fIdtmed->GetArray();
100 Float_t ppcon[48], ptube[3], pbox[3];
103 enum {kC=6, kAlu=9, kInox=19, kGetter=20, kBe=5, kVac=16, kAir=15, kAlBe=21};
106 AliMatrix(idrotm[2001],90.,240., 0., 0., 90.,150.);
107 AliMatrix(idrotm[2002],90., 0., 0., 0., 90.,270.);
108 AliMatrix(idrotm[2003],90.,120., 0., 0., 90., 30.);
109 AliMatrix(idrotm[2004],90.,315., 90., 45., 0., 0.);
110 AliMatrix(idrotm[2005],90.,270., 90., 0., 0., 0.);
111 AliMatrix(idrotm[2006],90.,225., 90.,315., 0., 0.);
112 AliMatrix(idrotm[2007],90.,180., 90.,270., 0., 0.);
113 AliMatrix(idrotm[2008],90.,135., 90.,225., 0., 0.);
114 AliMatrix(idrotm[2009],90., 90., 90.,180., 0., 0.);
115 AliMatrix(idrotm[2010],90., 45., 90.,135., 0., 0.);
117 AliMatrix(idrotm[2012],90.,180., 90., 90.,180., 0.);
118 AliMatrix(idrotm[2013],90., 0., 90., 90.,180., 0.);
122 // The peam pipe up to the Front Absorber
124 // Mother Volume QBPM
125 const Float_t dbe1 = 15.;
126 const Float_t dbe2 = 15.;
143 ppcon[12] = - 28.00-dbe2;
147 ppcon[15] = - 28.00-dbe2;
155 ppcon[21] = 28.+dbe1;
159 ppcon[24] = 28.+dbe1;
191 gMC->Gsvolu("QBPM", "PCON", idtmed[kAir], ppcon, 48);
199 gMC->Gsvolu("QBVA","TUBE", idtmed[kVac], ptube, 3);
200 gMC->Gspos ("QBVA", 1, "QBPM", 0., 0., 355., 0, "ONLY");
202 // volume definitions of various sections
204 // distance between bellows
205 const Float_t dzbb = 8.0;
207 const Float_t dzb = 11.4;
209 //half-lengths of various beam pipe sections
210 Float_t hlenQbbe=43.3;
211 Float_t hlenQbt1=5.5/2.;
212 Float_t hlenQbab=286.6/2.;
213 Float_t hlenQb10=286.6/2.;
214 Float_t hlenQb29=4.4/2.;
215 Float_t hlenQbe0=(2.* dzb + dzbb)/2.;
216 Float_t hlenQb26=20./2.;
217 Float_t hlenQb28=400.6/2.;
219 // Be Pipe in central Alice : length 43.3 * 2
224 gMC->Gsvolu("QBBE","TUBE", idtmed[kBe], ptube, 3);
227 // Metal-Metal Transitions : non-absorber side
229 // Be-Al (or Be to Be-Al alloy)
234 gMC->Gsvolu("QBT1","TUBE", idtmed[kAir], ptube, 3);
241 gMC->Gsvolu("QB01","TUBE", idtmed[kAlu], ptube, 3);
244 gMC->Gsvolu("QBA1","TUBE", idtmed[kBe], ptube, 3);
246 gMC->Gspos("QBA1", 1, "QB01", 0., 0., 0, 0, "ONLY");
247 gMC->Gspos("QB01", 1, "QBT1", 0., 0.,-2.75+ptube[2], 0, "ONLY");
255 gMC->Gsvolu("QB03","TUBE", idtmed[kAlu], ptube, 3);
256 gMC->Gspos("QB03", 1, "QBT1", 0., 0.,-2.+ptube[2], 0, "ONLY");
263 gMC->Gsvolu("QB05","TUBE", idtmed[kAlu], ptube, 3);
264 gMC->Gspos("QB05", 1, "QBT1", 0., 0., 2.55+ptube[2], 0, "ONLY");
272 gMC->Gsvolu("QB08","TUBE", idtmed[kInox], ptube, 3);
273 gMC->Gspos("QB08", 1 ,"QBT1", 0.000, 3.650, -1.25, idrotm[2002], "ONLY");
274 gMC->Gspos("QB08", 2 ,"QBT1", 3.161, -1.825, -1.25, idrotm[2001], "ONLY");
275 gMC->Gspos("QB08", 3 ,"QBT1", -3.161, -1.825, -1.25, idrotm[2003], "ONLY");
282 gMC->Gsvolu("QB07","TUBE", idtmed[kC], ptube, 3);
287 gMC->Gsvolu("QBA7","TUBE", idtmed[kInox], ptube, 3);
288 gMC->Gspos("QBA7", 1, "QB07", 0.0, 0.0, 0.55-0.2, 0, "ONLY");
289 gMC->Gspos("QB07", 1, "QBT1", 0.0, 0.0, 2., 0, "ONLY");
293 // 1st section Alu non-absorber side
298 gMC->Gsvolu("QB10","TUBE", idtmed[kAlu], ptube, 3);
300 // Support rollers: non absorber side
306 gMC->Gsvolu("QBRM","TUBE", idtmed[kAir], ptube, 3);
312 gMC->Gsvolu("QB30","TUBE", idtmed[kInox], ptube, 3);
314 for (i=0; i<8; i++) {
315 Float_t phi = 45.+i*45.*kDegrad;
316 Float_t xpos = 4.*TMath::Sin(phi);
317 Float_t ypos = 4.*TMath::Cos(phi);
318 gMC->Gspos("QB30", i+1, "QBRM", xpos, ypos, 0, idrotm[2004+i], "ONLY");
322 // Flanges: non absorber side
327 gMC->Gsvolu("QB29","TUBE", idtmed[kInox], ptube, 3);
330 // Inox beam pipe: final section on non-absorber side
336 gMC->Gsvolu("QB28","TUBE", idtmed[kInox], ptube, 3);
339 // Undulated beam pipe
346 char cn48[][5]={"QN21","QN22","QN23","QN24","QN25","QN26","QN27","QN28"};
348 Undulation("QUND",pitch,thick,zundul,rundul,cn48);
349 gMC->Gspos("QUND", 1, "QBPM", 0., 0., 335.+zundul, 0, "ONLY");
352 // Al-Be (40-60 wgt%, rho=2.7 g/cm**3) beam pipe
358 gMC->Gsvolu("QBAB","TUBE", idtmed[kAlBe], ptube, 3);
362 // last piece : inox pipe from pump till end
368 //gMC->Gsvolu("QB48","TUBE", idtmed[kInox], ptube, 3);
375 gMC->Gsvolu("QB27","TUBE", idtmed[kInox], ptube, 3);
376 gMC->Gspos("QB27", 1, "QBPM", 0.0, 0.0, 208.1, 0, "ONLY");
379 // Aluminium collar for support rollers
381 gMC->Gsvolu("QB25","TUBE", idtmed[kAlu], ptube, 0);
384 // 2.5 mm thick SS tube for hanging pump
389 gMC->Gsvolu("QB26","TUBE", idtmed[kInox], ptube, 3);
397 ptube[2] = (2.*dzb+dzbb)/2.;
398 gMC->Gsvolu("QBE0","TUBE", idtmed[kAir], ptube, 3);
402 gMC->Gsvolu("QBEM","TUBE", idtmed[kAir], ptube, 3);
403 Float_t dz = (dzb+dzbb)/2.;
404 gMC->Gspos("QBEM", 2 ,"QBE0", 0.0, 0.0, -dz, 0 , "ONLY");
405 gMC->Gspos("QBEM", 1 ,"QBE0", 0.0, 0.0, dz, idrotm[2012], "ONLY");
411 gMC->Gsvolu("QB19","TUBE", idtmed[kVac], ptube, 3);
412 gMC->Gspos("QB19", 1 ,"QBEM", 0.0, 0.0, 0.5, 0 , "ONLY");
418 gMC->Gsvolu("QB18","TUBE", idtmed[kVac], ptube, 3);
419 for (i=0; i<15; i++) {
420 gMC->Gspos("QB18", i+1, "QBEM", 0.0, 0.0, 3.3-i*0.4, 0, "ONLY");
427 gMC->Gsvolu("QB21","TUBE", idtmed[kVac], ptube, 3);
428 gMC->Gspos("QB21", 1 ,"QBEM", 0.0, 0.0, -4.5, 0 , "ONLY");
434 gMC->Gsvolu("QB15","TUBE", idtmed[kInox], ptube, 3);
435 for (i=0; i<30; i++) {
436 gMC->Gspos("QB15", i+1, "QBEM", 0.0, 0.0, 3.4-i*0.2, 0, "ONLY");
443 gMC->Gsvolu("QB16","TUBE", idtmed[kInox], ptube, 3);
444 for (i=0; i<15; i++) {
445 gMC->Gspos("QB16", i+1, "QBEM", 0.0, 0.0, 3.3-i*0.4, 0, "ONLY");
452 gMC->Gsvolu("QB17","TUBE", idtmed[kInox], ptube, 3);
453 for (i=0; i<14; i++) {
454 gMC->Gspos("QB17", i+1, "QBEM", 0.0, 0.0, 3.1-i*0.4, 0, "ONLY");
461 gMC->Gsvolu("QB14","TUBE", idtmed[kInox], ptube, 3);
462 gMC->Gspos("QB14", 2 ,"QBEM", 0.0, 0.0, -2.8025, 0 , "ONLY");
463 gMC->Gspos("QB14", 1 ,"QBEM", 0.0, 0.0, 3.8025, 0 , "ONLY");
469 gMC->Gsvolu("QB13","TUBE", idtmed[kInox], ptube, 3);
470 gMC->Gspos("QB13", 2 ,"QBEM", 0.0, 0.0, -3.25, 0 , "ONLY");
471 gMC->Gspos("QB13", 1 ,"QBEM", 0.0, 0.0, 4.25, 0 , "ONLY");
477 gMC->Gsvolu("QB12","TUBE", idtmed[kInox], ptube, 3);
478 gMC->Gspos("QB12", 1 ,"QBEM", 0.0, 0.0, 5.0, 0, "ONLY");
482 // pipe between Bellows
486 gMC->Gsvolu("QB23","TUBE", idtmed[kInox], ptube, 3);
487 gMC->Gspos("QB23", 1 ,"QBE0", 0.0, 0.0, 0.0, 0, "ONLY");
492 // **** placement of various sections on non-absorber side ****
494 // first the beryllium section : 43.3 cm long on both sides of IP
495 // zstart=0, zend=43.3, length=43.3 on one side
497 gMC->Gspos("QBBE", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
499 // next meta-metal transition QBT1 on on-absorber side
500 // zstart=43.3, zend=48.8, length=5.5
501 zpos = zpos + hlenQbbe + hlenQbt1;
502 gMC->Gspos("QBT1", 1, "QBPM", 0., 0., zpos, 0, "ONLY");
504 // Aluminium OR Al-be alloy section
505 //zpos=zpos + hlenQbt1 + hlenQb10;
506 //gMC->Gspos("QB10", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
507 // zstart= 48.8, zend=335.4, length=286.6
508 zpos = zpos + hlenQbt1 + hlenQbab;
509 gMC->Gspos("QBAB", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
511 // inox flange at the start of bellow
512 // zstart=335.4, zend=339.8, length=4.4
513 zpos = zpos + hlenQbab + hlenQb29;
514 gMC->Gspos("QB29", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
517 // zstart=339.8, zend=370.6, length=30.9
518 zpos = zpos + hlenQb29 + hlenQbe0;
519 gMC->Gspos("QBE0", 2 ,"QBPM", 0.0, 0.0, zpos, 0, "ONLY");
521 // inox flange at the end of bellow and start of thick inox for pump
522 // zstart=370.6, zend=375.0, length=4.4
523 zpos = zpos + hlenQbe0 + hlenQb29;
524 gMC->Gspos("QB29", 2, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
526 // 2.5mm thick inox section to hang the pump
527 // zstart=375.0, zend=395.0, length=20.0
528 zpos = zpos + hlenQb29 + hlenQb26;
529 gMC->Gspos("QB26", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
531 //inox flange at the end of pump section to join to next pipe
532 // zstart=395.0, zend=399.4, length=4.4
533 zpos = zpos + hlenQb26 + hlenQb29;
534 gMC->Gspos("QB29", 3, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
536 //last inox section till 800 cm
537 // zstart=399.4, zend=800., length=400.6
538 zpos = zpos + hlenQb29 + hlenQb28;
539 gMC->Gspos("QB28", 1, "QBPM", 0.0, 0.0, zpos, 0, "ONLY");
542 // aluminium collars and support rollers at two places
548 gMC->Gsposp("QB25", 1, "QBPM", 0., 0., 654.8, 0, "ONLY", ptube, 3);
549 gMC->Gspos("QBRM", 1, "QBPM", 0., 0., 654.8, 0, "ONLY");
553 gMC->Gsposp("QB25", 2, "QBPM", 0., 0., 254.8, 0, "ONLY", ptube, 3);
554 gMC->Gspos("QBRM", 2, "QBPM", 0., 0., 254.8, 0, "ONLY");
558 //******** end of placement on no-absorber side *********
561 // **** Absorber side *****
564 // metal-metal transition : Be-Alu on absorber side
569 gMC->Gsvolu("QBT2","TUBE", idtmed[kAir], ptube, 3);
571 gMC->Gspos("QBT2", 1, "QBPM", 0., 0., -hlenQbbe-ptube[2], idrotm[2012], "ONLY");
578 gMC->Gsvolu("QB02","TUBE", idtmed[kAlu], ptube, 3);
581 gMC->Gsvolu("QBA2","TUBE", idtmed[kBe], ptube, 3);
583 gMC->Gspos("QBA2", 1, "QB02", 0., 0., 0, 0, "ONLY");
584 // z = -2.75 -> -2.00
585 gMC->Gspos("QB02", 1, "QBT2", 0., 0.,-2.75+ptube[2], 0, "ONLY");
592 gMC->Gsvolu("QB04","TUBE", idtmed[kAlu], ptube, 3);
593 gMC->Gspos("QB04", 1, "QBT2", 0., 0.,-2.+ptube[2], 0, "ONLY");
600 gMC->Gsvolu("QB06","TUBE", idtmed[kAlu], ptube, 3);
601 gMC->Gspos("QB06", 1, "QBT2", 0., 0., 2.55+ptube[2], 0, "ONLY");
609 gMC->Gsvolu("QBA8","TUBE", idtmed[kInox], ptube, 3);
610 gMC->Gspos("QBA8", 1 ,"QBT2", 0.000, 3.650, -1.25, idrotm[2002], "ONLY");
611 gMC->Gspos("QBA8", 2 ,"QBT2", 3.161, -1.825, -1.25, idrotm[2001], "ONLY");
612 gMC->Gspos("QBA8", 3 ,"QBT2", -3.161, -1.825, -1.25, idrotm[2003], "ONLY");
619 gMC->Gsvolu("QB77","TUBE", idtmed[kC], ptube, 3);
624 gMC->Gsvolu("QBB7","TUBE", idtmed[kInox], ptube, 3);
625 gMC->Gspos("QBB7", 1, "QB77", 0.0, 0.0, 0.55-0.2, 0, "ONLY");
626 gMC->Gspos("QB77", 1, "QBT2", 0.0, 0.0, 2., 0, "ONLY");
629 // beam pipe between metal-metal transition and bellows
632 ptube[2] = (81.7-(2.*dzb+dzbb)-(hlenQbbe+5.5))/2.;
635 gMC->Gsvolu("QB24","TUBE", idtmed[kInox], ptube, 3);
637 dz = (hlenQbbe+5.5)+ptube[2];
638 gMC->Gspos("QB24", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
640 // beam pipe between flange and bellows
645 gMC->Gsvolu("QB22","TUBE", idtmed[kInox], ptube, 3);
646 gMC->Gspos("QB22", 1 ,"QBPM", 0.0, 0.0, -82.15, 0, "ONLY");
656 gMC->Gsvolu("QFA0","TUBE", idtmed[kAlu], ptube, 3);
657 gMC->Gspos("QFA0", 1 ,"QBPM", 0.0, 0.0, -84.0, 0, "ONLY");
663 gMC->Gsvolu("QFA1","TUBE", idtmed[kInox], ptube, 3);
664 gMC->Gspos("QFA1", 1 ,"QFA0", 0.0, 0.0, 0.225, 0, "ONLY");
670 gMC->Gsvolu("QFA2","TUBE", idtmed[kInox], ptube, 3);
671 for (i=0; i<8; i++) {
672 Float_t phi = i*45.*kDegrad;
673 Float_t xpos = 3.9*TMath::Sin(phi);
674 Float_t ypos = 3.9*TMath::Cos(phi);
675 gMC->Gspos("QFA2", i+1, "QFA0", xpos, ypos, 0., 0, "ONLY");
683 gMC->Gsvolu("QB32","TUBE", idtmed[kInox], ptube, 3);
684 gMC->Gspos("QB32", 1 ,"QBPM", 0.0, 0.0, -90.+2.3, 0, "ONLY");
686 //bellow on absorber side
687 ptube[2] = (2.*dzb+dzbb)/2.;
688 dz = (81.7-ptube[2]);
689 gMC->Gspos("QBE0", 1 ,"QBPM", 0.0, 0.0, -dz, 0, "ONLY");
692 // --- Place the PIPE ghost volume (QBPM) in its mother volume (ALIC)
693 // by rotating it to 180 deg. and make it invisible
697 gMC->Gspos("QBPM",1,"ALIC",0,0,0,idrotm[2013], "ONLY");
701 // ******** Ion Pump volume description starts here ******
708 gMC->Gsvolu("QI32","BOX", idtmed[kInox], pbox, 3);
713 gMC->Gsvolu("QI42","BOX", idtmed[kGetter], pbox, 3);
714 gMC->Gspos("QI42", 1, "QI32", 0.0, 0.0, 0.0, 0, "ONLY");
720 gMC->Gsvolu("QI33","TUBE", idtmed[kInox], ptube, 3);
726 gMC->Gsvolu("QI43","TUBE", idtmed[kAir], ptube, 3);
727 gMC->Gspos("QI43", 1, "QI33", 0.0, 0.0, 0.0, 0, "ONLY");
729 // Connecting tube ->
734 gMC->Gsvolu("QI34","TUBE", idtmed[kInox], ptube, 3);
739 gMC->Gsvolu("QI44","TUBE", idtmed[kAir], ptube, 3);
740 gMC->Gspos("QI44", 1, "QI34", 0.0, 0.0, 0.0, 0, "ONLY");
748 gMC->Gsvolu("QI35","TUBE", idtmed[kInox], ptube, 3);
750 Float_t zPump = 385.;
752 gMC->Gspos("QI32", 1, "QBPM", 0.0, -44.25, zPump, 0, "ONLY");
753 gMC->Gspos("QI33", 1, "QBPM", 0.0, -35.00, zPump,idrotm[2002], "ONLY");
754 gMC->Gspos("QI34", 1, "QBPM", 0.0, -17.90, zPump,idrotm[2002], "ONLY");
755 gMC->Gspos("QI35", 1, "QBPM", 0.0, -24.35, zPump,idrotm[2002], "ONLY");
757 gMC->Gsatt("QBPM", "SEEN", 0);
758 gMC->Gsatt("QBEM", "SEEN", 0);
763 //___________________________________________
764 void AliPIPEv0::CreateMaterials()
767 // Define materials for beam pipe
770 printf("Create PIPEvTemp materials \n");
771 Int_t isxfld = gAlice->Field()->Integ();
772 Float_t sxmgmx = gAlice->Field()->Max();
774 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
775 Float_t zsteel[4] = { 26.,24.,28.,14. };
776 Float_t wsteel[4] = { .715,.18,.1,.005 };
778 Float_t aAlBe[2] = { 26.98, 9.01};
779 Float_t zAlBe[2] = { 13.00, 4.00};
780 Float_t wAlBe[2] = { 0.4, 0.6};
784 AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
787 AliMaterial(6, "CARBON$ ", 12.01, 6., 2.265, 18.8, 49.9);
790 AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
793 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
796 AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
799 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
801 // reduced density steel to approximate pump getter material
802 AliMixture(20, "GETTER$", asteel, zsteel, 1.00, 4, wsteel);
805 AliMixture(21, "AlBe$", aAlBe, zAlBe, 2.07, 2, wAlBe);
808 // Defines tracking media parameters.
810 Float_t epsil = .001; // Tracking precision,
811 Float_t stemax = -0.01; // Maximum displacement for multiple scat
812 Float_t tmaxfd = -20.; // Maximum angle due to field deflection
813 Float_t deemax = -.3; // Maximum fractional energy loss, DLS
819 AliMedium(5, "BE", 5, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
822 AliMedium(6, "C", 6, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
825 AliMedium(9, "ALU", 9, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
828 AliMedium(15, "AIR", 15, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
831 AliMedium(16, "VACUUM", 16, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
834 AliMedium(19, "INOX", 19, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
837 AliMedium(20, "GETTER", 20, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
840 AliMedium(21, "AlBe" , 21, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);