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 **************************************************************************/
19 ///////////////////////////////////////////////////////////////////////////////
21 // Photon Multiplicity Detector Version 1 //
25 <img src="picts/AliPMDv0Class.gif">
29 ///////////////////////////////////////////////////////////////////////////////
32 #include "Riostream.h"
34 #include <TVirtualMC.h>
42 static Int_t kdet, ncell_sm, ncell_hole;
43 static Float_t zdist, zdist1;
44 static Float_t sm_length, sm_thick, cell_radius, cell_wall, cell_depth;
45 static Float_t boundary, th_base, th_air, th_pcb;
46 static Float_t th_lead, th_steel;
50 //_____________________________________________________________________________
54 // Default constructor
59 //_____________________________________________________________________________
60 AliPMDv0::AliPMDv0(const char *name, const char *title)
64 // Standard constructor
69 //_____________________________________________________________________________
70 void AliPMDv0::CreateGeometry()
73 // Create geometry for Photon Multiplicity Detector Version 3 :
78 <img src="picts/AliPMDv0.gif">
83 <img src="picts/AliPMDv0Tree.gif">
91 //_____________________________________________________________________________
92 void AliPMDv0::CreateSupermodule()
95 // Creates the geometry of the cells, places them in supermodule which
96 // is a rhombus object.
98 // *** DEFINITION OF THE GEOMETRY OF THE PMD ***
99 // *** HEXAGONAL CELLS WITH CELL RADIUS 0.25 cm (see "GetParameters")
100 // -- Author : S. Chattopadhyay, 02/04/1999.
102 // Basic unit is ECAR, a hexagonal cell made of Ar+CO2, which is placed inside another
103 // hexagonal cell made of Cu (ECCU) with larger radius, compared to ECAR. The difference
104 // in radius gives the dimension of half width of each cell wall.
105 // These cells are placed as 72 x 72 array in a
106 // rhombus shaped supermodule (EHC1). The rhombus shaped modules are designed
107 // to have closed packed structure.
109 // Each supermodule (ESMA, ESMB), made of G10 is filled with following components
110 // EAIR --> Air gap between gas hexagonal cells and G10 backing.
111 // EHC1 --> Rhombus shaped parallelopiped containing the hexagonal cells
112 // EAIR --> Air gap between gas hexagonal cells and G10 backing.
114 // ESMA, ESMB are placed in EMM1 along with EMPB (Pb converter)
115 // and EMFE (iron support)
118 // ESMB --> Normal supermodule, mirror image of ESMA
119 // EMPB --> Pb converter
120 // EMFE --> Fe backing
121 // ESMA --> Normal supermodule
123 // ESMX, ESMY are placed in EMM2 along with EMPB (Pb converter)
124 // and EMFE (iron support)
127 // ESMY --> Special supermodule, mirror image of ESMX,
128 // EMPB --> Pb converter
129 // EMFE --> Fe backing
130 // ESMX --> First of the two Special supermodules near the hole
133 // ESMQ --> Special supermodule, mirror image of ESMX,
134 // EMPB --> Pb converter
135 // EMFE --> Fe backing
136 // ESMP --> Second of the two Special supermodules near the hole
138 // EMM2 and EMM3 are used to create the hexagonal HOLE
144 // ---------------------------------------------------------------------------
146 // EHOL EMM1 EMM2 EMM3 EALM
148 // -------------------- -------------------- --------------------
149 // | | | | | | | | | | | |
150 // ESMB EMPB EMFE ESMA ESMY EMPB EMFE ESMX ESMQ EMPB EMFE ESMP
152 // ------------ ------------ -------------
154 // EAIR EHC1 EAIR EAIR EHC2 EAIR EAIR EHC3 EAIR
165 const Float_t root3_2 = TMath::Sqrt(3.) /2.;
166 Int_t *idtmed = fIdtmed->GetArray()-599;
168 AliMatrix(ihrotm, 90., 30., 90., 120., 0., 0.);
169 AliMatrix(irotdm, 90., 180., 90., 270., 180., 0.);
171 zdist = TMath::Abs(zdist1);
174 //Subhasis, dimensional parameters of rhombus (dpara) as given to gsvolu
175 // rhombus to accomodate 72 x 72 hexagons, and with total 1.2cm extension
176 //(1mm tolerance on both side and 5mm thick G10 wall)
179 // **** CELL SIZE 20 mm^2 EQUIVALENT
181 // Inner hexagon filled with gas (Ar+CO2)
183 Float_t hexd2[10] = {0.,360.,6,2,-0.25,0.,0.23,0.25,0.,0.23};
185 hexd2[4]= - cell_depth/2.;
186 hexd2[7]= cell_depth/2.;
187 hexd2[6]= cell_radius - cell_wall;
188 hexd2[9]= cell_radius - cell_wall;
190 // Gas replaced by vacuum for v0(insensitive) version of PMD.
192 gMC->Gsvolu("ECAR", "PGON", idtmed[697], hexd2,10);
193 gMC->Gsatt("ECAR", "SEEN", 0);
195 // Outer hexagon made of Copper
197 Float_t hexd1[10] = {0.,360.,6,2,-0.25,0.,0.25,0.25,0.,0.25};
198 //total wall thickness=0.2*2
200 hexd1[4]= - cell_depth/2.;
201 hexd1[7]= cell_depth/2.;
202 hexd1[6]= cell_radius;
203 hexd1[9]= cell_radius;
205 gMC->Gsvolu("ECCU", "PGON", idtmed[614], hexd1,10);
206 gMC->Gsatt("ECCU", "SEEN", 1);
208 // --- place inner hex inside outer hex
210 gMC->Gspos("ECAR", 1, "ECCU", 0., 0., 0., 0, "ONLY");
212 // Rhombus shaped supermodules (defined by PARA)
214 // volume for SUPERMODULE
216 Float_t dpara_sm1[6] = {12.5,12.5,0.8,30.,0.,0.};
217 dpara_sm1[0]=(ncell_sm+0.25)*hexd1[6] ;
218 dpara_sm1[1] = dpara_sm1[0] *root3_2;
219 dpara_sm1[2] = sm_thick/2.;
222 gMC->Gsvolu("ESMA","PARA", idtmed[607], dpara_sm1, 6);
223 gMC->Gsatt("ESMA", "SEEN", 0);
225 gMC->Gsvolu("ESMB","PARA", idtmed[607], dpara_sm1, 6);
226 gMC->Gsatt("ESMB", "SEEN", 0);
228 // Air residing between the PCB and the base
230 Float_t dpara_air[6] = {12.5,12.5,8.,30.,0.,0.};
231 dpara_air[0]= dpara_sm1[0];
232 dpara_air[1]= dpara_sm1[1];
233 dpara_air[2]= th_air/2.;
235 gMC->Gsvolu("EAIR","PARA", idtmed[698], dpara_air, 6);
236 gMC->Gsatt("EAIR", "SEEN", 0);
238 // volume for honeycomb chamber EHC1
240 Float_t dpara1[6] = {12.5,12.5,0.4,30.,0.,0.};
241 dpara1[0] = dpara_sm1[0];
242 dpara1[1] = dpara_sm1[1];
243 dpara1[2] = cell_depth/2.;
245 gMC->Gsvolu("EHC1","PARA", idtmed[698], dpara1, 6);
246 gMC->Gsatt("EHC1", "SEEN", 1);
250 // Place hexagonal cells ECCU cells inside EHC1 (72 X 72)
254 yb = -dpara1[1] + (1./root3_2)*hexd1[6];
257 for (j = 1; j <= ncell_sm; ++j) {
258 xb =-(dpara1[0] + dpara1[1]*0.577) + 2*hexd1[6]; //0.577=tan(30deg)
260 xb = xb+(xrow-1)*hexd1[6];
262 for (i = 1; i <= ncell_sm; ++i) {
263 number = i+(j-1)*ncell_sm;
264 gMC->Gspos("ECCU", number, "EHC1", xb,yb,zb, ihrotm, "ONLY");
268 yb += (hexd1[6]*TMath::Sqrt(3.));
272 // Place EHC1 and EAIR into ESMA and ESMB
274 Float_t z_air1,z_air2,z_gas;
276 //ESMA is normal supermodule with base at bottom, with EHC1
277 z_air1= -dpara_sm1[2] + th_base + dpara_air[2];
278 gMC->Gspos("EAIR", 1, "ESMA", 0., 0., z_air1, 0, "ONLY");
279 z_gas=z_air1+dpara_air[2]+ th_pcb + dpara1[2];
280 //Line below Commented for version 0 of PMD routine
281 // gMC->Gspos("EHC1", 1, "ESMA", 0., 0., z_gas, 0, "ONLY");
282 z_air2=z_gas+dpara1[2]+ th_pcb + dpara_air[2];
283 gMC->Gspos("EAIR", 2, "ESMA", 0., 0., z_air2, 0, "ONLY");
285 // ESMB is mirror image of ESMA, with base at top, with EHC1
287 z_air1= -dpara_sm1[2] + th_pcb + dpara_air[2];
288 gMC->Gspos("EAIR", 3, "ESMB", 0., 0., z_air1, 0, "ONLY");
289 z_gas=z_air1+dpara_air[2]+ th_pcb + dpara1[2];
290 //Line below Commented for version 0 of PMD routine
291 // gMC->Gspos("EHC1", 2, "ESMB", 0., 0., z_gas, 0, "ONLY");
292 z_air2=z_gas+dpara1[2]+ th_pcb + dpara_air[2];
293 gMC->Gspos("EAIR", 4, "ESMB", 0., 0., z_air2, 0, "ONLY");
296 // special supermodule EMM2(GEANT only) containing 6 unit modules
298 // volume for SUPERMODULE
300 Float_t dpara_sm2[6] = {12.5,12.5,0.8,30.,0.,0.};
301 dpara_sm2[0]=(ncell_sm+0.25)*hexd1[6] ;
302 dpara_sm2[1] = (ncell_sm - ncell_hole + 0.25) * root3_2 * hexd1[6];
303 dpara_sm2[2] = sm_thick/2.;
305 gMC->Gsvolu("ESMX","PARA", idtmed[607], dpara_sm2, 6);
306 gMC->Gsatt("ESMX", "SEEN", 0);
308 gMC->Gsvolu("ESMY","PARA", idtmed[607], dpara_sm2, 6);
309 gMC->Gsatt("ESMY", "SEEN", 0);
311 Float_t dpara2[6] = {12.5,12.5,0.4,30.,0.,0.};
312 dpara2[0] = dpara_sm2[0];
313 dpara2[1] = dpara_sm2[1];
314 dpara2[2] = cell_depth/2.;
316 gMC->Gsvolu("EHC2","PARA", idtmed[698], dpara2, 6);
317 gMC->Gsatt("EHC2", "SEEN", 1);
320 // Air residing between the PCB and the base
322 Float_t dpara2_air[6] = {12.5,12.5,8.,30.,0.,0.};
323 dpara2_air[0]= dpara_sm2[0];
324 dpara2_air[1]= dpara_sm2[1];
325 dpara2_air[2]= th_air/2.;
327 gMC->Gsvolu("EAIX","PARA", idtmed[698], dpara2_air, 6);
328 gMC->Gsatt("EAIX", "SEEN", 0);
330 // Place hexagonal single cells ECCU inside EHC2
331 // skip cells which go into the hole in top left corner.
334 yb = -dpara2[1] + (1./root3_2)*hexd1[6];
336 for (j = 1; j <= (ncell_sm - ncell_hole); ++j) {
337 xb =-(dpara2[0] + dpara2[1]*0.577) + 2*hexd1[6];
339 xb = xb+(xrow-1)*hexd1[6];
341 for (i = 1; i <= ncell_sm; ++i) {
342 number = i+(j-1)*ncell_sm;
343 gMC->Gspos("ECCU", number, "EHC2", xb,yb,zb, ihrotm, "ONLY");
347 yb += (hexd1[6]*TMath::Sqrt(3.));
351 // ESMX is normal supermodule with base at bottom, with EHC2
353 z_air1= -dpara_sm2[2] + th_base + dpara2_air[2];
354 gMC->Gspos("EAIX", 1, "ESMX", 0., 0., z_air1, 0, "ONLY");
355 z_gas=z_air1+dpara2_air[2]+ th_pcb + dpara2[2];
356 //Line below Commented for version 0 of PMD routine
357 // gMC->Gspos("EHC2", 1, "ESMX", 0., 0., z_gas, 0, "ONLY");
358 z_air2=z_gas+dpara2[2]+ th_pcb + dpara2_air[2];
359 gMC->Gspos("EAIX", 2, "ESMX", 0., 0., z_air2, 0, "ONLY");
361 // ESMY is mirror image of ESMX with base at bottom, with EHC2
363 z_air1= -dpara_sm2[2] + th_pcb + dpara2_air[2];
364 gMC->Gspos("EAIX", 3, "ESMY", 0., 0., z_air1, 0, "ONLY");
365 z_gas=z_air1+dpara2_air[2]+ th_pcb + dpara2[2];
366 //Line below Commented for version 0 of PMD routine
367 // gMC->Gspos("EHC2", 2, "ESMY", 0., 0., z_gas, 0, "ONLY");
368 z_air2=z_gas+dpara2[2]+ th_pcb + dpara2_air[2];
369 gMC->Gspos("EAIX", 4, "ESMY", 0., 0., z_air2, 0, "ONLY");
374 // special supermodule EMM3 (GEANT only) containing 2 unit modules
376 // volume for SUPERMODULE
378 Float_t dpara_sm3[6] = {12.5,12.5,0.8,30.,0.,0.};
379 dpara_sm3[0]=(ncell_sm - ncell_hole +0.25)*hexd1[6] ;
380 dpara_sm3[1] = (ncell_hole + 0.25) * hexd1[6] * root3_2;
381 dpara_sm3[2] = sm_thick/2.;
383 gMC->Gsvolu("ESMP","PARA", idtmed[607], dpara_sm3, 6);
384 gMC->Gsatt("ESMP", "SEEN", 0);
386 gMC->Gsvolu("ESMQ","PARA", idtmed[607], dpara_sm3, 6);
387 gMC->Gsatt("ESMQ", "SEEN", 0);
389 Float_t dpara3[6] = {12.5,12.5,0.4,30.,0.,0.};
390 dpara3[0] = dpara_sm3[0];
391 dpara3[1] = dpara_sm3[1];
392 dpara3[2] = cell_depth/2.;
394 gMC->Gsvolu("EHC3","PARA", idtmed[698], dpara3, 6);
395 gMC->Gsatt("EHC3", "SEEN", 1);
398 // Air residing between the PCB and the base
400 Float_t dpara3_air[6] = {12.5,12.5,8.,30.,0.,0.};
401 dpara3_air[0]= dpara_sm3[0];
402 dpara3_air[1]= dpara_sm3[1];
403 dpara3_air[2]= th_air/2.;
405 gMC->Gsvolu("EAIP","PARA", idtmed[698], dpara3_air, 6);
406 gMC->Gsatt("EAIP", "SEEN", 0);
409 // Place hexagonal single cells ECCU inside EHC3
410 // skip cells which go into the hole in top left corner.
413 yb = -dpara3[1] + (1./root3_2)*hexd1[6];
415 for (j = 1; j <= ncell_hole; ++j) {
416 xb =-(dpara3[0] + dpara3[1]*0.577) + 2*hexd1[6];
418 xb = xb+(xrow-1)*hexd1[6];
420 for (i = 1; i <= (ncell_sm - ncell_hole); ++i) {
421 number = i+(j-1)*(ncell_sm - ncell_hole);
422 gMC->Gspos("ECCU", number, "EHC3", xb,yb,zb, ihrotm, "ONLY");
426 yb += (hexd1[6]*TMath::Sqrt(3.));
429 // ESMP is normal supermodule with base at bottom, with EHC3
431 z_air1= -dpara_sm3[2] + th_base + dpara3_air[2];
432 gMC->Gspos("EAIP", 1, "ESMP", 0., 0., z_air1, 0, "ONLY");
433 z_gas=z_air1+dpara3_air[2]+ th_pcb + dpara3[2];
434 //Line below Commented for version 0 of PMD routine
435 // gMC->Gspos("EHC3", 1, "ESMP", 0., 0., z_gas, 0, "ONLY");
436 z_air2=z_gas+dpara3[2]+ th_pcb + dpara3_air[2];
437 gMC->Gspos("EAIP", 2, "ESMP", 0., 0., z_air2, 0, "ONLY");
439 // ESMQ is mirror image of ESMP with base at bottom, with EHC3
441 z_air1= -dpara_sm3[2] + th_pcb + dpara3_air[2];
442 gMC->Gspos("EAIP", 3, "ESMQ", 0., 0., z_air1, 0, "ONLY");
443 z_gas=z_air1+dpara3_air[2]+ th_pcb + dpara3[2];
444 //Line below Commented for version 0 of PMD routine
445 // gMC->Gspos("EHC3", 2, "ESMQ", 0., 0., z_gas, 0, "ONLY");
446 z_air2=z_gas+dpara3[2]+ th_pcb + dpara3_air[2];
447 gMC->Gspos("EAIP", 4, "ESMQ", 0., 0., z_air2, 0, "ONLY");
451 //_____________________________________________________________________________
453 void AliPMDv0::CreatePMD()
456 // Create final detector from supermodules
458 // -- Author : Y.P. VIYOGI, 07/05/1996.
459 // -- Modified: P.V.K.S.Baba(JU), 15-12-97.
460 // -- Modified: For New Geometry YPV, March 2001.
463 const Float_t root3_2 = TMath::Sqrt(3.)/2.;
464 const Float_t pi = 3.14159;
470 Int_t jhrot12,jhrot13, irotdm;
472 Int_t *idtmed = fIdtmed->GetArray()-599;
474 // VOLUMES Names : begining with "E" for all PMD volumes,
475 // The names of SIZE variables begin with S and have more meaningful
476 // characters as shown below.
478 // VOLUME SIZE MEDIUM : REMARKS
479 // ------ ----- ------ : ---------------------------
481 // EPMD GASPMD AIR : INSIDE PMD and its SIZE
483 // *** Define the EPMD Volume and fill with air ***
486 // Gaspmd, the dimension of HEXAGONAL mother volume of PMD,
489 Float_t gaspmd[10] = {0.,360.,6,2,-4.,12.,150.,4.,12.,150.};
491 gaspmd[5] = ncell_hole * cell_radius * 2. * root3_2;
492 gaspmd[8] = gaspmd[5];
494 gMC->Gsvolu("EPMD", "PGON", idtmed[698], gaspmd, 10);
495 gMC->Gsatt("EPMD", "SEEN", 0);
497 AliMatrix(irotdm, 90., 0., 90., 90., 180., 0.);
499 AliMatrix(jhrot12, 90., 120., 90., 210., 0., 0.);
500 AliMatrix(jhrot13, 90., 240., 90., 330., 0., 0.);
503 Float_t dm_thick = 2. * sm_thick + th_lead + th_steel;
505 // dpara_emm1 array contains parameters of the imaginary volume EMM1,
506 // EMM1 is a master module of type 1, which has 24 copies in the PMD.
507 // EMM1 : normal volume as in old cases
510 Float_t dpara_emm1[6] = {12.5,12.5,0.8,30.,0.,0.};
511 dpara_emm1[0] = sm_length/2.;
512 dpara_emm1[1] = dpara_emm1[0] *root3_2;
513 dpara_emm1[2] = dm_thick/2.;
515 gMC->Gsvolu("EMM1","PARA", idtmed[698], dpara_emm1, 6);
516 gMC->Gsatt("EMM1", "SEEN", 1);
519 // --- DEFINE Modules, iron, and lead volumes
521 // Pb Convertor for EMM1
522 Float_t dpara_pb1[6] = {12.5,12.5,8.,30.,0.,0.};
523 dpara_pb1[0] = sm_length/2.;
524 dpara_pb1[1] = dpara_pb1[0] * root3_2;
525 dpara_pb1[2] = th_lead/2.;
527 gMC->Gsvolu("EPB1","PARA", idtmed[600], dpara_pb1, 6);
528 gMC->Gsatt ("EPB1", "SEEN", 0);
530 // Fe Support for EMM1
531 Float_t dpara_fe1[6] = {12.5,12.5,8.,30.,0.,0.};
532 dpara_fe1[0] = dpara_pb1[0];
533 dpara_fe1[1] = dpara_pb1[1];
534 dpara_fe1[2] = th_steel/2.;
536 gMC->Gsvolu("EFE1","PARA", idtmed[618], dpara_fe1, 6);
537 gMC->Gsatt ("EFE1", "SEEN", 0);
542 // position supermodule ESMA, ESMB, EPB1, EFE1 inside EMM1
544 Float_t z_ps,z_pb,z_fe,z_cv;
546 z_ps = - dpara_emm1[2] + sm_thick/2.;
547 gMC->Gspos("ESMB", 1, "EMM1", 0., 0., z_ps, 0, "ONLY");
548 z_pb=z_ps+sm_thick/2.+dpara_pb1[2];
549 gMC->Gspos("EPB1", 1, "EMM1", 0., 0., z_pb, 0, "ONLY");
550 z_fe=z_pb+dpara_pb1[2]+dpara_fe1[2];
551 gMC->Gspos("EFE1", 1, "EMM1", 0., 0., z_fe, 0, "ONLY");
552 z_cv=z_fe+dpara_fe1[2]+sm_thick/2.;
553 gMC->Gspos("ESMA", 1, "EMM1", 0., 0., z_cv, 0, "ONLY");
557 // EMM2 : special master module having full row of cells but the number
558 // of rows limited by hole.
560 Float_t dpara_emm2[6] = {12.5,12.5,0.8,30.,0.,0.};
561 dpara_emm2[0] = sm_length/2.;
562 dpara_emm2[1] = (ncell_sm - ncell_hole + 0.25) * cell_radius * root3_2;
563 dpara_emm2[2] = dm_thick/2.;
565 gMC->Gsvolu("EMM2","PARA", idtmed[698], dpara_emm2, 6);
566 gMC->Gsatt("EMM2", "SEEN", 1);
569 // Pb Convertor for EMM2
570 Float_t dpara_pb2[6] = {12.5,12.5,8.,30.,0.,0.};
571 dpara_pb2[0] = dpara_emm2[0];
572 dpara_pb2[1] = dpara_emm2[1];
573 dpara_pb2[2] = th_lead/2.;
575 gMC->Gsvolu("EPB2","PARA", idtmed[600], dpara_pb2, 6);
576 gMC->Gsatt ("EPB2", "SEEN", 0);
578 // Fe Support for EMM2
579 Float_t dpara_fe2[6] = {12.5,12.5,8.,30.,0.,0.};
580 dpara_fe2[0] = dpara_pb2[0];
581 dpara_fe2[1] = dpara_pb2[1];
582 dpara_fe2[2] = th_steel/2.;
584 gMC->Gsvolu("EFE2","PARA", idtmed[618], dpara_fe2, 6);
585 gMC->Gsatt ("EFE2", "SEEN", 0);
589 // position supermodule ESMX, ESMY inside EMM2
591 z_ps = - dpara_emm2[2] + sm_thick/2.;
592 gMC->Gspos("ESMY", 1, "EMM2", 0., 0., z_ps, 0, "ONLY");
593 z_pb = z_ps + sm_thick/2.+dpara_pb2[2];
594 gMC->Gspos("EPB2", 1, "EMM2", 0., 0., z_pb, 0, "ONLY");
595 z_fe = z_pb + dpara_pb2[2]+dpara_fe2[2];
596 gMC->Gspos("EFE2", 1, "EMM2", 0., 0., z_fe, 0, "ONLY");
597 z_cv = z_fe + dpara_fe2[2]+sm_thick/2.;
598 gMC->Gspos("ESMX", 1, "EMM2", 0., 0., z_cv, 0, "ONLY");
602 // EMM3 : special master module having truncated rows and columns of cells
605 Float_t dpara_emm3[6] = {12.5,12.5,0.8,30.,0.,0.};
606 dpara_emm3[0] = dpara_emm2[1]/root3_2;
607 dpara_emm3[1] = (ncell_hole + 0.25) * cell_radius *root3_2;
608 dpara_emm3[2] = dm_thick/2.;
610 gMC->Gsvolu("EMM3","PARA", idtmed[698], dpara_emm3, 6);
611 gMC->Gsatt("EMM3", "SEEN", 1);
614 // Pb Convertor for EMM3
615 Float_t dpara_pb3[6] = {12.5,12.5,8.,30.,0.,0.};
616 dpara_pb3[0] = dpara_emm3[0];
617 dpara_pb3[1] = dpara_emm3[1];
618 dpara_pb3[2] = th_lead/2.;
620 gMC->Gsvolu("EPB3","PARA", idtmed[600], dpara_pb3, 6);
621 gMC->Gsatt ("EPB3", "SEEN", 0);
623 // Fe Support for EMM3
624 Float_t dpara_fe3[6] = {12.5,12.5,8.,30.,0.,0.};
625 dpara_fe3[0] = dpara_pb3[0];
626 dpara_fe3[1] = dpara_pb3[1];
627 dpara_fe3[2] = th_steel/2.;
629 gMC->Gsvolu("EFE3","PARA", idtmed[618], dpara_fe3, 6);
630 gMC->Gsatt ("EFE3", "SEEN", 0);
634 // position supermodule ESMP, ESMQ inside EMM3
636 z_ps = - dpara_emm3[2] + sm_thick/2.;
637 gMC->Gspos("ESMQ", 1, "EMM3", 0., 0., z_ps, 0, "ONLY");
638 z_pb = z_ps + sm_thick/2.+dpara_pb3[2];
639 gMC->Gspos("EPB3", 1, "EMM3", 0., 0., z_pb, 0, "ONLY");
640 z_fe = z_pb + dpara_pb3[2]+dpara_fe3[2];
641 gMC->Gspos("EFE3", 1, "EMM3", 0., 0., z_fe, 0, "ONLY");
642 z_cv = z_fe + dpara_fe3[2] + sm_thick/2.;
643 gMC->Gspos("ESMP", 1, "EMM3", 0., 0., z_cv, 0, "ONLY");
646 // EHOL is a tube structure made of air
650 //d_hole[1] = ncell_hole * cell_radius *2. * root3_2 + boundary;
651 //d_hole[2] = dm_thick/2.;
653 //gMC->Gsvolu("EHOL", "TUBE", idtmed[698], d_hole, 3);
654 //gMC->Gsatt("EHOL", "SEEN", 1);
656 //Al-rod as boundary of the supermodules
659 Al_rod[0] = sm_length * 3/2. - gaspmd[5]/2 - boundary ;
660 Al_rod[1] = boundary;
661 Al_rod[2] = dm_thick/2.;
663 gMC->Gsvolu("EALM","BOX ", idtmed[698], Al_rod, 3);
664 gMC->Gsatt ("EALM", "SEEN", 1);
666 xalm[0]=Al_rod[0] + gaspmd[5] + 3.0*boundary;
672 yalm[1]=xalm[0]*root3_2;
675 // delx = full side of the supermodule
676 Float_t delx=sm_length * 3.;
677 Float_t x1= delx*root3_2 /2.;
681 // placing master modules and Al-rod in PMD
683 Float_t dx = sm_length;
684 Float_t dy = dx * root3_2;
686 Float_t xsup[9] = {-dx/2., dx/2., 3.*dx/2.,
688 -3.*dx/2., -dx/2., dx/2.};
690 Float_t ysup[9] = {dy, dy, dy,
694 // xpos and ypos are the x & y coordinates of the centres of EMM1 volumes
696 Float_t xoff = boundary * TMath::Tan(pi/6.);
697 Float_t xmod[3]={x4 + xoff , x4 + xoff, -2.*x4-boundary/root3_2};
698 Float_t ymod[3] = {-x1 - boundary, x1 + boundary, 0.};
699 Float_t xpos[9], ypos[9], x2, y2, x3, y3;
701 Float_t xemm2 = sm_length/2. -
702 (ncell_sm + ncell_hole + 0.25) * cell_radius * 0.5
704 Float_t yemm2 = -(ncell_sm + ncell_hole + 0.25) * cell_radius * root3_2
707 Float_t xemm3 = (ncell_sm + 0.5 * ncell_hole + 0.25) * cell_radius + xoff;
708 Float_t yemm3 = - (ncell_hole - 0.25) * cell_radius * root3_2 - boundary;
710 Float_t theta[3] = {0., 2.*pi/3., 4.*pi/3.};
711 Int_t irotate[3] = {0, jhrot12, jhrot13};
714 for (j=0; j<3; ++j) {
715 gMC->Gspos("EALM", j+1, "EPMD", xalm[j],yalm[j], 0., irotate[j], "ONLY");
716 x2=xemm2*TMath::Cos(theta[j]) - yemm2*TMath::Sin(theta[j]);
717 y2=xemm2*TMath::Sin(theta[j]) + yemm2*TMath::Cos(theta[j]);
719 gMC->Gspos("EMM2", j+1, "EPMD", x2,y2, 0., irotate[j], "ONLY");
721 x3=xemm3*TMath::Cos(theta[j]) - yemm3*TMath::Sin(theta[j]);
722 y3=xemm3*TMath::Sin(theta[j]) + yemm3*TMath::Cos(theta[j]);
724 gMC->Gspos("EMM3", j+4, "EPMD", x3,y3, 0., irotate[j], "ONLY");
726 for (i=1; i<9; ++i) {
727 xpos[i]=xmod[j] + xsup[i]*TMath::Cos(theta[j]) - ysup[i]*TMath::Sin(theta[j]);
728 ypos[i]=ymod[j] + xsup[i]*TMath::Sin(theta[j]) + ysup[i]*TMath::Cos(theta[j]);
730 printf("%s: %f %f \n", ClassName(), xpos[i], ypos[i]);
735 printf("\n%s: Num_mod %d\n",ClassName(),num_mod);
737 gMC->Gspos("EMM1", num_mod + 6, "EPMD", xpos[i],ypos[i], 0., irotate[j], "ONLY");
743 // place EHOL in the centre of EPMD
744 // gMC->Gspos("EHOL", 1, "EPMD", 0.,0.,0., 0, "ONLY");
746 // --- Place the EPMD in ALICE
751 gMC->Gspos("EPMD", 1, "ALIC", xp,yp,zp, 0, "ONLY");
756 //_____________________________________________________________________________
757 void AliPMDv0::DrawModule()
760 // Draw a shaded view of the Photon Multiplicity Detector
763 gMC->Gsatt("*", "seen", -1);
764 gMC->Gsatt("alic", "seen", 0);
766 // Set the visibility of the components
768 gMC->Gsatt("ECAR","seen",0);
769 gMC->Gsatt("ECCU","seen",1);
770 gMC->Gsatt("EHC1","seen",1);
771 gMC->Gsatt("EHC1","seen",1);
772 gMC->Gsatt("EHC2","seen",1);
773 gMC->Gsatt("EMM1","seen",1);
774 gMC->Gsatt("EHOL","seen",1);
775 gMC->Gsatt("EPMD","seen",0);
777 gMC->Gdopt("hide", "on");
778 gMC->Gdopt("shad", "on");
779 gMC->Gsatt("*", "fill", 7);
780 gMC->SetClipBox(".");
781 gMC->SetClipBox("*", 0, 3000, -3000, 3000, -6000, 6000);
783 gMC->Gdraw("alic", 40, 30, 0, 22, 20.5, .02, .02);
784 gMC->Gdhead(1111, "Photon Multiplicity Detector Version 1");
786 //gMC->Gdman(17, 5, "MAN");
787 gMC->Gdopt("hide", "off");
790 //_____________________________________________________________________________
791 void AliPMDv0::CreateMaterials()
794 // Create materials for the PMD
796 // ORIGIN : Y. P. VIYOGI
799 // --- The Argon- CO2 mixture ---
800 Float_t ag[2] = { 39.95 };
801 Float_t zg[2] = { 18. };
802 Float_t wg[2] = { .8,.2 };
803 Float_t dar = .001782; // --- Ar density in g/cm3 ---
805 Float_t ac[2] = { 12.,16. };
806 Float_t zc[2] = { 6.,8. };
807 Float_t wc[2] = { 1.,2. };
808 Float_t dc = .001977;
809 Float_t dco = .002; // --- CO2 density in g/cm3 ---
811 Float_t absl, radl, a, d, z;
815 //Float_t dxe=0.005858;
818 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
819 Float_t zsteel[4] = { 26.,24.,28.,14. };
820 Float_t wsteel[4] = { .715,.18,.1,.005 };
822 Int_t *idtmed = fIdtmed->GetArray()-599;
823 Int_t isxfld = gAlice->Field()->Integ();
824 Float_t sxmgmx = gAlice->Field()->Max();
826 // --- Define the various materials for GEANT ---
827 AliMaterial(1, "Pb $", 207.19, 82., 11.35, .56, 18.5);
829 AliMaterial(2, "Argon$", 39.95, 18., dar, x0ar, 6.5e4);
830 AliMixture(3, "CO2 $", ac, zc, dc, -2, wc);
831 AliMaterial(4, "Al $", 26.98, 13., 2.7, 8.9, 18.5);
832 AliMaterial(6, "Fe $", 55.85, 26., 7.87, 1.76, 18.5);
833 AliMaterial(7, "W $", 183.85, 74., 19.3, .35, 10.3);
834 AliMaterial(8, "G10 $", 20., 10., 1.7, 19.4, 999.);
835 AliMaterial(9, "SILIC$", 28.09, 14., 2.33, 9.36, 45.);
836 AliMaterial(10, "Be $", 9.01, 4., 1.848, 35.3, 36.7);
837 AliMaterial(15, "Cu $", 63.54, 29., 8.96, 1.43, 15.);
838 AliMaterial(16, "C $", 12.01, 6., 2.265, 18.8, 49.9);
839 AliMaterial(17, "POLYCARBONATE $", 20., 10., 1.2, 34.6, 999.);
840 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
841 // AliMaterial(31, "Xenon$", 131.3, 54., dxe, x0xe, 6.5e4);
843 AliMaterial(96, "MYLAR$", 8.73, 4.55, 1.39, 28.7, 62.);
844 AliMaterial(97, "CONCR$", 20., 10., 2.5, 10.7, 40.);
845 AliMaterial(98, "Vacum$", 1e-9, 1e-9, 1e-9, 1e16, 1e16);
846 AliMaterial(99, "Air $", 14.61, 7.3, .0012, 30420., 67500.);
848 // define gas-mixtures
851 gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
854 dg = (dar * 4 + dco) / 5;
855 AliMixture(5, "ArCO2$", ag, zg, dg, 2, wg);
857 // Define tracking media
858 AliMedium(1, "Pb conv.$", 1, 0, 0, isxfld, sxmgmx, 1., .1, .01, .1);
859 AliMedium(7, "W conv.$", 7, 0, 0, isxfld, sxmgmx, 1., .1, .01, .1);
860 AliMedium(8, "G10plate$", 8, 0, 0, isxfld, sxmgmx, 1., .1, .01, .1);
861 AliMedium(4, "Al $", 4, 0, 0, isxfld, sxmgmx, .1, .1, .01, .1);
862 AliMedium(6, "Fe $", 6, 0, 0, isxfld, sxmgmx, .1, .1, .01, .1);
863 AliMedium(5, "ArCO2 $", 5, 1, 0, isxfld, sxmgmx, .1, .1, .1, .1);
864 AliMedium(9, "SILICON $", 9, 1, 0, isxfld, sxmgmx, .1, .1, .1, .1);
865 AliMedium(10, "Be $", 10, 0, 0, isxfld, sxmgmx, .1, .1, .01, .1);
866 AliMedium(98, "Vacuum $", 98, 0, 0, isxfld, sxmgmx, 1., .1, .1, 10);
867 AliMedium(99, "Air gaps$", 99, 0, 0, isxfld, sxmgmx, 1., .1, .1, .1);
868 AliMedium(15, "Cu $", 15, 0, 0, isxfld, sxmgmx, .1, .1, .01, .1);
869 AliMedium(16, "C $", 16, 0, 0, isxfld, sxmgmx, .1, .1, .01, .1);
870 AliMedium(17, "PLOYCARB$", 17, 0, 0, isxfld, sxmgmx, .1, .1, .01, .1);
871 AliMedium(19, " S steel$", 19, 0, 0, isxfld, sxmgmx, 1., .1, .01, .1);
872 // AliMedium(31, "Xenon $", 31, 1, 0, isxfld, sxmgmx, .1, .1, .1, .1);
874 // --- Generate explicitly delta rays in the iron, aluminium and lead ---
875 gMC->Gstpar(idtmed[600], "LOSS", 3.);
876 gMC->Gstpar(idtmed[600], "DRAY", 1.);
878 gMC->Gstpar(idtmed[603], "LOSS", 3.);
879 gMC->Gstpar(idtmed[603], "DRAY", 1.);
881 gMC->Gstpar(idtmed[604], "LOSS", 3.);
882 gMC->Gstpar(idtmed[604], "DRAY", 1.);
884 gMC->Gstpar(idtmed[605], "LOSS", 3.);
885 gMC->Gstpar(idtmed[605], "DRAY", 1.);
887 gMC->Gstpar(idtmed[606], "LOSS", 3.);
888 gMC->Gstpar(idtmed[606], "DRAY", 1.);
890 gMC->Gstpar(idtmed[607], "LOSS", 3.);
891 gMC->Gstpar(idtmed[607], "DRAY", 1.);
893 // --- Energy cut-offs in the Pb and Al to gain time in tracking ---
894 // --- without affecting the hit patterns ---
895 gMC->Gstpar(idtmed[600], "CUTGAM", 1e-4);
896 gMC->Gstpar(idtmed[600], "CUTELE", 1e-4);
897 gMC->Gstpar(idtmed[600], "CUTNEU", 1e-4);
898 gMC->Gstpar(idtmed[600], "CUTHAD", 1e-4);
899 gMC->Gstpar(idtmed[605], "CUTGAM", 1e-4);
900 gMC->Gstpar(idtmed[605], "CUTELE", 1e-4);
901 gMC->Gstpar(idtmed[605], "CUTNEU", 1e-4);
902 gMC->Gstpar(idtmed[605], "CUTHAD", 1e-4);
903 gMC->Gstpar(idtmed[606], "CUTGAM", 1e-4);
904 gMC->Gstpar(idtmed[606], "CUTELE", 1e-4);
905 gMC->Gstpar(idtmed[606], "CUTNEU", 1e-4);
906 gMC->Gstpar(idtmed[606], "CUTHAD", 1e-4);
907 gMC->Gstpar(idtmed[603], "CUTGAM", 1e-4);
908 gMC->Gstpar(idtmed[603], "CUTELE", 1e-4);
909 gMC->Gstpar(idtmed[603], "CUTNEU", 1e-4);
910 gMC->Gstpar(idtmed[603], "CUTHAD", 1e-4);
911 gMC->Gstpar(idtmed[609], "CUTGAM", 1e-4);
912 gMC->Gstpar(idtmed[609], "CUTELE", 1e-4);
913 gMC->Gstpar(idtmed[609], "CUTNEU", 1e-4);
914 gMC->Gstpar(idtmed[609], "CUTHAD", 1e-4);
916 // --- Prevent particles stopping in the gas due to energy cut-off ---
917 gMC->Gstpar(idtmed[604], "CUTGAM", 1e-5);
918 gMC->Gstpar(idtmed[604], "CUTELE", 1e-5);
919 gMC->Gstpar(idtmed[604], "CUTNEU", 1e-5);
920 gMC->Gstpar(idtmed[604], "CUTHAD", 1e-5);
921 gMC->Gstpar(idtmed[604], "CUTMUO", 1e-5);
924 //_____________________________________________________________________________
925 void AliPMDv0::Init()
928 // Initialises PMD detector after it has been built
934 printf("\n%s: ",ClassName());
935 for(i=0;i<35;i++) printf("*");
936 printf(" PMD_INIT ");
937 for(i=0;i<35;i++) printf("*");
938 printf("\n%s: ",ClassName());
939 printf(" PMD simulation package (v0) initialised\n");
940 printf("%s: parameters of pmd\n", ClassName());
941 printf("%s: %10.2f %10.2f %10.2f \
942 %10.2f\n",ClassName(),cell_radius,cell_wall,cell_depth,zdist1 );
943 printf("%s: ",ClassName());
944 for(i=0;i<80;i++) printf("*");
947 Int_t *idtmed = fIdtmed->GetArray()-599;
948 fMedSens=idtmed[605-1];
951 //_____________________________________________________________________________
952 void AliPMDv0::StepManager()
955 // Called at each step in the PMD
958 Float_t hits[4], destep;
959 Float_t center[3] = {0,0,0};
963 if(gMC->GetMedium() == fMedSens && (destep = gMC->Edep())) {
965 gMC->CurrentVolID(copy);
967 //namep=gMC->CurrentVolName();
968 //printf("Current vol is %s \n",namep);
971 gMC->CurrentVolOffID(1,copy);
973 //namep=gMC->CurrentVolOffName(1);
974 //printf("Current vol 11 is %s \n",namep);
977 gMC->CurrentVolOffID(2,copy);
979 //namep=gMC->CurrentVolOffName(2);
980 //printf("Current vol 22 is %s \n",namep);
984 // if(strncmp(namep,"EHC1",4))vol[2]=1;
986 gMC->CurrentVolOffID(3,copy);
988 //namep=gMC->CurrentVolOffName(3);
989 //printf("Current vol 33 is %s \n",namep);
992 gMC->CurrentVolOffID(4,copy);
994 //namep=gMC->CurrentVolOffName(4);
995 //printf("Current vol 44 is %s \n",namep);
998 //printf("volume number %d,%d,%d,%d,%d,%f \n",vol[0],vol[1],vol[2],vol[3],vol[4],destep*1000000);
1000 gMC->Gdtom(center,hits,1);
1001 hits[3] = destep*1e9; //Number in eV
1002 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
1007 //------------------------------------------------------------------------
1010 void AliPMDv0::GetParameters()
1012 Int_t ncell_um, num_um;
1018 cell_depth=0.25 * 2.;
1021 ncell_sm=ncell_um * num_um; //no. of cells in a row in one supermodule
1022 sm_length= ((ncell_sm + 0.25 ) * cell_radius) * 2.;
1028 sm_thick = th_base + th_air + th_pcb + cell_depth + th_pcb + th_air + th_pcb;