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 /////////////////////////////////////////////////////////////////////
20 // START ( T-zero) detector version 1 //
24 <img src="gif/AliSTARTv1Class.gif">
29 //////////////////////////////////////////////////////////////////////
31 #include <Riostream.h>
34 #include <TGeometry.h>
35 #include <TLorentzVector.h>
39 #include <TVirtualMC.h>
45 #include "AliSTARThit.h"
46 #include "AliSTARTv1.h"
47 #include "AliSTARTParameters.h"
50 #include "AliCDBLocal.h"
51 #include "AliCDBStorage.h"
52 #include "AliCDBManager.h"
53 #include "AliCDBEntry.h"
57 //--------------------------------------------------------------------
58 AliSTARTv1::AliSTARTv1(const char *name, const char *title):
62 // Standart constructor for START Detector version 0
67 //_____________________________________________________________________________
69 AliSTARTv1::~AliSTARTv1()
74 //-------------------------------------------------------------------------
75 void AliSTARTv1::CreateGeometry()
78 // Create the geometry of START Detector version 0
82 <img src="gif/AliSTARTv0.gif">
87 Int_t *idtmed = fIdtmed->GetArray();
89 AliSTARTParameters* param = AliSTARTParameters::Instance();
91 Float_t zdetC = param->GetZposition(0);
92 Float_t zdetA = param->GetZposition(1);
98 Float_t pstartR[18]={0., 360., 5.,
99 -76.5+0.00+69.7, 4.25, 10.,
100 -76.5+6.05+69.7, 4.5, 10.,
101 -76.5+8.05+69.7, 4.5, 10.,
102 -76.5+8.05+69.7, 5.1, 10.,
103 -62.9+0.00+69.7, 5.1, 10.};
105 Float_t pstart[3]={4.29, 12.5,6.95};
106 Float_t pinstart[3]={0.,1.6,6.5};
107 Float_t ppmt[3]={0.,1.5,3.5};
108 Float_t ptop[3]={0.,1.,1.5};
109 Float_t preg[3]={0., 1.0, 0.005}; //photcathode dobavil bogdanov
110 Float_t ptopout[3]={1.,1.01,1.5};
111 Float_t pbot[3]={0.6,1.2,0.1};
112 Float_t pglass[3]={1.2,1.3,2.};
113 Float_t pcer[3]={0.9,1.1,1.35};
114 Float_t psteel[3]={0.9,1.1,0.15};
115 Float_t psupport1[3] = {4.51,4.6,4.0};//C kozhuh vnutri
116 Float_t psupport2[3] = {9.4,9.5,4.0};// snaruzhi C
117 Float_t psupport3[3] = {4.51,9.5,0.05};//kryshki C
118 Float_t psupport5[3] = {1.44,1.5,6.5}; // stakanchik dlai feu C
119 Float_t psupport6[3] = {0,1.4,0.04}; //kryshechka stakanchika Al
120 Float_t psupport7[3] = {1.5,1.6,0.4}; //kolechko snaruzhu stakanchika Al
122 // Mother Volume katushka dlia krepezha vokrug truby k Absorbru
123 AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
133 ppcon[6] = ppcon[3]+1.;
143 ppcon[12] = ppcon[9]+0.1;
148 ppcon[15] = ppcon[12];
153 // ppcon[18] = ppcon[15]+7.05;
154 ppcon[18] = ppcon[15]+6.9;
159 ppcon[21] = ppcon[18];
164 ppcon[24] = ppcon[21]+0.01;
169 ppcon[27] = ppcon[24];
174 ppcon[30] = ppcon[27]+4.5;
179 ppcon[33] = ppcon[30];
184 ppcon[36] = ppcon[33];
189 ppcon[39] = ppcon[33]+0.4;
194 // ppcon[39] = ppcon[36];
200 gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,42);
202 gMC->Gspos("0SUP",1,"ALIC",0.,0.,z,idrotm[901],"ONLY");
204 //-------------------------------------------------------------------
206 //-------------------------------------------------------------------
209 gMC->Gsvolu("0STR","PCON",idtmed[kAir],pstartR,18);
210 gMC->Gsvolu("0STL","TUBE",idtmed[kAir],pstart,3);
211 gMC->Gspos("0STR",1,"ALIC",0.,0.,-zdetC-pstart[2],idrotm[901],"ONLY");
212 gMC->Gspos("0STL",1,"ALIC",0.,0.,zdetA+pstart[2],0,"ONLY");
215 gMC->Gsvolu("0INS","TUBE",idtmed[kAir],pinstart,3);
216 gMC->Gsvolu("0PMT","TUBE",idtmed[kAir],ppmt,3);
218 gMC->Gsvolu("0SU1","TUBE",idtmed[kC],psupport1,3);//C kozhuh vnutri
219 gMC->Gsvolu("0SU2","TUBE",idtmed[kC],psupport2,3);// snaruzhi C
220 gMC->Gsvolu("0SU3","TUBE",idtmed[kC],psupport3,3);//kryshka perednaiai C
221 gMC->Gsvolu("0SU4","TUBE",idtmed[kC],psupport3,3);//kryshka zadnaiai C
222 // gMC->Gsvolu("0SU5","TUBE",idtmed[kAir],psupport4,3);// dyrki dlia feu v zadnej kryshke Air
223 gMC->Gsvolu("0SU6","TUBE",idtmed[kC],psupport5,3);// stakanchik dlai feu C
224 gMC->Gsvolu("0SU7","TUBE",idtmed[kAl],psupport6,3);//kryshechka stakanchika Al
225 gMC->Gsvolu("0SU8","TUBE",idtmed[kAl],psupport7,3);//kolechko snaruzhu stakanchika Al
227 // first ring: 12 units of Scintillator+PMT+divider
228 Float_t theta = (180 / TMath::Pi()) * TMath::ATan(6.5 / zdetC);
229 AliInfo(Form("theta %f", theta));
230 Float_t angle = 2 * TMath::Pi() / 12;
233 for (is=0; is<12; is++)
236 x = 6.5 * TMath::Sin(is * angle);
237 y = 6.5 * TMath::Cos(is * angle);
240 phi[1] = 90 - is * 30;
241 phi[2] = 90 - is * 30;
242 for (Int_t j = 0; j < 3; j++)
243 if (phi[j] < 0) phi[j] += 360;
245 AliMatrix (idrotm[902 + is], 90., phi[0],
248 z=-pstart[2]+pinstart[2]+0.2;
249 gMC->Gspos ("0INS", is + 1, "0STR", x, y, z, idrotm[902 + is], "ONLY");
250 gMC->Gspos ("0INS", is + 13, "0STL", x, y, z, 0, "ONLY");
256 // z=-pinstart[2]+ppmt[2]+2.*psupport6[2]+0.1;
257 z=-pinstart[2]+ppmt[2]+psupport6[2]*2;
258 gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
261 // Entry window (glass)
262 gMC->Gsvolu("0TOP","TUBE",idtmed[kOpGlass],ptop,3); //glass
264 gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
265 //metal volume to simulate reclection
266 gMC->Gsvolu("0TOO","TUBE",idtmed[kOpAir],ptopout,3); //glass
267 // gMC->Gsvolu("0TOP","TUBE",idtmed[12],ptop,3); //lucite
268 gMC->Gspos("0TOO",1,"0PMT",0,0,z,0,"ONLY");
271 gMC->Gsvolu ("0REG", "TUBE", idtmed[kOpGlassCathode], preg, 3);
272 z = -ppmt[2] + 2 * ptop[2] + preg[2];
273 gMC->Gspos ("0REG", 1, "0PMT", 0, 0, z, 0, "ONLY");
275 gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
277 AliDebugClass(1,Form("Z bottom %f\n",z));
278 gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
279 // Side cylinder glass
280 gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
282 gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
283 //PMT electrodes support structure
284 gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
285 gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
286 z=-ppmt[2]+2*ptop[2]+0.3 + pcer[2];
287 gMC->Gspos("0CER",1,"0PMT",0,0,z,0,"ONLY");
288 z +=psteel[2]+pcer[2];
289 gMC->Gspos("0STE",1,"0PMT",0,0,z,0,"ONLY");
292 z=-pstart[2]+psupport1[2]+0.1;
293 gMC->Gspos("0SU1",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
294 gMC->Gspos("0SU2",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh vnutri
295 z=-pstart[2]+psupport3[2]+0.1;
296 gMC->Gspos("0SU3",1,"0STR",0,0,z,0,"ONLY"); //peredniaia kryshka
297 z=-pstart[2]+2.*psupport1[2]-0.05;//+0.1;
298 gMC->Gspos("0SU4",1,"0STR",0,0,z,0,"MANY"); //zadnaiai kryshka
299 gMC->Gspos("0SU6",1,"0INS",0,0,0,0,"ONLY");//C stakanchik dlia feu
300 z=-pinstart[2]+psupport6[2];
301 gMC->Gspos("0SU7",1,"0INS",0,0,z,0,"ONLY"); //Al kryshechka
303 z=pinstart[2]-psupport7[2];
304 gMC->Gspos("0SU8",1,"0INS",0,0,z,0,"ONLY"); //Al kolechko
311 gMC->Gsvolu("0SC0","TUBE",idtmed[kC],par,3);
313 gMC->Gspos("0SC0",1,"0SUP",0,0,z,0,"ONLY");
318 gMC->Gsvolu("0SC1","TUBE",idtmed[kC],par,3);
320 gMC->Gspos("0SC1",1,"0SUP",0,0,z,0,"ONLY");
325 gMC->Gsvolu("0SC2","TUBE",idtmed[kC],par,3);
327 gMC->Gspos("0SC2",1,"0SUP",0,0,z,0,"ONLY");
333 gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
336 gMC->Gspos("0SA1",1,"0SUP",0,0,z,0,"ONLY");
341 gMC->Gsvolu("0SA2","TUBE",idtmed[kAl],par,3);
343 gMC->Gspos("0SA2",1,"0SUP",0,0,z,0,"ONLY");
345 par[0]=3.16; // eta chast' prikruchena k absorberu
348 gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
350 gMC->Gspos("0SA3",1,"0SUP",0,0,z,0,"ONLY");
351 par[0]=3.16; // gvozdi eta chast' prikruchena k absorberu
354 gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
355 gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"ONLY");
359 //------------------------------------------------------------------------
360 void AliSTARTv1::CreateMaterials()
362 Int_t isxfld = gAlice->Field()->Integ();
363 Float_t sxmgmx = gAlice->Field()->Max();
364 // Float_t a,z,d,radl,absl,buf[1];
366 Int_t *idtmed = fIdtmed->GetArray();
370 Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
371 Float_t zAir[4]={6.,7.,8.,18.};
372 Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
373 Float_t dAir = 1.20479E-3;
376 Float_t ascin[2]={1.01,12.01};
377 Float_t zscin[2]={1,6};
378 Float_t wscin[2]={1,1};
379 Float_t denscin=1.03;
380 //Lucite C(CH3)CO2CH3
381 Float_t alucite[3]={1.01,12.01,15.999};
382 Float_t zlucite[3]={1,6,8};
383 Float_t wlucite[3]={8,5,2};
384 Float_t denlucite=1.16;
386 Float_t aglass[2]={28.0855,15.9994};
387 Float_t zglass[2]={14.,8.};
388 Float_t wglass[2]={1.,2.};
390 // Ceramic 97.2% Al2O3 , 2.8% SiO2
391 // Float_t wcer[2]={0.972,0.028};
392 Float_t aCeramic[2] = { 26.981539,15.9994 };
393 Float_t zCeramic[2] = { 13.,8. };
394 Float_t wCeramic[2] = { 2.,3. };
395 Float_t denscer = 3.6;
397 // Brass 80% Cu, 20% Zn
398 Float_t abrass[2] = {63.546,65.39};
399 Float_t zbrass[2] = {29,30};
400 Float_t wbrass[2] = {0.8,0.2};
401 Float_t denbrass=8.96;
404 Float_t aribber[3] = {12.,1.,32.};
405 Float_t zribber[3] = {6.,1.,16.};
406 Float_t wribber[3] = {6.,12.,1.};
407 Float_t denribber=0.8;
409 Float_t asupport[2] = {12.,1.};
410 Float_t zsupport[2] = {6.,1.};
411 Float_t wsupport[2] = {1.,1.};
412 Float_t densupport=0.1;
414 //*** Definition Of avaible START materials ***
415 AliMaterial(0, "Steel$", 55.850,26.,7.87,1.76,999);
416 AliMaterial(1, "Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
417 AliMixture(2, "Air$", aAir, zAir, dAir,4,wAir);
418 AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999);
419 AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999);
421 AliMixture( 3, "Ceramic $",aCeramic, zCeramic, denscer, -2, wCeramic);
422 AliMixture( 4, "PMT glass $",aglass,zglass,dglass,-2,wglass);
426 gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
430 gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
433 AliMixture( 11, "Ceramic $", acer, zcer, denscer, 2, wcer);
435 AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
436 AliMixture( 6, "Brass $", abrass, zbrass, denbrass, 2, wbrass);
437 AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
438 AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
439 AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
440 AliMixture( 21, "PMT Optical glass $",aglass,zglass,dglass,-2,wglass);
441 AliMixture( 24, "PMT Optical glass cathode $",aglass,zglass,dglass,-2,wglass);
442 AliMixture(22, "START Opt Air$", aAir, zAir, dAir,4,wAir);
443 AliMixture(23, "START Opt Air Next$", aAir, zAir, dAir,4,wAir);
445 AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
446 AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
447 AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
448 AliMedium(4, "Ceramic$", 3, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
449 AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
450 AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
451 AliMedium(9, "Ribber $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
452 AliMedium(11, "Brass $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
453 AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
454 AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
455 AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
456 AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
457 AliMedium(16, "OpticalGlass$", 21, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
458 AliMedium(17, "START OpAir$", 22, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
459 AliMedium(18, "START OpAirNext$", 23, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
460 AliMedium(19, "OpticalGlassCathode$", 24, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
463 // Definition Cherenkov parameters
465 const Int_t kNbins=31;
467 Float_t rindexSiO2[kNbins], efficAll[kNbins], rindexAir[kNbins], absorAir[kNbins],rindexCathodeNext[kNbins], absorbCathodeNext[kNbins];
470 Float_t aAbsSiO2[kNbins]={29.0, 28.6, 28.3, 27.7, 27.3, 26.7, 26.4,
471 25.9, 25.3, 24.9, 24.5, 23.7,
472 23.2, 22.8, 22.4, 21.8, 21.3,
473 22.8, 22.1, 21.7, 21.2, 20.5,
474 19.9, 19.3, 18.7, 18.0, 17.1,
475 16.3, 15.3, 14.3, 14.3 };
477 Float_t aPckov[kNbins] ={3.87, 3.94, 4.02, 4.11, 4.19, 4.29, 4.38,
478 4.48, 4.58, 4.69, 4.81, 4.93,
479 5.05, 5.19, 5.33, 5.48, 5.63,
480 5.8, 5.97, 6.16, 6.36, 6.57,
481 6.8, 7.04, 7.3, 7.58, 7.89,
482 8.22, 8.57, 8.97, 9.39 };
484 Float_t effCathode[kNbins]={0.11, 0.13, 0.15, 0.16, 0.18, 0.19, 0.20,
485 0.21, 0.22, 0.23, 0.24, 0.26,
486 0.27, 0.29, 0.30, 0.29, 0.29,
487 0.28, 0.28, 0.27, 0.26, 0.25,
488 0.25, 0.23, 0.20, 0.19, 0.17,
489 0.17, 0.17, 0.2, 0.23};
491 // Float_t aAbsSiO2[kNbins]; //quartz 30mm
492 for(i=0;i<kNbins;i++)
494 aPckov[i]=aPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV
496 rindexSiO2[i]=1.458; //refractive index for qwarts
497 rindexCathodeNext[i]=0;
500 // aAbsSiO2[i]=28.5; //quartz 30mm
502 absorbCathodeNext[i]=0;
507 gMC->SetCerenkov (idtmed[kOpGlass], kNbins, aPckov, aAbsSiO2, efficAll, rindexSiO2 );
508 // gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2, effCathode, rindexSiO2 );
509 gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2,efficAll , rindexSiO2 );
510 gMC->SetCerenkov (idtmed[kOpAir], kNbins, aPckov,absorAir , efficAll,rindexAir );
511 gMC->SetCerenkov (idtmed[kOpAirNext], kNbins, aPckov,absorbCathodeNext , efficAll, rindexCathodeNext);
513 AliDebugClass(1,": ++++++++++++++Medium set++++++++++");
517 //---------------------------------------------------------------------
518 void AliSTARTv1::DrawDetector()
521 // Draw a shaded view of the Forward multiplicity detector version 0
524 //Set ALIC mother transparent
525 gMC->Gsatt("ALIC","SEEN",0);
527 //Set volumes visible
528 // gMC->Gsatt("0STR","SEEN",0);
529 // gMC->Gsatt("0INS","SEEN",0);
530 // gMC->Gsatt("0PMT","SEEN",1);
531 // gMC->Gsatt("0DIV","SEEN",1);
533 gMC->Gdopt("hide","off");
534 gMC->Gdopt("shad","on");
535 gMC->SetClipBox(".");
536 gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
538 gMC->Gdraw("alic",90,0,0,-35,9.5,.6,0.6);
539 //gMC->Gdraw("alic",0,0,0,10,9.5,.8,0.8); //other side view
540 gMC->Gdhead(1111,"T-Zero detector");
541 gMC->Gdopt("hide","off");
544 //-------------------------------------------------------------------
545 void AliSTARTv1::Init()
547 // Initialises version 0 of the Forward Multiplicity Detector
549 //Int_t *idtmed = gAlice->Idtmed();
551 fIdSens1=gMC->VolId("0REG");
553 AliDebug(1,Form("%s: *** START version 1 initialized ***\n",ClassName()));
557 //-------------------------------------------------------------------
559 void AliSTARTv1::StepManager()
562 // Called for every step in the START Detector
565 static Float_t hits[6];
569 // TClonesArray &lhits = *fHits;
571 if(!gMC->IsTrackAlive()) return; // particle has disappeared
573 // If particles is photon then ...
575 if (gMC->TrackPid() == 50000050)
577 id=gMC->CurrentVolID(copy);
580 // Check the sensetive volume
582 if(gMC->IsTrackEntering()) {
583 gMC->CurrentVolOffID(2,copy);
585 gMC->CurrentVolOffID(3,copy1);
587 gMC->TrackPosition(pos);
591 if(pos[2]<0) vol[0]=2;
592 if(pos[2]>=0) vol[0]=1;
594 Float_t etot=gMC->Etot();
596 Int_t iPart= gMC->TrackPid();
597 Int_t partID=gMC->IdFromPDG(iPart);
599 Float_t ttime=gMC->TrackTime();
601 AddHit(fIshunt,vol,hits);
602 // cout<< gAlice->GetMCApp()->GetCurrentTrackNumber()<<" hit added "<<endl;
605 printf("track(%i) alive(%i) disap(%i) enter(%i) exit(%i) inside(%i) out(%i) stop(%i) new(%i) \n",
606 gAlice->GetMCApp()->GetCurrentTrackNumber(),
608 gMC->IsTrackDisappeared(),
609 gMC->IsTrackEntering(),
610 gMC->IsTrackExiting(),
611 gMC->IsTrackInside(),