- //
- // Ar-CO2 gas (80%+20%)
- Float_t ag1[3] = { 39.95,12.01,16. };
- Float_t zg1[3] = { 18.,6.,8. };
- Float_t wg1[3] = { .8,.0667,.13333 };
- Float_t dg1 = .001821;
- //
- // Ar-buthane-freon gas -- trigger chambers
- Float_t atr1[4] = { 39.95,12.01,1.01,19. };
- Float_t ztr1[4] = { 18.,6.,1.,9. };
- Float_t wtr1[4] = { .56,.1262857,.2857143,.028 };
- Float_t dtr1 = .002599;
- //
- // Ar-CO2 gas
- Float_t agas[3] = { 39.95,12.01,16. };
- Float_t zgas[3] = { 18.,6.,8. };
- Float_t wgas[3] = { .74,.086684,.173316 };
- Float_t dgas = .0018327;
- //
- // Ar-Isobutane gas (80%+20%) -- tracking
- Float_t ag[3] = { 39.95,12.01,1.01 };
- Float_t zg[3] = { 18.,6.,1. };
- Float_t wg[3] = { .8,.057,.143 };
- Float_t dg = .0019596;
- //
- // Ar-Isobutane-Forane-SF6 gas (49%+7%+40%+4%) -- trigger
- Float_t atrig[5] = { 39.95,12.01,1.01,19.,32.066 };
- Float_t ztrig[5] = { 18.,6.,1.,9.,16. };
- Float_t wtrig[5] = { .49,1.08,1.5,1.84,0.04 };
- Float_t dtrig = .0031463;
- //
- // bakelite: C6 H6 O
- Float_t abak[3] = {12.01 , 1.01 , 16.};
- Float_t zbak[3] = {6. , 1. , 8.};
- Float_t wbak[3] = {6. , 6. , 1.};
- Float_t dbak = 1.4;
-
- Int_t iSXFLD = gAlice->Field()->Integ();
- Float_t sXMGMX = gAlice->Field()->Max();
- //
- // --- Define the various materials for GEANT ---
- fMUON->AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
- fMUON->AliMaterial(10, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
- // Air
- Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
- Float_t zAir[4]={6.,7.,8.,18.};
- Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
- Float_t dAir = 1.20479E-3;
- fMUON->AliMixture(15, "AIR$ ", aAir, zAir, dAir,4, wAir);
- // fMUON->AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500);
- fMUON->AliMixture(19, "Bakelite$", abak, zbak, dbak, -3, wbak);
- fMUON->AliMixture(20, "ArC4H10 GAS$", ag, zg, dg, 3, wg);
- fMUON->AliMixture(21, "TRIG GAS$", atrig, ztrig, dtrig, -5, wtrig);
- fMUON->AliMixture(22, "ArCO2 80%$", ag1, zg1, dg1, 3, wg1);
- fMUON->AliMixture(23, "Ar-freon $", atr1, ztr1, dtr1, 4, wtr1);
- fMUON->AliMixture(24, "ArCO2 GAS$", agas, zgas, dgas, 3, wgas);
-
- // materials for slat:
- // Sensitive area: gas (already defined)
- // PCB: copper
- // insulating material: vetronite -> replacing by G10 Ch. Finck
- // spacer: noryl Ch. Finck
- // panel sandwich: carbon, nomex, carbon replacing rohacell by nomex Ch. Finck
-
- // G10: SiO2(60%) + C8H14O4(40%)
- Float_t aglass[5] = {12.01, 28.09, 16., 1.01, 16.};
- Float_t zglass[5] = { 6., 14., 8., 1., 8.};
- Float_t wglass[5] = { 0.22, 0.28, 0.32, 0.03, 0.15};
- Float_t dglass = 1.7;
-
- // rohacell: C9 H13 N1 O2
- Float_t arohac[4] = {12.01, 1.01, 14.010, 16.};
- Float_t zrohac[4] = { 6., 1., 7., 8.};
- Float_t wrohac[4] = { 9., 13., 1., 2.};
- Float_t drohac = 0.03;
-
- // Nomex: C22 H10 N2 O5
- Float_t aNomex[4] = {12.01, 1.01, 14.010, 16.};
- Float_t zNomex[4] = { 6., 1., 7., 8.};
- Float_t wNomex[4] = { 22., 10., 2., 5.};
- Float_t dNomex = 0.024; //honey comb
- Float_t dNomex2 = 1.43; //bulk material
-
-
- // Noryl: C8 H8 O polyphenylene oxyde (di-methyl not sure)
- Float_t aNoryl[3] = {12.01, 1.01, 16.};
- Float_t zNoryl[3] = { 6., 1., 8.};
- Float_t wNoryl[3] = { 8., 8., 1.};
- Float_t dNoryl = 1.06;
-
- fMUON->AliMaterial(31, "COPPER$", 63.54, 29., 8.96, 1.4, 0.);
- fMUON->AliMixture( 32, "G10$", aglass, zglass, dglass, -5, wglass);
- fMUON->AliMaterial(33, "Carbon$", 12.01, 6., 2.265, 18.8, 49.9);
- fMUON->AliMixture( 34, "Rohacell$", arohac, zrohac, drohac, -4, wrohac);
- fMUON->AliMixture( 35, "Nomex$", aNomex, zNomex, dNomex, -4, wNomex);
- fMUON->AliMixture( 36, "Noryl$", aNoryl, zNoryl, dNoryl, -3, wNoryl);
- fMUON->AliMixture( 37, "Nomex_bulk$",aNomex, zNomex, dNomex2, -4, wNomex);
-
- Float_t epsil = .001; // Tracking precision,
- Float_t stemax = -1.; // Maximum displacement for multiple scat
- Float_t tmaxfd = -20.; // Maximum angle due to field deflection
- Float_t deemax = -.3; // Maximum fractional energy loss, DLS
- Float_t stmin = -.8;
- Float_t maxDestepAlu = fMUON->GetMaxDestepAlu();
- Float_t maxDestepGas = fMUON->GetMaxDestepGas();
- Float_t maxStepAlu = fMUON->GetMaxStepAlu();
- Float_t maxStepGas = fMUON->GetMaxStepGas();
-
- //
- // Air
- fMUON->AliMedium(1, "AIR_CH_US ", 15, 1, iSXFLD, sXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
-
- //
- // Aluminum
- fMUON->AliMedium(4, "ALU_CH_US ", 9, 0, iSXFLD, sXMGMX, tmaxfd, maxStepAlu,
- maxDestepAlu, epsil, stmin);
- fMUON->AliMedium(5, "ALU_CH_US ", 10, 0, iSXFLD, sXMGMX, tmaxfd, maxStepAlu,
- maxDestepAlu, epsil, stmin);
- //
- // Ar-isoC4H10 gas
- fMUON->AliMedium(6, "AR_CH_US ", 20, 1, iSXFLD, sXMGMX, tmaxfd, maxStepGas,
- maxDestepGas, epsil, stmin);
- //
- // Ar-Isobuthane-Forane-SF6 gas
- fMUON->AliMedium(7, "GAS_CH_TRIGGER ", 21, 1, iSXFLD, sXMGMX, tmaxfd, stemax, deemax, epsil, stmin);