/**************************************************************************
* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
* *
* Author: The ALICE Off-line Project. *
* Contributors are mentioned in the code where appropriate. *
* *
* Permission to use, copy, modify and distribute this software and its *
* documentation strictly for non-commercial purposes is hereby granted *
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* about the suitability of this software for any purpose. It is *
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**************************************************************************/
/* $Id$ */
///////////////////////////////////////////////////////////////////////////////
// //
// Muon ABSOrber //
// This class contains the description of the muon absorber geometry //
// //
//Begin_Html
/*
The responsible person for this module is
Andreas Morsch.
*/ //End_Html // // // // /////////////////////////////////////////////////////////////////////////////// #include "AliABSOv0.h" #include "AliRun.h" #include "AliConst.h" ClassImp(AliABSOv0) //_____________________________________________________________________________ AliABSOv0::AliABSOv0() { // // Default constructor // } //_____________________________________________________________________________ AliABSOv0::AliABSOv0(const char *name, const char *title) : AliABSO(name,title) { // // Standard constructor // SetMarkerColor(7); SetMarkerStyle(2); SetMarkerSize(0.4); } //_____________________________________________________________________________ void AliABSOv0::CreateGeometry() { // // Creation of the geometry of the muon absorber // //Begin_Html /* */ //End_Html //Begin_Html /* */ //End_Html // // enum {kC=1605, kAl=1608, kFe=1609, kCu=1610, kW=1611, kPb=1612, kNiCuW=1620, kVacuum=1615, kAir=1614, kConcrete=1616, kPolyCH2=1617, kSteel=1609, kInsulation=1613, kPolyCc=1619}; Int_t *idtmed = fIdtmed->GetArray()-1599; Float_t par[24], cpar[5], cpar0[5], pcpar[12], tpar[3], tpar0[3]; Float_t dz; Int_t idrotm[1699]; #include "ABSOSHILConst.h" #include "ABSOConst.h" // // Structure of Tracking Region // Float_t dzFe = 25.; // 3 < theta < 9 fNLayers[0] = 5; fMLayers[0][0] = kAir; fZLayers[0][0] = kZAbsStart; fMLayers[0][1] = kC; fZLayers[0][1] = kZAbsCc; fMLayers[0][2] = kConcrete; fZLayers[0][2] = kZRear-kDRear-dzFe; fMLayers[0][3] = kSteel; fZLayers[0][3] = kZRear-kDRear; fMLayers[0][4] = kSteel; fZLayers[0][4] = kZRear; // 2 < theta < 3 fNLayers[1] = 6; fMLayers[1][0] = kAir ; fZLayers[1][0] = fZLayers[0][0]-10.; fMLayers[1][1] = kAl ; fZLayers[1][1] = fZLayers[0][0]; fMLayers[1][2] = fMLayers[0][1]; fZLayers[1][2] = fZLayers[0][1]; fMLayers[1][3] = fMLayers[0][2]; fZLayers[1][3] = fZLayers[0][2]; fMLayers[1][4] = fMLayers[0][3]; fZLayers[1][4] = fZLayers[0][3]; fMLayers[1][5] = kNiCuW; fZLayers[1][5] = fZLayers[0][4]; // Float_t dTube=0.1; // tube thickness Float_t dInsu=0.5; // insulation thickness Float_t dEnve=0.1; // protective envelope thickness // Float_t dFree=0.5; // clearance thickness // Mother volume and outer shielding: Pb par[0] = 0.; par[1] = 360.; par[2] = 7.; par[3] = -(kZRear-kZAbsStart)/2.; par[4] = kRAbs; par[5] = kZAbsStart * TMath::Tan(kTheta1); par[6] = par[3]+(kZNose-kZAbsStart); par[7] = kRAbs; par[8] = kZNose * TMath::Tan(kTheta1); par[9] = par[3]+(kZConeTPC-kZAbsStart); par[10] = kRAbs; par[11] = par[8] + (par[9] - par[6]) * TMath::Tan(kTheta2); par[12] = par[3]+(kZOpen-kZAbsStart); par[13] = kRAbs; par[14] = par[11] + (par[12] - par[9]) * TMath::Tan(kAccMax); par[15] = par[3]+(kZRear-kDRear-kZAbsStart); par[16] = kRAbs + (par[15] - par[12]) * TMath::Tan(kThetaOpen1) ; par[17] = par[14] + (par[15] - par[12]) * TMath::Tan(kAccMax); par[18] = par[3]+(kZRear-kDRear-kZAbsStart); par[19] = (kZRear-kDRear) * TMath::Tan(kAccMin); par[20] = par[14] + (par[18] - par[12]) * TMath::Tan(kAccMax); par[21] = -par[3]; par[22] = kZRear* TMath::Tan(kAccMin); par[23] = par[20] + (par[21] - par[18]) * TMath::Tan(kAccMax); gMC->Gsvolu("ABSS", "PCON", idtmed[kPb], par, 24); { // Begin local scope for i for (Int_t i=4; i<18; i+=3) par[i] = 0; } // End local scope for i gMC->Gsvolu("ABSM", "PCON", idtmed[kVacuum+40], par, 24); gMC->Gspos("ABSS", 1, "ABSM", 0., 0., 0., 0, "ONLY"); // // Steel envelope // par[4] = par[5] -kDSteel; par[7] = par[8] -kDSteel; par[10]= par[11]-kDSteel; par[13]= par[14]-kDSteel; par[16]= par[17]-kDSteel; par[19]= par[20]-kDSteel; par[22]= par[23]-kDSteel; gMC->Gsvolu("ABST", "PCON", idtmed[kSteel], par, 24); gMC->Gspos("ABST", 1, "ABSS", 0., 0., 0., 0, "ONLY"); // // Polyethylene shield // cpar[0] = (kZRear - kZConeTPC) / 2.; cpar[1] = kZConeTPC * TMath::Tan(kAccMax); cpar[2] = cpar[1] + kDPoly; cpar[3] = kZRear * TMath::Tan(kAccMax); cpar[4] = cpar[3] + kDPoly; gMC->Gsvolu("APOL", "CONE", idtmed[kPolyCH2+40], cpar, 5); dz = (kZRear-kZAbsStart)/2.-cpar[0]; gMC->Gspos("APOL", 1, "ABSS", 0., 0., dz, 0, "ONLY"); // // Tungsten nose to protect TPC // cpar[0] = (kZNose - kZAbsStart) / 2.; cpar[1] = kZAbsStart * TMath::Tan(kAccMax); cpar[2] = kZAbsStart * TMath::Tan(kTheta1)-kDSteel; cpar[3] = kZNose * TMath::Tan(kAccMax); cpar[4] = kZNose * TMath::Tan(kTheta1)-kDSteel; gMC->Gsvolu("ANOS", "CONE", idtmed[kW], cpar, 5); // dz = -(kZRear-kZAbsStart)/2.+cpar[0]; gMC->Gspos("ANOS", 1, "ABSS", 0., 0., dz, 0, "ONLY"); // // Tungsten inner shield // Float_t zW = kZTwoDeg+.1; Float_t dZ = zW+(kZRear-kDRear-zW)/2.; // pcpar[0] = 0.; pcpar[1] = 360.; pcpar[2] = 3.; pcpar[3] = zW-dZ; pcpar[4] = kRAbs; pcpar[5] = zW * TMath::Tan(kAccMin); pcpar[6] = kZOpen-dZ; pcpar[7] = kRAbs; pcpar[8] = kZOpen * TMath::Tan(kAccMin); pcpar[9] = kZRear-kDRear-dZ; pcpar[10] = kRAbs+(kZRear-kDRear-kZOpen) * TMath::Tan(kThetaOpen1); pcpar[11] = (kZRear-kDRear) * TMath::Tan(kAccMin); gMC->Gsvolu("AWIN", "PCON", idtmed[kNiCuW+40], pcpar, 12); dz=(zW+kZRear-kDRear)/2-(kZAbsStart+kZRear)/2.; gMC->Gspos("AWIN", 1, "ABSS", 0., 0., dz, 0, "ONLY"); // // First part replaced by Carbon // cpar[0] = (200.-zW)/2.; cpar[1] = kRAbs; cpar[2] = pcpar[5]; cpar[3] = kRAbs; cpar[4] = 200. * TMath::Tan(kAccMin); gMC->Gsvolu("ACNO", "CONE", idtmed[kC], cpar, 5); dz = zW-dZ+cpar[0]; gMC->Gspos("ACNO", 1, "AWIN", 0., 0., dz, 0, "ONLY"); /* Float_t zWW = 383.5; cpar[0] = (kZRear-kDRear-zWW)/2.; cpar[1] = kRAbs + (zWW-kZOpen) * TMath::Tan(kThetaOpen1); cpar[2] = zWW * TMath::Tan(kAccMin); cpar[3] = pcpar[10]; cpar[4] = pcpar[11]; gMC->Gsvolu("AWNO", "CONE", idtmed[kCu+40], cpar, 5); dz = zWW-dZ+cpar[0]; gMC->Gspos("AWNO", 1, "AWIN", 0., 0., dz, 0, "ONLY"); */ // // Inner tracking region // // mother volume: Cu // // pcpar[0] = 0.; pcpar[1] = 360.; pcpar[2] = 3.; pcpar[3] = -(kZRear-kZAbsStart)/2.; pcpar[4] = kRAbs; pcpar[5] = kZAbsStart * TMath::Tan(kAccMax); pcpar[6] = pcpar[3]+(kZTwoDeg-kZAbsStart); pcpar[7] = kRAbs; pcpar[8] = kZTwoDeg * TMath::Tan(kAccMax); pcpar[9] = -pcpar[3]; pcpar[10] = kZRear * TMath::Tan(kAccMin); pcpar[11] = kZRear * TMath::Tan(kAccMax); gMC->Gsvolu("AITR", "PCON", idtmed[fMLayers[0][4]], pcpar, 12); // // special Pb medium for last 5 cm of Pb Float_t zr=kZRear-2.-0.001; cpar[0] = 1.0; cpar[1] = zr * TMath::Tan(kThetaR); cpar[2] = zr * TMath::Tan(kAccMax); cpar[3] = cpar[1] + TMath::Tan(kThetaR) * 2; cpar[4] = cpar[2] + TMath::Tan(kAccMax) * 2; gMC->Gsvolu("ARPB", "CONE", idtmed[fMLayers[0][4]], cpar, 5); dz=(kZRear-kZAbsStart)/2.-cpar[0]-0.001; gMC->Gspos("ARPB", 1, "AITR", 0., 0., dz, 0, "ONLY"); // // concrete cone: concrete // pcpar[9] = pcpar[3]+(kZRear-kDRear-kZAbsStart); pcpar[10] = (kZRear-kDRear) * TMath::Tan(kAccMin); pcpar[11] = (kZRear-kDRear) * TMath::Tan(kAccMax); gMC->Gsvolu("ACON", "PCON", idtmed[fMLayers[0][2]+40], pcpar, 12); gMC->Gspos("ACON", 1, "AITR", 0., 0., 0., 0, "ONLY"); // // Fe Cone // zr = kZRear-kDRear-dzFe; cpar[0] = dzFe/2.; cpar[1] = zr * TMath::Tan(kAccMin); cpar[2] = zr * TMath::Tan(kAccMax); cpar[3] = cpar[1] + TMath::Tan(kAccMin) * dzFe; cpar[4] = cpar[2] + TMath::Tan(kAccMax) * dzFe; gMC->Gsvolu("ACFE", "CONE",idtmed[fMLayers[0][3]], cpar, 5); dz = (kZRear-kZAbsStart)/2.-kDRear-dzFe/2.; gMC->Gspos("ACFE", 1, "ACON", 0., 0., dz, 0, "ONLY"); // // // carbon cone: carbon // pcpar[9] = pcpar[3]+(kZAbsCc-kZAbsStart); pcpar[10] = kZAbsCc * TMath::Tan(kAccMin); pcpar[11] = kZAbsCc * TMath::Tan(kAccMax); gMC->Gsvolu("ACAR", "PCON", idtmed[fMLayers[0][1]+40], pcpar, 12); gMC->Gspos("ACAR", 1, "ACON", 0., 0., 0., 0, "ONLY"); // // carbon cone outer region // cpar[0] = 10.; cpar[1] = kRAbs; cpar[2] = kZAbsStart* TMath::Tan(kAccMax); cpar[3] = kRAbs; cpar[4] = cpar[2]+2. * cpar[0] * TMath::Tan(kAccMax); gMC->Gsvolu("ACAO", "CONE", idtmed[fMLayers[0][1]], cpar, 5); dz=-(kZRear-kZAbsStart)/2.+cpar[0]; gMC->Gspos("ACAO", 1, "ACAR", 0., 0., dz, 0, "ONLY"); // // inner W shield Float_t epsi=0.; Float_t repsi=1.; zr=kZRear-(kDRear-epsi); cpar[0] = (kDRear-epsi)/2.; cpar[1] = zr * TMath::Tan(kAccMin); cpar[2] = zr * TMath::Tan(kThetaR*repsi); cpar[3] = cpar[1] + TMath::Tan(kAccMin) * (kDRear-epsi); cpar[4] = cpar[2] + TMath::Tan(kThetaR*repsi) * (kDRear-epsi); gMC->Gsvolu("ARW0", "CONE", idtmed[fMLayers[1][4]+40], cpar, 5); dz=(kZRear-kZAbsStart)/2.-cpar[0]; gMC->Gspos("ARW0", 1, "AITR", 0., 0., dz, 0, "ONLY"); // // special W medium for last 5 cm of W zr=kZRear-5; cpar[0] = 2.5; cpar[1] = zr * TMath::Tan(kAccMin); cpar[2] = zr * TMath::Tan(kThetaR*repsi); cpar[3] = cpar[1] + TMath::Tan(kAccMin) * 5.; cpar[4] = cpar[2] + TMath::Tan(kThetaR*repsi) * 5.; gMC->Gsvolu("ARW1", "CONE", idtmed[fMLayers[1][4]+20], cpar, 5); dz=(kDRear-epsi)/2.-cpar[0]; gMC->Gspos("ARW1", 1, "ARW0", 0., 0., dz, 0, "ONLY"); // // Cu Float_t drMin=TMath::Tan(kThetaR) * 5; Float_t drMax=TMath::Tan(kAccMax) * 5; gMC->Gsvolu("ARPE", "CONE", idtmed[fMLayers[0][4]], cpar, 0); cpar[0]=2.5; { // Begin local scope for i for (Int_t i=0; i<3; i++) { zr=kZRear-kDRear+5+i*10.; cpar[1] = zr * TMath::Tan(kThetaR); cpar[2] = zr * TMath::Tan(kAccMax); cpar[3] = cpar[1] + drMin; cpar[4] = cpar[2] + drMax; dz=(kZRear-kZAbsStart)/2.-cpar[0]-5.-(2-i)*10; gMC->Gsposp("ARPE", i+1, "AITR", 0., 0., dz, 0, "ONLY",cpar,5); } } // End local scope for i gMC->Gspos("AITR", 1, "ABSS", 0., 0., 0., 0, "ONLY"); dz = (kZRear-kZAbsStart)/2.+kZAbsStart; gMC->Gspos("ABSM", 1, "ALIC", 0., 0., dz, 0, "ONLY"); // // // vacuum system // // pipe and heating jackets // // // cylindrical piece tpar0[2]=(kZOpen-kZAbsStart)/2; tpar0[0]=kRVacu; tpar0[1]=kRVacu+dTube+dInsu+dEnve; gMC->Gsvolu("AV11", "TUBE", idtmed[kSteel+40], tpar0, 3); // // insulation tpar[2]=tpar0[2]; tpar[0]=kRVacu+dTube; tpar[1]=tpar[0]+dInsu; gMC->Gsvolu("AI11", "TUBE", idtmed[kInsulation+40], tpar, 3); gMC->Gspos("AI11", 1, "AV11", 0., 0., 0., 0, "ONLY"); // dz=-(kZRear-kZAbsStart)/2.+tpar0[2]; gMC->Gspos("AV11", 1, "ABSM", 0., 0., dz, 0, "ONLY"); // // conical piece cpar0[0]=(kZRear-kDRear-kZOpen)/2; cpar0[1]= kRVacu-0.05; cpar0[2]= kRVacu+dTube+dInsu+dEnve; Float_t dR=2.*cpar0[0]*TMath::Tan(kThetaOpen1); cpar0[3]=cpar0[1]+dR; cpar0[4]=cpar0[2]+dR; gMC->Gsvolu("AV21", "CONE", idtmed[kSteel+40], cpar0, 5); dTube+=0.05; // // insulation cpar[0]=cpar0[0]; cpar[1]=cpar0[1]+dTube; cpar[2]=cpar0[1]+dTube+dInsu; cpar[3]=cpar0[3]+dTube; cpar[4]=cpar0[3]+dTube+dInsu; gMC->Gsvolu("AI21", "CONE", idtmed[kInsulation+40], cpar, 5); gMC->Gspos("AI21", 1, "AV21", 0., 0., 0., 0, "ONLY"); dz=(kZRear-kZAbsStart)/2.-cpar0[0]-kDRear; gMC->Gspos("AV21", 1, "ABSM", 0., 0., dz, 0, "ONLY"); // // Support cone par[0] = 22.5; par[1] = 360.0; par[2] = 8.0; par[3] = 4.0; par[4] = kZRear; par[5] = 100.; par[6] = 180.; par[7] = kZRear+20.; par[8] = 100.; par[9] = 180.; par[10] = kZRear+20.; par[11] = 178.; par[12] = 180.; par[13] = 600.; par[14] = 178.; par[15] = 180.; gMC->Gsvolu("ASSS", "PGON", idtmed[kAl], par, 16); gMC->Gspos("ASSS", 1, "ALIC", 0., 0., 0., 0, "ONLY"); Float_t trap[11]; trap[ 0] = (530.-170.)/2.; trap[ 2] = 0.; trap[ 3] = 2.; trap[ 4] = (600.-(kZRear+2.))/2.;; trap[ 5] = trap[4]; trap[ 6] = 0.; trap[ 7] = 2.; trap[ 8] = 5.; trap[ 9] = 5.; trap[10] = 0.; trap[ 1] = -TMath::ATan((trap[4]-trap[8])/2./trap[0])*180./TMath::Pi(); AliMatrix(idrotm[1600], 180., 0., 90., 0., 90., 90.); AliMatrix(idrotm[1601], 180., 0., 90., 0., 90., 270.); gMC->Gsvolu("ASST", "TRAP", idtmed[kSteel], trap, 11); dz = (600.+kZRear+2.)/2.+(trap[4]-trap[8])/2.; // Float_t dy = 170.+trap[0]; // gMC->Gspos("ASST", 1, "ALIC", 0., dy, dz, idrotm[1600], "ONLY"); // gMC->Gspos("ASST", 2, "ALIC", 0., -dy, dz, idrotm[1601], "ONLY"); } //_____________________________________________________________________________ void AliABSOv0::Init() { // // Initialisation of the muon absorber after it has been built Int_t i; // if(fDebug) { printf("\n%s: ",ClassName()); for(i=0;i<35;i++) printf("*"); printf(" ABSOv0_INIT "); for(i=0;i<35;i++) printf("*"); printf("\n%s: ",ClassName()); // for(i=0;i<80;i++) printf("*"); printf("\n"); } }