// Get pointer to the array containing media indices
Int_t *idtmed = fIdtmed->GetArray() - 1599 ;
- // Create an Envelope within which to place the Detector
- Float_t envelopA[5];
- envelopA[0] = geom->GetEnvelop(0); // rmin
- envelopA[1] = geom->GetEnvelop(1); // rmax
- envelopA[2] = geom->GetEnvelop(2)/2.0; // dz
- envelopA[3] = geom->GetArm1PhiMin(); // minimun phi angle
- envelopA[4] = geom->GetArm1PhiMax(); // maximun phi angle
-
- // create XEN1
- gMC->Gsvolu("XEN1", "TUBS ", idtmed[1599], envelopA, 5) ; //filled with air
Int_t idrotm = 1;
AliMatrix(idrotm, 90.0, 0., 90.0, 90.0, 0.0, 0.0) ;
- // Position the EMCAL Mother Volume in Alice
- gMC->Gspos("XEN1", 1, "ALIC", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
- //
- TString label = "XU0";
+ // Create the EMCAL Mother Volume (a polygone) within which to place the Detector and named XEN1
+
+ Float_t envelopA[10];
+ envelopA[0] = geom->GetArm1PhiMin(); // minimum phi angle
+ envelopA[1] = geom->GetArm1PhiMax() - geom->GetArm1PhiMin(); // angular range in phi
+ envelopA[2] = geom->GetNPhi(); // number of sections in phi
+ envelopA[3] = 2; // 2 z coordinates
+ envelopA[4] = geom->ZFromEtaR(geom->GetEnvelop(0),
+ geom->GetArm1EtaMin()); // z coordinate 1
+ envelopA[5] = geom->GetEnvelop(0) ; // rmin at z1
+ envelopA[6] = geom->GetEnvelop(1) ; // rmax at z1
+ envelopA[7] = geom->ZFromEtaR(geom->GetEnvelop(0),
+ geom->GetArm1EtaMax()); // z coordinate 2
+ envelopA[8] = envelopA[5] ; // radii are the same.
+ envelopA[9] = envelopA[6] ; // radii are the same.
+
+ gMC->Gsvolu("XEN1", "PGON ", idtmed[1599], envelopA, 10) ; // Polygone filled with air
- //rmin Start mini envelopes after the aluminium layer
- envelopA[0] = geom->GetEnvelop(0) + geom->GetGap2Active() +
- geom->GetAlFrontThickness();
+ // Position the EMCAL Mother Volume (XEN1) in Alice (ALIC)
- //rmax larger for first two layers (preshower);
- Float_t tseg = geom->GetPreSintThick()+geom->GetPbRadThick();
- envelopA[1] = envelopA[0] + 2.0*tseg;
- envelopA[2] = geom->GetEnvelop(2)/2.0; // dz
- envelopA[3] = geom->GetArm1PhiMin(); // minimun phi angle
- envelopA[4] = geom->GetArm1PhiMax(); // maximun phi angle
+ gMC->Gspos("XEN1", 1, "ALIC", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
+
+ if (fDebug)
+ Info("CreateGeometry","rXEN1 = %f, %f\n", envelopA[5], envelopA[6]);
- //filled with air
- gMC->Gsvolu(label.Data(), "TUBS ", idtmed[1599], envelopA, 5);
+ // Create mini-envelopes which will contain the PreShower scintillator-Lead-scintillator-lead (XU0)
+
+ TString label = "XU0";
- // Place XU0 in to XEN1
+ envelopA[5] = envelopA[5] + geom->GetGap2Active()
+ + geom->GetAlFrontThickness(); // rmin at z1
+ envelopA[4] = geom->ZFromEtaR(envelopA[5],
+ geom->GetArm1EtaMin()); // z coordinate 1
+ envelopA[7] = geom->ZFromEtaR(envelopA[5],
+ geom->GetArm1EtaMax()); // z coordinate 2
+ envelopA[6] = envelopA[5] + 2 * (geom->GetPreSintThick()
+ + geom->GetPbRadThick() ); // rmax at z1
+ envelopA[8] = envelopA[5] ; // radii are the same.
+ envelopA[9] = envelopA[6] ; // radii are the same.
+
+ gMC->Gsvolu(label.Data(), "PGON", idtmed[1599], envelopA, 10);// Polygone filled with air
+
+ // Position XU0 in XEN1
+
gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY");
- tseg = geom->GetFullSintThick()+geom->GetPbRadThick();
+ if (fDebug)
+ Info("CreateGeometry","rXU0 = %f, %f\n", envelopA[5], envelopA[6]);
+
+ // Create mini-envelopes which will contain the Tower scintillator-Lead-scintillator-lead (XU1 -> XU9)
+
+ Float_t tseg = geom->GetFullSintThick()+geom->GetPbRadThick(); // thickness of scintillator+Pb
+
Int_t i ;
for (i = 1; i < ((geom->GetNLayers()-2)/2) + 1 ; i++ ){
label = "XU" ;
label += i ;
- envelopA[0] = envelopA[1]; //rmin
- envelopA[1] = envelopA[0] + 2.0*tseg; //rmax
+ envelopA[5] = envelopA[6] ; // rmin at z1
+ envelopA[4] = geom->ZFromEtaR(envelopA[5],
+ geom->GetArm1EtaMin()); // z coordinate 1
+ envelopA[7] = geom->ZFromEtaR(envelopA[5],
+ geom->GetArm1EtaMax()); // z coordinate 2
+ envelopA[6] = envelopA[5] + 2 * tseg ; // rmax at z1
+ envelopA[8] = envelopA[5] ; // radii are the same.
+ envelopA[9] = envelopA[6] ; // radii are the same.
+
+ gMC->Gsvolu(label.Data(), "PGON", idtmed[1599], envelopA, 10);// Polygone filled with air
- //filled with air
- gMC->Gsvolu(label.Data(), "TUBS ", idtmed[1599], envelopA, 5);
+ // Position XUi in XEN1
+
gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
+
+ if (fDebug)
+ Info("CreateGeometry","rXEN%d = %f, %f\n", i, envelopA[5], envelopA[6]);
+
} // end i
+
+ // Create one mini-envelope which will contain the last Tower scintillator (XU(nlayers-1)/2)
+
tseg = geom->GetFullSintThick() ;
label = "XU" ;
label += i ;
- envelopA[0] = envelopA[1]; //rmin
- envelopA[1] = envelopA[0] + tseg; //rmax
-
- //filled with air
- gMC->Gsvolu(label.Data(), "TUBS ", idtmed[1599], envelopA, 5);
+ envelopA[5] = envelopA[6] ; // rmin at z1
+ envelopA[4] = geom->ZFromEtaR(envelopA[5],
+ geom->GetArm1EtaMin()); // z coordinate 1
+ envelopA[7] = geom->ZFromEtaR(envelopA[5],
+ geom->GetArm1EtaMax()); // z coordinate 2
+ envelopA[6] = envelopA[5] + tseg ; // rmax at z1
+ envelopA[8] = envelopA[5] ; // radii are the same.
+ envelopA[9] = envelopA[6] ; // radii are the same.
+
+ gMC->Gsvolu(label.Data(), "PGON", idtmed[1599], envelopA, 10); // Polygone filled with air
+
+ // Position XU10 in XEN1
+
gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
+ Info("CreateGeometry","rXEN%d = %f, %f\n", i, envelopA[5], envelopA[6]);
// Create the shapes of active material (LEAD/Aluminium/Scintillator)
// to be placed
Float_t envelopC[10]; // Scintillator Layers
Float_t envelopD[10]; // Lead Layers
- //starting position in Phi
- envelopC[0] = envelopD[0] = envelopB[0] = geom->GetArm1PhiMin();
-
- // Angular size of the Detector in Phi
- envelopB[1] = geom->GetArm1PhiMax() - geom->GetArm1PhiMin();
- envelopC[1] = envelopD[1] = envelopB[1];
-
- // Number of Section in Phi
- envelopC[2] = envelopD[2] = envelopB[2] = geom->GetNPhi();
+ envelopC[0] = envelopD[0] = envelopB[0] = envelopA[0] ; // starting position in Phi
+ envelopC[1] = envelopD[1] = envelopB[1] = envelopA[1] ; // angular range in phi
+ envelopC[2] = envelopD[2] = envelopB[2] = envelopA[2] ; // number of sections in Phi
+ envelopD[3] = envelopC[3] = envelopB[3] = envelopA[3] ; // 2 z coordinates
- // each section will be passed 2 z coordinates
- envelopD[3] = envelopC[3] = envelopB[3] = 2;
envelopB[4] = geom->ZFromEtaR(geom->GetEnvelop(0),
- geom->GetArm1EtaMin());// z co-ordinate 1
- envelopB[5] = geom->GetEnvelop(0) ; //rmin at z1
- envelopB[6] = envelopB[5] + geom->GetAlFrontThickness();//rmax at z1
+ geom->GetArm1EtaMin()); // z co-ordinate 1
+ envelopB[5] = geom->GetEnvelop(0) ; // rmin at z1
+ envelopB[6] = envelopB[5] + geom->GetAlFrontThickness();// rmax at z1
envelopB[7] = geom->ZFromEtaR(geom->GetEnvelop(0),
- geom->GetArm1EtaMax()); // z co-ordinate 2
- envelopB[8] = envelopB[5] ; //
- envelopB[9] = envelopB[6] ; // radii are the same.
+ geom->GetArm1EtaMax()); // z co-ordinate 2
+ envelopB[8] = envelopB[5] ; // radii are the same.
+ envelopB[9] = envelopB[6] ; // radii are the same.
- // filled shapes with active material
-
- // Define Aluminium volume completely
- gMC->Gsvolu("XALU", "PGON", idtmed[1602], envelopB, 10);
-
- // The polystyrene layers will be defined when placed
- gMC->Gsvolu("XPST", "PGON", idtmed[1601], dum, 0);
- gMC->Gsvolu("XPBX", "PGON", idtmed[1600], dum, 0);// as will the lead layers
+ // Define active volumes completely
+
+ gMC->Gsvolu("XALU", "PGON", idtmed[1602], envelopB, 10); // PGON filled with Al
+
+ gMC->Gspos("XALU", 1, "XEN1", 0.0, 0.0, 0.0 , idrotm, "ONLY") ; // Position Aluminium Layer in XEN1
- // Dividind eta polystyrene divisions into phi segments.
- gMC->Gsdvn("XPHI", "XPST", geom->GetNPhi(), 2);
+ gMC->Gsvolu("XPST", "PGON", idtmed[1601], dum, 0); // PGON filled with Scintillator (shape to be defined by GSPOSP)
+
+ gMC->Gsvolu("XPBX", "PGON", idtmed[1600], dum, 0); // PGON filled with Lead (shape to be defined by GSPOSP)
+
+ gMC->Gsdvn("XPHI", "XPST", geom->GetNPhi(), 2); // Divide eta section of scintillators into phi segments.
+
+ // Position alternatively scintillator and Lead Layers in XUi.
- // Position Aluminium Layer in the Envelope
- gMC->Gspos("XALU", 1, "XEN1", 0.0, 0.0, 0.0 , idrotm, "ONLY") ;
+ envelopD[6] = envelopB[6] + geom->GetGap2Active() ;// gap between Al layer and XU0
- // The loop below places the scintillator in Lead Layers alternately.
- envelopD[6] = envelopB[6] + geom->GetGap2Active() ;
for (int i = 0; i < geom->GetNLayers() ; i++ ){
label = "XU" ;
label += static_cast<Int_t> (i/2) ; // we will place two layers (i = one layer) in each mini envelope)
0.0, 0.0, 0.0 , idrotm, "ONLY", envelopC, 10); // Position and define layer
} // end for j
- if (i < (geom->GetNLayers()-1)){
+ if (i < (geom->GetNLayers()-1)){ // except for the last XU which contains only one scintillator layer
envelopD[5] = envelopC[6] ; //rmin
envelopD[6] = envelopC[6] + geom->GetPbRadThick(); //rmax
envelopD[8] = envelopC[6] ; //rmin