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[u/mrichter/AliRoot.git] / EMCAL / AliEMCALv0.cxx

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 * Author: The ALICE Off-line Project.                                    *

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 * documentation strictly for non-commercial purposes is hereby granted   *

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 * about the suitability of this software for any purpose. It is          *

 * provided "as is" without express or implied warranty.                  *

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/* $Id$ */



//_________________________________________________________________________

// Implementation version v0 of EMCAL Manager class 

// An object of this class does not produce hits nor digits

// It is the one to use if you do not want to produce outputs in TREEH or TREED

// This class places a Geometry of the EMCAL in the ALICE Detector as defined in AliEMCALGeometry.cxx                 

//*-- Author: Yves Schutz (SUBATECH)

//*-- and   : Sahal Yacoob (LBL / UCT)



// This Version of AliEMCALv0 reduces the number of volumes placed in XEN1 (the envelope) to less than five hundred

// The Envelope is Placed in Alice, And the Aluminium layer. Mini envelopes (XU) are then placed in XEN1.

// Each mini envelope contains 2 scintillator, and 2 lead layers, except the last one which contains just one scintillator layer.

// At the moment I cannot place the 36 and above layers in the mini envelopes so all layers are still placed in XEN1





// --- ROOT system ---

#include "TPGON.h"

#include "TTUBS.h"

#include "TNode.h"

#include "TRandom.h"

#include "TGeometry.h"

//#include "Tstring.h"



// --- Standard library ---



#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <strstream.h>

#include <iostream.h>



// --- AliRoot header files ---



#include "AliEMCALv0.h"

#include "AliEMCALGeometry.h"

#include "AliConst.h"

#include "AliRun.h"

#include "AliMC.h"



ClassImp(AliEMCALv0)



//______________________________________________________________________

AliEMCALv0::AliEMCALv0(const char *name, const char *title):

    AliEMCAL(name,title){

    // Standard Constructor



    if (strcmp(GetTitle(),"") != 0 )

	fGeom =  AliEMCALGeometry::GetInstance(GetTitle(), "") ;



}

//______________________________________________________________________

void AliEMCALv0::BuildGeometry(){

    // Display Geometry for display.C



    const Int_t kColorArm1   = kBlue ;



    // Difine the shape of the Calorimeter 

  

    new TTUBS("Envelop1", "Tubs that contains arm 1", "void", 

	      fGeom->GetEnvelop(0),     // rmin 

	      fGeom->GetEnvelop(1) +30 ,     // rmax

	      fGeom->GetEnvelop(2)/2.0, // half length in Z

	      fGeom->GetArm1PhiMin(),   // minimun phi angle

	      fGeom->GetArm1PhiMax()    // maximun phi angle

	);

    // Place the Node

    TNode * envelop1node = new TNode("Envelop1", "Arm1 Envelop", "Envelop1") ;

    envelop1node->SetLineColor(kColorArm1) ;

    fNodes->Add(envelop1node) ;

}

//______________________________________________________________________

void AliEMCALv0::CreateGeometry(){

    // Create the EMCAL geometry for Geant

    Float_t etamin,etamax;



    if(!(fGeom->IsInitialized())){

	Error("CreateGeometry","EMCAL Geometry class has not been set up.");

    } // end if

    // 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] = fGeom->GetEnvelop(0);     // rmin

    envelopA[1] = fGeom->GetEnvelop(1);     // rmax

    envelopA[2] = fGeom->GetEnvelop(2)/2.0; // dz

    envelopA[3] = fGeom->GetArm1PhiMin();   // minimun phi angle

    envelopA[4] = fGeom->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";



    //rmin Start mini envelopes after the aluminium layer

    envelopA[0] = fGeom->GetEnvelop(0) + fGeom->GetGap2Active() + 

	          fGeom->GetAlFrontThickness();

    //rmax larger for first two layers (preshower);

    Float_t tseg = fGeom->GetPreSintThick()+fGeom->GetPbRadThick();

    envelopA[1] = envelopA[0] + 2.0*tseg;

    envelopA[2] = fGeom->GetEnvelop(2)/2.0; // dz

    envelopA[3] = fGeom->GetArm1PhiMin();   // minimun phi angle

    envelopA[4] = fGeom->GetArm1PhiMax();   // maximun phi angle

    //filled with air

    gMC->Gsvolu(label.Data(), "TUBS ", idtmed[1599], envelopA, 5);

    // Place XU0 in to XEN1

    gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY");



    tseg = fGeom->GetFullSintThick()+fGeom->GetPbRadThick();

    for (int i = 1; i < ((fGeom->GetNLayers()-1)/2) + 1 ; i++ ){

	label = "XU" ;

	label += i ;

	envelopA[0] = envelopA[1]; //rmin

	envelopA[1] = envelopA[0] + 2.0*tseg;  //rmax

	 //filled with air

	gMC->Gsvolu(label.Data(), "TUBS ", idtmed[1599], envelopA, 5);

	gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;

    } // end  i



    // Create the shapes of active material (LEAD/Aluminium/Scintillator)

    // to be placed

    Float_t envelopB[10]; // First Layer of Aluminium

    Float_t envelopC[10]; // Scintillator Layers

    Float_t envelopD[10]; // Lead Layers

    //starting position in Phi

    envelopC[0] = envelopD[0] =  envelopB[0] = fGeom->GetArm1PhiMin();

    // Angular size of the Detector in Phi

    envelopB[1] = fGeom->GetArm1PhiMax() - fGeom->GetArm1PhiMin();

    envelopC[1] = envelopD[1] = envelopB[1];

    // Number of Section in Phi

    envelopC[2] = envelopD[2] = envelopB[2] = fGeom->GetNPhi();

    // each section will be passed 2 z coordinates    

    envelopD[3] = envelopC[3] = envelopB[3] = 2;

    envelopB[4] = fGeom->ZFromEtaR(fGeom->GetEnvelop(0)+fGeom->GetGap2Active(),

				   fGeom->GetArm1EtaMin());// z co-ordinate 1

    envelopB[5] = fGeom->GetEnvelop(0) + fGeom->GetGap2Active(); //rmin at z1

    envelopB[6] = envelopB[5] + fGeom->GetAlFrontThickness();//rmax at z1

    envelopD[6] = envelopB[6];

    envelopB[7] =fGeom->ZFromEtaR(fGeom->GetEnvelop(0)+fGeom->GetGap2Active(),

				  fGeom->GetArm1EtaMax()); // z co-ordinate 2

    envelopB[8] = envelopB[5] ; //

    envelopB[9] = envelopB[6] ; // radii are the same.



    // filled shapes wit hactive 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], 0, 0);

    gMC->Gsvolu("XPBX", "PGON", idtmed[1600], 0, 0);//  as will the lead layers

    //  Dividind eta polystyrene divisions into phi segments.

    gMC->Gsdvn("XPHI", "XPST", fGeom->GetNPhi(), 2);

    // Position Aluminium Layer in the Envelope 

    gMC->Gspos("XALU", 1, "XEN1", 0.0, 0.0, 0.0 , idrotm, "ONLY") ;



    // The loop below places the scintillator in Lead Layers alternately.

    for (int i = 0; i < fGeom->GetNLayers() ; i++ ){

	label = "XU" ;

        label += (int) i/2  ; // we will place two layers (i = one layer) in each mini envelope)	

        envelopC[5] = envelopD[6] ; //rmin

	envelopC[6] = envelopD[6] + ((i > 1)  ? fGeom->GetFullSintThick() : 

				     fGeom->GetPreSintThick());//rmax larger for first two layers (preshower)

	envelopC[8] = envelopD[6] ; //rmin

	envelopC[9] = envelopD[6] + ((i > 1 ) ? fGeom->GetFullSintThick() :

				     fGeom->GetPreSintThick());//rmax larger for first two layers (preshower)

	for (int j =0; j < (fGeom->GetNEta()) ; j++){

	    etamin = fGeom->GetArm1EtaMin()+

		(j*fGeom->GetDeltaEta());

	    etamax = fGeom->GetArm1EtaMin()+

		((j+1)*fGeom->GetDeltaEta());

	    envelopC[4] = fGeom->ZFromEtaR(envelopD[6],etamin); //z begin  

	    envelopC[7] = fGeom->ZFromEtaR(envelopD[6],etamax);// z end 

	    gMC->Gsposp("XPST",1+j+i*(fGeom->GetNEta()), label.Data(), // should be used but there's a weird crash above i = 18, 

			0.0, 0.0, 0.0 , idrotm, "ONLY", envelopC, 10); // Position and define layer

	} // end for j

	if (i < (fGeom->GetNLayers()-1)){

	    envelopD[5] = envelopC[6] ; //rmin

	    envelopD[6] = envelopC[6] + fGeom->GetPbRadThick();  //rmax

	    envelopD[8] = envelopC[6] ; //rmin

	    envelopD[9] = envelopC[6] + fGeom->GetPbRadThick();  //rmax

	    for (int j =0; j < (fGeom->GetNEta()) ; j++){

		etamin = fGeom->GetArm1EtaMin()+

		    (j*fGeom->GetDeltaEta());

		etamax = fGeom->GetArm1EtaMin()+

		    ((j+1)*fGeom->GetDeltaEta());

		envelopD[4] = fGeom->ZFromEtaR(envelopC[6],etamin);//z begin  

		envelopD[7] = fGeom->ZFromEtaR(envelopC[6],etamax);// z end

		// Position and Define Layer

		gMC->Gsposp("XPBX",1+ j+i*(fGeom->GetNEta()), label.Data(), 

			    0.0, 0.0, 0.0 , idrotm, "ONLY", envelopD, 10);

	    } // end for j

	} // end if i

    }  // for i

}

//______________________________________________________________________

void AliEMCALv0::Init(void){

    // Just prints an information message

    Int_t i;



    cout << endl;

    for(i=0;i<35;i++) cout <<"*";

    cout << " EMCAL_INIT ";

    for(i=0;i<35;i++) cout << "*";

    cout << endl;



    // Here the EMCAL initialisation code (if any!)



    if (fGeom!=0)  

	cout << "AliEMCAL" << Version() << " : EMCAL geometry intialized for "

	     << fGeom->GetName() << endl ;

    else

	cout << "AliEMCAL" << Version() << 

	    " : EMCAL geometry initialization failed !" << endl ;

    for(i=0;i<80;i++) printf("*");

    cout << endl;

}