// (V-zero) detector version 2 as designed by the Lyon group //
// All comments should be sent to Brigitte CHEYNIS : //
// b.cheynis@ipnl.in2p3.fr //
-// Geometry of the 4th of november 2002 //
+// Geometry of the 26th of november 2003 //
// (circular instead of trapezoidal shapes as in previous versions //
-// plus changes in cell dimensions and offsets) //
-// New coordinate system implemented in october 2003 //
+// plus changes in cell dimensions and offsets) : //
+// Scintillating cells are now 2 cm thick instead of 0.7 cm //
+// V0R sits between Z values -89.4 and -85.0 cm //
+// V0L sits between Z values +350.0 and +352.0 cm //
+// New coordinate system has been implemented in october 2003 //
// //
//////////////////////////////////////////////////////////////////////
#include <TParticle.h>
// --- AliRoot header files ---
+#include "AliRun.h"
+#include "AliMC.h"
#include "AliConst.h"
#include "AliMagF.h"
#include "AliVZEROLoader.h"
#include "AliVZEROdigit.h"
#include "AliVZEROhit.h"
#include "AliVZEROv2.h"
-#include "AliMC.h"
ClassImp(AliVZEROv2)
-//--------------------------------------------------------------------
+//_____________________________________________________________________________
AliVZEROv2:: AliVZEROv2():AliVZERO()
{
// Standard default constructor
}
-//--------------------------------------------------------------------
+
+//_____________________________________________________________________________
AliVZEROv2::AliVZEROv2(const char *name, const char *title):
AliVZERO(name,title)
{
}
-//-------------------------------------------------------------------------
+//_____________________________________________________________________________
void AliVZEROv2::CreateGeometry()
{
Float_t r0, r5;
Float_t pi = TMath::Pi();
- height1 = 1.82; // height of cell 1, in cm
- height2 = 3.81; // height of cell 2, in cm
- height3 = 4.72; // height of cell 3, in cm
- height4 = 7.12; // height of cell 4, in cm
- height5 = 10.83; // height of cell 5, in cm
+ height1 = 1.82; // height of cell 1, in cm
+ height2 = 3.81; // height of cell 2, in cm
+ height3 = 4.72; // height of cell 3, in cm
+ height4 = 7.12; // height of cell 4, in cm
+ height5 = 10.83; // height of cell 5, in cm
- theta = pi/6.0/2.0; // half angular opening = 15 degrees
-
- halfThickQua = fThickness1/2.0; // half thickness of elementary cell (inner ring)
+ theta = pi/6.0/2.0; // half angular opening = 15 degrees
- zdet = 90.0 - 0.6 -fThickness/2.0; // distance to vertex (along Z axis)
- r0 = 4.05; // closest distance to center of the beam pipe
- height = height1 + height2 + height3 + height4 + height5;
- r5 = r0 + height;
+ halfThickQua= fThickness1/2.0; // half thickness of elementary cell (inner ring)
+
+// distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
+// absorber nose sitting at 90 cm. Will use -zdet later...
+
+ zdet = 90.0 - 0.6 -fThickness/2.0; // distance to vertex (along Z axis)
+ r0 = 4.05; // closest distance to center of the beam pipe
+ height = height1 + height2 + height3 + height4 + height5;
+ r5 = r0 + height;
// Creation of mother volume v0LE - left part - :
// Entrance face at +350.0 cm (new coordinate system) ...
gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
-// Creation of carbon lids (3 mm thick) to keep v0RI box shut...
+// Creation of carbon lids (2 mm thick) to keep v0RI box shut...
+
+ Float_t lidThickness = 0.2;
partube[0] = r0;
partube[1] = r5;
- partube[2] = +0.3/2.0;
+ partube[2] = +lidThickness/2.0;
gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5); // air volume
// Elementary cell of ring 1 :
-// (the cells will be shifted by 3 mm to output fibers)
+// (cells 2 and 3 will be shifted by 1 cm to output fibers)
- Float_t offsetFibers = 0.7;
- Float_t offset = fThickness/2.0 - 0.3 - fThickness1/2.0;
+ Float_t offsetFibers = 1.0;
+ Float_t offset = fThickness/2.0 - lidThickness - fThickness1/2.0;
Float_t r1 = r0 + height1;
partubs[0] = r0;
partubs[1] = r4;
gMC->Gsvolu("V0R4","TUBS",idtmed[3005],partubs,5); // scintillator volume
- gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 , -offset + 3.0 * offsetFibers, 0,"ONLY");
+ gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
// Elementary cells of ring 5 :
partubs[4] = 120.0-30.0;
gMC->Gsvolu("V0R5","TUBS",idtmed[3005],partubs,5); // scintillator volume
- gMC->Gspos("V0R5",1,"V0R0", 0.0, 0.0 , -offset + 4.0 * offsetFibers, 0,"ONLY");
+ gMC->Gspos("V0R5",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
partubs[3] = 120.0-30.0;
partubs[4] = 120.0-15.0;
gMC->Gsvolu("V0R6","TUBS",idtmed[3005],partubs,5); // scintillator volume
- gMC->Gspos("V0R6",1,"V0R0", 0.0, 0.0 , -offset + 4.0 * offsetFibers, 0,"ONLY");
+ gMC->Gspos("V0R6",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
Float_t phiDeg = 180./6.;
fNodes->Add(v0Rnode);
v0Rnode->SetVisibility(2);
-// Rondelles de carbone (epaisseur 3 mm) de maintien des cellules ...
+// Rondelles de carbone (epaisseur 2 mm) de maintien des cellules ...
+
+ Float_t lidThickness = 0.2;
partube[0] = r0;
partube[1] = r5;
- partube[2] = +0.3/2.0;
+ partube[2] = +lidThickness/2.0;
TTUBE *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
v0R0->SetNumberOfDivisions(ndiv);
Float_t r1 = r0 + height1;
- Float_t offset = fThickness/2.0 - 0.3 - fThickness1/2.0;
- Float_t offsetFibers = 0.7;
+ Float_t offset = fThickness/2.0 - lidThickness - fThickness1/2.0;
+ Float_t offsetFibers = 1.0;
partubs[0] = r0;
partubs[1] = r1;
sprintf(nameNode,"SUBDER%d",ndetR);
v0Rnode0->cd();
- v0Rnode4 = new TNode(nameNode,nameNode,v0R4,0.0,0.0, -offset + 3.0*offsetFibers,0);
+ v0Rnode4 = new TNode(nameNode,nameNode,v0R4,0.0,0.0, -offset + 2.0*offsetFibers,0);
v0Rnode4->SetLineColor(kColorVZERO);
fNodes->Add(v0Rnode4);
ndetR++;
sprintf(nameNode,"SUBDER%d",ndetR);
v0Rnode0->cd();
- v0Rnode5 = new TNode(nameNode,nameNode,v0R5,0.0,0.0, -offset + 4.0*offsetFibers,0);
+ v0Rnode5 = new TNode(nameNode,nameNode,v0R5,0.0,0.0, -offset + 2.0*offsetFibers,0);
v0Rnode5->SetLineColor(kColorVZERO);
fNodes->Add(v0Rnode5);
ndetR++;
sprintf(nameNode,"SUBDER%d",ndetR);
v0Rnode0->cd();
- v0Rnode6 = new TNode(nameNode,nameNode,v0R6,0.0,0.0, -offset + 4.0*offsetFibers,0);
+ v0Rnode6 = new TNode(nameNode,nameNode,v0R6,0.0,0.0, -offset + 2.0*offsetFibers,0);
v0Rnode6->SetLineColor(kColorVZERO);
fNodes->Add(v0Rnode6);
ndetR++;
v0L0->SetNumberOfDivisions(ndiv);
v0L0->SetLineColor(7);
- Float_t offset_left;
- offset_left = - fThickness1/2.0;
+ Float_t offsetLeft;
+ offsetLeft = - fThickness1/2.0;
Float_t r1Left = r0Left + height1Left;
sprintf(nameNode,"SUBDEL%d",ndetL);
v0Lnode->cd();
- v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offset_left + halfThickQua,mat920);
+ v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
v0Lnode0->SetLineColor(kColorVZERO);
fNodes->Add(v0Lnode0);
ndetL++;
}
-//------------------------------------------------------------------------
+//_____________________________________________________________________________
void AliVZEROv2::CreateMaterials()
{
// gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
// gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
-
-
+
}
-//---------------------------------------------------------------------
+
+//_____________________________________________________________________________
void AliVZEROv2::DrawModule()
{
}
-//-------------------------------------------------------------------
+//_____________________________________________________________________________
void AliVZEROv2::Init()
{
-// Initialises version 1 of the VZERO Detector
+// Initialises version 2 of the VZERO Detector
// Just prints an information message
printf(" VZERO version %d initialized \n",IsVersion());
}
-//-------------------------------------------------------------------
+//_____________________________________________________________________________
void AliVZEROv2::StepManager()
{
Float_t theta;
Float_t phi;
- Float_t kRaddeg = 180/TMath::Pi();
+ Float_t kRaddeg = 180.0/TMath::Pi();
Float_t ringNumber;
Int_t ipart;
tlength = 0.0;
eloss = 0.0;
-
}
}
new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
}
-//---------------------------------------------------------------------
+//_____________________________________________________________________________
void AliVZEROv2::AddDigits(Int_t *tracks, Int_t* digits)
{
new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
}
-//---------------------------------------------------------------------
+//_____________________________________________________________________________
void AliVZEROv2::MakeBranch(Option_t *option)
{
}
const char *cD = strstr(option,"D");
- //
+
if (fDigits && fLoader->TreeD() && cD) {
fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff