///////////////////////////////////////////////////////////////////////////////
// //
// Transition Radiation Detector //
// This class contains the basic functions for the Transition Radiation //
// detector. Functions specific to one particular geometry are //
// contained in the derived classes //
// //
//Begin_Html
/*
*/
//End_Html
// //
// //
///////////////////////////////////////////////////////////////////////////////
#include
#include
#include
#include "AliTRD.h"
#include "AliRun.h"
#include "AliConst.h"
ClassImp(AliTRD)
//_____________________________________________________________________________
AliTRD::AliTRD()
{
//
// Default constructor
//
fIshunt = 0;
fGasMix = 0;
fSensSelect = 0;
fSensPlane = 0;
fSensChamber = 0;
fSensSector = 0;
}
//_____________________________________________________________________________
AliTRD::AliTRD(const char *name, const char *title)
: AliDetector(name,title)
{
//
// Standard constructor for the TRD
//
//
// Allocate the hit array
fHits = new TClonesArray("AliTRDhit", 405);
fIshunt = 0;
fGasMix = 0;
fSensSelect = 0;
fSensPlane = 0;
fSensChamber = 0;
fSensSector = 0;
SetMarkerColor(kWhite);
}
//_____________________________________________________________________________
void AliTRD::AddHit(Int_t track, Int_t *vol, Float_t *hits)
{
//
// Add a hit for the TRD
//
TClonesArray &lhits = *fHits;
new(lhits[fNhits++]) AliTRDhit(fIshunt,track,vol,hits);
}
//_____________________________________________________________________________
void AliTRD::BuildGeometry()
{
//
// Create the ROOT TNode geometry for the TRD
//
TNode *Node, *Top;
TPGON *pgon;
const Int_t kColorTRD = 46;
// Find the top node alice
Top=gAlice->GetGeometry()->GetNode("alice");
pgon = new TPGON("S_TRD","TRD","void",0,360,nsect,4);
Float_t ff = TMath::Cos(kDegrad * 180 / nsect);
Float_t rrmin = rmin / ff;
Float_t rrmax = rmax / ff;
pgon->DefineSection(0,-zmax1,rrmax,rrmax);
pgon->DefineSection(1,-zmax2,rrmin,rrmax);
pgon->DefineSection(2, zmax2,rrmin,rrmax);
pgon->DefineSection(3, zmax1,rrmax,rrmax);
Top->cd();
Node = new TNode("TRD","TRD","S_TRD",0,0,0,"");
Node->SetLineColor(kColorTRD);
fNodes->Add(Node);
}
//_____________________________________________________________________________
void AliTRD::CreateMaterials()
{
//
// Create the materials for the TRD
// Origin Y.Foka
//
AliMC* pMC = AliMC::GetMC();
Int_t ISXFLD = gAlice->Field()->Integ();
Float_t SXMGMX = gAlice->Field()->Max();
// For polyethilene (CH2)
Float_t ape[2] = { 12., 1. };
Float_t zpe[2] = { 6., 1. };
Float_t wpe[2] = { 1., 2. };
Float_t dpe = 0.95;
// For mylar (C5H4O2)
Float_t amy[3] = { 12., 1., 16. };
Float_t zmy[3] = { 6., 1., 8. };
Float_t wmy[3] = { 5., 4., 2. };
Float_t dmy = 1.39;
// For CO2
Float_t aco[2] = { 12., 16. };
Float_t zco[2] = { 6., 8. };
Float_t wco[2] = { 1., 2. };
Float_t dco = 0.001977;
// For water
Float_t awa[2] = { 1., 16. };
Float_t zwa[2] = { 1., 8. };
Float_t wwa[2] = { 2., 1. };
Float_t dwa = 1.0;
// For isobutane (C4H10)
Float_t ais[2] = { 12., 1. };
Float_t zis[2] = { 6., 1. };
Float_t wis[2] = { 4., 10. };
Float_t dis = 0.00267;
// For Xe/CO2-gas-mixture
// Xe-content of the Xe/CO2-mixture (90% / 10%)
Float_t fxc = .90;
// Xe-content of the Xe/Isobutane-mixture (97% / 3%)
Float_t fxi = .97;
Float_t dxe = .005858;
// General tracking parameter
Float_t tmaxfd = -10.;
Float_t stemax = -1e10;
Float_t deemax = -0.1;
Float_t epsil = 1e-4;
Float_t stmin = -0.001;
Float_t absl, radl, d, buf[1];
Float_t agm[2], dgm, zgm[2], wgm[2];
Int_t nbuf;
//////////////////////////////////////////////////////////////////////////
// Define Materials
//////////////////////////////////////////////////////////////////////////
AliMaterial( 1, "Al $", 26.98, 13.0, 2.7 , 8.9 , 37.2);
AliMaterial( 2, "Air$", 14.61, 7.3, 0.001205, 30420.0 , 67500.0);
AliMaterial( 4, "Xe $", 131.29, 54.0, dxe , 1447.59, 0.0);
AliMaterial( 5, "Cu $", 63.54, 29.0, 8.96 , 1.43, 14.8);
AliMaterial( 6, "C $", 12.01, 6.0, 2.265 , 18.8 , 74.4);
AliMaterial(12, "G10$", 20.00, 10.0, 1.7 , 19.4 , 999.0);
// Mixtures
AliMixture(3, "Polyethilene$", ape, zpe, dpe, -2, wpe);
AliMixture(7, "Mylar$", amy, zmy, dmy, -3, wmy);
AliMixture(8, "CO2$", aco, zco, dco, -2, wco);
AliMixture(9, "Isobutane$", ais, zis, dis, -2, wis);
AliMixture(13, "Water$" , awa, zwa, dwa, -2, wwa);
// Gas mixtures
char namate[21];
// Xe/CO2-mixture
// Get properties of Xe
pMC->Gfmate((*fIdmate)[4], namate, agm[0], zgm[0], d, radl, absl, buf, nbuf);
// Get properties of CO2
pMC->Gfmate((*fIdmate)[8], namate, agm[1], zgm[1], d, radl, absl, buf, nbuf);
// Create gas mixture
wgm[0] = fxc;
wgm[1] = 1. - fxc;
dgm = wgm[0] * dxe + wgm[1] * dco;
AliMixture(10, "Gas mixture 1$", agm, zgm, dgm, 2, wgm);
// Xe/Isobutane-mixture
// Get properties of Xe
pMC->Gfmate((*fIdmate)[4], namate, agm[0], zgm[0], d, radl, absl, buf, nbuf);
// Get properties of Isobutane
pMC->Gfmate((*fIdmate)[9], namate, agm[1], zgm[1], d, radl, absl, buf, nbuf);
// Create gas mixture
wgm[0] = fxi;
wgm[1] = 1. - fxi;
dgm = wgm[0] * dxe + wgm[1] * dis;
AliMixture(11, "Gas mixture 2$", agm, zgm, dgm, 2, wgm);
//////////////////////////////////////////////////////////////////////////
// Tracking Media Parameters
//////////////////////////////////////////////////////////////////////////
// Al Frame
AliMedium(1301, "Al Frame$", 1, 0, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
// Air
AliMedium(1302, "Air$", 2, 0, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
// Polyethilene
AliMedium(1303, "Radiator$", 3, 0, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
// Xe
AliMedium(1304, "Xe$", 4, 1, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
// Cu pads
AliMedium(1305, "Padplane$", 5, 1, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
// Fee + cables
AliMedium(1306, "Readout$", 1, 0, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
// C frame
AliMedium(1307, "C Frame$", 6, 0, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
// Mylar foils
AliMedium(1308, "Mylar$", 7, 0, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
if (fGasMix == 1) {
// Gas-mixture (Xe/CO2)
AliMedium(1309, "Gas-mix$", 10, 1, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
}
else {
// Gas-mixture (Xe/Isobutane)
AliMedium(1309, "Gas-mix$", 11, 1, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
}
// Nomex-honeycomb (use carbon for the time being)
AliMedium(1310, "Nomex$", 6, 0, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
// Kapton foils (use Mylar for the time being)
AliMedium(1311, "Kapton$", 7, 0, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
// Gas-filling of the radiator
AliMedium(1312, "CO2$", 8, 0, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
// G10-plates
AliMedium(1313, "G10-plates$",12, 0, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
// Cooling water
AliMedium(1314, "Water$", 13, 0, ISXFLD, SXMGMX
, tmaxfd, stemax, deemax, epsil, stmin);
}
//_____________________________________________________________________________
Int_t AliTRD::DistancetoPrimitive(Int_t , Int_t )
{
//
// Distance between the mouse and the TRD detector on the screen
// Dummy routine
//
return 9999;
}
//_____________________________________________________________________________
void AliTRD::Init()
{
//
// Initialise the TRD detector after the geometry has been created
//
Int_t i;
//
printf("\n");
for(i=0;i<35;i++) printf("*");
printf(" TRD_INIT ");
for(i=0;i<35;i++) printf("*");
printf("\n");
// Here the TRD initialisation code (if any!)
if (fGasMix == 1)
printf(" Gas Mixture: 90%% Xe + 10%% CO2\n");
else
printf(" Gas Mixture: 97%% Xe + 3%% Isobutane\n");
if (fSensPlane)
printf(" Only plane %d is sensitive\n",fSensPlane);
if (fSensChamber)
printf(" Only chamber %d is sensitive\n",fSensChamber);
if (fSensSector)
printf(" Only sector %d is sensitive\n",fSensSector);
for(i=0;i<80;i++) printf("*");
printf("\n");
}
//_____________________________________________________________________________
void AliTRD::SetGasMix(Int_t imix)
{
if ((imix < 0) || (imix > 1)) {
printf("Wrong input value: %d\n",imix);
printf("Use standard setting\n");
fGasMix = 0;
return;
}
fGasMix = imix;
}
//_____________________________________________________________________________
void AliTRD::SetSensPlane(Int_t iplane)
{
if ((iplane < 0) || (iplane > 6)) {
printf("Wrong input value: %d\n",iplane);
printf("Use standard setting\n");
fSensPlane = 0;
fSensSelect = 0;
return;
}
fSensSelect = 1;
fSensPlane = iplane;
}
//_____________________________________________________________________________
void AliTRD::SetSensChamber(Int_t ichamber)
{
if ((ichamber < 0) || (ichamber > 5)) {
printf("Wrong input value: %d\n",ichamber);
printf("Use standard setting\n");
fSensChamber = 0;
fSensSelect = 0;
return;
}
fSensSelect = 1;
fSensChamber = ichamber;
}
//_____________________________________________________________________________
void AliTRD::SetSensSector(Int_t isector)
{
if ((isector < 0) || (isector > 18)) {
printf("Wrong input value: %d\n",isector);
printf("Use standard setting\n");
fSensSector = 0;
fSensSelect = 0;
return;
}
fSensSelect = 1;
fSensSector = isector;
}
ClassImp(AliTRDhit)
//_____________________________________________________________________________
AliTRDhit::AliTRDhit(Int_t shunt, Int_t track, Int_t *vol, Float_t *hits):
AliHit(shunt, track)
{
//
// Create a TRD hit
//
//
// Store volume hierarchy
fSector = vol[0];
fChamber = vol[1];
fPlane = vol[2];
//
// Store position and charge
fX = hits[0];
fY = hits[1];
fZ = hits[2];
fQ = hits[3];
}