///////////////////////////////////////////////////////////////////////////////
// //
// Transition Radiation Detector version 1 -- detailed simulation //
// //
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// //
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#include
#include
#include
#include
#include
#include
#include "GParticle.h"
#include "AliTRDv1.h"
#include "AliRun.h"
#include "AliConst.h"
#include "AliMC.h"
ClassImp(AliTRDv1)
//_____________________________________________________________________________
AliTRDv1::AliTRDv1(const char *name, const char *title)
:AliTRD(name, title)
{
//
// Standard constructor for the Transition Radiation Detector version 1
//
fIdSens1 = fIdSens2 = fIdSens3 = 0;
}
//_____________________________________________________________________________
void AliTRDv1::CreateGeometry()
{
//
// Create the geometry for the Transition Radiation Detector version 1
// --- The coarse geometry of the TRD, that can be used for background
// studies. This version leaves the space in front of the PHOS and
// HMPID empty.
// -- Author : Nick van Eijndhoven (CERN) 24/09/90
//
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Float_t xpos, ypos, zpos, f;
Int_t idmat[5];
Float_t widma, theoc, widmi, tanzr;
Float_t par_ic[4], par_oc[11], phisec, par_mo[10], par_fr[4], par_su[10];
Int_t *idtmed = gAlice->Idtmed();
// --- Name Conventions :
// TRD --> Mother TRD volume (Air)
// UTRL(S) --> Long (short) subdetector-type (Al)
// UTSL(S) --> Sectors of a subdetector (Al)
// UTFI(O/S) --> Inner part of the detector frame (Air)
// UTCI(O/S) --> Frames of the inner and outer chambers (C)
// UTII(O/S) --> Inner part of the chambers (Air)
// UTMI(O/S) --> Modules in the chambers (Air)
// UT1I(O/S) --> Radiator layer (CO2)
// UT2I(O/S) --> Polyethylene layer (PE)
// UT3I(O/S) --> Mylar layer (Mylar)
// UT4I(O/S) --> Xe/C02 layer (Xe/C02)
// UT5I(O/S) --> Cu layer (pads/sensitive) (Cu)
// UT6I(O/S) --> Kapton layer (Kapton)
// UT7I(O/S) --> NOMEX layer (C)
// UT8I(O/S) --> Readout layer (Al)
// --- Contains geometry information
// --- Number of sectors in the full detector
// --- Number of modules in each sector
// --- z-Coordinates of the TRD-frame
// --- r-Coordinates of the TRD-frame
// --- Thickness of the aluminium of the support frame
// --- Thickness of the interior of the support frame
// --- Thickness of the carbon chamber frame
// --- Thickness and z-position of the PE-layer in the radiator
// --- Thickness and z-position of the radiator
// --- Thickness and z-position of the mylar-layer
// --- Thickness and z-position of the Xe/C02-layer
// --- Thickness and z-position of the Cu-layer (Pads)
// --- Thickness and z-position of the kapton-layer
// --- Thickness and z-position of the NOMEX-layer
// Simple C-layer for the time being
// --- Thickness and z-position of the readout-layer
// --- Parameter for the arrays
// --- Number of subdetector-types
//--- Number of sectors in the first subdetector-type (full theta coverage)
//--- Number of sectors in the second subdetector-type (with hole for PHOS)
//************************************************************************
// Definition of Volumes
//************************************************************************
const Int_t nsec1 = 5; //Number of sectors in the first subdetector-type
const Int_t nsec2 = 5; //Number of sectors in the second subdetector-type
AliMC* pMC = AliMC::GetMC();
phisec = 360./nsect; //The phi-angle of the sectors
widmi = rmin*TMath::Sin(kPI/nsect);
widma = rmax*TMath::Sin(kPI/nsect);
// --- Definition of the Mother volume for the TRD (Al)
par_mo[0] = 0.;
par_mo[1] = 360.;
par_mo[2] = nsect;
par_mo[3] = 2.;
par_mo[4] = -zmax1;
par_mo[5] = rmin;
par_mo[6] = rmax;
par_mo[7] = zmax1;
par_mo[8] = rmin;
par_mo[9] = rmax;
pMC->Gsvolu("TRD ", "PGON", idtmed[1301], par_mo, 10);
// --- Definition of the 1st subdetector-type (full theta-coverage) (Al)
par_su[0] = 120.;
par_su[1] = nsec1*phisec;
par_su[2] = nsec1;
par_su[3] = 2.;
par_su[4] = -zmax1;
par_su[5] = rmin;
par_su[6] = rmax;
par_su[7] = 0.;
par_su[8] = rmin;
par_su[9] = rmax;
pMC->Gsvolu("UTRL", "PGON", idtmed[1300], par_su, 10);
pMC->Gsdvn("UTSL", "UTRL", nsec1, 2);
// --- Definition of the 2nd subdetector-type (hole for PHOS)
par_su[0] = 220.;
par_su[1] = nsec2*phisec;
par_su[2] = nsec2;
par_su[3] = 2.;
par_su[4] = -zmax1;
par_su[5] = rmin;
par_su[6] = rmax;
par_su[7] = -zmax1/2;
par_su[8] = rmin;
par_su[9] = rmax;
pMC->Gsvolu("UTRS", "PGON", idtmed[1300], par_su, 10);
pMC->Gsdvn("UTSS", "UTRS", nsec2, 2);
// --- Definition of the inner part of the detector frame (Air)
par_fr[0] = widmi;
par_fr[1] = widma;
par_fr[2] = zmax1/4 - alfram2/2;
par_fr[3] = (rmax-rmin)/2;
pMC->Gsvolu("UTFI", "TRD1", idtmed[1301], par_fr, 4);
pMC->Gsvolu("UTFO", "TRD1", idtmed[1301], par_fr, 4);
pMC->Gsvolu("UTFS", "TRD1", idtmed[1301], par_fr, 4);
// --- Calculate the shape-parameter for the outer chambers
tanzr = (zmax1-zmax2)/(rmax-rmin);
theoc = -kRaddeg*TMath::ATan(tanzr / 2.);
// --- The carbon frame of the outer chambers
par_oc[0] = (rmax-rmin)/2;
par_oc[1] = theoc;
par_oc[2] = 90.;
par_oc[3] = zmax2/2 - zmax1/4 -alfram2/2;
par_oc[4] = widmi - (inframe+alfram1)/2;
par_oc[5] = widmi - (inframe+alfram1)/2;
par_oc[6] = 0.;
par_oc[7] = zmax1/4 - alfram2/2;
par_oc[8] = widma - (inframe+alfram1)/2;
par_oc[9] = widma - (inframe+alfram1)/2;
par_oc[10] = 0.;
pMC->Gsvolu("UTCO", "TRAP", idtmed[1306], par_oc, 11);
// --- The inner part of the outer chambers (Air)
par_oc[3] -= ccframe;
par_oc[4] -= ccframe;
par_oc[5] -= ccframe;
par_oc[7] -= ccframe;
par_oc[8] -= ccframe;
par_oc[9] -= ccframe;
pMC->Gsvolu("UTIO", "TRAP", idtmed[1301], par_oc, 11);
// --- Definition of the six modules within each outer chamber
pMC->Gsdvn("UTMO", "UTIO", nmodul, 3);
// --- Definition of the layers of each outer chamber
par_oc[1] = theoc;
par_oc[2] = 90.;
par_oc[3] = -1.;
par_oc[4] = -1.;
par_oc[5] = -1.;
par_oc[6] = 0.;
par_oc[7] = -1.;
par_oc[8] = -1.;
par_oc[9] = -1.;
par_oc[10] = 0.;
// --- Radiator layer
par_oc[0] = rathick/2;
pMC->Gsvolu("UT1O", "TRAP", idtmed[1311], par_oc, 11);
// --- Polyethylene layer
par_oc[0] = pethick/2;
pMC->Gsvolu("UT2O", "TRAP", idtmed[1302], par_oc, 11);
// --- Mylar layer
par_oc[0] = mythick/2;
pMC->Gsvolu("UT3O", "TRAP", idtmed[1307], par_oc, 11);
// --- Xe/CO2 layer
par_oc[0] = xethick/2;
pMC->Gsvolu("UT4O", "TRAP", idtmed[1308], par_oc, 11);
// --- Cu layer
par_oc[0] = cuthick/2;
pMC->Gsvolu("UT5O", "TRAP", idtmed[1304], par_oc, 11);
// --- Kapton layer
par_oc[0] = kathick/2;
pMC->Gsvolu("UT6O", "TRAP", idtmed[1310], par_oc, 11);
// --- NOMEX layer
par_oc[0] = nothick/2;
pMC->Gsvolu("UT7O", "TRAP", idtmed[1309], par_oc, 11);
// --- Read out layer
par_oc[0] = rothick/2;
pMC->Gsvolu("UT8O", "TRAP", idtmed[1305], par_oc, 11);
// --- The carbon frame of the chambers in the short sectors
par_oc[0] = (rmax-rmin)/2;
par_oc[1] = theoc;
par_oc[2] = 90.;
par_oc[3] = zmax2/2 - zmax1/4 -alfram2/2;
par_oc[4] = widmi - (inframe+alfram1)/2;
par_oc[5] = widmi - (inframe+alfram1)/2;
par_oc[6] = 0.;
par_oc[7] = zmax1/4 - alfram2/2;
par_oc[8] = widma - (inframe+alfram1)/2;
par_oc[9] = widma - (inframe+alfram1)/2;
par_oc[10] = 0.;
pMC->Gsvolu("UTCS", "TRAP", idtmed[1306], par_oc, 11);
// --- The inner part of the chambers in the short sectors (Air)
par_oc[3] -= ccframe;
par_oc[4] -= ccframe;
par_oc[5] -= ccframe;
par_oc[7] -= ccframe;
par_oc[8] -= ccframe;
par_oc[9] -= ccframe;
pMC->Gsvolu("UTIS", "TRAP", idtmed[1301], par_oc, 11);
//--- Definition of the six modules within each chamber of the short sectors
pMC->Gsdvn("UTMS", "UTIS", 6, 3);
// --- Definition of the layers of each chamber in the short sectors
par_oc[1] = theoc;
par_oc[2] = 90.;
par_oc[3] = -1.;
par_oc[4] = -1.;
par_oc[5] = -1.;
par_oc[6] = 0.;
par_oc[7] = -1.;
par_oc[8] = -1.;
par_oc[9] = -1.;
par_oc[10] = 0.;
// --- Radiator layer
par_oc[0] = rathick/2;
pMC->Gsvolu("UT1S", "TRAP", idtmed[1311], par_oc, 11);
// --- Polyethylene layer
par_oc[0] = pethick/2;
pMC->Gsvolu("UT2S", "TRAP", idtmed[1302], par_oc, 11);
// --- Mylar layer
par_oc[0] = mythick/2;
pMC->Gsvolu("UT3S", "TRAP", idtmed[1307], par_oc, 11);
// --- Xe/CO2 layer
par_oc[0] = xethick/2;
pMC->Gsvolu("UT4S", "TRAP", idtmed[1308], par_oc, 11);
// --- Cu layer
par_oc[0] = cuthick/2;
pMC->Gsvolu("UT5S", "TRAP", idtmed[1304], par_oc, 11);
// --- Kapton layer
par_oc[0] = kathick/2;
pMC->Gsvolu("UT6S", "TRAP", idtmed[1310], par_oc, 11);
// --- NOMEX layer
par_oc[0] = nothick/2;
pMC->Gsvolu("UT7S", "TRAP", idtmed[1309], par_oc, 11);
// --- Read out layer
par_oc[0] = rothick/2;
pMC->Gsvolu("UT8S", "TRAP", idtmed[1305], par_oc, 11);
// --- The carbon frame of the inner chambers
par_ic[0] = widmi - (inframe+alfram1)/2;
par_ic[1] = widma - (inframe+alfram1)/2;
par_ic[2] = zmax1/4 - alfram2/2;
par_ic[3] = (rmax-rmin)/2;
pMC->Gsvolu("UTCI", "TRD1", idtmed[1306], par_ic, 4);
// --- The inner part of the inner chambers (Air)
par_ic[0] -= ccframe;
par_ic[1] -= ccframe;
par_ic[2] -= ccframe;
pMC->Gsvolu("UTII", "TRD1", idtmed[1301], par_ic, 4);
// --- Definition of the six modules within each outer chamber
pMC->Gsdvn("UTMI", "UTII", nmodul, 3);
// --- Definition of the layers of each inner chamber
par_ic[0] = -1.;
par_ic[1] = -1.;
par_ic[2] = -1.;
// --- Radiator layer
par_ic[3] = rathick/2;
pMC->Gsvolu("UT1I", "TRD1", idtmed[1311], par_ic, 4);
// --- Polyethylene layer
par_ic[3] = pethick/2;
pMC->Gsvolu("UT2I", "TRD1", idtmed[1302], par_ic, 4);
// --- Mylar layer
par_ic[3] = mythick/2;
pMC->Gsvolu("UT3I", "TRD1", idtmed[1307], par_ic, 4);
// --- Xe/CO2 layer
par_ic[3] = xethick/2;
pMC->Gsvolu("UT4I", "TRD1", idtmed[1308], par_ic, 4);
// --- Cu layer
par_ic[3] = cuthick/2;
pMC->Gsvolu("UT5I", "TRD1", idtmed[1304], par_ic, 4);
// --- Kapton layer
par_ic[3] = kathick/2;
pMC->Gsvolu("UT6I", "TRD1", idtmed[1310], par_ic, 4);
// --- NOMEX layer
par_ic[3] = nothick/2;
pMC->Gsvolu("UT7I", "TRD1", idtmed[1309], par_ic, 4);
// --- Read out layer
par_ic[3] = rothick/2;
pMC->Gsvolu("UT8I", "TRD1", idtmed[1305], par_ic, 4);
//************************************************************************
// Positioning of Volumes
//************************************************************************
// --- The rotation matrices
AliMatrix(idmat[0], 90., 180., 90., 90., 0., 0.);
AliMatrix(idmat[1], 90., 0., 90., 90., 180., 0.);
AliMatrix(idmat[2], 90., 180., 90., 90., 180., 0.);
AliMatrix(idmat[3], 90., 90., 180., 0., 90., 0.);
AliMatrix(idmat[4], 90., 90., 0., 0., 90., 0.);
// --- Position of the layers in a TRD module
f = TMath::Tan(theoc * kDegrad);
pMC->Gspos("UT8O", 1, "UTMO", 0., f*rozpos, rozpos, 0, "ONLY");
pMC->Gspos("UT7O", 1, "UTMO", 0., f*nozpos, nozpos, 0, "ONLY");
pMC->Gspos("UT6O", 1, "UTMO", 0., f*kazpos, kazpos, 0, "ONLY");
pMC->Gspos("UT5O", 1, "UTMO", 0., f*cuzpos, cuzpos, 0, "ONLY");
pMC->Gspos("UT4O", 1, "UTMO", 0., f*xezpos, xezpos, 0, "ONLY");
pMC->Gspos("UT3O", 1, "UTMO", 0., f*myzpos, myzpos, 0, "ONLY");
pMC->Gspos("UT1O", 1, "UTMO", 0., f*razpos, razpos, 0, "ONLY");
pMC->Gspos("UT2O", 1, "UT1O", 0., f*pezpos, pezpos, 0, "ONLY");
pMC->Gspos("UT8S", 1, "UTMS", 0., f*rozpos, rozpos, 0, "ONLY");
pMC->Gspos("UT7S", 1, "UTMS", 0., f*nozpos, nozpos, 0, "ONLY");
pMC->Gspos("UT6S", 1, "UTMS", 0., f*kazpos, kazpos, 0, "ONLY");
pMC->Gspos("UT5S", 1, "UTMS", 0., f*cuzpos, cuzpos, 0, "ONLY");
pMC->Gspos("UT4S", 1, "UTMS", 0., f*xezpos, xezpos, 0, "ONLY");
pMC->Gspos("UT3S", 1, "UTMS", 0., f*myzpos, myzpos, 0, "ONLY");
pMC->Gspos("UT1S", 1, "UTMS", 0., f*razpos, razpos, 0, "ONLY");
pMC->Gspos("UT2S", 1, "UT1S", 0., f*pezpos, pezpos, 0, "ONLY");
pMC->Gspos("UT8I", 1, "UTMI", 0., 0., rozpos, 0, "ONLY");
pMC->Gspos("UT7I", 1, "UTMI", 0., 0., nozpos, 0, "ONLY");
pMC->Gspos("UT6I", 1, "UTMI", 0., 0., kazpos, 0, "ONLY");
pMC->Gspos("UT5I", 1, "UTMI", 0., 0., cuzpos, 0, "ONLY");
pMC->Gspos("UT4I", 1, "UTMI", 0., 0., xezpos, 0, "ONLY");
pMC->Gspos("UT3I", 1, "UTMI", 0., 0., myzpos, 0, "ONLY");
pMC->Gspos("UT1I", 1, "UTMI", 0., 0., razpos, 0, "ONLY");
pMC->Gspos("UT2I", 1, "UT1I", 0., 0., pezpos, 0, "ONLY");
// --- Position of the inner part of the chambers
pMC->Gspos("UTII", 1, "UTCI", 0., 0., 0., 0, "ONLY");
pMC->Gspos("UTIO", 1, "UTCO", 0., 0., 0., 0, "ONLY");
pMC->Gspos("UTIS", 1, "UTCS", 0., 0., 0., 0, "ONLY");
// --- Position of the chambers in the support frame
xpos = 0.;
ypos = (zmax1-zmax2)/4;
zpos = 0.;
pMC->Gspos("UTCO", 1, "UTFO", xpos, ypos, zpos, 0, "ONLY");
xpos = 0.;
ypos = (zmax1-zmax2)/4;
zpos = 0.;
pMC->Gspos("UTCS", 1, "UTFS", xpos, ypos, zpos, 0, "ONLY");
xpos = 0.;
ypos = 0.;
zpos = 0.;
pMC->Gspos("UTCI", 1, "UTFI", xpos, ypos, zpos, 0, "ONLY");
// --- Position of the inner part of the frame in the sectors
xpos = (rmax+rmin)/2;
ypos = 0;
zpos = -zmax1*3/4;
pMC->Gspos("UTFO", 1, "UTSL", xpos, ypos, zpos, idmat[4], "ONLY");
xpos = (rmax+rmin)/2;
ypos = 0;
zpos = -zmax1*3/4;
pMC->Gspos("UTFS", 1, "UTSS", xpos, ypos, zpos, idmat[4], "ONLY");
xpos = (rmax+rmin)/2;
ypos = 0.;
zpos = -zmax1/4;
pMC->Gspos("UTFI", 1, "UTSL", xpos, ypos, zpos, idmat[4], "ONLY");
// --- Position of the subdetectors in the mother volume
pMC->Gspos("UTRL", 1, "TRD ", 0., 0., 0., 0, "ONLY");
pMC->Gspos("UTRL", 2, "TRD ", 0., 0., 0., idmat[0], "ONLY");
pMC->Gspos("UTRL", 3, "TRD ", 0., 0., 0., idmat[1], "ONLY");
pMC->Gspos("UTRL", 4, "TRD ", 0., 0., 0., idmat[2], "ONLY");
pMC->Gspos("UTRS", 1, "TRD ", 0., 0., 0., 0, "ONLY");
pMC->Gspos("UTRS", 2, "TRD ", 0., 0., 0., idmat[1], "ONLY");
// --- Position of TRD mother volume in ALICE experiment
pMC->Gspos("TRD ", 1, "ALIC", 0., 0., 0., 0, "ONLY");
}
//_____________________________________________________________________________
void AliTRDv1::DrawModule()
{
//
// Draw a shaded view of the Transition Radiation Detector version 1
//
AliMC* pMC = AliMC::GetMC();
// Set everything unseen
pMC->Gsatt("*", "seen", -1);
//
// Set ALIC mother transparent
pMC->Gsatt("ALIC","SEEN",0);
//
// Set the volumes visible
pMC->Gsatt("TRD","SEEN",0);
pMC->Gsatt("UTRL","SEEN",0);
pMC->Gsatt("UTSL","SEEN",0);
pMC->Gsatt("UTRS","SEEN",0);
pMC->Gsatt("UTSS","SEEN",0);
pMC->Gsatt("UTFI","SEEN",0);
pMC->Gsatt("UTFO","SEEN",0);
pMC->Gsatt("UTFS","SEEN",0);
pMC->Gsatt("UTCO","SEEN",0);
pMC->Gsatt("UTIO","SEEN",0);
pMC->Gsatt("UTMO","SEEN",0);
pMC->Gsatt("UT1O","SEEN",1);
pMC->Gsatt("UT4O","SEEN",1);
pMC->Gsatt("UTCS","SEEN",0);
pMC->Gsatt("UTIS","SEEN",0);
pMC->Gsatt("UTMS","SEEN",0);
pMC->Gsatt("UT1S","SEEN",1);
pMC->Gsatt("UT4S","SEEN",1);
pMC->Gsatt("UTCI","SEEN",0);
pMC->Gsatt("UTII","SEEN",0);
pMC->Gsatt("UTMI","SEEN",0);
pMC->Gsatt("UT1I","SEEN",1);
pMC->Gsatt("UT4I","SEEN",1);
//
pMC->Gdopt("hide", "on");
pMC->Gdopt("shad", "on");
pMC->Gsatt("*", "fill", 7);
pMC->SetClipBox(".");
pMC->SetClipBox("*", 0, 2000, -2000, 2000, -2000, 2000);
pMC->DefaultRange();
pMC->Gdraw("alic", 40, 30, 0, 12, 9.4, .021, .021);
pMC->Gdhead(1111, "Transition Radiation Detector Version 1");
pMC->Gdman(18, 4, "MAN");
}
//_____________________________________________________________________________
void AliTRDv1::CreateMaterials()
{
//
// Create materials for the Transition Radiation Detector version 1
//
printf("TRD: Fast simulation with coarse geometry\n");
AliTRD::CreateMaterials();
}
//_____________________________________________________________________________
void AliTRDv1::Init()
{
//
// Initialise the Transition Radiation Detector after the geometry is built
//
AliTRD::Init();
AliMC* pMC = AliMC::GetMC();
fIdSens1 = pMC->VolId("UT5I");
fIdSens2 = pMC->VolId("UT5O");
fIdSens3 = pMC->VolId("UT5S");
}
//_____________________________________________________________________________
void AliTRDv1::StepManager()
{
//
// Called at every step in the Transition Radiation Detector
//
Int_t vol[3];
Int_t icopy1, icopy5, icopy6, idSens, icSens;
Float_t hits[4];
TClonesArray &lhits = *fHits;
AliMC* pMC = AliMC::GetMC();
// Use only charged tracks and count them only once per volume
if(pMC->TrackCharge() && pMC->TrackEntering()) {
// Check on sensitive volume
idSens = pMC->CurrentVol(0,icSens);
// Long sectors
if ((idSens == fIdSens1) || (idSens == fIdSens2)) {
pMC->CurrentVolOff(1,0,icopy1);
pMC->CurrentVolOff(5,0,icopy5);
pMC->CurrentVolOff(6,0,icopy6);
// The sector number
if ((icopy6 == 1) || (icopy6 == 3))
vol[0] = icopy5;
else
vol[0] = 16 - icopy5;
// The chamber number
if (idSens == fIdSens2) {
if (icopy6 < 3)
vol[1] = 4;
else
vol[1] = 1;
}
else {
if (icopy6 < 3)
vol[1] = 3;
else
vol[1] = 2;
}
// The plane number
vol[2] = icopy1;
pMC->TrackPosition(hits);
hits[3] = 0;
new(lhits[fNhits++]) AliTRDhit(fIshunt,gAlice->CurrentTrack(),vol,hits);
}
// Short sectors
else if (idSens == fIdSens3) {
pMC->CurrentVolOff(1,0,icopy1);
pMC->CurrentVolOff(5,0,icopy5);
pMC->CurrentVolOff(6,0,icopy6);
// The sector number
vol[0] = icopy5 + 5;
// The chamber number
if (icopy6 == 1)
vol[1] = 4;
else
vol[1] = 1;
// The plane number
vol[2] = icopy1;
pMC->TrackPosition(hits);
hits[3] = 0;
new(lhits[fNhits++]) AliTRDhit(fIshunt,gAlice->CurrentTrack(),vol,hits);
}
}
}