///////////////////////////////////////////////////////////////////////////////
// //
// Inner Traking System version 0 //
// //
//Begin_Html
/*
The responsible person for this module is
Roberto Barbera.
*/
//End_Html
// //
///////////////////////////////////////////////////////////////////////////////
#include
#include
#include
#include "AliITSv0.h"
#include "AliRun.h"
#include "AliMC.h"
#include "AliConst.h"
ClassImp(AliITSv0)
//_____________________________________________________________________________
AliITSv0::AliITSv0() : AliITS()
{
//
// Default constructor for ITS
//
}
//_____________________________________________________________________________
AliITSv0::AliITSv0(const char *name, const char *title)
: AliITS(name, title)
{
//
// Standard constructor for ITS
//
}
//_____________________________________________________________________________
void AliITSv0::CreateGeometry()
{
//
// Create Geometry for ITS version 0
//
//Begin_Html
/*
*/
//End_Html
//Begin_Html
/*
*/
//End_Html
AliMC* pMC = AliMC::GetMC();
Float_t rl[6] = { 3.9,7.6,14.,24.,40.,45. }; //SILICON LAYERS INNER RADIUS
Float_t drl[6] = { .755,.755,.809,.809,.7,.7 }; //THICKNESS OF LAYERS (in % radiation length)
Float_t dzl[6] = { 12.67,16.91,20.85,29.15,45.11,50.975 }; //HALF LENGTH OF LAYERS
Float_t drpcb[6] = { 0.,0.,.06,.06,0.,0. }; //PCB THICKNESS
Float_t drcu[6] = { 0.,0.,.0504,.0504,.0357,.0357 }; //COPPER THICKNESS
Float_t drsi[6] = { 0.,0.,.006,.006,.3571,.3571 }; //SILICON THICKNESS
Float_t drcer[6] = { 0.,0.,.08,.08,0.,0. }; //CERAMICS THICKNESS
Float_t drepx[6] = { 0.,0.,0.,0.,.5357,.5357 }; //EPOXY THICKNESS
Float_t drpla[6] = { 0.,0.,0.,0.,.1786,.1786 }; //PLASTIC THICKNESS
Float_t dzb[6] = { 0.,0.,15.,15.,4.,4. }; //LENGTH OF BOXES
Float_t dphi[6] = { 72.,72.,72.,72.,50.6,45. }; //COVERED PHI-RANGE FOR LAYERS 1-6
Float_t drca;
//Float_t dzfc, dwat;
Int_t i, nsec;
Float_t rend, drca_tpc, dzco, zend, dits[3], rlim, drsu, zmax;
Float_t zpos, dzco1, dzco2;
Float_t drcac[6], acone, dphii;
Float_t pcits[15], xltpc;
Float_t rstep, r0, z0, acable, fp, dz, zi, ri;
Int_t idrotm[399];
Float_t rzcone;
Float_t dgh[15];
Int_t *idtmed = gAlice->Idtmed();
// CONVERT INTO CM (RL(SI)=9.36 CM)
for (i = 0; i < 6; ++i) {
drl[i] = drl[i]/100. * 9.36;
}
// SUPPORT ENDPLANE THICKNESS
drsu = 2.*0.06 + 1./20; // 1./20. is 1 cm of honeycomb (1/20 carbon density)
// CABLE THICKNESS (HORIZONTAL CABLES CONNECTING THE LAYERS)
drca = .2;
// WATER THICKNESS
//dwat = .1;
// CONE BELOW TPC
drca_tpc = 1.2/4.;
// CABLE THICKNESS (CONICAL CABLES CONNECTING THE LAYERS)
// ITS CONE ANGLE
acone = 45.;
acone *= kDegrad;
// CONE RADIUS AT 1ST LAYER
rzcone = 30.;
// FIELD CAGE HALF LENGTH
//dzfc = 64.5;
rlim = 48.;
zmax = 80.;
xltpc = 275.;
// PARAMETERS FOR SMALL (1/2) ITS
// DO I=1,6
// DZL(I)=DZL(I)/2.
// DZB(I)=DZB(I)/2.
// ENDDO
// DRCA=DRCA/2.
// ACONE=ACONE/2.
// DRCA_TPC=DRCA_TPC/2.
// RZCONE=RZCONE/2.
// DZFC=DZFC/2.
// ZMAX=ZMAX/2.
// XLTPC=XLTPC/2.
acable = 8.5;
// EQUAL DISTRIBUTION INTO THE 6 LAYERS
rstep = drca_tpc / 6.;
for (i = 0; i < 6; ++i) {
drcac[i] = (i+1) * rstep;
}
// NUMBER OF PHI SECTORS
nsec = 5;
// NOW PACK USING THICKNESS
for (i = 0; i < 6; ++i) {
// PACKING FACTOR
fp = rl[5] / rl[i];
// PHI-PACKING NOT SUFFICIENT ?
if (dphi[i]/45 < fp) {
drcac[i] = drcac[i]*fp*45/dphi[i];
}
}
// --- Define ghost volume containing the six layers and fill it with air
dgh[0] = 3.5;
dgh[1] = 50.;
dgh[2] = zmax;
pMC->Gsvolu("ITSV", "TUBE", idtmed[275], dgh, 3);
// --- Place the ghost volume in its mother volume (ALIC) and make it
// invisible
pMC->Gspos("ITSV", 1, "ALIC", 0., 0., 0., 0, "ONLY");
pMC->Gsatt("ITSV", "SEEN", 0);
// ITS LAYERS (SILICON)
dits[0] = rl[0];
dits[1] = rl[0] + drl[0];
dits[2] = dzl[0];
pMC->Gsvolu("ITS1", "TUBE", idtmed[199], dits, 3);
pMC->Gspos("ITS1", 1, "ITSV", 0., 0., 0., 0, "ONLY");
dits[0] = rl[1];
dits[1] = rl[1] + drl[1];
dits[2] = dzl[1];
pMC->Gsvolu("ITS2", "TUBE", idtmed[199], dits, 3);
pMC->Gspos("ITS2", 1, "ITSV", 0., 0., 0., 0, "ONLY");
dits[0] = rl[2];
dits[1] = rl[2] + drl[2];
dits[2] = dzl[2];
pMC->Gsvolu("ITS3", "TUBE", idtmed[224], dits, 3);
pMC->Gspos("ITS3", 1, "ITSV", 0., 0., 0., 0, "ONLY");
dits[0] = rl[3];
dits[1] = rl[3] + drl[3];
dits[2] = dzl[3];
pMC->Gsvolu("ITS4", "TUBE", idtmed[224], dits, 3);
pMC->Gspos("ITS4", 1, "ITSV", 0., 0., 0., 0, "ONLY");
dits[0] = rl[4];
dits[1] = rl[4] + drl[4];
dits[2] = dzl[4];
pMC->Gsvolu("ITS5", "TUBE", idtmed[249], dits, 3);
pMC->Gspos("ITS5", 1, "ITSV", 0., 0., 0., 0, "ONLY");
dits[0] = rl[5];
dits[1] = rl[5] + drl[5];
dits[2] = dzl[5];
pMC->Gsvolu("ITS6", "TUBE", idtmed[249], dits, 3);
pMC->Gspos("ITS6", 1, "ITSV", 0., 0., 0., 0, "ONLY");
// ELECTRONICS BOXES
// PCB (layer #3 and #4)
pMC->Gsvolu("IPCB", "TUBE", idtmed[233], dits, 0);
for (i = 2; i < 4; ++i) {
dits[0] = rl[i];
dits[1] = dits[0] + drpcb[i];
dits[2] = dzb[i] / 2.;
zpos = dzl[i] + dits[2];
pMC->Gsposp("IPCB", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
pMC->Gsposp("IPCB", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
}
// COPPER (layer #3 and #4)
pMC->Gsvolu("ICO2", "TUBE", idtmed[234], dits, 0);
for (i = 2; i < 4; ++i) {
dits[0] = rl[i] + drpcb[i];
dits[1] = dits[0] + drcu[i];
dits[2] = dzb[i] / 2.;
zpos = dzl[i] + dits[2];
pMC->Gsposp("ICO2", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
pMC->Gsposp("ICO2", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
}
// CERAMICS (layer #3 and #4)
pMC->Gsvolu("ICER", "TUBE", idtmed[235], dits, 0);
for (i = 2; i < 4; ++i) {
dits[0] = rl[i] + drpcb[i] + drcu[i];
dits[1] = dits[0] + drcer[i];
dits[2] = dzb[i] / 2.;
zpos = dzl[i] + dits[2];
pMC->Gsposp("ICER", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
pMC->Gsposp("ICER", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
}
// SILICON (layer #3 and #4)
pMC->Gsvolu("ISI2", "TUBE", idtmed[226], dits, 0);
for (i = 2; i < 4; ++i) {
dits[0] = rl[i] + drpcb[i] + drcu[i] + drcer[i];
dits[1] = dits[0] + drsi[i];
dits[2] = dzb[i] / 2.;
zpos = dzl[i - 1] + dits[2];
pMC->Gsposp("ISI2", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
pMC->Gsposp("ISI2", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
}
// PLASTIC (G10FR4) (layer #5 and #6)
pMC->Gsvolu("IPLA", "TUBE", idtmed[262], dits, 0);
for (i = 4; i < 6; ++i) {
dits[0] = rl[i];
dits[1] = dits[0] + drpla[i];
dits[2] = dzb[i] / 2.;
zpos = dzl[i] + dits[2];
pMC->Gsposp("IPLA", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
pMC->Gsposp("IPLA", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
}
// COPPER (layer #5 and #6)
pMC->Gsvolu("ICO3", "TUBE", idtmed[259], dits, 0);
for (i = 4; i < 6; ++i) {
dits[0] = rl[i] + drpla[i];
dits[1] = dits[0] + drcu[i];
dits[2] = dzb[i] / 2.;
zpos = dzl[i] + dits[2];
pMC->Gsposp("ICO3", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
pMC->Gsposp("ICO3", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
}
// EPOXY (layer #5 and #6)
pMC->Gsvolu("IEPX", "TUBE", idtmed[262], dits, 0);
for (i = 4; i < 6; ++i) {
dits[0] = rl[i] + drpla[i] + drcu[i];
dits[1] = dits[0] + drepx[i];
dits[2] = dzb[i] / 2.;
zpos = dzl[i] + dits[2];
pMC->Gsposp("IEPX", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
pMC->Gsposp("IEPX", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
}
// SILICON (layer #5 and #6)
pMC->Gsvolu("ISI3", "TUBE", idtmed[251], dits, 0);
for (i = 4; i < 6; ++i) {
dits[0] = rl[i] + drpla[i] + drcu[i] + drepx[i];
dits[1] = dits[0] + drsi[i];
dits[2] = dzb[i] / 2.;
zpos = dzl[i] + dits[2];
pMC->Gsposp("ISI3", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
pMC->Gsposp("ISI3", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
}
// SUPPORT
pMC->Gsvolu("ISUP", "TUBE", idtmed[274], dits, 0);
for (i = 0; i < 6; ++i) {
dits[0] = rl[i];
if (i < 5) dits[1] = rl[i+1];
else dits[1] = rlim;
dits[2] = drsu / 2.;
zpos = dzl[i] + dzb[i] + dits[2];
pMC->Gsposp("ISUP", i+1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
pMC->Gsposp("ISUP", i+7, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
}
// CABLES (HORIZONTAL)
pMC->Gsvolu("ICHO", "TUBE", idtmed[278], dits, 0);
for (i = 0; i < 6; ++i) {
dits[0] = rl[i];
dits[1] = dits[0] + drca;
dits[2] = (rzcone + TMath::Tan(acone) * (rl[i] - rl[0]) - (dzl[i]+ dzb[i] + drsu)) / 2.;
zpos = dzl[i] + dzb[i] + drsu + dits[2];
pMC->Gsposp("ICHO", i+1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
pMC->Gsposp("ICHO", i+7, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
}
// DEFINE A CONICAL GHOST VOLUME FOR THE PHI SEGMENTATION
pcits[0] = 0.;
pcits[1] = 360.;
pcits[2] = 2.;
pcits[3] = rzcone;
pcits[4] = 3.5;
pcits[5] = rl[0];
pcits[6] = pcits[3] + TMath::Tan(acone) * (rlim - rl[0]);
pcits[7] = rlim - rl[0] + 3.5;
pcits[8] = rlim;
pMC->Gsvolu("ICMO", "PCON", idtmed[275], pcits, 9);
AliMatrix(idrotm[200], 90., 0., 90., 90., 180., 0.);
pMC->Gspos("ICMO", 1, "ITSV", 0., 0., 0., 0, "ONLY");
pMC->Gspos("ICMO", 2, "ITSV", 0., 0., 0., idrotm[200], "ONLY");
// DIVIDE INTO NSEC PHI-SECTIONS
pMC->Gsdvn("ICMD", "ICMO", nsec, 2);
pMC->Gsatt("ICMO", "SEEN", 0);
pMC->Gsatt("ICMD", "SEEN", 0);
// CONICAL CABLES
pcits[2] = 2.;
pMC->Gsvolu("ICCO", "PCON", idtmed[278], pcits, 0);
for (i = 1; i < 6; ++i) {
pcits[0] = -dphi[i] / 2.;
pcits[1] = dphi[i];
if (i < 5) {
dzco = TMath::Tan(acone) * (rl[i] - rl[i-1]);
} else {
dzco1 = zmax - (rzcone + TMath::Tan(acone) * (rl[5] - rl[0])) -2.;
dzco2 = (rlim - rl[5]) * TMath::Tan(acone);
if (rl[5] + dzco1 / TMath::Tan(acone) < rlim) {
dzco = dzco1;
} else {
dzco = dzco2;
}
}
pcits[3] = rzcone + TMath::Tan(acone) * (rl[i] - rl[0]);
pcits[4] = rl[i] - drcac[i] / TMath::Sin(acone);
pcits[5] = rl[i];
pcits[6] = pcits[3] + dzco;
pcits[7] = rl[i] + dzco / TMath::Tan(acone) - drcac[i] / TMath::Sin(acone);
pcits[8] = rl[i] + dzco / TMath::Tan(acone);
pMC->Gsposp("ICCO", i, "ICMD", 0., 0., 0., 0, "ONLY", pcits, 9);
}
zend = pcits[6];
rend = pcits[8];
// CONICAL CABLES BELOW TPC
// DEFINE A CONICAL GHOST VOLUME FOR THE PHI SEGMENTATION
pcits[0] = 0.;
pcits[1] = 360.;
pcits[2] = 2.;
pcits[3] = zend;
pcits[5] = rend;
pcits[4] = pcits[5] - drca_tpc;
pcits[6] = xltpc;
pcits[8] = pcits[4] + (pcits[6] - pcits[3]) * TMath::Tan(acable * kDegrad);
pcits[7] = pcits[8] - drca_tpc;
AliMatrix(idrotm[200], 90., 0., 90., 90., 180., 0.);
pMC->Gsvolu("ICCM", "PCON", idtmed[275], pcits, 9);
pMC->Gspos("ICCM", 1, "ALIC", 0., 0., 0., 0, "ONLY");
pMC->Gspos("ICCM", 2, "ALIC", 0., 0., 0., idrotm[200], "ONLY");
pMC->Gsdvn("ITMD", "ICCM", nsec, 2);
pMC->Gsatt("ITMD", "SEEN", 0);
pMC->Gsatt("ICCM", "SEEN", 0);
// NOW PLACE SEGMENTS WITH DECREASING PHI SEGMENTS INTO THE
// GHOST-VOLUME
pcits[2] = 2.;
pMC->Gsvolu("ITTT", "PCON", idtmed[278], pcits, 0);
r0 = rend;
z0 = zend;
dz = (xltpc - zend) / 9.;
for (i = 0; i < 9; ++i) {
zi = z0 + i* dz + dz / 2.;
ri = r0 + (zi - z0) * TMath::Tan(acable * kDegrad);
dphii = dphi[5] * r0 / ri;
pcits[0] = -dphii / 2.;
pcits[1] = dphii;
pcits[3] = zi - dz / 2.;
pcits[5] = r0 + (pcits[3] - z0) * TMath::Tan(acable * kDegrad);
pcits[4] = pcits[5] - drca_tpc;
pcits[6] = zi + dz / 2.;
pcits[8] = r0 + (pcits[6] - z0) * TMath::Tan(acable * kDegrad);
pcits[7] = pcits[8] - drca_tpc;
pMC->Gsposp("ITTT", i+1, "ITMD", 0., 0., 0., 0, "ONLY", pcits, 9);
}
// --- Outputs the geometry tree in the EUCLID/CAD format
if (fEuclidOut) {
pMC->WriteEuclid("ITSgeometry", "ITSV", 1, 5);
}
}
//_____________________________________________________________________________
void AliITSv0::DrawModule()
{
//
// Draw a shaded view of the FMD version 1
//
AliMC* pMC = AliMC::GetMC();
// Set everything unseen
pMC->Gsatt("*", "seen", -1);
//
// Set ALIC mother visible
pMC->Gsatt("ALIC","SEEN",0);
//
// Set the volumes visible
pMC->Gsatt("ITSV","SEEN",0);
pMC->Gsatt("ITS1","SEEN",1);
pMC->Gsatt("ITS2","SEEN",1);
pMC->Gsatt("ITS3","SEEN",1);
pMC->Gsatt("ITS4","SEEN",1);
pMC->Gsatt("ITS5","SEEN",1);
pMC->Gsatt("ITS6","SEEN",1);
pMC->Gsatt("ISI2","SEEN",1);
pMC->Gsatt("IPLA","SEEN",1);
pMC->Gsatt("ICHO","SEEN",1);
pMC->Gsatt("ICMO","SEEN",0);
pMC->Gsatt("ICMD","SEEN",0);
pMC->Gsatt("ICCO","SEEN",1);
pMC->Gsatt("ICCM","SEEN",0);
pMC->Gsatt("ITMD","SEEN",0);
pMC->Gsatt("ITTT","SEEN",1);
//
pMC->Gdopt("hide", "on");
pMC->Gdopt("shad", "on");
pMC->Gsatt("*", "fill", 7);
pMC->SetClipBox(".");
pMC->SetClipBox("*", 0, 300, -300, 300, -300, 300);
pMC->DefaultRange();
pMC->Gdraw("alic", 40, 30, 0, 11, 10, .05, .05);
pMC->Gdhead(1111, "Inner Tracking System Version 0");
pMC->Gdman(16, 6, "MAN");
}
//_____________________________________________________________________________
void AliITSv0::StepManager()
{
//
// Called at every step in the ITS
//
Int_t copy, id;
Float_t hits[7];
Int_t vol[3];
Float_t position[3];
Float_t momentum[4];
TClonesArray &lhits = *fHits;
AliMC* pMC = AliMC::GetMC();
//
if(pMC->TrackCharge() && pMC->Edep()) {
//
// Only entering charged tracks
if((id=pMC->CurrentVol(0,copy))==fIdSens1) {
vol[0]=1;
id=pMC->CurrentVolOff(1,0,copy);
vol[1]=copy;
id=pMC->CurrentVolOff(2,0,copy);
vol[2]=copy;
} else if(id==fIdSens2) {
vol[0]=2;
id=pMC->CurrentVolOff(1,0,copy);
vol[1]=copy;
id=pMC->CurrentVolOff(2,0,copy);
vol[2]=copy;
} else if(id==fIdSens3) {
vol[0]=3;
vol[1]=copy;
id=pMC->CurrentVolOff(1,0,copy);
vol[2]=copy;
} else if(id==fIdSens4) {
vol[0]=4;
vol[1]=copy;
id=pMC->CurrentVolOff(1,0,copy);
vol[2]=copy;
} else if(id==fIdSens5) {
vol[0]=5;
vol[1]=copy;
id=pMC->CurrentVolOff(1,0,copy);
vol[2]=copy;
} else if(id==fIdSens6) {
vol[0]=6;
vol[1]=copy;
id=pMC->CurrentVolOff(1,0,copy);
vol[2]=copy;
} else return;
pMC->TrackPosition(position);
pMC->TrackMomentum(momentum);
hits[0]=position[0];
hits[1]=position[1];
hits[2]=position[2];
hits[3]=momentum[0]*momentum[3];
hits[4]=momentum[1]*momentum[3];
hits[5]=momentum[2]*momentum[3];
hits[6]=pMC->Edep();
new(lhits[fNhits++]) AliITShit(fIshunt,gAlice->CurrentTrack(),vol,hits);
}
}