///////////////////////////////////////////////////////////////////////////////
// //
// Beam pipe class //
// //
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/*
*/
//End_Html
// //
///////////////////////////////////////////////////////////////////////////////
#include "AliPIPEv3.h"
#include "AliRun.h"
#include "AliMC.h"
ClassImp(AliPIPEv3)
//_____________________________________________________________________________
AliPIPEv3::AliPIPEv3()
{
//
// Default constructor for beam pipe
//
}
//_____________________________________________________________________________
AliPIPEv3::AliPIPEv3(const char *name, const char *title)
: AliPIPE(name,title)
{
//
// Standard constructor for beam pipe
//
}
//_____________________________________________________________________________
void AliPIPEv3::CreateGeometry()
{
//
// Create Beam Pipe geometry
//
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//Begin_Html
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Float_t tpar[3], dzmo, zpos;
Float_t bepar[3], alpar[3],sspar[3],flange[3],vacpar[3];
Float_t bellow[3];
// Float_t undul[3];
// const Double_t z_flange = 150;
//for undulated structure
char cn18[][5]={"CN01","CN02","CN03","CN04","CN05","CN06","CN07","CN08"};
char cn48[][5]={"CN21","CN22","CN23","CN24","CN25","CN26","CN27","CN28"};
// char undul[][5]={'BELO','UNDL'};
Float_t zundul;
Float_t rundul;
Float_t pitch;
Float_t thick;
Int_t *idtmed = fIdtmed->GetArray()-1999;
// the mother of all beam pipes
tpar[0] = 0.;
tpar[1] = 10.;
tpar[2] = 1400. / 2;
dzmo = tpar[2];
gMC->Gsvolu("QQMO", "TUBE", idtmed[2015], tpar, 3);
// All beam pipe details as per the provisonal drawings given by Lars
// Leistam on 31.5.99
// Beryllium beam pipe, length 56.6 cm, centered at vertex
bepar[0]=0.0;
bepar[1]=3.0;
bepar[2]=28.3;
zpos=0.0;
vacpar[0]=0.0;
vacpar[1]=2.9;
vacpar[2]=bepar[2];
//
gMC->Gsvolu("QQBE", "TUBE", idtmed[2004], bepar, 3);
gMC->Gsvolu("VAC1", "TUBE", idtmed[2015], vacpar, 3);
gMC->Gspos("VAC1", 1, "QQBE", 0., 0., 0., 0, "ONLY");
gMC->Gspos("QQBE", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
// now beam pipes only in negative z-part for use in PMD.
// SS Flange 4 cm thick, 5.8 cm ID, 6.3 cm OD
flange[0]=0.0;
flange[1]=3.15;
flange[2]=2.0;
zpos = zpos -bepar[2] - flange[2];
vacpar[0]=0.0;
vacpar[1]=2.9;
vacpar[2]=flange[2];
//
gMC->Gsvolu("QFL1", "TUBE", idtmed[2018], flange, 3);
gMC->Gsvolu("VAC2", "TUBE", idtmed[2015], vacpar, 3);
gMC->Gspos("VAC2", 1, "QFL1", 0., 0., 0., 0, "ONLY");
gMC->Gspos("QFL1", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
// Aluminium alloy beam pipe, 1mm thick, 230 cm long
alpar[0]=0.0;
alpar[1]=3.0;
alpar[2]=115.;
zpos = zpos - flange[2] - alpar[2];
vacpar[0]=0.0;
vacpar[1]=2.9;
vacpar[2]=alpar[2];
gMC->Gsvolu("QQAL", "TUBE", idtmed[2003], alpar, 3);
gMC->Gsvolu("VAC3", "TUBE", idtmed[2015], vacpar, 3);
gMC->Gspos("VAC3", 1, "QQAL", 0., 0., 0., 0, "ONLY");
gMC->Gspos("QQAL", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
// SS tube 2.0 cm long, 0.8 mm thick, 5.96 cm OD
sspar[0]=0.0;
sspar[1]=2.98;
sspar[2]=1.0;
zpos = zpos - alpar[2] - sspar[2];
vacpar[0]=0.0;
vacpar[1]=2.9;
vacpar[2]=sspar[2];
gMC->Gsvolu("QSS1", "TUBE", idtmed[2018], sspar, 3);
gMC->Gsvolu("VAC4", "TUBE", idtmed[2015], vacpar, 3);
gMC->Gspos("VAC4", 1, "QSS1", 0., 0., 0., 0, "ONLY");
gMC->Gspos("QSS1", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
// SS Flange 3 cm thick 7.4 cm OD, 5.8 cm ID
flange[0]=0.0;
flange[1]=3.7;
flange[2]=1.5;
zpos = zpos - sspar[2] - flange[2];
vacpar[0]=0.0;
vacpar[1]=2.9;
vacpar[2]=flange[2];
gMC->Gsvolu("QFL2", "TUBE", idtmed[2018], flange, 3);
gMC->Gsvolu("VAC5", "TUBE", idtmed[2015], vacpar, 3);
gMC->Gspos("VAC5", 1, "QFL2", 0., 0., 0., 0, "ONLY");
gMC->Gspos("QFL2", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
// SS tube 4.0 cm long, 0.8 mm thick, 5.96 cm OD
sspar[0]=0.0;
sspar[1]=2.98;
sspar[2]=2.0;
zpos = zpos - flange[2] - sspar[2];
vacpar[0]=0.0;
vacpar[1]=2.9;
vacpar[2]=sspar[2];
gMC->Gsvolu("QSS2", "TUBE", idtmed[2018], sspar, 3);
gMC->Gsvolu("VAC6", "TUBE", idtmed[2015], vacpar, 3);
gMC->Gspos("VAC6", 1, "QSS2", 0., 0., 0., 0, "ONLY");
gMC->Gspos("QSS2", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
// *************
// SS Bellow 8.4 cm long, 6.5 cm ID, 7.5 cm OD
// 0.8 mm thick material, 0.3 cm pitch.
// zundul=4.2, rundul=6.5, thick=0.08
// **************
pitch=0.3;
thick=0.08;
zundul=4.2;
rundul=6.5;
Undulation("BELO",pitch,thick,zundul,rundul,cn18);
//
bellow[2]=zundul;
zpos = zpos - sspar[2] - bellow[2];
gMC->Gspos("BELO", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
// SS tube 20.0 cm long, 0.8 mm thick, 5.96 cm OD
sspar[0]=0.0;
sspar[1]=2.98;
sspar[2]=10.0;
zpos = zpos - bellow[2] - sspar[2];
vacpar[0]=0.0;
vacpar[1]=2.9;
vacpar[2]=sspar[2];
gMC->Gsvolu("QSS3", "TUBE", idtmed[2018], sspar, 3);
gMC->Gsvolu("VAC7", "TUBE", idtmed[2015], vacpar, 3);
gMC->Gspos("VAC7", 1, "QSS3", 0., 0., 0., 0, "ONLY");
gMC->Gspos("QSS3", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
// *************
// SS Bellow 8.4 cm long, 6.5 cm ID, 7.5 cm OD
// 0.8 mm thick material, 0.3 cm pitch.
// **************
//
zpos = zpos - sspar[2] - bellow[2];
gMC->Gspos("BELO", 2, "QQMO", 0., 0., zpos, 0, "ONLY");
// SS tube 4.7 cm long, 0.8 mm thick,
sspar[0]=0.0;
sspar[1]=2.98;
sspar[2]=4.7/2.;
zpos = zpos - bellow[2] - sspar[2];
vacpar[0]=0.0;
vacpar[1]=2.9;
vacpar[2]=sspar[2];
gMC->Gsvolu("QSS4", "TUBE", idtmed[2018], sspar, 3);
gMC->Gsvolu("VAC8", "TUBE", idtmed[2015], vacpar, 3);
gMC->Gspos("VAC8", 1, "QSS4", 0., 0., 0., 0, "ONLY");
gMC->Gspos("QSS4", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
// SS Flange 2.2 cm thick, ID=5.8 cm, OD=9.8 cm
flange[0]=0.0;
flange[1]=4.9;
flange[2]=1.1;
zpos = zpos - sspar[2] - flange[2];
vacpar[0]=0.0;
vacpar[1]=2.9;
vacpar[2]=flange[2];
gMC->Gsvolu("QFL3", "TUBE", idtmed[2018], flange, 3);
gMC->Gsvolu("VAC9", "TUBE", idtmed[2015], vacpar, 3);
gMC->Gspos("VAC9", 1, "QFL3", 0., 0., 0., 0, "ONLY");
gMC->Gspos("QFL3", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
//Total of 3150 mm from vertex on the negative side upto this point.
// SS tube 20.0 cm long, 0.15 cm thick, 5.8 cm ID, to support vac. pump
sspar[0]=0.0;
sspar[1]=3.05;
sspar[2]=10.0;
zpos = zpos - flange[2] - sspar[2];
vacpar[0]=0.0;
vacpar[1]=2.9;
vacpar[2]=sspar[2];
gMC->Gsvolu("QSS5", "TUBE", idtmed[2018], sspar, 3);
gMC->Gsvolu("VA10", "TUBE", idtmed[2015], vacpar, 3);
gMC->Gspos("VA10", 1, "QSS5", 0., 0., 0., 0, "ONLY");
gMC->Gspos("QSS5", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
//
// last item, undulated SS beam pipe, pitch=0.25, length= 342.0 cm
// material thickness 0.015 cm, ID=6.0 cm,
// zundul=171.0, thick=0.015, rundul=3.0
pitch=0.25;
thick=0.015;
zundul=171;
rundul=3.0;
Undulation("UNDL",pitch,thick,zundul,rundul,cn48);
//
zpos = zpos - sspar[2] - zundul;
gMC->Gspos("UNDL", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
//
gMC->Gspos("QQMO", 1, "ALIC", 0., 0., 0.1, 0, "ONLY");
// total of 6770 mm length upto this point, end of undulated beam
// pipe section.
// SS flange 22*2 mm thick
flange[0]=0.0;
flange[1]=6.3;
flange[2]=2.2;
zpos = zpos - zundul - flange[2];
vacpar[0]=0.0;
vacpar[1]=2.9;
vacpar[2]=flange[2];
gMC->Gsvolu("QFL4", "TUBE", idtmed[2018], flange, 3);
gMC->Gsvolu("VC11", "TUBE", idtmed[2015], vacpar, 3);
gMC->Gspos("VC11", 1, "QFL4", 0., 0., 0., 0, "ONLY");
gMC->Gspos("QFL4", 1, "QQMO", 0., 0., zpos, 0, "ONLY");
}
//_____________________________________________________________________________
void AliPIPEv3::DrawModule()
{
//
// Draw a shaded view of the Beam Pipe
//
// Set everything unseen
gMC->Gsatt("*", "seen", -1);
//
// Set ALIC mother transparent
gMC->Gsatt("ALIC","SEEN",0);
//
// Set the volumes visible
gMC->Gsatt("QQMO","seen",1);
gMC->Gsatt("QQBE","seen",1);
gMC->Gsatt("QFL1","seen",1);
gMC->Gsatt("QQAL","seen",1);
gMC->Gsatt("QSS1","seen",1);
gMC->Gsatt("QFL2","seen",1);
gMC->Gsatt("QSS2","seen",1);
gMC->Gsatt("QSS3","seen",1);
gMC->Gsatt("QSS4","seen",1);
gMC->Gsatt("QFL3","seen",1);
gMC->Gsatt("QSS5","seen",1);
gMC->Gsatt("BELO","seen",1);
gMC->Gsatt("UNDL","seen",1);
//
gMC->Gdopt("hide", "on");
gMC->Gdopt("shad", "on");
gMC->Gsatt("*", "fill", 7);
gMC->SetClipBox(".");
gMC->SetClipBox("*", 0, 3000, -3000, 3000, -6000, 6000);
gMC->DefaultRange();
gMC->Gdraw("alic", 40, 30, 0, 3, 5, .04, .04);
gMC->Gdhead(1111, "Beam Pipe");
gMC->Gdman(16, 6, "MAN");
gMC->Gdopt("hide","off");
}
//_____________________________________________________________________________
void AliPIPEv3::CreateMaterials()
{
//
// Create materials for beam pipe
//
Int_t ISXFLD = gAlice->Field()->Integ();
Float_t SXMGMX = gAlice->Field()->Max();
Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
Float_t zsteel[4] = { 26.,24.,28.,14. };
Float_t wsteel[4] = { .715,.18,.1,.005 };
Float_t epsil, stmin, tmaxfd, deemax, stemax;
// STEEL
// --- Define the various materials for GEANT ---
AliMaterial(5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
AliMaterial(4, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 18.5);
AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500);
AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
// ****************
// Defines tracking media parameters.
// Les valeurs sont commentees pour laisser le defaut
// a GEANT (version 3-21, page CONS200), f.m.
epsil = .001; // Tracking precision,
stemax = -1.; // Maximum displacement for multiple scat
tmaxfd = -20.; // Maximum angle due to field deflection
deemax = -.3; // Maximum fractional energy loss, DLS
stmin = -.8;
// Air
AliMedium(15, "AIR_L3_US", 15, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
// Beryllium
AliMedium(5, "BE_L3_US", 5, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
// Aluminium
AliMedium(4, "AL_L3_US", 4, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
// Vacuum
AliMedium(16, "VA_L3_US", 16, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
// Steel
AliMedium(19, "ST_L3_US", 19, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
}
//
void AliPIPEv3::Undulation(char *undul, Float_t pitch, Float_t thick,
Float_t zundul, Float_t rundul, char (*cone)[5])
{
//
// RUNDUL : Internal radius of the undulated chamber
// THICK : material thickness
// PITCH : one-QUARTER wave of undulation (cm)
// ZUNDUL : half length (cm)
//
// The undulated structure is desgned as a superposition of eight CONES
// of suitable sizes, where the inner/outer radius of the cone increases,
// then decreases, each half of the wave is assumed to be a semicircle,
// which allows to calculate the thickness and the radii of the cone, by
// dividing the semicircle into 4 parts of equal arc length.
// Thus apear the constants 0.293 and 0.707.
//
const Float_t const1 = .293;
const Float_t const2 = .707;
// Local variables
Int_t j, nwave;
Float_t dcone1[5], dcone2[5], dcone3[5], dcone4[5], dcone5[5],
dcone6[5], dcone7[5], dcone8[5];
Float_t xc, yc, zc, dundul[3];
Int_t *idtmed = fIdtmed->GetArray()-1999;
// Function Body
dcone1[0] = const1 * pitch / 2;
dcone1[1] = rundul;
dcone1[2] = dcone1[1] + thick;
dcone1[3] = dcone1[1] + const2 * pitch;
dcone1[4] = dcone1[3] + thick;
dcone2[0] = const2 * pitch / 2;
dcone2[1] = dcone1[3];
dcone2[2] = dcone1[4];
dcone2[3] = dcone2[1] + const1 * pitch;
dcone2[4] = dcone2[3] + thick;
dcone3[0] = dcone2[0];
dcone3[1] = dcone2[3];
dcone3[2] = dcone2[4];
dcone3[3] = dcone2[1];
dcone3[4] = dcone2[2];
dcone4[0] = dcone1[0];
dcone4[1] = dcone1[3];
dcone4[2] = dcone1[4];
dcone4[3] = dcone1[1];
dcone4[4] = dcone1[2];
dcone5[0] = dcone1[0];
dcone5[1] = dcone1[1] - thick;
dcone5[2] = dcone1[1];
dcone5[3] = dcone5[1] - const2 * pitch;
dcone5[4] = dcone5[3] + thick;
dcone6[0] = dcone2[0];
dcone6[1] = dcone5[3];
dcone6[2] = dcone5[4];
dcone6[3] = dcone6[1] - const1 * pitch;
dcone6[4] = dcone6[3] + thick;
dcone7[0] = dcone6[0];
dcone7[1] = dcone6[3];
dcone7[2] = dcone6[4];
dcone7[3] = dcone5[3];
dcone7[4] = dcone5[4];
dcone8[0] = dcone5[0];
dcone8[1] = dcone7[3];
dcone8[2] = dcone7[4];
dcone8[3] = dcone5[1];
dcone8[4] = dcone5[2];
gMC->Gsvolu(cone[0], "CONE", idtmed[2015], dcone1, 5);
gMC->Gsvolu(cone[1], "CONE", idtmed[2015], dcone2, 5);
gMC->Gsvolu(cone[2], "CONE", idtmed[2015], dcone3, 5);
gMC->Gsvolu(cone[3], "CONE", idtmed[2015], dcone4, 5);
gMC->Gsvolu(cone[4], "CONE", idtmed[2015], dcone5, 5);
gMC->Gsvolu(cone[5], "CONE", idtmed[2015], dcone6, 5);
gMC->Gsvolu(cone[6], "CONE", idtmed[2015], dcone7, 5);
gMC->Gsvolu(cone[7], "CONE", idtmed[2015], dcone8, 5);
gMC->Gsatt(cone[0], "SEEN", 0);
gMC->Gsatt(cone[1], "SEEN", 0);
gMC->Gsatt(cone[2], "SEEN", 0);
gMC->Gsatt(cone[3], "SEEN", 0);
gMC->Gsatt(cone[4], "SEEN", 0);
gMC->Gsatt(cone[5], "SEEN", 0);
gMC->Gsatt(cone[6], "SEEN", 0);
gMC->Gsatt(cone[7], "SEEN", 0);
// DEFINE AN IMAGINARY TUBE VOLUME FOR UNDULATED CHAMBER, FILL WITH VACUUM
nwave = Int_t (zundul / (pitch * 2) + .1);
dundul[2] = pitch * 2 * nwave;
dundul[1] = rundul + pitch + thick * 2;
//
dundul[0] = 1e-4;
gMC->Gsvolu(undul, "TUBE", idtmed[2015], dundul, 3);
xc = 0;
yc = 0;
zc = -dundul[2] + dcone1[0];
for (j = 1; j <= nwave; ++j) {
gMC->Gspos(cone[0], j, undul, xc, yc, zc, 0, "ONLY");
zc = zc + dcone1[0] + dcone2[0];
gMC->Gspos(cone[1], j, undul, xc, yc, zc, 0, "ONLY");
zc = zc + dcone2[0] + dcone3[0];
gMC->Gspos(cone[2], j, undul, xc, yc, zc, 0, "ONLY");
zc = zc + dcone3[0] + dcone4[0];
gMC->Gspos(cone[3], j, undul, xc, yc, zc, 0, "ONLY");
zc = zc + dcone4[0] + dcone5[0];
gMC->Gspos(cone[4], j, undul, xc, yc, zc, 0, "ONLY");
zc = zc + dcone5[0] + dcone6[0];
gMC->Gspos(cone[5], j, undul, xc, yc, zc, 0, "ONLY");
zc = zc + dcone6[0] + dcone7[0];
gMC->Gspos(cone[6], j, undul, xc, yc, zc, 0, "ONLY");
zc = zc + dcone7[0] + dcone8[0];
gMC->Gspos(cone[7], j, undul, xc, yc, zc, 0, "ONLY");
zc = zc + dcone8[0] + dcone1[0];
}
}