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CCalMagneticField.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file CCalMagneticField.cc
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//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// File: CCalMagneticField.cc
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// Description: User Field class implementation.
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#include <fstream>
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#include "
CCalMagneticField.hh
"
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#include "
CCalutils.hh
"
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#include "
G4SystemOfUnits.hh
"
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#include "
G4FieldManager.hh
"
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//#define ddebug
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//#define debug
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//Constructor and destructor:
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CCalMagneticField::CCalMagneticField
(
const
G4String
&
filename
) :
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fval(0),
pos
(0), slope(0), intercept(0)
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{
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#ifdef debug
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fVerbosity
= 1;
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#else
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fVerbosity
= 0;
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#endif
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//Let's open the file
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G4cout
<<
" ==> Opening file "
<< filename <<
" to read magnetic field..."
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<<
G4endl
;
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G4String
pathName = std::getenv(
"CCAL_GLOBALPATH"
);
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std::ifstream is;
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G4bool
ok =
openGeomFile
(is, pathName, filename);
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if
(ok) {
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findDO
(is,
G4String
(
"FLDM"
));
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is >>
fval
>>
npts
>>
xoff
;
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if
(
fVerbosity
)
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G4cout
<<
"Field value "
<<
fval
<<
" # points "
<<
npts
<<
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" offset in x "
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<< xoff*
mm
<<
G4endl
;
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if
(
npts
> 0) {
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pos
=
new
G4double
[
npts
];
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slope
=
new
G4double
[
npts
];
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intercept
=
new
G4double
[
npts
];
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for
(
G4int
i = 0; i <
npts
; i++) {
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is >>
pos
[i] >>
slope
[i] >>
intercept
[i];
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if
(
fVerbosity
)
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G4cout
<<
tab
<<
"Position "
<< i <<
" "
<<
pos
[i] <<
" Slope "
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<<
slope
[i] <<
" Intercept "
<< intercept[i] <<
G4endl
;
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}
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}
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// Close the file
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G4cout
<<
" ==> Closing file "
<< filename <<
G4endl
;
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is.close();
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}
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}
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CCalMagneticField::~CCalMagneticField
() {
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if
(
pos
)
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delete
[]
pos
;
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if
(
slope
)
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delete
[]
slope
;
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if
(
intercept
)
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delete
[]
intercept
;
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}
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// Member functions
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void
CCalMagneticField::MagneticField
(
const
G4double
x
[3],
G4double
B
[3])
const
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{
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G4int
i=0;
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for
(i=0; i<2; i++) {
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B[i] = 0*
kilogauss
;
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}
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G4double
m1=0;
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G4double
c1
=0;
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G4double
xnew = x[0]/
mm
+
xoff
;
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if
(
npts
> 0) {
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for
(i=0; i<
npts
; i++) {
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if
(xnew >
pos
[i]*
mm
) {
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m1 =
slope
[i];
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c1 =
intercept
[i];
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}
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}
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}
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G4double
scor = c1 +
m
*xnew;
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if
(scor < 0.) scor = 0.;
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if
(scor > 1.) scor = 1.0;
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B[2] = scor*
fval
*
kilogauss
;
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if
(
fVerbosity
)
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{
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G4cout
<<
"Field at x: "
<< x[0]/
mm
<<
"mm ("
<< xnew <<
") = "
<<
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B[2]/
tesla
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<<
"T (m = "
<< m1 <<
", c = "
<<
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c1 <<
", scale = "
<< scor <<
")"
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<<
G4endl
;
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}
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}
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CLHEP::Hep3Vector
CCalMagneticField::
136
MagneticField
(
const
CLHEP::Hep3Vector
point
)
const
{
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G4double
x
[3],
B
[3];
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CLHEP::Hep3Vector
v
;
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x[0] = point.
x
();
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x[1] = point.
y
();
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x[2] = point.
z
();
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CCalMagneticField::MagneticField
(x, B);
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v.
setX
(B[0]);
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v.
setY
(B[1]);
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v.
setZ
(B[2]);
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return
v
;
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}
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void
CCalMagneticField::GetFieldValue
(
const
G4double
x
[3],
G4double
*
B
)
const
{
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CCalMagneticField::MagneticField
(x, B);
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}
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geant4
tree
geant4-10.6-release
examples
advanced
composite_calorimeter
src
CCalMagneticField.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:24:56
using
1.8.2 with
ECCE GitHub integration