| 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | //
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| 27 | //
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| 28 |
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| 29 | #include "globals.hh"
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| 30 |
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| 31 | #include "G4GeometryManager.hh"
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| 32 |
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| 33 | #include "F04GlobalField.hh"
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| 34 |
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| 35 | #include "F04FocusSolenoid.hh"
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| 36 | #include "F04SimpleSolenoid.hh"
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| 37 |
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| 38 | F04FocusSolenoid::F04FocusSolenoid(G4double Ba, G4double Bb, G4double fz,
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| 39 | G4LogicalVolume* lv,
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| 40 | G4ThreeVector c) : F04SimpleSolenoid(B1, fz, lv, c)
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| 41 |
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| 42 | {
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| 43 | B1 = Ba;
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| 44 | B2 = Bb;
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| 45 | Half = false;
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| 46 | }
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| 47 |
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| 48 | void F04FocusSolenoid::addFieldValue(const G4double point[4],
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| 49 | G4double field[6]) const
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| 50 | {
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| 51 | G4ThreeVector global(point[0],point[1],point[2]);
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| 52 |
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| 53 | G4ThreeVector local = global2local.TransformPoint(global);
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| 54 |
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| 55 | if (isOutside(local)) return;
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| 56 |
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| 57 | G4double length = ((F04SimpleSolenoid*)this)->getLength();
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| 58 |
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| 59 | G4double Bz = (B2-B1) * std::abs(local.z())/(length/2.) + B1;
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| 60 |
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| 61 | if (Half) { if (local.z() >= 0.) Bz = B1; }
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| 62 |
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| 63 | G4ThreeVector B(0.0,0.0,Bz);
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| 64 |
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| 65 | B = global2local.Inverse().TransformAxis(B);
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| 66 |
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| 67 | field[0] += B[0];
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| 68 | field[1] += B[1];
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| 69 | field[2] += B[2];
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| 70 | }
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