## The Quadrupole Magnet as a Focusing Device |

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### Contents

F The Magnetization Curve | 54 |

TABLE PAGE | 56 |

IVf Reference quantities used in obtaining | 62 |

3 other sections not shown

### Common terms and phrases

achromatic translation system amperes Amperian force angle changes APPENDIX axial beam translation system calculated Chapter coincide component computed considered cross-hairs current-carrying wire defined defocusing determined distance electron beam entrance pole face equations error exit face expression field plot focal length focal point focusing focal focusing plane force due function Hence high energy horizontal plane ideal region inches line current Linear Accelerator magnet center magnet constants magnet current magnetic axis magnetic boundary magnetic field magnetic lenses magnetic potential magnetization curve magnification magnitude Mark III Linear measurements method microscope misaligned parallel-axis trajectories parameters particle rigidity particle trajectory plane of quadrupole pole end potential pulley quadru quadrupole field quadrupole magnet quadrupole Q15A quantities reference trajectory result space charge spherical aberration stream function strong-focusing Table V-6 tension thin lens transverse unit vector vertical plane vise wedge magnet wedge normal wire path zero zx plane