Electrostatic Lens Systems,The use of electrostatic lenses for the control of ion and electron beams has grown considerably in recent years. In addition, innovations in the production of low energy positrons have opened a whole new field of research for which electrostatic lenses are required. Electrostatic Lens Systems is therefore a timely treatise on the practical aspects of lens system design. The text gives a clear and concise treatment of the motion of charged particles in electrostatic fields and describes several methods of calculating the potential and field distributions for various electrode geometries. Electrostatic Lens Systems is also intended to be an interactive tutor on the practical design and analysis of systems using round lenses (both apertures and cylinders) through a unique suite of programs (provided on IBM compatible disc). Combined with an emphasis on the Bessel function expansion method and a thorough description of the well known relaxation methods, this volume will be a significant reference work and learning tool for experienced workers and new researchers alike. If you need to use electrostatic lenses then you need to read Electrostatic Lens Systems. |
Contents
The Optics of Simple Lens Systems | 44 |
Aberrations | 64 |
The LENSYS Program | 83 |
Copyright | |
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Common terms and phrases
a₁ acceleration parameter adjusted angular magnification aperture lenses approximation array asymptotes axial potential behaviour Bessel function boundary C₁₁ calculation coefficient of spherical conjugate convergence crosses the axis curves Cylinder lenses data window defined diagram diameter disc electrode potentials ELECTROSTATIC LENS electrostatic lenses entrance pupil equipotential expressions F₁ F₂ focal lengths focal properties Gaussian image geometry give gradient H₁ image plane integration Laplace's equation Lens Data lens geometry lens system LENSYS program magnification matrix menu meridional rays mesh nodal object and image overall voltage ratio parallel paraxial particle Picht equation position potential distribution principal plane principal points principal rays R₁ R₂ radial ray crosses ray paths ray tracing reduced radius refractive indices regions Runge-Kutta method screen second focal point shows sign convention SIMION slope Snell's law space spherical aberration coefficient symmetry trajectory two-cylinder lens V₁ V₂ values write zero