The present volume comprehensively summarizes the late Julian Schwinger's work on the theory of electromagnetic radiation and its application to waveguides, transmission lines, accelerator physics and synchrotron radiation. The first part, written in textbook style, has grown out of lectures and manuscripts by Julian Schwinger prepared during the war at MIT's Radiation Laboratory, updated with material developed by Schwinger at UCLA in the 1970s and 1980s, and by Milton at the University of Oklahoma since 1994. The second part consists of reprints of more than 15 papers (some of them never published or available with very limited circulation) by Schwinger on these topics. This volume will be of great interest to physicists, electrical engineers and applied mathematicians whether they be students or seasoned professionals. A paperback study edition of the first part is available separately.
A Treatise on Radiation Theory.- Maxwell’s Equations.- Spherical Harmonics.- Relativistic Transformations.- Variational Principles for Harmonic Time Dependence.- Transmission Lines.- Waveguides and Equivalent Transmission Lines.- Rectangular and Triangular Waveguides.- Electromagnetic Fields in Waveguides with Circular Cross Sections.- Reflection and Refraction.- Variational Methods.- Examples of Variational Calculations for Circular Guide.- Steady Currents and Dissipation.- The Impedance Concept in Waveguides.- Accelerators: Microtrons and Synchrotrons.- Synchrotron Radiation.- Diffraction.- Quantum Limitations on Microwave Oscillators.- Relevant Papers of Julian Schwinger.- On the Representation of the Electric and Magnetic Fields Produced by Currents and Discontinuities in Wave Guides. I.- Electron Orbits in the Synchrotron.- On Radiation by Electrons in a Betatron.- On the Classical Radiation of Accelerated Electrons.- The Quantum Correction in the Radiation by Energetic Accelerated Electrons.- Classical Radiation of Accelerated Electrons. II. A Quantum Viewpoint.- Classical and Quantum Theory of Synergic Synchrotron-?erenkov Radiation.- New Approach to Quantum Corrections in Synchrotron Radiation.- On the Radiation of Sound from an Unflanged Circular Pipe.- On the Theory of Diffraction by an Aperture in an Infinite Plane Screen. I.- On the Theory of Diffraction by an Aperture in an Infinite Plane Screen. II..- On the Transmission Coefficient of a Circular Aperture.- On the Theory of Electromagnetic Wave Diffraction by an Aperture in an Infinite Plane Conducting Screen.