Electromagnetic Radiation: Variational Methods, Waveguides and Accelerators: Including Seminal Papers of Julian SchwingerJulian Schwinger was already the world’s leading nuclear theorist when he joined the Radiation Laboratory at MIT in 1943, at the ripe age of 25. Just 2 years earlier he had joined the faculty at Purdue, after a postdoc with OppenheimerinBerkeley,andgraduatestudyatColumbia. Anearlysemester at Wisconsin had con?rmed his penchant to work at night, so as not to have to interact with Breit and Wigner there. He was to perfect his iconoclastic 1 habits in his more than 2 years at the Rad Lab. Despite its deliberately misleading name, the Rad Lab was not involved in nuclear physics, which was imagined then by the educated public as a esoteric science without possible military application. Rather, the subject at hand was the perfection of radar, the beaming and re?ection of microwaves which had already saved Britain from the German onslaught. Here was a technology which won the war, rather than one that prematurely ended it, at a still incalculable cost. It was partly for that reason that Schwinger joined this e?ort, rather than what might have appeared to be the more natural project for his awesome talents, the development of nuclear weapons at Los Alamos. He had got a bit of a taste of that at the “Metallurgical Laboratory” in Chicago, and did not much like it. Perhaps more important for his decision to go to and stay at MIT during the war was its less regimented and isolated environment. |
Contents
Spherical Harmonics | 45 |
Relativistic Transformations | 65 |
Transmission Lines | 97 |
Copyright | |
28 other sections not shown
Other editions - View all
Electromagnetic Radiation: Variational Methods, Waveguides and Accelerators ... Kimball Milton,Julian Schwinger No preview available - 2010 |
Common terms and phrases
amplitude angle angular aperture field approximation arbitrary asymptotic Bessel functions boundary condition Chap characteristic impedance charge circular guide coefficient consider constant coordinates corresponding cross section cutoff wavelength cutoff wavenumber defined derived differential diffraction discontinuity dominant mode E-mode eigenfunctions eigenvalue electric and magnetic electric field electromagnetic electron energy expression f(dr field components frequency Green's function H mode H₂ harmonic Hence incident infinite integral equation Julian Schwinger linear magnetic field matrix Maxwell equations mode functions normal obtained orthogonal particle plane wave potential problem propagation quantities quantum radius region relation result S₁ satisfy scalar Schwinger screen sin² solution stationary surface synchrotron tangential theorem tion transformation transmission line transverse vanishes variational principle vector velocity voltage wave equation waveguide wavenumber zero θω