Showing papers by "Benjamin Lax published in 1962"

High magnetic fields

Abstract: : Some 85 of the papers prepared for the first International Conference on High Magnetic Fields are published in this volume. These reports cover the most significant present work on the generation and use of very high or very special magnetic fields, including new solenoid designs for pulsed or continuous operation, developments in cryogenics, new generators and power supplies, new cooling systems for continuous-field coils, analyses and fabrication experiments on superconductive compounds and rare-earth alloys, continuing attacks on plasma-containment problems arising in controlled thermonuclear fusion research, and studies magnetic-shielding-system parameters for the protection of space travellers against high-energy radiation. The four parts of this volume cover: designs of high-field solenoids and supporting systems, high-field research programs now underway at laboratories around the world, application of high fields in solid-state and low-temperature physics, and use of high fields in plasma physics. References at the end of each paper constitute in sum the most complete bibliography of the field yet compiled.

Semiclassical Dispersion Theory of Interband Magneto-Optical Effects

Abstract: From the classical equation of motion a conductivity tensor is derived for a bound electron in a dc external magnetic field. Then the conductivity for a circularly polarized wave is obtained, which is expanded in terms of the magnetic field. With the appropriate form of the oscillator strength for the interband transitions, the conductivity components are evaluated for the zeroth, first, and second power of the magnetic field over the two energy bands for the direct and the indirect transitions. The results are used to obtain expressions for the interband Faraday rotation and the Voigt phase shift in the limits of $\ensuremath{\omega}l{\ensuremath{\omega}}_{g}$ and $\ensuremath{\omega}g{\ensuremath{\omega}}_{g}$, where $\ensuremath{\omega}$ is optical frequency and ${\ensuremath{\omega}}_{g}$ the frequency corresponding to the energy gap. In the latter case oscillatory behavior is described by the expression near the frequency of singularities with a loss term in the form of relaxation time $\ensuremath{\tau}$.

Cyclotron resonance and magneto-optical effects in semiconductors

Abstract: : Contents: Cyclotron resonance Theory and experiments Intraband magneto-optical phenomena Intraband tran itions Isotropic intraband magneto-optical effects Anisotropic intraband magneto-optical effects Interband magneto-optical phenomena Interband dispersion and absorption Interband transitions in a magnetic field Magnetoreflection Indirect transitions Interband Faraday rotation Interband Voigt effect Zeeman effect Zeeman effect of impurities Excitons

High Magnetic Field Research

Abstract: The use of high magnetic fields as a research tool for a wide variety of physical phenomena is clearly recognized today and the subject of an International Symposium at Cambridge this fall. Another important step in promoting research with the help of large magnetic fields has been the sponsorship of the M. I. T. National Magnet Laboratory by the Air Force. This paper will review the highlights of the conference which included papers on research in plasma physics, low temperatures, solid state and the latest developments for generating high magnetic fields. The plans and objectives of the National Magnet Laboratory and description of the physical facilities will be presented. In addition, a brief review will be given of a number of experiments already performed in the existing Magnet Laboratory at M. I. T.