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Dr. Roy W. Gould Simon Ramo Professor of Engineering, Emeritus 134
Watson B.S.
- Caltech, 1949 |
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| Expertise Plasma physics, fusion energy, microwaves. Field of Study Our group's research is a mixture of experimental and computational plasma physics which emphasizes basic concepts. Prior work with students and colleagues has included: wave propagation and resonances in cylindrical plasma columns, beam-plasma interaction, Alfven wave propagation and ion cyclotron resonance, resonance cones in anisotropic plasmas, cyclotron and plasma wave echoes, microturbulence and transport in tokamak plasmas. We also have a continuing interest in microwave electronics. Principal areas of current research are: 1. Electron cyclotron resonance phenomena in pure electron plasmas: An experimental facility has been constructed to study electron cyclotron and upper hybrid resonance phenomena in cylindrical rotating pure electron plasmas. Of interest are the effects of the rotational Doppler shift, the sheared nature of the flow, electron temperature, collisionless and collisional damping, and wave-particle resonances. 2. Instabilities and mixing in pure electron plasmas: Cylindrical rotating plasmas are contained by a magnetic field and by axial electrostatic potentials. In general the rotational flow is sheared and, when the density profile is hollow, it is unstable. Computational studies of these instabilities and the dynamics of the mixing of the density/vorticity which ensues has been studied. When the density profile is monotonic, the flow is stable and initial disturbances are damped away by mixing associated with the shear. The properties of stationary rotating states of the plasma have also been studied.
Roy W. Gould, Thermal Excitation of Modes in a Non-Neutral Plasma, in Non-Neutral Plasma Physics IV, edited by Francois Anderegg et al., American Institute of Physics (2002). Roy W. Gould,
Wave Angular Momentum in Nonneutral Plasmas, CP498, Non-Neutral
Plasma Physics III, edited by John J. Bollinger et al., American Institute
of Physics (1999). |
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16 July, 2009
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