Generation of Alfven Waves Due to Thermal Modulation of the Electrical Conductivity,
CALIFORNIA UNIV LOS ANGELES CENTER FOR PLASMA PHYSICS AND FUSION ENGINEERING
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An analytic study is made of the effects produced by a localized modulation of the electrical conductivity of a magnetized plasma carrying a field aligned current. The modulation is assumed to be caused by a heating source external to the plasma. The formulation used is applicable to modulation frequencies, omega, below the ion cyclotron frequency omega sub ci, and permits the calculation of the radiation pattern which contains shear as well as compressional Alfven modes, and near fields. For omegaomega sub ci 1, the radiation appears primarily in the form of a highly collimated shear mode travelling along the field lines passing through the spot where the modulation occurs. Author.
- Electricity and Magnetism
- Plasma Physics and Magnetohydrodynamics