Plasma Oscillations in a Magnetic Field

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概要

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• In the presence of a uniform external magnetic field, the initial value problem for a longitudinal electron oscillation in a fully ionized plasma is treated in the range of the linear theory under the assumption that collisions are negligible and that the angle θ between wave vector and magnetic field is not equal to π/2, and Re(s) ≠ 0 on the complex s-plane. It is shown that, if we determine the indicial condition that the solution of initial value problem varies as exp (ik・γ + αt), where α is a complex valued frequency, then for Re(α) < 0 (damped wave) there appears an indeterminancy in the dispersion equation of the potential, and for Re(α) > 0 (amplified wave) each dispersion equation of the proper plasma oscillations, the perturbed velocity distribution function, and the potential are coincident. As a typical example, the case in which the equilibrium distribution is Maxwellian is discussed.

• 社団法人日本物理学会の論文
• 1960-10-05

著者

• Kaji Ikuo

  The Research Institute Of Applied Electricity Hokkaido University

• Kito Masafumi

  The Electrotechnical Laboratory

関連論文

• Plasma Oscillations in a Magnetic Field

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