Hot Plasma導波管内のDipole Filed

概要

論文の詳細を見る
The excitation of waves by an axially oriented electric dipole in a cylindrical waveguide is studied by using the linearized Vlasov equation. The waveguide is filled with a compressible plasma which is magnetized by strong longitudinal magnetic fields. The calculation is carried out in two cases : one is in the Maxwellian for the velocity distribution and the other in the shifted Maxwellian. In the latter case, a wave within a certain range for the phase velocity experiences more electrons overtaking than dropping behind himself, and therefore the wave will grow by withdrowing energy from those electrons. From eigenvalues of the wave equation in the waveguide, it is concluded that the wave excited by dipole can propagate at frequencies well below a cutoff frequency for the waveguide and at phase velocities much less than the light velocity. It is also concluded that the wave grows in the shifted Maxwellian distribution without the dipole excitation.
山梨大学の論文