Upper-hybrid and electron-cyclotron waves in a laboratory magnetoplasma: weak spatial dispersion and parametric effects

Mikhail V. Starodubtsev (1) , Alexander V. Kostrov (1)

1 Institute of Applied Physics of RAS

Radiation of short-wavelength plasma waves is studied in a cold (Te=0.5eV), large (1.2m length, 70 cm diameter), uniform, Maxwellian laboratory magnetoplasma in the upper-hybrid frequency range. Although the characteristic parameter of spatial dispersion b2=VTe2/c2 is very small (b2<10-6), dispersion characteristics of the upper hybrid plasma waves is found to be strongly modified by the thermal motion of plasma electrons. Indeed, the resonance cone-like dispersion of UH plasma waves has been observed only if the parameter range satisfies simultaneously two inequalities: wc

Mots clés: upper hybrid resonance; resonance cones; spatial dispersion; plasma waves

Domaines: Physique des plasmas [physics.plasm-ph]

Mikhail V. Starodubtsev, Alexander V. Kostrov. Upper-hybrid and electron-cyclotron waves in a laboratory magnetoplasma: weak spatial dispersion and parametric effects. 2004. ⟨hal-00001876v2⟩