Abstract
Non-linear large amplitude ion wave excitation by short microwave pulse at the resonance absorption region has been observed. The maximum amplitude of the wave is δn/n ≈ 40% in peak-to-peak, when a short microwave pulse of the order of or less than a period of ion oscillation (τi = 2π/ωpi) is used. The excited wave propagates to lower density regions and its velocity is a function of its amplitude, v ∝ (δn/n0)2.2–2.7. At the same time, a strong electron wave is excited after shut-off of the incident microwave pulse and high energy electrons are emitted and accelerated by the excited electron wave wakefield.
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