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Electron velocity diffusion in strong turbulence

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4 Author(s)
Hirose, A. ; Plasma Phys. Lab., Univ. of Saskatchewan, Saskatoon, Sask., Canada ; Edler, K. ; Bolster, E. ; Ishihara, O.

Velocity diffusion of electrons placed in strong Langmuir turbulence has been numerically investigated. The velocity variance initially exhibits quasi-linear behavior followed by non-Markovian subdiffusive phase in agreement with the previous theoretical predictions. However, the subdiffusive phase is also transient and a well defined diffusive phase with a constant diffusivity emerges. The asymptotic diffusivity scales as √σ where σ is the RMS amplitude of the turbulent electric potential.

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Plasma Science, IEEE Transactions on  (Volume:31 ,  Issue: 1 )