DocumentCode :
1170739
Title :
Electron velocity diffusion in strong turbulence
Author :
Hirose, A. ; Edler, K. ; Bolster, E. ; Ishihara, O.
Author_Institution :
Plasma Phys. Lab., Univ. of Saskatchewan, Saskatoon, Sask., Canada
Volume :
31
Issue :
1
fYear :
2003
fDate :
2/1/2003 12:00:00 AM
Firstpage :
3
Lastpage :
6
Abstract :
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.
Keywords :
diffusion; plasma transport processes; plasma turbulence; turbulence; Langmuir turbulence; asymptotic diffusivity; asymptotic stage; binary collisions; charged particles; diffusive phase; electromagnetic turbulence; electron velocity diffusion; extended resonance broadening theory; kurtosis-like quantity; lowest order theory; nonMarkovian subdiffusive phase; numerical simulations; particle orbits; quasi-linear behavior; quasi-linear diffusion; quasi-linear theory; randomization; strong Langmuir turbulence; subdiffusive to diffusive phase transition mechanism; transient subdiffusive phase; velocity space; velocity variance; Chaos; Electric potential; Electromagnetic transients; Electrons; Equations; Numerical simulation; Physics; Resonance; Space heating; Testing;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/TPS.2003.809279
Filename :
1190962
Link To Document :
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