کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1763399 1020001 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stability of the kinetic Alfven wave in a current-less plasma
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
Stability of the kinetic Alfven wave in a current-less plasma
چکیده انگلیسی

The two potential theory of Hasegawa has been used to derive the dispersion relation for the kinetic Alfven wave (KAW) in a plasma composed of hydrogen, oxygen and electrons. All three components have been modeled by ring distributions (obtained by subtracting two Maxwellian distributions with different temperatures) with the hydrogen and electrons drifting, respectively, with velocities VdH and Vde. For the most general case, the dispersion relation is a polynomial equation of order five; it reduces to a relation which supports only one mode when VdH = 0. For typical parameters at comet Halley, we find that both VdH and Vde can drive the wave unstable; the KAW is thus driven unstable in a current-less plasma. Such an instability was found for the ion acoustic wave by Vranjes et al. (2009).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 55, Issue 11, 1 June 2015, Pages 2519–2525
نویسندگان
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