کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1769408 1020271 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Oblique aperiodic instability driven by cross-field current in space plasmas
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
Oblique aperiodic instability driven by cross-field current in space plasmas
چکیده انگلیسی
Electric currents across the magnetic field can occur in the solar atmosphere because of quasi-stationary magnetic shear, plasma non-uniformity, or MHD waves. We propose a new physical mechanism that can cause the anomalous dissipation of these currents and initiate energy release in solar plasmas. In the framework of linear kinetic theory, we show that the cross-field currents are unstable with respect to low-frequency perturbations. The instability growth rate is quite high, about 2% of the ion-cyclotron frequency when the differential electron/ion velocity is 0.2 of the ion thermal speed. We identify the unstable perturbations as degenerated ion-acoustic modes coupled with backward kinetic Alfvén modes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 37, Issue 3, 2006, Pages 625-629
نویسندگان
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