کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8142216 1523884 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the effects of suprathermal populations in dusty plasmas: The case of dust-ion-acoustic waves
ترجمه فارسی عنوان
در مورد اثرات جمعیت های پرطرفدار در پلاسما گرد و غبار: مورد امواج غبار یون-آکوستیک
کلمات کلیدی
پلاسما فضایی، گرد و خاک، جمعیت پرجمعیت توزیع کاپا، امواج،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فیزیک زمین (ژئو فیزیک)
چکیده انگلیسی
Suprathermal populations with energetic distributions deviating from a standard Maxwellian are ubiquitous in dusty plasmas from space environments, as a proof that these systems are out of thermal equilibrium. The excess of free energy may have important implications in the relaxation processes by the plasma waves and fluctuations, as well as in their dissipation. In order to emphasize the effects of suprathermal populations a new realistic interpretation is proposed on the basis of an advanced Kappa modeling in accord with the observations. This article is focused on the kinetic description of dust-modified ion acoustic (DIA) waves in the presence of Kappa-distributed (suprathermal) particles. Our methodology follows closely recent considerations on the structural characteristics of Kappa distributions, contrasting the high-energy tails enhanced by the suprathermal populations with the Maxwellian (thermal) core of the distribution. The effects on DIA waves are found to be highly dependent on the nature of suprathermal particles: both the wave-frequency and Landau damping rate are inhibited by the suprathermal electrons, while the suprathermal ions have an opposite influence.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Planetary and Space Science - Volume 156, July 2018, Pages 130-138
نویسندگان
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