Marginal Stability of Ion-Acoustic Waves in a Weakly Collisional Two-Temperature Plasma Without a Current PDF Download
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Author: Bamandas Basu Publisher: ISBN: Category : Dielectrics Languages : en Pages : 24
Book Description
This report presents two important results for a weakly collisional, current-free, two-temperature electron-ion plasma: (1) that e-i collisions have an undamping effect on ion acoustic waves, and (2) that, for appropriate values of the plasma parameters, ion-acoustic waves become marginally stable. The results are based on the closed form solution for the dielectric function for the linearized Balescu-Lenard-Poisson kinetic equations. The weakly collisional ordering is necessary to obtain an iterative solution for the collisional dielectric function, imposes two independent restrictions on the parameters that characterize the plasma. The linearized Balescu-Lenard-Poisson equations are solved in the weakly collisional limit to show that ion-acoustic waves in a current-free plasma, which are Landau-damped in the absence of collisions, can become marginally stable due to the undamping effect of electron-ion (e-i) collisions. For sq rt.(T sub e0/T sub i0) “ (5/16) sq rt.(m sub i/m sub e), the e-i collisional undamping effect dominates the i-i, e-e, and i-e collisional effects, and marginal stability occurs when the collisional undamping rate balances the electron and ion Landau damping rates.
Author: Bamandas Basu Publisher: ISBN: Category : Dielectrics Languages : en Pages : 24
Book Description
This report presents two important results for a weakly collisional, current-free, two-temperature electron-ion plasma: (1) that e-i collisions have an undamping effect on ion acoustic waves, and (2) that, for appropriate values of the plasma parameters, ion-acoustic waves become marginally stable. The results are based on the closed form solution for the dielectric function for the linearized Balescu-Lenard-Poisson kinetic equations. The weakly collisional ordering is necessary to obtain an iterative solution for the collisional dielectric function, imposes two independent restrictions on the parameters that characterize the plasma. The linearized Balescu-Lenard-Poisson equations are solved in the weakly collisional limit to show that ion-acoustic waves in a current-free plasma, which are Landau-damped in the absence of collisions, can become marginally stable due to the undamping effect of electron-ion (e-i) collisions. For sq rt.(T sub e0/T sub i0) “ (5/16) sq rt.(m sub i/m sub e), the e-i collisional undamping effect dominates the i-i, e-e, and i-e collisional effects, and marginal stability occurs when the collisional undamping rate balances the electron and ion Landau damping rates.
Author: Astronomisches Rechen-Institut Publisher: Springer Science & Business Media ISBN: 3662123673 Category : Science Languages : en Pages : 1308
Book Description
From the reviews: "Astronomy and Astrophysics Abstracts has appeared in semi-annual volumes since 1969 and it has already become one of the fundamental publications in the fields of astronomy, astrophysics and neighbouring sciences. It is the most important English-language abstracting journal in the mentioned branches. ...The abstracts are classified under more than a hundred subject categories, thus permitting a quick survey of the whole extended material. The AAA is a valuable and important publication for all students and scientists working in the fields of astronomy and related sciences. As such it represents a necessary ingredient of any astronomical library all over the world." Space Science Reviews#1 "Dividing the whole field plus related subjects into 108 categories, each work is numbered and most are accompanied by brief abstracts. Fairly comprehensive cross-referencing links relevant papers to more than one category, and exhaustive author and subject indices are to be found at the back, making the catalogues easy to use. The series appears to be so complete in its coverage and always less than a year out of date that I shall certainly have to make a little more space on those shelves for future volumes." The Observatory Magazine#2
Author: Bamandas Basu
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Author: Astronomisches Rechen-Institut
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Author: Shawn Garrick Ohler