Signal Propagation in Collisional Plasma with Negative Ions

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The transport of charged species in collisional currentless plasmas is traditionally thought of as a diffusion-like process. In this paper, it is demonstrated that, in contrast to two-component plasma, containing electrons and positive ions, the transport of additional ions in multi-species plasmas is not governed by diffusion, rather described by nonlinear convection. As a particular example, plasmas with the presence of negative ions have been studied. The velocity of a small perturbation of negative ions was found analytically and validated by numerical simulation. As a result of nonlinear convection, initially smooth ion density profiles break and form strongly inhomogeneous shock-like ... continued below

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580 Kilobytes pages

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Kaganovich, I.; Berezhnoi, S.V. & Shin, C.B. December 18, 2000.

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Description

The transport of charged species in collisional currentless plasmas is traditionally thought of as a diffusion-like process. In this paper, it is demonstrated that, in contrast to two-component plasma, containing electrons and positive ions, the transport of additional ions in multi-species plasmas is not governed by diffusion, rather described by nonlinear convection. As a particular example, plasmas with the presence of negative ions have been studied. The velocity of a small perturbation of negative ions was found analytically and validated by numerical simulation. As a result of nonlinear convection, initially smooth ion density profiles break and form strongly inhomogeneous shock-like fronts. These fronts are different from collisionless shocks and shocks in fully ionized plasma. The structure of the fronts has been found analytically and numerically.

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580 Kilobytes pages

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INIS; OSTI as DE00772260

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  • Other Information: PBD: 18 Dec 2000

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  • Report No.: PPPL-3528
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/772260 | External Link
  • Office of Scientific & Technical Information Report Number: 772260
  • Archival Resource Key: ark:/67531/metadc724862

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  • December 18, 2000

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  • Sept. 29, 2015, 5:31 a.m.

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  • April 18, 2016, 1:04 p.m.

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Kaganovich, I.; Berezhnoi, S.V. & Shin, C.B. Signal Propagation in Collisional Plasma with Negative Ions, report, December 18, 2000; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc724862/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.