Anomalous resistivity resulting from MeV-electron transport in overdense plasma

Sentoku, Y. ; Mima, K. ; Kaw, P. ; Nishikawa, K. (2003) Anomalous resistivity resulting from MeV-electron transport in overdense plasma Physical Review Letters, 90 (15). 155001_1-155001_4. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v90/i15/e155001

Related URL: http://dx.doi.org/10.1103/PhysRevLett.90.155001

Abstract

Laser produced hot electron transport in an overdense plasma is studied by three-dimensional particle-in-cell simulations. Hot electron currents into the plasma generate neutralizing return currents in the cold plasma electrons, leading to a configuration which is unstable to electromagnetic Weibel and tearing instabilities. The resulting current filaments self-organize through a coalescence process finally settling into a single global current channel. The plasma return current experiences a strong anomalous resistivity due to diffusive flow of cold electrons in the magnetic perturbations. The resulting electrostatic field leads to an anomalously rapid stopping of fast MeV electrons (almost 3 orders of magnitude stronger than that through classical collisional effects).

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:25213
Deposited On:06 Dec 2010 13:43
Last Modified:03 Jun 2011 15:16

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