Current Drive in Recombining Plasma

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The Langevin equations describing the average collisional dynamics of suprathermal particles in nonstationary plasma remarkably admit an exact analytical solution in the case of recombining plasma. The current density produced by arbitrary particle fluxes is derived including the effect of charge recombination. Since recombination has the effect of lowering the charge density of the plasma, thus reducing the charged particle collisional frequencies, the evolution of the current density can be modified substantially compared to plasma with fixed charge density. The current drive efficiency is derived and optimized for discrete and continuous pulses of current, leading to the discovery of a ... continued below

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Fisch, P.F. Schmit and N.J. May 15, 2012.

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Description

The Langevin equations describing the average collisional dynamics of suprathermal particles in nonstationary plasma remarkably admit an exact analytical solution in the case of recombining plasma. The current density produced by arbitrary particle fluxes is derived including the effect of charge recombination. Since recombination has the effect of lowering the charge density of the plasma, thus reducing the charged particle collisional frequencies, the evolution of the current density can be modified substantially compared to plasma with fixed charge density. The current drive efficiency is derived and optimized for discrete and continuous pulses of current, leading to the discovery of a nonzero "residual" current density that persists indefinitely under certain conditions, a feature not present in stationary plasmas.

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  • Physics of Plasmas (August 2011)

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  • Report No.: PPPL-4654
  • Grant Number: DE-ACO2-09CH11466
  • DOI: 10.2172/1062578 | External Link
  • Office of Scientific & Technical Information Report Number: 1062578
  • Archival Resource Key: ark:/67531/metadc844165

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  • May 15, 2012

Added to The UNT Digital Library

  • May 19, 2016, 9:45 a.m.

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  • July 18, 2016, 5:24 p.m.

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Fisch, P.F. Schmit and N.J. Current Drive in Recombining Plasma, report, May 15, 2012; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc844165/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.