Current-Drive Efficiency in a Degenerate Plasma

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a degenerate plasma, the rates of electron processes are much smaller than the classical model would predict, affecting the efficiencies of current generation by external non-inductive means, such as by electromagnetic radiation or intense ion beams. For electron-based mechanisms, the current-drive efficiency is higher than the classical prediction by more than a factor of 6 in a degenerate hydrogen plasma, mainly because the electron-electron collisions do not quickly slow down fast electrons. Moreover, electrons much faster than thermal speeds are more readily excited without exciting thermal electrons. In ion-based mechanisms of current drive, the efficiency is likewise enhanced due to ... continued below

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5002-4

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Fisch, S. Son and N.J. November 1, 2005.

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a degenerate plasma, the rates of electron processes are much smaller than the classical model would predict, affecting the efficiencies of current generation by external non-inductive means, such as by electromagnetic radiation or intense ion beams. For electron-based mechanisms, the current-drive efficiency is higher than the classical prediction by more than a factor of 6 in a degenerate hydrogen plasma, mainly because the electron-electron collisions do not quickly slow down fast electrons. Moreover, electrons much faster than thermal speeds are more readily excited without exciting thermal electrons. In ion-based mechanisms of current drive, the efficiency is likewise enhanced due to the degeneracy effects, since the electron stopping power on slow ion beams is significantly reduced.

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5002-4

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  • Journal Name: Physical Review Letters; Journal Volume: 95; Journal Issue: 22

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  • Report No.: PPPL-4130
  • Grant Number: AC02-76CH0-3073, DE-FG02-05ER54838
  • DOI: 10.1103/PhysRevLett.95.225002 | External Link
  • Office of Scientific & Technical Information Report Number: 934519
  • Archival Resource Key: ark:/67531/metadc897974

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Office of Scientific & Technical Information Technical Reports

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  • November 1, 2005

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 18, 2016, 10 p.m.

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Fisch, S. Son and N.J. Current-Drive Efficiency in a Degenerate Plasma, article, November 1, 2005; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc897974/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.