Ion Heating by Fast Particle Induced Alfvin Turbulence

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Description

A novel mechanism that directly transfers energy from Super-Alfvenic energetic ions to thermal ions in high-beta plasmas is described. The mechanism involves the excitation of compressional Alfvin eigenmodes (CAEs) in the frequency range with omega less than or approximately equal to omega(subscript ci). The broadband turbulence resulting from the large number of excited modes causes stochastic diffusion in velocity space, which transfers wave energy to thermal ions. This effect may be important on the National Spherical Torus Experiment (NSTX), and may scale up to reactor scenarios. This has important implications for low aspect ratio reactor concepts, since it potentially allows ... continued below

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514 Kilobytes pages

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Gates, D.; Gorelenkov, N. & White, and R.B. May 31, 2001.

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Description

A novel mechanism that directly transfers energy from Super-Alfvenic energetic ions to thermal ions in high-beta plasmas is described. The mechanism involves the excitation of compressional Alfvin eigenmodes (CAEs) in the frequency range with omega less than or approximately equal to omega(subscript ci). The broadband turbulence resulting from the large number of excited modes causes stochastic diffusion in velocity space, which transfers wave energy to thermal ions. This effect may be important on the National Spherical Torus Experiment (NSTX), and may scale up to reactor scenarios. This has important implications for low aspect ratio reactor concepts, since it potentially allows for the modification of the ignition criterion.

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514 Kilobytes pages

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INIS; OSTI as DE00786534

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  • Other Information: PBD: 31 May 2001

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  • Report No.: PPPL-3572
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/786534 | External Link
  • Office of Scientific & Technical Information Report Number: 786534
  • Archival Resource Key: ark:/67531/metadc722724

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Creation Date

  • May 31, 2001

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 15, 2016, 9:26 p.m.

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Gates, D.; Gorelenkov, N. & White, and R.B. Ion Heating by Fast Particle Induced Alfvin Turbulence, report, May 31, 2001; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc722724/: accessed August 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.