Recent progress in linear and nonlinear studies of toroidal Alfven eigenmode

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TAE modes are studied in linear and nonlinear regimes using several kinetic/MHD hybrid models. It is shown that the stability of TAE mode is largely determined by its radial mode structure. The calculated stability thresholds are correlated well with observations, including the recently observed alpha-driven TAE modes in the TFTR DT experiments. In the nonlinear regime, quasilinear simulations with multiple modes show that the saturation level is enhanced by nonlinear wave-particle resonance overlapping when the linear growth rate exceeds a critical value. A fully self-consistent {delta}f noise reduction method for the 3D particle/MHD hybrid model is developed.

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10 p.

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Fu, G.Y.; Chen, Y. & Budny, R. May 1, 1997.

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Description

TAE modes are studied in linear and nonlinear regimes using several kinetic/MHD hybrid models. It is shown that the stability of TAE mode is largely determined by its radial mode structure. The calculated stability thresholds are correlated well with observations, including the recently observed alpha-driven TAE modes in the TFTR DT experiments. In the nonlinear regime, quasilinear simulations with multiple modes show that the saturation level is enhanced by nonlinear wave-particle resonance overlapping when the linear growth rate exceeds a critical value. A fully self-consistent {delta}f noise reduction method for the 3D particle/MHD hybrid model is developed.

Physical Description

10 p.

Notes

Also available from the following url: http://www.pppl.gov. See PPPL reports section for full text.; OSTI as DE97052375

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  • Other Information: PBD: [1997]

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  • Other: DE97052375
  • Report No.: PPPL--3223
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/304211 | External Link
  • Office of Scientific & Technical Information Report Number: 304211
  • Archival Resource Key: ark:/67531/metadc679954

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  • May 1, 1997

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  • July 25, 2015, 2:20 a.m.

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  • April 15, 2016, 8:07 p.m.

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Fu, G.Y.; Chen, Y. & Budny, R. Recent progress in linear and nonlinear studies of toroidal Alfven eigenmode, report, May 1, 1997; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc679954/: accessed April 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.