Simulation of Alfven wave-resonant particle interaction

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Description

New numerical simulations are presented on the self-consistent dynamics of energetic particles and a set of unstable discrete shear Alfven modes in a tokamak. Our code developed for these simulations has been previously tested in the simulations of the bump-on-tail instability model. The code has a Hamiltonian structure for the mode-particle coupling, with the superimposed wave damping, particle source and classical relaxation processes. In the alpha particle-Alfven wave problem, we observe a transition from a single mode saturation to the mode overlap and global quasilinear diffusion, which is qualitatively similar to that observed in the bump-on-tail model. We demonstrate a ... continued below

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22 p.

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Berk, H.L.; Breizman, B.N. & Pekker, M. July 1, 1995.

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Description

New numerical simulations are presented on the self-consistent dynamics of energetic particles and a set of unstable discrete shear Alfven modes in a tokamak. Our code developed for these simulations has been previously tested in the simulations of the bump-on-tail instability model. The code has a Hamiltonian structure for the mode-particle coupling, with the superimposed wave damping, particle source and classical relaxation processes. In the alpha particle-Alfven wave problem, we observe a transition from a single mode saturation to the mode overlap and global quasilinear diffusion, which is qualitatively similar to that observed in the bump-on-tail model. We demonstrate a considerable enhancement in the wave energy due to the resonance overlap. We also demonstrate the effect of global diffusion on the energetic particle losses.

Physical Description

22 p.

Notes

INIS; OSTI as DE95016689

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  • Other Information: PBD: Jul 1995

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  • Other: DE95016689
  • Report No.: DOE/ET/53088--713
  • Report No.: IFSR--713
  • Grant Number: FG05-80ET53088
  • DOI: 10.2172/101183 | External Link
  • Office of Scientific & Technical Information Report Number: 101183
  • Archival Resource Key: ark:/67531/metadc621419

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Creation Date

  • July 1, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Aug. 10, 2016, 2:15 p.m.

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Berk, H.L.; Breizman, B.N. & Pekker, M. Simulation of Alfven wave-resonant particle interaction, report, July 1, 1995; Austin, Texas. (digital.library.unt.edu/ark:/67531/metadc621419/: accessed September 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.