Gyrokinetic simulation of internal kink modes

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Description

Internal disruption in a tokamak has been simulated using a three-dimensional magneto-inductive gyrokinetic particle code. The code operates in both the standard gyrokinetic mode (total-f code) and the fully nonlinear characteristic mode ({delta}f code). The latter, a recent addition, is a quiet low noise algorithm. The computational model represents a straight tokamak with periodic boundary conditions in the toroidal direction. The plasma is initially uniformly distributed in a square cross section with perfectly conducting walls. The linear mode structure of an unstable m = 1 (poloidal) and n = 1 (toroidal) kinetic internal kink mode is clearly observed, especially in ... continued below

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47 p.

Creation Information

Naitou, Hiroshi; Tsuda, Kenji; Lee, W.W. & Sydora, R.D. May 1, 1995.

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  • Naitou, Hiroshi
  • Tsuda, Kenji Yamaguchi Univ., Ube (Japan). Dept. of Electrical and Electronical Engineering
  • Lee, W.W. Princeton Univ., NJ (United States). Plasma Physics Lab.
  • Sydora, R.D. Univ. of California, Los Angeles, CA (United States). Dept. of Physics

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Description

Internal disruption in a tokamak has been simulated using a three-dimensional magneto-inductive gyrokinetic particle code. The code operates in both the standard gyrokinetic mode (total-f code) and the fully nonlinear characteristic mode ({delta}f code). The latter, a recent addition, is a quiet low noise algorithm. The computational model represents a straight tokamak with periodic boundary conditions in the toroidal direction. The plasma is initially uniformly distributed in a square cross section with perfectly conducting walls. The linear mode structure of an unstable m = 1 (poloidal) and n = 1 (toroidal) kinetic internal kink mode is clearly observed, especially in the {delta}f code. The width of the current layer around the x-point, where magnetic reconnection occurs, is found to be close to the collisionless electron skin depth. This is consistent with the theory in which electron inertia has a dominant role. The nonlinear behavior of the mode is found to be quite similar for both codes. Full reconnection in the Alfven time scale is observed along with the electrostatic potential structures created during the full reconnection phase. The E x B drift due to this electrostatic potential dominates the nonlinear phase of the development after the full reconnection.

Physical Description

47 p.

Notes

INIS; OSTI as DE95011714

Source

  • Other Information: PBD: May 1995

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  • Other: DE95011714
  • Report No.: PPPL--3101
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/61212 | External Link
  • Office of Scientific & Technical Information Report Number: 61212
  • Archival Resource Key: ark:/67531/metadc691229

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Creation Date

  • May 1, 1995

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

Description Last Updated

  • June 23, 2016, 4:35 p.m.

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Naitou, Hiroshi; Tsuda, Kenji; Lee, W.W. & Sydora, R.D. Gyrokinetic simulation of internal kink modes, report, May 1, 1995; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc691229/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.