Finite pressure effects on sawtooth oscillations

• W. Park

  Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543

• D. A. Monticello

  Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543

• E. Fredrickson

  Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543

• K. McGuire

  Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543

抄録

Nonlinear 3-D simulation of sawtooth oscillations shows that the helically twisted hot spot has a prominent toroidal bulge at the large major radius side, characteristic of a high-εβp instability. This bulge drives other m/n islands just outside the mixing radius resulting in a stochastic annular region. A similar effect is also found in shaped plasmas, even at low beta. These effects agree with experimental data, giving detailed support to the Kadomtsev reconnection model. This effect can also be used to explain the experimental sawtooth heat pulse ‘‘anomaly.’’ At high εβp, the stochastic region can essentially fill the whole plasma, and can result in a ‘‘high-beta disruption.’’

収録刊行物

• Physics of Fluids B: Plasma Physics

  Physics of Fluids B: Plasma Physics 3 (3), 507-510, 1991-03-01

  AIP Publishing

キーワード

• Fluid Flow and Transfer Processes
• General Physics and Astronomy
• Mechanics of Materials
• Condensed Matter Physics
• Computational Mechanics

詳細情報

• CRID: 1363107370347028096
• NII論文ID: 30015999182
• DOI: 10.1063/1.859899
• ISSN: 08998221
• Web Site: https://pubs.aip.org/aip/pfb/article-pdf/3/3/507/12261352/507_1_online.pdf
• データソース種別:
  • Crossref
  • CiNii Articles