Stellarator bootstrap current and plasma flow velocity at low collisionality

P. Helander, F. I. Parra, S. L. Newton

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The bootstrap current and flow velocity of a low-collisionality stellarator plasma are calculated. As far as possible, the analysis is carried out in a uniform way across all low-collisionality regimes in general stellarator geometry, assuming only that the confinement is good enough that the plasma is approximately in local thermodynamic equilibrium. It is found that conventional expressions for the ion flow speed and bootstrap current in the low-collisionality limit are accurate only in the -collisionality regime and need to be modified in the -regime. The correction due to finite collisionality is also discussed and is found to scale as.

Original languageEnglish (US)
Article number905830206
JournalJournal of Plasma Physics
Volume83
Issue number2
DOIs
StatePublished - Apr 1 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Keywords

  • fusion plasma
  • plasma confinement
  • plasma flows

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