Transport theory for energetic alpha particles and tolerable magnitude of error fields in tokamaks with broken symmetry

K. C. Shaing, C. T. Hsu

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

A transport theory for energetic fusion born alpha particles in tokamaks with broken symmetry has been developed. The theory is a generalization of the theory for neoclassical toroidal plasma viscosity for thermal particles in tokamaks. It is shown that the radial energy transport rate can be comparable to the slowing down rate for energetic alpha particles when the ratio of the typical magnitude of the perturbed magnetic field strength to that of the equilibrium magnetic field strength is of the order of 10-4 or larger. This imposes a constraint on the magnitude of the error fields in thermonuclear fusion reactors. The implications on stellarators as potential fusion reactors are also discussed.

Original languageEnglish
Article number033012
JournalNuclear Fusion
Volume54
Issue number3
DOIs
Publication statusPublished - 2014 Mar

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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