Novel Turbulence Trigger for Neoclassical Tearings Mode in Tokamaks

Sanae I. Itoh, Kimitaka Itoh, Masatoshi Yagi

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

A stochastic trigger by microturbulence for a neoclassical tearing mode (NTM) is studied. The NTM induces a topological change of magnetic structure and has a subcritical nature. The transition rate of the probability density function for and statistically averaged amplitude of the NTM are obtained. The boundary in the phase diagram is determined as the statistical long time average of the transition conditions. The NTM can be excited by crossing this boundary even in the absence of other global instabilities.

Original languageEnglish
JournalPhysical review letters
Volume91
Issue number4
DOIs
Publication statusPublished - Jul 24 2003

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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