Bispectral analysis of density and potential fluctuations in a high neutral density cylindrical plasma

Tatsuya Kobayashi, Shigeru Inagaki, Hiroyuki Arakawa, Kunihiro Kamataki, Yoshihiko Nagashima, Takuma Yamada, Satoru Sugita, Masatoshi Yagi, Naohiro Kasuya, Akihide Fujisawa, Sanae I. Itoh, Kimitaka Itoh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The structure of fluctuations in the Large Mirror Device-Upgrade (LMD-U) depends on the neutral density. In this study, we focus on the high neutral density plasma in which the potential and density fluctuation waveforms are nontrigonometric functions similar to sawtooth waves, and peaks in the power spectrum lie along a straight line when plotted as frequency versus wavenumber. Two-dimentional auto and cross bispectral analyses of Ĩis and/or VÃf , which consider both the matching conditions for both the azimuthal wavenumber and the frequency, have been performed; significant couplings are observed at particular peak frequencies. Similarities and differences between the auto and cross bicoherence of Ĩis and/or VÃf are discussed.

Original languageEnglish
Article numberS2047
JournalPlasma and Fusion Research
Volume5
DOIs
Publication statusPublished - Jan 1 2010

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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