On the bicoherence analysis of plasma turbulence

K. Itoh, Y. Nagashima, S. I. Itoh, P. H. Diamond, A. Fujisawa, M. Yagi, A. Fukuyama

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)


The bicoherence of fluctuations in a system of drift waves and zonal flows is discussed. In strong drift-wave turbulence, where broadband fluctuations are excited, the bicoherence is examined. A Langevin equation formalism of turbulent interactions allows us to relate the bicoherence coefficient to the projection of nonlinear force onto the test mode. The dependence of the summed bicoherence on the amplitude of zonal flows is clarified. The importance of observing biphase is also stressed. The results provide a basis for measurement of nonlinear interaction in a system of drift waves and zonal flow.

Original languageEnglish
Article number102301
Pages (from-to)1-9
Number of pages9
JournalPhysics of Plasmas
Issue number10
Publication statusPublished - 2005

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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