Fluctuation measurements at c/ωpe spatial scales in a tokamak

E. J. Haines, I. H. Tan, Stewart C. Prager

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5 Scopus citations

Abstract

Magnetic and electrostatic fluctuations have been measured at the short scale length of the collisionless skin depth (c/ωpe) using small magnetic and electrostatic probes in the Tokapole II tokamak [Nucl. Fusion 9, 1509 (1979)]. For certain conditions and at high frequency (the MHZ range), fluctuations are present at the c/ωpe scale, with significant amplitude variation in the range between c/ωpe and the ion gyroradius scale. Wavelength dependence is inferred from measurements with probes of varying sizes. The amplitude of the turbulence at the c/ωpe scale is smaller than the dominant low-frequency turbulence, and is thus not relevant to transport in Tokapole II. Comparison with theoretical treatments of c/ωpe turbulence is discussed.

Original languageEnglish (US)
Pages (from-to)1521-1528
Number of pages8
JournalPhysics of Plasmas
Volume2
Issue number5
DOIs
StatePublished - Jan 1 1995

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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