Electron Gyro-scale Fluctuation Measurements in National Spherical Torus Experiment H-mode Plasmas
Authors: D.R. Smith, S.M. Kaye, W. Lee, E. Mazzucato, H.K. Park, R.E. Bell, C.W. Domier, B.P. LeBlanc, F.M. Levinton, N.C. Luhmann, Jr., J.E. Menard, and H. Yuh
Abstract:
A collective scattering system has measured electron gyro-scale fluctuations in National Spherical Torus Experiment (NSTX) H-mode plasmas to investigate electron temperature gradient (ETG) turbulence. Observations and results pertaining to fluctuation measurements in ETGstable regimes, the toroidal field scaling of fluctuation amplitudes, the relation between between fluctuation amplitudes and transport quantities, and fluctuation magnitudes and k-spectra are presented. Collectively, the measurements provide insight and guidance for understanding ETG turbulence and anomalous electron thermal transport.
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Submitted to: Physics of Plasmas (August 2009)
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Download PPPL-4430 (pdf 2.06 MB 16 pp)
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