Short Scale Turbulent Fluctuations Driven by Electron Temperature Gradient in NSTX
Authors: E. Mazzucato, D.R. Smith, R.E. Bell, S.M. Kaye, J.C. Hosea, B.P. LeBlanc, J.R. Wilson, P.M. Ryan, C.W. Domier, N.C. Luhmann, Jr., H. Yuh, W. Lee, H. Park
Abstract:
Measurements with coherent scattering of electromagnetic waves in plasmas of the National Spherical Torus Experiment indicate the existence of turbulent fluctuations in the range of wave numbers k⊥pe=0.1-0.4, corresponding to a turbulence scale length nearly equal to the collisionless skin depth. Experimental observations and agreement with numerical results from a linear gyrokinetic stability code support the conjecture that the observed turbulence is driven by the electron temperature gradient.
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Accepted to: Physical Review Letters MS:LS11347
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