Thus, electrons try to diffuse radially more rapidly than ions;however, a radial potential builds up on a very short time scale to confine the electrons electrostatically and thereby keep the particle diffusion am bipolar. Nonetheless, this parallel electron diffusion process does cause net radial electron heat conduction through an ensemble of closely packed island structures. The heat conduction coefficient is estimated to be (3/16)(v + γ)δ2 , where v is the electron-ion collision frequency and y is the drift wave growth rate, or inverse island correlation time. Other effects that these magnetic flutters may have on plasma transport and runaway electron processes are also discussed.
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