UW-CPTC 04-1 (Revised2) Most Electron Heat Transport Is Not Anomalous; It’s A Paleoclassical Process In Toroidal Plasmas
نویسنده
چکیده
Radial electron heat transport in low collisionality, magnetically-confined toroidal plasmas is shown to result from paleoclassical Coulomb collision processes (parallel electron heat conduction and magnetic field diffusion). In such plasmas the electron temperature is equilibrated along magnetic field lines a long length L (>> periodicity length πR0q), which is the minimum of the electron collision length and an effective field line length. Thus, diffusing field lines induce a radial electron heat diffusivity M ≡ L/(πR0q) ∼ 10 >> 1 times the magnetic field diffusivity η/μ0 ' νe(c/ωp).
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