Phys. Rev. Lett. 94, 055002 (2005) [4 pages]Most Electron Heat Transport Is Not Anomalous; It Is a Paleoclassical Process in Toroidal PlasmasReceived 9 February 2004; revised 20 April 2004; published 9 February 2005 It is hypothesized that radial electron heat transport in magnetically confined toroidal plasmas results 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 (≫ poloidal 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)2. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.055002
DOI:
10.1103/PhysRevLett.94.055002
PACS:
52.25.Fi, 52.35.Vd, 52.55.Dy, 52.55.Fa
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