Electron heat transport in a steep temperature gradient
作者： J. H. Rogers , J. S. De Groot , Z. Abou‐Assaleh , J. P. Matte , T. W. Johnston
DOI: 10.1063/1.859139
关键词: Electron scattering 、 Electron temperature 、 Electron 、 Heat transfer 、 Temperature gradient 、 Physics 、 Atomic physics 、 Plasma diagnostics 、 Mean free path 、 Langmuir probe
摘要: Temporal and spatial measurements of electron heat transport are made in the University California Davis AURORA device (J. H. Rogers, Ph.D. dissertation, California, Davis, 1987). In AURORA, a microwave pulse heats region underdense, collisional, plasma (n/ncr ≲1, where ncr =1.8×1010 cm−3 is critical density, Te0 ≊0.15 eV, scattering mean free path λ⊥≳2 cm). this region, strong thermal heating (Tc ≲0.7 eV) as well suprathermal (Th≊3 observed. The results steep temperature gradient that violates approximations classical diffusion theory (LT/λ⊥≳3 for electrons, LT=Tc(∂Tc/∂z)−1 cold scale length. time evolution profile measured using Langmuir probes. relaxation after compared to calculations Fokker–Planck International code [Phys. Rev. Lett. 49, 1936 (1982)] the...
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