Electron transport in Tore Supra with fast wave electron heating
The hot electron plasmas in Tore Supra driven by Fast Wave Electron Heating are analyzed for thermal transport. Both neoclassical and anomalous transport processes are taken into account. The dominant power flow is through the electron channel of anomalous thermal diffusivity. The lectron and ion temperature gradient driven instabilities are analyzed for a well documented discharge and shown to explain the diffusivities inferred from the steady state power balance analysis. The discharges are maintained in a quasi-steady state for periods of up to one hundred global energy replacement times. A large Tore Supra database is tested against two models for the turbulent electron thermal conductivity. Good correlation is obtained with an updated version of collisionless skin depth formula. The electrostatic turbulence-based formula performs poorly in the core but well in the outer plasma. The electromagnetic turbulence theory based formula is benchmarked with the empirical Taroni-Bohm formula derived from JET data.
Bibliographic Reference: Article: CEA-FC-1672 (1999)
Record Number: 199911530 / Last updated on: 1999-10-29
Original language: en
Available languages: en