EDGE TURBULENCE AT PLASMA POLARISATION ON THE CASTOR TOKAMAK

摘要

Electrostatic turbulence is responsible for anomalous particle and heat losses from tokamakrnplasmas. The equilibrium level of plasma fluctuations is determined by competition of therngrowth rate r and the damping rateγ of the most unstable modes.rnThe fluctuation growth rate is hardly to be deduced theoretically, namely at the plasma edge,rnwhere various models of the core and scrape-off layer turbulence overlap. A reasonable lowerrnestimate of r can be found from the autocorrelation time of fluctuations τ_A that can be easilyrnderived from experimental data, rγ> τ_u001cA [1].