The Anomalous Transport in Turbulent Plasmas
نویسندگان
چکیده
The particle and energy transport was analyzed for different regions and regimes of the plasma in tokamak with special attention for ITER. For the particle transport in the tokamak edge plasma was obtained results useful for the qualitative cross-check of the numerical models of the first principle simulations, including ITER, as well as in the elaboration of the simplified, reduced models of the edge plasma transport studies.
منابع مشابه
Turbulent electron thermal transport in tokamaks
The origin of anomalous electron thermal turbulence from spatial gradients in magnetized plasmas is described. Laboratory experiments demonstrating key features of drift waves are reviewed. The turbulent electromagnetic fields produce an anomalous transport that scales with both the gradient parameters and microscopic plasma scale length parameters. The change from the micro-scale dominated gyr...
متن کاملTurbulent particle transport in magnetized plasmas.
Particle transport in magnetized plasmas is investigated with a fluid model of drift wave turbulence. An analytical calculation shows that magnetic field curvature and thermodiffusion drive an anomalous pinch. The curvature driven pinch velocity is consistent with the prediction of turbulence equipartition theory. The thermodiffusion flux is found to be directed inward for a small ratio of elec...
متن کاملTurbulence Diagnostic Simulator for Analyzing Structural Formation in Magnetically Confined Plasmas
Turbulent structures affect the level of anomalous transport, and their formation mechanism is one of the crucial issues in the fusion plasmas. The structural formation mechanism in cylindrical plasmas is discussed in detail to identify the bifurcation phenomena of the turbulent structure. A three-field reduced MHD model was extended to describe the resistive drift wave turbulence, and a zonal ...
متن کاملTurbulent Fluctuations with the Electron Gyro-Scale in NSTX Plasmas
Various theories and numerical simulations support the conjecture that the ubiquitous problem of anomalous electron transport in tokamaks may arise from an electron gyro-scale turbulence driven by the electron temperature gradient. To check whether such turbulence is present in plasmas of the National Spherical Torus Experiment (NSTX), measurements of turbulent fluctuations were performed with ...
متن کاملTrapping, Anomalous Transport, and Quasi-coherent Structures in Magnetically Confined Plasmas∗)
Strong electrostatic turbulence in magnetically confined plasmas is characterized by trapping or eddying of particle trajectories produced by the E × B stochastic drift. Trapping is shown to produce strong effects on test particles and on test modes by causing nonstandard trajectory statistics: non-Gaussian distribution, memory effects, and coherence. Trapped trajectories form quasi-coherent st...
متن کامل