Title :
Characteristics of transport barrier generation from gyrokinetic plasma Simulation in a Tokamak
Author :
Ekholm, T.H. ; Janhunen, S. ; Heikkinen, J.A. ; Henriksson, S.V. ; Kiviniemi, T.P.
Author_Institution :
Dept. of Eng. Phys. & Math., Helsinki Univ. of Technol., Finland
fDate :
4/1/2005 12:00:00 AM
Abstract :
An advanced full f gyrokinetic three-dimensional (3-D) plasma simulation code has been developed, thus making it possible to treat steep plasma gradients, wide particle orbit effects, and rapid dynamic changes in long simulations. The study of a small tokamak plasma heated by lower hybrid waves shows a generation of internal transport barrier which is detected as a simultaneous collapse of heat and particle diffusion coefficients as well as large scale structures in fluctuations inside the barrier.
Keywords :
Tokamak devices; plasma fluctuations; plasma hybrid waves; plasma kinetic theory; plasma simulation; plasma toroidal confinement; plasma transport processes; barrier fluctuations; gyrokinetic three-dimensional plasma simulation code; heat diffusion coefficient; internal transport barrier; large scale structures; lower hybrid waves; particle diffusion coefficient; small tokamak plasma; steep plasma gradients; transport barrier generation; wide particle orbit effects; Character generation; Electrons; Magnetic confinement; Plasma confinement; Plasma density; Plasma simulation; Plasma temperature; Plasma transport processes; Plasma waves; Tokamaks; Magnetic confinement; scientific visualisation; transport; turbulence;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2005.845070
