Steady State Turbulent Transport in Magnetic Fusion Plasmas

W.W. Lee, S. Ethier, R. Kolesnikov, W.X. Wang, and W.M. Tang

Princeton University. Plasma Physics Laboratory.

关键词: Acceleration;    70 Plasma Physics And Fusion Technology;    Supercomputers;    Transport Computer Simulation;    Computer Simulation;   

RP-ID  :  PPPL-4275
RP-ID  :  DE-ACO2-76CHO3073
RP-ID  :  960427

美国|英语

来源: UNT Digital Library

【 摘 要 】

For more than a decade, the study of microturbulence, driven by ion temperature gradient (ITG) drift instabilities in tokamak devices, has been an active area of research in magnetic fusion science for both experimentalists and theorists alike. One of the important impetus for this avenue of research was the discovery of the radial streamers associated the ITG modes in the early nineties using a Particle-In-Cell (PIC) code. Since then, ITG simulations based on the codes with increasing realism have become possible with the dramatic increase in computing power. The notable examples were the demonstration of the importance of nonlinearly generated zonal flows in regulating ion thermal transport and the transition from Bohm to GyroBoham scaling with increased device size. In this paper, we will describe another interesting nonlinear physical process associated with the parallel acceleration of the ions, that is found to play an important role for the steady state turbulent transport. Its discovery is again through the use of the modern massively parallel supercomputers.