Open AccessSize Scaling of Turbulent Transport in Magnetically Confined Plasmas
Author(s) -
Lin Zhang,
S. Ethier,
T. S. Hahm,
W. M. Tang
Publication year - 2002
Language(s) - English
Resource type - Reports
DOI - 10.2172/796224
Subject(s) - gyroradius , scaling , turbulence , dimensionless quantity , plasma , physics , ion , mechanics , statistical physics , condensed matter physics , computational physics , nuclear physics , mathematics , quantum mechanics , geometry
Transport scaling with respect to device size in magnetically confined plasmas is critically examined for electrostatic ion temperature gradient turbulence using global gyrokinetic particle simulations. It is found, by varying device size normalized by ion gyroradius while keeping other dimensionless plasma parameters fixed, that fluctuation scale length is microscopic in the presence of zonal flows. The local transport coefficient exhibits a gradual transition from a Bohm-like scaling for device sizes corresponding to present-day experiments to a gyro-Bohm scaling for future larger devices