Intermittent transport in edge plasmas
摘要
The properties of low-frequency convective fluctuations and transport are investigated for the boundary region of magnetized plasmas. We employ a two-dimensional fluid model for the evolution of the global plasma quantities in a geometry and with parameters relevant to the scrape-off layer of confined toroidal plasmas. Strongly intermittent plasma transport is regulated by self-consistently generated sheared poloidal flows and is mediated by bursty ejection of particles and heat from the bulk plasma in the form of blobs. Coarse grained probe signals reveal a highly skewed and flat distribution on short time scales, but tends towards a normal distribution at large time scales. Conditionally averaged signals are in perfect agreement with experimental measurements.
引用
@article{arxiv.physics/0410153,
title = {Intermittent transport in edge plasmas},
author = {Odd Erik Garcia and Volker Naulin and Anders Henry Nielsen and Jens Juul Rasmussen},
journal= {arXiv preprint arXiv:physics/0410153},
year = {2007}
}
备注
12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France)