dorsal/arxiv
View SchemaIntermittent transport in edge plasmas
| Authors | Odd Erik Garcia, Volker Naulin, Anders Henry Nielsen, Jens Juul Rasmussen |
|---|---|
| Categories | |
| ArXiv ID | physics/0410153 |
| URL | https://arxiv.org/abs/physics/0410153 |
Abstract
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.
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"abstract": "The properties of low-frequency convective fluctuations and transport are\ninvestigated for the boundary region of magnetized plasmas. We employ a\ntwo-dimensional fluid model for the evolution of the global plasma quantities\nin a geometry and with parameters relevant to the scrape-off layer of confined\ntoroidal plasmas. Strongly intermittent plasma transport is regulated by\nself-consistently generated sheared poloidal flows and is mediated by bursty\nejection of particles and heat from the bulk plasma in the form of blobs.\nCoarse grained probe signals reveal a highly skewed and flat distribution on\nshort time scales, but tends towards a normal distribution at large time\nscales. Conditionally averaged signals are in perfect agreement with\nexperimental measurements.",
"arxiv_id": "physics/0410153",
"authors": [
"Odd Erik Garcia",
"Volker Naulin",
"Anders Henry Nielsen",
"Jens Juul Rasmussen"
],
"categories": [
"physics.plasm-ph"
],
"title": "Intermittent transport in edge plasmas",
"url": "https://arxiv.org/abs/physics/0410153"
},
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