Fast Alfven eigenmodes in a rectangular cross-section torus

Autor:	M J Ballico, Rod Cross
Rok vydání:	1991
Předmět:	Physics Work (thermodynamics) media_common.quotation_subject Single-mode optical fiber Torus Mechanics Plasma Edge (geometry) Condensed Matter Physics Asymmetry Cross section (physics) Classical mechanics Nuclear Energy and Engineering Physics::Plasma Physics Boundary value problem media_common
Zdroj:	Plasma Physics and Controlled Fusion. 33:1825-1839
ISSN:	1361-6587 0741-3335
DOI:	10.1088/0741-3335/33/14/007
Popis:	Previous theoretical work on fast Alfven eigenmodes suggests that it is not possible for any single mode to satisfy boundary conditions in a rectangular cross-section torus, even though such modes are observed experimentally. The authors show that it is possible for fast wave modes to satisfy the boundary conditions, provided that the bulk plasma is separated from the vessel walls by a low-density edge plasma or vacuum region. The boundary conditions can then be satisfied by the presence of poloidally-evanescent wave fields. Toroidal geometry introduces a strong asymmetry in the wavefields between the high- and low-field sides of the torus, but the eigenfrequencies are close to those predicted using a simple cylindrical model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e39cde1a817a9cbe61cc120fdbeb33fc https://doi.org/10.1088/0741-3335/33/14/007 Zobrazit plný text záznamu