Internal kink mode dynamics in high-β NSTX plasmas

Autor:	J.E Menard, R.E Bell, E.D Fredrickson, D.A Gates, S.M Kaye, B.P LeBlanc, R Maingi, S.S Medley, W Park, S.A Sabbagh, A Sontag, D Stutman, K Tritz, W Zhu, the NSTX Research Team
Rok vydání:	2005
Předmět:	Physics Nuclear and High Energy Physics Angular momentum Toroid Magnetic confinement fusion Plasma Kink instability Condensed Matter Physics Kinetic energy Nuclear physics Physics::Plasma Physics Diamagnetism Plasma diagnostics Atomic physics
Zdroj:	Nuclear Fusion. 45:539-556
ISSN:	1741-4326 0029-5515
Popis:	Saturated internal kink modes have been observed in many of the highest toroidal β discharges of the National Spherical Torus Experiment (NSTX). These modes often cause rotation flattening in the plasma core, can degrade fast-ion confinement and in some cases contribute to the complete loss of plasma angular momentum and stored energy. Characteristics of the modes are measured using soft x-ray, kinetic profile and magnetic diagnostics. Toroidal flows approaching Alfvenic speeds, island pressure peaking and enhanced viscous and diamagnetic effects associated with high-β may contribute to mode nonlinear stabilization. These saturation mechanisms are investigated for NSTX parameters and compared with experimental data.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f9fbec5c5a5aa3a5e258dc7abdd1cced https://doi.org/10.1088/0029-5515/45/7/001 Zobrazit plný text záznamu