Effect of internal magnetic structure on energetic ion confinement in tokamaks

Journal Article · Mon Aug 16 04:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.71.1011· OSTI ID:6022197

Roberts, D W; Kaita, R; Levinton, F; Asakura, N; Bell, R; Chance, M; Duperrex, P; Gammel, G; Hatcher, R; Holland, A; Kaye, S; Kessel, C; Kugel, H; LeBlanc, B; Manickam, J; Okabayashi, M; Paul, S; Pomphrey, N; Powell, E; Sauthoff, N ; Sesnic, S; Takahashi, H; White, R ^[1]

---

1. Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543 (United States)

For the tokamak magnetic confinement concept, theory has predicted a distinct relationship between the plasma shape, the internal magnetic structure, and the presence or absence of fast ion losses in the presence of plasma instabilities. We have, for the first time, carried out measurements of the magnetic safety factor profile, [ital q]([ital r]), in plasmas unstable to a specific instability, the so-called fishbone'' mode. The experimental equilibria reconstructed from these data have been used to demonstrate that when the plasma is unstable to fishbones, the fast ion confinement properties depend strongly on the radius of the magnetic surface where [ital q]([ital r])=1.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6022197
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 71:7; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
CHARGED PARTICLES
CLOSED PLASMA DEVICES
CONFINEMENT
EQUILIBRIUM
FISHBONE INSTABILITY
INSTABILITY
IONS
MAGNETIC CONFINEMENT
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC SURFACES
PARTICLE LOSSES
PLASMA CONFINEMENT
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES