Mode--particle resonances during near-tangential neutral beam injection in the Tokamak Fusion Test Reactor

Journal Article · Sun Jul 01 00:00:00 EDT 1990 · Physics of Fluids B; (USA)

DOI:https://doi.org/10.1063/1.859483· OSTI ID:6756730

Kaita, R; White, R B; Morris, A W; Fredrickson, E D; McGuire, K M; Medley, S S; Murphy, T J; Scott, S D ^[1]

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1. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (USA)

Coherent magnetohydrodynamic modes have been observed previously during neutral beam injection in the PDX tokamak (Phys. Rev. Lett. {bold 50}, 891 (1983)) and they have now been seen in the TFTR tokamak (Phys. Fluids {bold 26}, 2958 (1983)). Periodic bursts of oscillations were detected with several plasma diagnostics, and Fokker--Planck calculations show that the populations of trapped particles in both tokamaks are sufficient to account for fishbone destabilization if a resonant interaction, between the mode and the beam ions, is assumed. Estimates of mode parameters are in reasonable agreement with the experiments, and they indicate that the fishbone mode may continue to affect the performance of intensely heated tokamaks.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6756730
• Journal Information: Physics of Fluids B; (USA), Vol. 2:7; ISSN 0899-8221
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
MAGNETOHYDRODYNAMICS
FISHBONE INSTABILITY
TFTR TOKAMAK
NEUTRAL ATOM BEAM INJECTION
COHERENT RADIATION
OSCILLATION MODES
PLASMA DIAGNOSTICS
RESONANCE
TEST REACTORS
THERMONUCLEAR REACTORS
TRAPPING
BEAM INJECTION
ELECTROMAGNETIC RADIATION
FLUID MECHANICS
HYDRODYNAMICS
INSTABILITY
MECHANICS
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RADIATIONS
REACTORS
RESEARCH AND TEST REACTORS
TOKAMAK TYPE REACTORS
700107* - Fusion Energy- Plasma Research- Instabilities
700101 - Fusion Energy- Plasma Research- Confinement
Heating
& Production