First observation of alpha particle loss induced by kinetic ballooning modes in TFTR deuterium-tritium experiments

Journal Article · Thu Feb 01 00:00:00 EST 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.76.1071· OSTI ID:283940

Chang, Z; Budny, R V; Chen, L; Darrow, D; Fredrickson, E D; Janos, A; Mansfield, D; Mazzucato, E; McGuire, K M; Nazikian, R; Rewoldt, G; Strachan, J D; Tang, W M; Taylor, G; White, R B; Zweben, S ^[1]

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

A correlation between the measured alpha particle loss and high frequency ({approximately}100{endash}200 kHz) magnetohydrodynamic (MHD) modes has been observed in some high {beta} (= plasma pressure/magnetic pressure) DT plasmas in TFTR. These modes are localized around the peak plasma pressure gradient and have ballooning characteristics. Particle simulation shows that the loss is due to wave-particle resonances. Linear instability analysis indicates that the plasma is unstable to the kinetic MHD ballooning modes driven by strong local pressure gradients. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 283940
• Journal Information: Physical Review Letters, Vol. 76, Issue 7; Other Information: PBD: Feb 1996
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
BALLOONING INSTABILITY
TFTR TOKAMAK
ALPHA PARTICLES
LOSSES
CORRELATIONS
MAGNETOHYDRODYNAMICS
PLASMA PRESSURE
SIMULATION
DEUTERIUM
TRITIUM