Tangential neutral-beam--driven instabilities in the Princeton beta experiment

Journal Article · Mon Aug 18 00:00:00 EDT 1986 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.57.835· OSTI ID:5068584

Heidbrink, W W; Bol, K; Buchenauer, D; Fonck, R; Gammel, G; Ida, K; Kaita, R; Kaye, S; Kugel, H; LeBlanc, B

During tangential neutral-beam injection into the PBX tokamak, bursts of two types of instabilities are observed. One instability occurs in the frequency range 120--210 kHz and the other oscillates predominantly near the frequency of bulk plasma rotation (20--30 kHz). Both instabilities correlate with drops in neutron emission and bursts in charge-exchange neutral flux, indicating that beam ions are removed from the center of the plasma by the instabilities. The central losses are comparable to the losses induced by the fishbone instability during perpendicular injection.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• OSTI ID: 5068584
• Journal Information: Phys. Rev. Lett.; (United States), Vol. 57:7
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PBX DEVICES
PLASMA INSTABILITY
PLASMA
NEUTRAL ATOM BEAM INJECTION
PARTICLE LOSSES
CHARGE EXCHANGE
KHZ RANGE 01-100
KHZ RANGE 100-1000
NEUTRON EMISSION
BEAM INJECTION
CLOSED PLASMA DEVICES
EMISSION
FREQUENCY RANGE
INSTABILITY
KHZ RANGE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700107* - Fusion Energy- Plasma Research- Instabilities