Study of high-beta magnetohydrodynamic modes and fast-ion losses in PDX

Journal Article · Mon Mar 21 00:00:00 EST 1983 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.50.891· OSTI ID:6295461

McGuire, K; Goldston, R; Bell, M

Strong magnetohydrodynamic activity has been observed in PDX neutral-beam--heated discharges. It occurs for ..beta../sub T/q> or =0.045 and is associated with a significant loss of fast ions and a drop in neutron emission. As much as 20%--40% of the beam heating power may be lost. The instability occurs in repetitive bursts of oscillations of < or =1 msec duration at 1--6 msec intervals. The magnetohydrodynamic activity has been dubbed the ''fishbone instability'' from its characteristic signature on the Mirnov coils.

• Research Organization: Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08544
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6295461
• Journal Information: Phys. Rev. Lett.; (United States), Vol. 50:12
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
HIGH-BETA PLASMA
MAGNETOHYDRODYNAMICS
PDX DEVICES
ENERGY LOSSES
PLASMA INSTABILITY
ION DRIFT
NEUTRAL ATOM BEAM INJECTION
NEUTRON EMISSION
PLASMA HEATING
BEAM INJECTION
DIVERTORS
EMISSION
FLUID MECHANICS
HEATING
HYDRODYNAMICS
INSTABILITY
LOSSES
MECHANICS
PLASMA
700107* - Fusion Energy- Plasma Research- Instabilities
700101 - Fusion Energy- Plasma Research- Confinement
Heating
&amp; Production