Experimental study of axisymmetric instability of inverse-dee and square tokamak equilibria

Journal Article · Mon Jul 02 04:00:00 EDT 1979 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.43.36· OSTI ID:6122822

Lipschultz, B; Prager, S C; Osborne, T H; Sprott, J C; Phillips, M

Inverse-dee-- and square--shaped equilibria are observed by experimentally mapping the magnetic-flux plot as a function of time in a tokamak with a 4-null poloidal divertor. Inverse-dee equilibria are observed to be unstable to the vertical magnetohydrodynamic axisymmetric instability on a time scale approx. 1000 poloidal Alfven times. Square equilibria are stable on the time scale available for observation. Instability growth is apparently slowed by field-shaping hoop and wall passive stabilization.

• Research Organization: University of Wisconsin, Madison, Wisconsin 53706
• OSTI ID: 6122822
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 43:1; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
AXIAL SYMMETRY
CLOSED PLASMA DEVICES
CONFIGURATION
DIVERTORS
ELECTRON DENSITY
ELECTRON TEMPERATURE
ENERGY RANGE
EQUILIBRIUM
EV RANGE
EV RANGE 10-100
FLUID MECHANICS
HYDRODYNAMICS
INSTABILITY
INTERFEROMETRY
ION TEMPERATURE
MAGNETIC FLUX
MAGNETOHYDRODYNAMICS
MECHANICS
MULTIPOLES
OCTUPOLES
PLASMA INSTABILITY
RECTANGULAR CONFIGURATION
SQUARE CONFIGURATION
SYMMETRY
THERMONUCLEAR DEVICES
TIME DEPENDENCE
TOKAMAK DEVICES