Studies of a poloidal divertor reversed-field pinch

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7231063

Sarff, J S

Several attempts were made to form a reversed-field pinch (RFP) in a four-node, poloidal-divertor configuration which positions the plasma far from a conducting wall. In this configuration, the plasma is localized within a magnetic separatrix formed by the combination of toroidal currents in the plasma and four, internal, conducting rings. These experiments were conducted on three devices: Tokapole II, the Wisconsin Levitated Octupole, and the modified Octupole with smaller conducting rings. transient, RFP-like equilibria were obtained on Tokapole II and the Wisconsin Levitated Octupole. RFP-like equilibria with field-reversal duration {approximately}1 msec were obtained on the small ring Octupole. None of these plasmas was sustained against resistive magnetic diffusion. Local, internal measurements of the magnetic field in Tokapole II plasmas indicated the plasma current and density were mostly confined to the region inside the magnetic separatrix. The sharp drop in plasma pressure near the separatrix generated a large diamagnetic current in that region. Large magnetic perturbations were observed in the startup phase of these plasmas.

• Research Organization: Wisconsin Univ., Madison, WI (USA)
• OSTI ID: 7231063
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
CLOSED CONFIGURATIONS
CLOSED PLASMA DEVICES
CONFINEMENT TIME
CURRENTS
DISTURBANCES
DIVERTORS
ELECTRIC CURRENTS
INTERNAL RING DEVICES
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FIELDS
MULTIPOLAR CONFIGURATIONS
OCTUPOLAR CONFIGURATIONS
PINCH EFFECT
PLASMA DENSITY
PLASMA PRESSURE
POLOIDAL FIELD DIVERTORS
REVERSE-FIELD PINCH
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TOKAPOLE DEVICES