Reversed-field flux-trapping in a low-compression theta pinch

Journal Article · Mon Feb 01 04:00:00 EST 1982 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.863756· OSTI ID:5725719

Knox, S O; Meuth, H; Ribe, F L; Sevillano, E

Rapid field reversal is employed to trap an initial negative-magnetic-field bias flux in a 300-cm long theta pinch having an inner radius of 10 cm. A large fraction (40%--75%, depending on filling pressure) of the initial bias flux is trapped after the implosion (approx.1 ..mu..sec); this fraction then diminishes to a plateau value of 25% to 35% in approximately 2 ..mu..sec. During this decay, magnetic probe measurements indicate an average anomalous resistivity one order of magnitude greater than classical. The open-line configurations obtained have large separatrix (zero enclosed flux) radii and are present for the duration of the applied magnetic field. The presence of the reversed bias field lowers the plasma temperature by a factor of two.

• Research Organization: University of Washington, Seattle, Washington 98195
• OSTI ID: 5725719
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 25:2; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
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IMPLOSIONS
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FIELD REVERSAL
MAGNETIC FLUX
PINCH EFFECT
THETA PINCH
TRAPPING