Induced nuclear reactions: processes – systems – and elements – Nuclear fusion – Magnetic confinement of plasma
Patent
1986-04-25
1988-08-30
Kyle, Deborah L.
Induced nuclear reactions: processes, systems, and elements
Nuclear fusion
Magnetic confinement of plasma
376126, G21B 100
Patent
active
047675900
ABSTRACT:
An apparatus and method for maintaining a steady-state current in a toroidal magnetically confined plasma. An electric current is generated in an edge region at or near the outermost good magnetic surface of the toroidal plasma. The edge current is generated in a direction parallel to the flow of current in the main plasma and such that its current density is greater than the average density of the main plasma current. The current flow in the edge region is maintained in a direction parallel to the main current for a period of one or two of its characteristic decay times. Current from the edge region will penetrate radially into the plasma and augment the main plasma current through the mechanism of anomalous viscosity.
In another aspect of the invention, current flow driven between a cathode and an anode is used to establish a start-up plasma current. The plasma-current channel is magnetically detached from the electrodes, leaving a plasma magnetically insulated from contact with any material obstructions including the cathode and anode.
REFERENCES:
patent: 3831101 (1974-08-01), Benford et al.
Furth et al., "Tearing Mode in the Cylindrical Tokomak," Phys. Fluids 16, p. 1054 (1973).
Stix, "Current Penetration and Plasma Disruption," Phys. Rev. Letters 36, p. 521 (1976).
Stix, "Plasma Transport Across a Braided Magnetic Field," Fusion 18, p. 3 (1978).
Ono et al., "Electron-Beam Injection Experiment in Act-1 for Tokomak Start-Up and Current Dr.," Bull. Am. Phys. Soc. 27, p. 967 (1982).
Ono Masayuki
Stix Thomas H.
Gottlieb Paul A.
Hightower Judson R.
Klein Richard L.
Kyle Deborah L.
The United States of America as represented by the United States
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