JAMES ALAN LEUER
Pilots at Vanessa Cir, Encinitas, CA

4921661, May 1, 1990

Nov 3, 1989

7/431365

James A. Leuer - Encinitas CA

The United States of America as represented by the United States
Department of Energy - Washington DC

G21B 100

376136

A large toroidal vacuum chamber for plasma generation and confinement is lined with a toroidal blanket for shielding using modules segmented in the toroidal direction. To provide passive stabilization in the same manner as a conductive vacuum chamber wall, saddle-shaped conductor loops are provided on blanket modules centered on a midplane of the toroidal chamber with horizontal conductive bars above and below the midplane, and vertical conductive legs on opposite sides of each module to provide return current paths between the upper and lower horizontal conductive bars. The close proximity of the vertical legs provided on adjacent modules without making physical contact cancel the electromagnetic field of adjacent vertical legs. The conductive bars spaced equally above and below the midplane simulate toroidal conductive loops or hoops that are continuous, for vertical stabilization of the plasma even though they are actually segmented.

6054913, Apr 25, 2000

Oct 28, 1997

8/959012

James A. Leuer - Encinitas CA

General Atomics - San Diego CA

H01F 600

335299

An apparatus for creating and controlling a toroidal magnetic field, and a poloidal magnetic field employs a conductive sheet rolled into a spiral with cut outer legs aligned and bent outwardly toward a position approximately adjacent to corresponding other cut outer legs. Such apparatus is formed by forming a conductive sheet; cutting a first plurality of cut outer legs into the sheet; cutting a second plurality of cut outer legs into the sheet; rolling the conductive sheet into a spiral; and bending outwardly each of the cut outer legs. In an alternative, the apparatus has a conductive tube with each of a first plurality cut outer legs bent outwardly to couple to corresponding ones of a second plurality of cut outer legs. Such alternative is made by forming a conductive tube; cutting a plurality cut outer legs at one of the conductive tube; cutting another plurality cut outer legs at another of the conductive tube; bending outwardly the cut outer legs; and coupling ones of the plurality of cut outer leg to corresponding ones of the other plurality of cut outer legs. The above mentioned devices may include a spiral resistive strip or thermally induced resistive spiral in a centerpost region.