Patent Number: 042882893
Section: claims

1. A fushion machine comprising a hollow toroidal chamber, a gas of ionized isotopes of hydrogen in said chamber, means for establishing an inducing magnetic field whose amplitude is controllably variable and which has a component perpendicular to the plane of said hollow toroidal chamber and said component being coaxial with the axis of revolution of said hollow toroidal chamber so that an increasing circular plasma electric current is induced in said hollow toroidal chamber as said inducing magnetic field increases, and generating means for generating a strong focusing magnetic field whose amplitude is controllably variable to be proportional to the plasma current and which is toroidally disposed about said axis of revolution and enters on one side of said hollow toroidal cylinder, passes through said hollow toroidal chamber and exits on the other side of said hollow toroidal cylinder in a direction parallel to said axis of revolution. 2. The fusion machine of claim 1 wherein the strong focusing magnetic field varies along a path traced azimuthally about its cylindrical periphery. 3. The fusion machine of claim 2 wherein the strong focusing magnetic field periodically varies along said azimuthal path. 4. The fusion machine of claim 3 wherein the flux lines of the strong focusing magnetic field periodically varies between convex and concave bowing along said azimuthal path. 5. The fusion machine of claim 4 wherein the amplitude of the strong focusing magnetic field varies in synchronism with the amplitude of the inducing magnetic field. 6. The fusion machine of claim 4 wherein said strong focusing generating means comprises a plurality of pairs of magnet sections in operative proximity with said toroidal chamber. 7. The fusion machine of claim 4 wherein the number of pairs of magnetic sections range between 3 and 8. 8. The fusion machine of claim 4 wherein adjacent magnetic sections are on opposite sides of said toroidal chamber. 9. The fusion machine of claim 8 wherein adjacent magnetic sections are separated by an air gap. 10. The fusion machine of claim 9 wherein the length of the air gap is between 50% and 80% of the length of a magnet section. 11. The fusion machine of claim 4 wherein alternate magnet sections are focusing sections and the intervening magnet sections are defocusing sections. 12. The fusion machine of claim 11 wherein each defocusing section has a field index n.sub.D in the range of 4.5 to 8. 13. The fusion machine of claim 12 wherein the field index n.sub.D equals 7. 14. The fusion machine of claim 12 wherein each focusing section has a field index n.sub.F =1-n.sub.D. 15. The fusion machine of claim 6 wherein said magnet sections are arrays of current conductors aligned parallel to the azimuthal of the toroidal chamber.