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US 4,663,109 AGranted
Helical axis stellarator with noninterlocking planar coils
AssigneeThe United States of America as represented by the United States Department of Energy
InventorsAllan Reiman, Allen H. Boozer
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Abstract
A helical axis stellarator using only noninterlocking planar, non-circular coils, generates magnetic fields having a magnetic well and large rotational transform with resultant large equilibrium beta.
Claims7
A closed, curved, planar toroidal field coil for use on a stellarator having a helical axis, said coil having a radius r.sub.o, pitch kr.sub.o and period m, the curve of said coil being defined in .rho., .theta. coordinates by the relationship:
- .rho.=a.sub.c +.delta..sub.2 cos 2.theta.+.delta..sub.3 cos 3.theta. where a.sub.c, .delta..sub.2, and .delta..sub.3 are constants and at least one of .sub.2 and .sub.3 is not equal to zero and wherein a.sub.c, .delta..sub.2, and .delta..sub.3 satisfy the relationship:
- ##EQU6## and .delta..sub.2 .noteq.0 and .delta..sub.3 .noteq.0.
Apparatus for confining a plasma comprising:
- a closed endless tube;
- and
- a plurality of closed, curved, planar coils spaced about said tube, the centers of said coils defining a helical axis, said helical axis having a radius r.sub.o, pitch kr.sub.o and period m and being substantially parallel to the axis of said tube, the plane of each coil being substantially perpendicular to said helical axis, the curve of each coil being defined in .rho., .theta. coordinates by the relationship:
- .rho.=a.sub.c +.delta..sub.2 cos 2.theta.+.delta..sub.3 cos 3.theta.,
- where a.sub.c, .delta..sub.2, and .delta..sub.3 are constants and at least one of .delta..sub.2 and .delta..sub.3 is not equal to zero and wherein a.sub.c, .delta..sub.2, and .delta..sub.3 satisfy the relationship:
- ##EQU7## where .delta..sub.2 .noteq.0 and .delta..sub.3 .noteq.0.
3 more elements
Dependencies are inferred from the claim text.