Hybrid magnetic trap based on a combination of various helical field harmonics

Abstract

The authors describe hybrid magnetic trap of the stellarator type (Unitron) employing a helical winding with four poles arranged in a certain way with respect to the minor azimuth. Combination of the helical conductors and current provides qualitatively different magnetic traps with spatial and plane magnetic axes. Analytical expression are derived for the various characteristics of the main types of Unitron trap. A study of the parameters of the Unitron shows that the system with the second and third harmonics of the helical field has better confinement properties.

Recent stellarator research

“…This configuration can also have the property of average minimum B [16][17][18]. The properties of the hybrid magnetic fields of different multipolarity are examined in Refs [19][20][21][22]. The stellarator field formed by helical windings with non-circular cross-section is studied in Ref.…”

“…The twisted coil system is more effective than the elliptic coil system in the realization of a larger rotational transform. When the co-ordinates of the twisted coils are r = a, z = (21) where…”