Patent ID: 7112789

Claim:
A high resolution magnetic analyzer for separating unwanted ion species from a traveling ribbon ion beam, said high resolution magnetic analyzer comprising: a central axis and intended arc pathway for a ribbon ion beam as it travels, said central axis having a predetermined curvilinear shape, an arc with a radius ranging between about 0.25 and 2 meters, and a fixed angle of curvature ranging from not less than about 45 degrees to not more than about 110 degrees of curvature; an arcuate yoke construct encompassing said predetermined curvilinear central axis and surrounding said intended arc pathway for the continuous ribbon ion beam as it travels, said arcuate yoke construct being formed at least in part of a ferromagnetic material and comprising an arcuate wall structure having fixed dimensions and substantially rectangular cross-section, two discrete open ends which serve as an entrance and exit for the traveling beam, and an internal spatial region of determinable volume which serves as a spatial passageway for the traveling beam; a mirror symmetrical pair of loop-shaped coils set in parallel as an aligned array, (a) wherein each discrete coil of the pair in the aligned array (i) is an elongated complete loop comprised at least in part of electrically conductive material, (ii) is an elongated complete loop having two rounded and inclined loop ends, each of which is bent in the same direction, and (iii) is an elongated complete loop formed as a set of multiple conductive segments placed in sequential series wherein each segment is fixed at a pre-chosen sequence position and individual angle orientation with respect to said central axis and intended arc pathway for the ribbon ion beam as it travels within said internal spatial region of said arcuate yoke construct, and (b) wherein the aligned array of two looped-shaped coils paired in mirror symmetry (iv) presents a bend direction for the two rounded inclined ends of one looped-shaped coil which is opposite to the bend direction for the two rounded inclined ends of the other looped-shaped coil in the array, (v) provides a central open spatial channel via the cavity volume of the closed loop in each of the two coils, said central open spatial channel extending from each of said inclined loop ends to the other over the linear dimensional distance of the array, (vi) is positioned within said internal spatial region along the interior surfaces of two opposing walls of said arcuate yoke construct such that one pair of aligned rounded inclined loop ends extends from and lies adjacent to each of the two open ends of said arcuate yoke construct, (vii) serves as limiting boundaries for said curvilinear central axis and intended arc pathway for the continuous ribbon ion beam as it travels in the gap space existing between said two loop-shaped coils positioned within said internal spatial region of said arcuate yoke construct.