Patent ID: 8575580
Filing Date: 2013-11-05
Classification: B64G,G21F

Abstract:
1. A radiation shield device comprising: a first shell at least partially surrounding an area to be shielded from radiation, wherein the first shell comprises a plurality of coils that encircle the area to be shielded from radiation; and a second shell at least partially surrounding the area to be shielded from radiation and spaced apart from and further away from the area to be shielded than the first shell, said second shell also comprising a plurality of coils that encircle the area to be shielded from radiation and the first shell, wherein the coils of the first shell are arranged in coil groupings and paired with coil groupings of the second shell, and wherein the coil groupings of the first shell are configured to support current flow in an opposite direction to that in which the paired coil groupings of the second shell are configured to support current flow such that each coil grouping of the first shell has north and south poles that are correspondingly oppositely positioned from the north and south poles of the paired coil grouping of the second shell, and wherein the first and second shells are configured with ampere-turns that result in opposing magnetic field strengths within the first shell that are within a predefined percentage of one another, and wherein the first and second shells are configured with ampere-turns that result in nominally equal magnetic field strengths.