US 11,705,250 B2
High Z permanent magnets for radiation shielding
Scott McCall, Livermore, CA (US); and Richard Culbertson, Poway, CA (US)
Assigned to Lawrence Livermore National Security, LLC, Livermore, CA (US); and American Ceramic Technology, Poway, CA (US)
Filed by Lawrence Livermore National Security, LLC, Livermore, CA (US); and American Ceramic Technology, Poway, CA (US)
Filed on Dec. 4, 2020, as Appl. No. 17/112,726.
Claims priority of provisional application 62/944,252, filed on Dec. 5, 2019.
Prior Publication US 2021/0174979 A1, Jun. 10, 2021
Int. Cl. G21F 1/08 (2006.01); C22C 30/00 (2006.01); H01F 1/055 (2006.01); G21F 1/12 (2006.01); H01F 27/36 (2006.01); C22C 27/04 (2006.01)
CPC G21F 1/085 (2013.01) [C22C 27/04 (2013.01); C22C 30/00 (2013.01); G21F 1/125 (2013.01); H01F 1/055 (2013.01); H01F 27/366 (2020.08); C22C 2202/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A magnetic shielding material comprising:
a material comprising manganese bismuth (MnBi) and tungsten (W),
wherein a ratio of MnBi:W by weight is in a range of 50:50 to about 70:30,
wherein the magnetic shielding material comprises a plurality of first portions and a plurality of second portions, the first portions of the material are comprised of the manganese bismuth and the second portions of the material are comprised of the tungsten, the second portions being separate from the first portions,
wherein the first and second portions are positioned in the material according to an arrangement defined by a predefined pattern of the first and second portions in an x-y plane.