flat perpendicular and tangent to the surface of its narrow base. This geometry, a variant of the cone geometry, is used for cases involving surface applications with one dose constraint. The 471 geometry, shown in Fig. 3, consists of two hemispherical shells of differing thicknesses. This configuration is used for manned applications that have different dose constraints for two halves of space. The 4tt with a conical insert geometry, shown in Fig. 4, is also for manned applications that have two areas with differing dose constraints and consists of a spherical shell with a cone geometry plug inserted into it. The area with the more rigorous dose constraint is smaller and more defined for the 4?t with a conical insert geometry as compared with the 471 geometry. In addition, both the cone geometry and the truncated cone geometry can have ‘winglet’ shields (Fig. 5) added on to enlarge the protected area at the payload. These additional ‘winglets’ can impose a different dose constraint than the rest of the shield, and could be used to shield various objects which protrude outside of the main area of shielding (e.g. antennas).
RkJQdWJsaXNoZXIy MTU5NjU0Mg==