They talk about using a wedge-like shield. A small angle can be shielded with a long wedge structure, the large surface area of which allows it to radiate the p

They talk about using a wedge-like shield. A small angle can be shielded with a long wedge structure, the large surface area of which allows it to radiate the produced heat. The spacecraft body is then placed some distance away, to fit within the expanding conical envelope of the shield. Additionally, the space in between can contain a large radiator. By circulating coolant through the shield its mass could be reduced, as it would not need to radiate its own heat.