<P> Radiation implosion was first developed by Klaus Fuchs and John von Neumann in the United States , as part of their work on the original `` Classical Super '' hydrogen bomb design . Their work resulted in a secret patent filed in 1946 , and later given to the USSR by Fuchs as part of his nuclear espionage . However , their scheme was not the same as used in the final hydrogen bomb design , and neither the American nor the Soviet programs were able to make use of it directly in developing the hydrogen bomb ( its value would become apparent only after the fact ) . A modified version of the Fuchs - von Neumann scheme was incorporated into the `` George '' shot of Operation Greenhouse . </P>
who designed the staged radiation implosion model of the hydrogen bomb
Klaus Fuchs John von Neumann