There is just basic h-bomb efficiency gains here. By lowering the energy requirement for the fission primary by finding more efficient ways to control/generate

There is just basic h-bomb efficiency gains here. By lowering the energy requirement for the fission primary by finding more efficient ways to control/generate the X-Rays you can use a smaller and smaller primary. It also occurs to me how analogous this research is to the early x-ray laser tech, that Teller claimed could shoot down warheads for the Star Wars program in the 80s. Those designs had rods that would amplify and focus the x-rays from a nuclear bomb on incoming warheads. If you could initiate the x-ray chain reaction from a laser, you would be able to launch these without breaking the 'no nuclear weapons in space' treaty.