Except this one isn’t basic physics research. It’s an end run around nuclear weapons treaties to test how missiles and planes respond to H-bombs going off nearby.
It could have an energy application (maybe), but given that the targets are ludicrously expensive, the most viable power plant would resemble the attempts in the 60s to use bombs in underground caverns to heat things up and put essentially a geothermal plant on top. Except with a laser detonator rather than a fission one. Chances of making it economically viable or reliable are slim.