It seems its purpose is to generate a high-voltage pulse, which can be used to generate X-rays, radar pulses, pulses for Pockels cells (laser app), pulses for CO2 TEA lasers, and ignition pulses for the conventional explosives in a nuclear weapon.
Used as a scientific display - ok, but I fail to see how this can be "harnessed" & used to power anything domestic. It would be an inefficient & noisy step no matter what.