I wonder if 30+ km/s directional plasma bursts can turn blades of an extra high-speed and hardened turbine.
Maybe de-acceleration of plasma in a long tunnel with EM fields with extraction of collective motion energy?
The technology obviously does not currently exist but sounds to me possible in principle.
I'm rather put in mind of thinking of taking the thrust and applying it
at the tips of the blades, a bit like the "emergency lift system" occasionally tried on helicopters[1]. Except that the blades need not/should not be even inclined away from the plane of rotation... The whole aim is to push the 'rotor' assembly round, this to be mechanically tapped for power.
The dangerous wash of the venting thrust never aims anywhere but "outwards" (tangentially backwards, of course), which any housing around can be placed fare enough away not to be dangerously "torched" by each and every passing armature as it spins by. The blade needs 'only' be strong enough to transfer the thrust to the axle, which might be progressively loaded/geared highly onto increasing numbers of generators/etc, if there's enough power to spare.
However, I don't hold up much hope that this is practical (or efficient). Merely maybe more practical than trying to make fan/turbine blades that are themselves resistant of a 'fusion torch', or similar, at a distance useful enough to try to recover the given energies.
(Besides that, some less aggressive/less frequent fusion pulse might be used to send (and smudge) an extreme heat-pulse through a rather more resilient mass block of material, on which the other side is drenched in water (or another suitable liquid for the temperature) to pipe (or further pipe by proxies) the energy through a standard turbine system. Just with a rather more 'exotic' boiler element as its source.)
[1] Some monopropellant like H
2O
2 stored at the rotor-head and then centripetally piped to the rotor-tips, at need, and vented in order to spin up faster (or 'cruise' faster than normal for a limited time).