JimmyT wrote: Let’s say you design your system to go after particles of 65Kev and were able to capture all the energy from them. Any particles of energy less than that would be decelerated, stopped and reversed by the induced magnetic field. Accelerating them back into the reaction chamber and taking some energy with them. Any particles faster than that will still have their residual velocity (the amount in excess of 65Kev ) when they reach the helium catchment container (Which thus may need cooling.)
There may be a way to mitigate this problem by using multiple coils. But I’m not sure how we would do that exactly.
What about using something similar to a mass spectrometer. Just that it doesn’t split the masses, but velocities. And behind that splitter set up an array of coils of different length.