"But each fusion does release three helium atoms with 2900 keV of charge. These charged helium atoms are easy to collect and use, and their impressive charge can be used to easily generate power." Uhh... keV is a unit of energy, not charge. Charge is not energy.

More importantly, colliding beams mostly miss each other. If it were possible to "aim" a beam of ions at other ions with atomic precision, we could make negative muons efficiently enough to make muon catalyzed fusion energy-producing.

It would be better to put a thin solid boron target in a low-energy proton synchrotron and hope that you get fusion more often than you scatter the protons out of the beam. But that won't work either.