Among possible approaches to fusion energy, we regard the Proton Fast Ignition (PFI) as the most credible. PFI as an alternate route to ignition was triggered by the discovery of ultra-bright beams of protons produced by ultra-intense lasers.
Protons are advantageous to other ion species and electrons. Because of their highest ionic charge-to-mass ratio, they are accelerated most efficiently up to the highest energies. They can penetrate deep into a target to reach the high-density region, where the hot spot is to be formed. And they exhibit a characteristic maximum energy deposition at the end of their range, desirable to heat a localized volume. Thus, Focused Energy Inc. has chosen PFI for the primary pathway to fusion energy.
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