Fusion Reactors and Helium
Are there any fusion reactors in the process of use or
being built to work with the possiblity of helium 3 for fuel?
Since the fusion cross section for He 3 is smaller than for deuterium and
tritum, it is not where people start. The next step would likely be deuterium,
deuterium, avoiding the extra neutron. You might check with Princeton Plasma
Physics Lab to see status of this. But the probable answer is "not yet".
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Update: June 2012