> Igniting this p–11B fuel would require temperatures of about a billion kelvin, It's also _impossible_ to reach break-even with p-11B in _any_ reactor design

> Igniting this p–11B fuel would require temperatures of about a billion kelvin, It's also _impossible_ to reach break-even with p-11B in _any_ reactor design based on known concepts (with one exception [1]). This result, among other no-go results regarding non-Maxwellian fusion, was a major point in Todd Rider's PhD thesis: "Fundamental limitations on fusion systems not in equilibrium", PhD Dissertation (MIT), Todd Rider, 1995. http://dspace.mit.edu/bitstream/1721.1/11412/1/33227017.pdf http://dspace.mit.edu/bitstream/1721.1/11412/1/33227017.pdf (When it comes to reducing neutron flux in fusion reactors, the smart money is on d-3He. Everything else has too small of a cross-section.) [1]: Ultradense matter represents one of the few loopholes identified by Rider which might actually be achievable. However, Rider did not attempt to confirm its feasibility; it simply wasn't relevant to that particular paper, and there is a very good argument that fusion in ultradense matter is nothing like "known" physics.