I know this is now a pretty dead thread, but just FYI: you're again looking at the comparison of power output to "power absorbed by the particles to be fused," not power output to overall system power input.
All the fusion people are so far from being energy positive to overall system power input, and so far from even trying to get to that milestone, that it's a little hard to find articles that talk about the power input to the whole system. But, to use wikipedia, here's a link:
Note that they talk about Q. JET claims a Q of approximately 0.7. Q=1 is what you're talking about -- more energy out of the particles than is absorbed by the particles. Q=5 is potentially self-sustaining -- because, in this case, only 20% of the energy out is in a form that can create more fusion reactions. The article suggests Q=10 as the minimum for overall power output. My guess is that Q=10 is wildly optimistic for that.
All the fusion people are so far from being energy positive to overall system power input, and so far from even trying to get to that milestone, that it's a little hard to find articles that talk about the power input to the whole system. But, to use wikipedia, here's a link:
http://en.wikipedia.org/wiki/Joint_European_Torus
Note that they talk about Q. JET claims a Q of approximately 0.7. Q=1 is what you're talking about -- more energy out of the particles than is absorbed by the particles. Q=5 is potentially self-sustaining -- because, in this case, only 20% of the energy out is in a form that can create more fusion reactions. The article suggests Q=10 as the minimum for overall power output. My guess is that Q=10 is wildly optimistic for that.