Talk:Fusion ignition

Physics Stub‑class Low‑importance

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Low importance?

Oh, really? On the contrary, it seems to me that fusion ignition is the most important topic in physics today. It's a pity there's such a dearth of information on this. Terry Thorgaard (talk) 19:39, 19 May 2015 (UTC)[reply]

I think Fusion Ignition has already been acheived as there was a news i read in 2016 on facebook. — Preceding unsigned comment added by 182.69.216.168 (talk) 06:38, 21 May 2016 (UTC)[reply]

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Ignition - not really necessary or wrongly defined

It's simply untrue that ignition is a prerequisite for a fusion power plant - at least when we use the definition that ignition is a state when fusion provides all the heating necessary to sustain fusion reactions. It's entirely possible that plasma will require constant heating by external means (microwave, neutral beam injection, etc) while still producing more energy than is expended. It's just that fusion products may leave the reactor too quickly for any significant heating of the core to take place. Such a reactor may be quite inefficient (the fusion energy will have to go through thermal conversion to electricity to be used for plasma heating) but otherwise workable. Additionally, when working with low-neutronic fuels, the efficiency of the cycle described above may rise dramatically when direct conversion becomes available - although it's highly questionable that any low-neutronicity reaction becomes practical for a fusion power plant.