Lawson triple product: nτT ≥ 3·10²¹ keV·s/m³ for DT ignition at T ≈ 10-25 keV

Lawson (1957) power-balance criterion for self-sustained fusion: the plasma density n, energy-confinement time τ_E, and ion temperature T must satisfy n·τ_E·T ≥ 12·T²/(⟨σv⟩·ε_α), which bottoms out for deuterium-tritium (ε_α = 3.5 MeV) at T…