J D Lawson 1957: n tau T >= 3 x 10^21 m^-3 s keV (D-T fusion); plasma-energy gain Q = P_fus / P_input >= 1 break-even; ITER design Q=10; NIF inertial Q=1.5 in 2022.
J D Lawson 1957: n tau T >= 3 x 10^21 m^-3 s keV (D-T fusion); plasma-energy gain Q = P_fus / P_input >= 1 break-even; ITER design Q=10; NIF inertial Q=1.5 in 2022.