Mathematical Description of Feedback

The role of chain carriers in fusion reaction kinetics

“…To simplify the problem, we shall describe the rate equation at a point-in-space implying, therefore, a localized or spatial average description. This formulation is essentially analogous to that widely used in the dynamic analysis of fission reactors known as point-kinetics [9]; though its limitation to more realistic space-dependent dynamics characterization is known, such point-reactor analyses are most essential and broadly useful in the identification of fundamental physical trends of nuclear reactor dynamics.…”

“…which proceeds at the rate (9) where (av)^ is the conventional reaction parameter suitably averaged over the ion energy distribution with ion relaxation times taken into account; it is a function of the plasma temperature. It may be emphasized that <ov> should in fact represent the 'time-averaged' <av> rather than the more common time-independent <av>, such as a Maxwellian <ov>.…”

“…( 4) by introducing the symbol ^. Then, of the four channels, only that one which yields two alpha particles of different energies, 4 He° (7.15 MeV) and 4 He (1.4 MeV), is relevant because the subsequent 6 Li ( 4 He°, P) 9 Be reaction in Eq. ( 4) is endothermic with Q s -2 .…”