Fusion reactivities with drift bi-Maxwellian ion velocity distributions

Abstract The calculation of fusion reactivity involves a complex six-dimensional integral that takes into account the cross section and velocity distributions two reactants. However, more simplified one-dimensional form can be useful in certain cases, such as for studying yield or diagnosing ion energy spectra. This simpler has been derived few special combination Maxwellian distributions, beam-Maxwellian combination, beam-target greatly reduce computational costs. In this study, it is shown drift bi-Maxwellian reactants with different velocities, temperatures, anisotropies also reduced to form, unifying existing derivations single expression. result used investigate potential enhancement due beam temperature anisotropies. For relevant parameters energy, factor larger than 20%, which particularly significant proton-boron (p–B11) fusion, have impact on Lawson gain criteria.