Loss of alpha particles during slowing-down in an axisymmetric tokamak reactor

The containment properties of alpha particles during the slowing-down process in an axisymmetric tokamak reactor are studied by using Monte-Carlo calculations, in which the pitch-anglescattering effects are included. The loss of alpha particles during slowing-down is found to be safely negligible in a pure DT plasma, but increases proportionally to the effective charge number of the plasma and cannot be ignored in a highly contaminated plasma (Zeff > 4), compared with the loss of 3.5-MeV particles.

日本語訳

軸対称トカマク炉における減速過程中のアルファ粒子の閉じ込め特性を、ピッチ角散乱効果を含むモンテカルロ計算を用いて調べた。減速中のアルファ粒子の損失は、純粋なDTプラズマでは安全上無視できる程度であるが、プラズマの実効電荷数に比例して増加し、高汚染プラズマ（Zeff > 4）では、3.5-MeV粒子の損失と比較して無視できないことがわかった。