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Energetic and angular characteristics of the reacting deuterons in a plasma focus

I Tiseanu, N Mandache, V Zambreanu1994年Plasma Physics and Controlled FusionIF 2.2出版社

A model for the angular distribution of the neutron emission is derived and parametrized. This enables us to apply fitting procedures to the experimental data of the anisotropy of the neutron fluence, which furnish the mean energy and angular characteristics of the reacting deuterons. To this end the angular distributions of the neutron fluence were measured with high accuracy, on every shot the relative statistical errors being below 3-4%. At the same time, based on direct measurements of axially emitted ion energy spectra, we found a realistic distribution function for the reacting deuterons and an analytical expression for the anisotropy of the neutron fluence. The most important result provided by this method applied on a low energy plasma focus device is that medium-energy deuterons (50-100 keV) with a relatively broad angular distribution are responsible for most of the neutron yield.

日本語訳

中性子放出の角度分布に対するモデルが導出され、パラメータ化される。これにより、中性子フルエンスの異方性の実験データにフィッティング手順を適用することが可能となり、反応する重陽子の平均エネルギーと角度特性が得られる。この目的のため、中性子フルエンスの角度分布は高精度で測定され、各ショットにおいて相対統計誤差は3〜4%未満であった。同時に、軸方向に放出されたイオンエネルギースペクトルの直接測定に基づき、反応する重陽子の現実的な分布関数と、中性子フルエンスの異方性に対する解析的表現が見出された。この方法を低エネルギープラズマフォーカス装置に適用して得られた最も重要な結果は、比較的広い角度分布を持つ中エネルギー重陽子(50〜100 keV)が中性子収量の大部分を担っているということである。

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