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Neutron energy spectrum determination by multi-foil activation method in the gekko XII laser inertial fusion experiment

Tetsuo Iguchi, Masao Chaki, Masaharu Nakazawa, Noriaki Miyanaga, Sadao Nakai1989年Fusion Engineering and DesignIF 1.7出版社

AbstractA multi-foil activation method is applied to neutron measurement in the Gekko XII laser inertial fusion experiment. The total neutron yield is determined by using several threshold activation detectors, where the practical efficiencies have been estimated with a Monte Carlo neutron transport calculation in a detailed model of the experimental assembly. The neutron spectra over a wide energy range are also determined through their adjustment techniques using the multi-foil activation data. In particular, the new application to the fuel areal density (〈pR〉) measurement based on this method is introduced and is discussed on the expected measurement accuracy.

日本語訳

多箔放射化法を、Gekko XIIレーザー慣性核融合実験における中性子計測に適用した。全中性子収量は、複数のしきい値放射化検出器を用いて決定され、実用的な効率は、実験体系の詳細モデルにおけるモンテカルロ中性子輸送計算によって評価された。また、多箔放射化データを用いた調整手法により、広いエネルギー範囲にわたる中性子スペクトルが決定される。特に、この方法に基づく燃料面密度(〈ρR〉)測定への新たな応用について紹介し、期待される測定精度について議論する。

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