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照射損傷評価のための遠隔操作式振動試料型磁力計の開発

Development of remote operated vibrating sample magnetometer for evaluation of irradiation damage

高屋 茂; 山県 一郎; 市川 正一; 永江 勇二; 若井 栄一; 青砥 紀身

Takaya, Shigeru; Yamagata, Ichiro; Ichikawa, Shoichi; Nagae, Yuji; Wakai, Eiichi; Aoto, Kazumi

中性子照射試験片用に遠隔操作式振動試料型磁力計(VSM)を開発した。最大印加磁界範囲は$$pm$$0.5/$$mu_0$$A/m以上であり、磁気モーメントの測定精度は、5$$times$$10$$^{-8}$$A$$cdot$$m$$^{2}$$以上である。中性子照射試験片の磁化曲線を本VSMを用いて測定し、代表的な照射損傷指標である弾き出し損傷量と、保磁力等の磁気特性の関係を調べた結果、両者には良い相関があることが示された。このことは、VSMを用いた照射損傷の非破壊評価の可能性を示している。

The remote operated vibrating sample magnetometer (VSM) for neutron irradiated samples has been developed. The maximum range of applied magnetic field is more than $$pm$$0.5/$$mu_0$$A/m, and the resolution of magnetization is higher than 5$$times$$10$$^{-8}$$A$$cdot$$m$$^{2}$$. The hysteresis loops of neutron irradiated samples were measured by this VSM, and the relationships between dose, which is one of representative irradiation parameter, and magnetic properties such as magnetic coercive force were examined. As result, it was revealed that there are good correlations between them. This fact shows the possibility of nondestructive evaluation of irradiation damage by using VSM.

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