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The degradation of the critical current density in a Nb3Sn tape conductor due to parallel and transversal strain

B. ten Haken, H.H.J. ten Kate1993年Fusion Engineering and DesignIF 1.7出版社

AbstractIn order to investigate the influence of mechanical strain on the intrinsic critical density, a tape conductor is selected as a simple two-dimensional model. In a tape geometry a homogeneous strain distribution can be generated with an external load. A new experimental setup is designed to maintain two different components of the strain tensor (transverse and axial) in a superconducting tape. In this experiment the effects of the distortional and the volume strain are separated. The dependence of the direction of the magnetic field on the strain-current relation is measured by changing the orientation of the sample and the press inside the magnet bore. Preliminary three different sample materials (all Nb3Sn) are investigated with an axial strain inside the superconductor.

日本語訳

機械的ひずみが本質的臨界電流密度に及ぼす影響を調査するために、テープ導体を単純な二次元モデルとして選択した。テープ形状においては、外部負荷によって均一なひずみ分布を生成することができる。超伝導テープ内のひずみテンソルの2つの異なる成分(横方向および軸方向)を維持するために、新しい実験装置を設計した。この実験では、体積ひずみと偏差ひずみの効果が分離される。磁場方向に対するひずみ-電流関係の依存性は、磁石ボア内での試料とプレス部の向きを変えることによって測定される。予備段階として、超伝導体内部に軸方向ひずみを有する3つの異なる試料材料(すべてNb3Sn)が調査される。

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