Superconducting Properties and Microstructure of In-situ Cu Addition Low Activation MgB<sub>2</sub> Multifilamentary Wires Using Different Boron-11 Isotope Powders

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  • 異なるホウ素-11 同位体粉末を用いた Cu 添加低放射化 MgB<sub>2</sub> 多芯線の超伝導特性と微細組織
  • 異なるホウ素-11 同位体粉末を用いた Cu 添加低放射化 MgB2 多芯線の超伝導特性と微細組織
  • コトナル ホウソ-11 ドウイタイ フンマツ オ モチイタ Cu テンカ テイホウシャカ MgB ₂ タシンセン ノ チョウデンドウ トクセイ ト ビサイ ソシキ

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<p>MgB2 compound is one of the low activation superconducting materials because the half-life time of the MgB2 phase is much shorter than that of the Nb-based superconductors, such as Nb-Ti and Nb3Sn. The natural boron powder as the boron source of the in-situ MgB2 wire and bulk consists of two kinds of stable isotope materials, which are B-10 (10B:19.78 %) and B-11 (11B: 80.22 %) isotopes. The 11B isotope is a promising raw material for the further improvement of the neutron irradiation effect on the low activation MgB2 wire. This study focused on the quality effect of the 11B isotope raw powder on the superconducting properties of the 11B isotope-originated MgB2 (Mg11B2) wire. We found that the nano-order particle size and the higher purification of the 11B isotope raw powder would be efficient in the improvement of the superconducting properties of the low activation Mg11B2 wire.</p>

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