Abstract
<p>MgB<sub>2</sub> compound is one of the low activation superconducting materials because the half-life time of the MgB<sub>2</sub> phase is much shorter than that of the Nb-based superconductors, such as Nb-Ti and Nb<sub>3</sub>Sn. The natural boron powder as the boron source of the in-situ MgB<sub>2</sub> wire and bulk consists of two kinds of stable isotope materials, which are B-10 (<sup>10</sup>B:19.78 %) and B-11 (<sup>11</sup>B: 80.22 %) isotopes. The <sup>11</sup>B isotope is a promising raw material for the further improvement of the neutron irradiation effect on the low activation MgB<sub>2</sub> wire. This study focused on the quality effect of the <sup>11</sup>B isotope raw powder on the superconducting properties of the <sup>11</sup>B isotope-originated MgB<sub>2</sub> (Mg<sup>11</sup>B2) wire. We found that the nano-order particle size and the higher purification of the <sup>11</sup>B isotope raw powder would be efficient in the improvement of the superconducting properties of the low activation Mg<sup>11</sup>B<sub>2</sub> wire.</p>
| Translated title of the contribution | 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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| Original language | Japanese |
| Pages (from-to) | 31-38 |
| Number of pages | 8 |
| Journal | 低温工学 = Cryogenic engineering |
| Volume | 57 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2022 |