Improved training in paraffin-wax impregnated Nb3Sn Rutherford cables demonstrated in BOX samples
Improved training in paraffin-wax impregnated Nb3Sn Rutherford cables demonstrated in BOX samples
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BOX 样品中展示了石蜡浸渍 Nb3Sn 卢瑟福电缆的改进培训
DOI：
10.1088/1361-6668/ac6123
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
H. T. ten Kate
中科院分区：
文献类型：
--
作者：
M. Daly;B. Auchmann;A. Brem;C. Hug;S. Sidorov;S. Otten;M. Dhallé;Zichuan Guo;A. Kario;H. T. ten Kate
众所周知，树脂浸渍高场 Nb3Sn 型加速器磁体需要大量的培训活动，甚至在热循环或电磁循环后可能会表现出限制性能的缺陷。为了有效地探索这种行为的技术解决方案并评估各种浸渍材料组合和表面处理，开发了粘合实验 (BOX) 样品。 BOX 提供了一个短样本测试平台，具有与磁体相关的洛伦兹力，并展示了相关培训。在这里，我们报告了 BOX 样品的比较行为，这些样品包含相同的 Nb3Sn 卢瑟福电缆，但用高场磁体中使用的常见树脂或不太传统的石蜡浸渍。值得注意的是，两个石蜡浸渍的 BOX 样品无需训练即可达到临界电流，并且对热循环和机械循环也具有弹性。这些相当令人鼓舞的结果与树脂浸渍样品获得的结果形成鲜明对比，树脂浸渍样品显示出广泛训练的特征，最多勉强达到其临界电流值。
Resin-impregnated high-field Nb3Sn type of accelerator magnets are known to require extensive training campaigns and even may exhibit performance-limiting defects after thermal or electromagnetic cycling. In order to efficiently explore technological solutions for this behaviour and assess a wide variety of impregnation material combinations and surface treatments, the BOnding eXperiment (BOX) sample was developed. BOX provides a short-sample test platform featuring magnet-relevant Lorentz forces and exhibits associated training. Here we report on the comparative behaviour of BOX samples comprising the same Nb3Sn Rutherford cable but impregnated either with common resins used in high-field magnets, or with less conventional paraffin wax. Remarkably, the two paraffin wax-impregnated BOX samples reached their critical current without training and are also resilient to thermal and mechanical cycling. These rather encouraging results strongly contrast to those obtained with resin impregnated samples, which show the characteristic extensive training and at best barely reach their critical current value.