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首页> 外文期刊>Physica, C. Superconductivity and its applications >Pinning mechanism and engineering critical current density considerations in the design of MgB(2)superconducting coils
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Pinning mechanism and engineering critical current density considerations in the design of MgB(2)superconducting coils

机译：MGB（2）超导线圈设计中的固定机理和工程临界电流密度考虑

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摘要

Superconducting coils are designed for the generation of specified magnetic fields (low, intermediate, or high). To function in different field regimes, it is important to analyze the pinning mechanics and the types of pinning centers in the superconductor in a precisely defined magnetic field. Correct identification of pinning centers would allow for the formulation of approaches to increase the critical current density and critical magnetic field, ultimately making it possible to reduce the cost of producing superconducting coils (with smaller amounts of wire needed). This paper will present a method to analyze pinning centers in MgB2 superconductor wires in low, intermediate, and high magnetic fields at 4.2 K, 20 K, 25 K, and 30 K. This method allows us to elucidate the influences of doping, isostatic pressure, and reduction of the wire diameter on individual pinning centers in a specific magnetic field. In this article, we also show a method to analyze the types of pinning centers and their impact on the engineering critical current density (J(ec)). This method not only allows for the identification of the types of pinning centers, but also identifies which type allows for a shift in the J(ec) criterion of 100 A/mm(2) to enable higher magnetic fields.
机译：超导线圈设计用于产生特定磁场（低，中间或高）。在不同的场地中运行，重要的是在精确定义的磁场中分析超导体中的钉扎力学和钉扎中心的类型。钉扎中心的正确识别将允许制定增加临界电流密度和临界磁场的方法，最终使得可以降低生产超导线圈的成本（具有较小量的电线所需的电线）。本文将介绍一种在4.2k，20k，25k和30k的低，中间和高磁场中分析MgB2超导线中的循环中心的方法。该方法允许我们阐明掺杂，等静压的影响并且在特定磁场中的单个钉扎中心的线径降低。在本文中，我们还显示了一种分析钉扎中心类型的方法及其对工程临界电流密度的影响（J（EC））。该方法不仅允许识别钉扎中心的类型，而且还识别哪种类型允许在100a / mm（2）的j（ec）标准中的换档以实现更高的磁场。

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