Flux-pumped ultra-high current magnets

该项目主要由库姆斯博士领导的研究小组在剑桥大学进行。该研究旨在解决超高场磁体开发的基础研究，这将有助于推进对新材料的研究并进一步了解现有材料。超导技术可用于提高对奇异物质状态的高级研究的效率和性能。虽然已经使用混合铜和超导磁体产生高达45 T的持续磁场，但它们体积庞大且运行昂贵。实现大于45 T的场可以作为瞬变来实现，但是在持久模式中产生这样高的场的唯一方法是使用HTS。该项目将有助于提供实现高磁场所需的高电流。磁通泵超高电流磁体有可能以相对成本有效的方式产生超过近20年来直流磁场中45 T的磁场记录。这些更高的领域无疑将需要能够承载数千安培的超导电缆和输送这些非常高电流的方法。可以使用电流引线，但是在数千安培的几十安培的电流下，它们代表非常高的成本和加热开销。更高的电流意味着更低的导体成本、更低的磁体电感、更短的充电时间和更低的失超电压。与昂贵的大电流电源和温-冷电流引线相比，磁通泵技术和最新的动态电桥开关方法将是以最小的热负荷和最小的基础设施提供这些大电流的关键。由此产生的效果是，高场磁体的购买和运行成本将大幅降低。至关重要的是，基础设施成本也将大幅削减。

The project is primarily carried out at Cambridge University by the research team led by Dr Coombs. The research is constituted to address fundamental underpinning research into the development of ultra-high field magnets that will help to advance research into novel materials and to further understand existing ones. Superconducting technology can be used for improving the efficiency and performance of advanced research into exotic states of matter. Although persistent magnetic fields as high as 45 T have been produced using hybrid copper and superconducting magnets they are bulky and expensive to run. Achieving fields greater than 45T can be achieved as transients but the only way to produce such high fields in persistent mode is with HTS. This project will facilitate the provision of the high currents which are required to achieve high fields.Flux pumped ultra-high current magnets have the potential to produce fields which surpass the nearly 20 year old record of 45 T in a DC field Bitter magnet in a relatively cost effective manner. These higher fields will undoubtedly require superconducting cables capable of carrying thousands of amps and the means to deliver those very high currents. Current leads could be used but at currents in the 10s of thousands of amps they represent a very high cost and heating overhead. Higher currents mean lower conductor cost, lower magnet inductances shorter charging times and lower quench voltages. Flux pump technology and the latest dynamic bridge switching method will be key to providing these high currents with minimal heat loads and minimal infrastructure in comparison to expensive high-current power supplies and warm-to-cold current leads. The resultant effect is that the purchase and running costs of high-field magnets will decrease substantially. Crucially also infra-structure costs will be slashed.