Feasible study on quench back with high-resistive sheets between turns

超导磁体失超保护通常采用外接转储电阻。关断时的较高电压是较大磁体中的问题。因此，提出了用导电片代替匝间绝缘的DC磁体。它的可用性失超保护的内部转储，这是所谓的“淬火回”。在低温下测量了Al_2O_3与TiC、SiC以及环氧树脂与导电填料的导电率。它们的值是可以接受的，但它们与导体之间的接触电阻必须加以改善，以供实际使用。这种方法的可能应用于大型磁体进行了检查与分析代码的线圈温度在电流关断。

External dump resistors are usually adopted for quench protection of superconducting magnets. The higher voltage at shut-off is a problem in the larger magnets. Therefore, DC magnets, in which turn-to-turn insulation is replaced by conductive sheets, is proposed. Its availability for quench protection by internal-dump, which is called 'quench back', is investigated. The resistivities of the candidates such as Al_2O_3 with TiC, SiC, and epoxy resins with conductive filler are measured at low temperatures. Their values are acceptable, but the contact resistance between them and conductors must be improved for the actual use. The possible application of this method to large-scale magnets was examined with an analysis code for the coil temperatures at the current shut-off.