Three-Dimensional Micrometer-Scale Modeling of Quenching in High-Aspect-Ratio $\hbox{YBa}_{2}\hbox{Cu}_{3}\hbox{O}_{7-\delta}$ Coated Conductor Tapes—Part II: Influence of Geometric and Material Properties and Implications for Conductor Engineering and Magnet Design

摘要: YBa2Cu3O7-δ (YBCO) coated conductors (CCs) show great promise for applications, but due to a very slow normal-zone propagation velocity (NZPV), quench detection and protection in YBCO magnets may be difficult. Present CCs have been developed with primary focus on maximizing the critical current density elevated-temperature low-field or low-temperature high-field applications. As market magnet applications progresses, it becomes important consider design parameters such as thicknesses properties of all CC components, intent considering quench-related behaviors an integral part conductor processes. Thus, is know impacts behavior. Considering that layer itself order micrometer thickness, behavior must also considered at this scale length. Here, highly accurate experimentally validated micrometer-scale 3-D tape model reported Part I used study how variations geometry material affect behavior, including NZPV, hot-spot temperature, minimum energy. The parametric quantities can most readily modified by manufacturers. Based simulation results, relative sensitivities are calculated identify which impactful implications these results discussed.