Pulsed magnetization processes for HTS bulk components

Magnetization experiments using pulsed Cu coils were carried out on YBCO rings employing multi-pulse processes with different peak fields and pulse durations. Trapped magnetic flux profiles were recorded, and the shapes and absolute values of the remanent magnetization are discussed in terms of the dynamics of such pulsed magnetization processes. While Bean´s model with a constant current density J=J_c describes quasi-stationary processes well, in the pulsed magnetization the transient current density clearly exceeds J_c and leads to more complex flux flow effects