Pulsed magnetization processes for HTS bulk components

Magnetizntion 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, nod the shapes remanent magnetization are discussed rn 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.