Quench Behaviors of Monofilament Iron-Based Sr0.6K0.4Fe2As2 Tape With Ag Sheath at Different Temperatures

For practical application, stability investigations of Sr
_0.6
K
_0.4
Fe
₂
As
₂
conductors are of great importance. In this paper, quench development and propagation in Ag sheath are experimentally and numerically investigated. Measurements are performed as a function of transport current for several operating temperatures between 19 and 35 K. This work focuses on the evaluation of quench development and the estimation of normal zone propagation velocity (NZPV) and minimum quench energy (MQE). The experimentally obtained temperature dependence of NZPV is compared with a simplified adiabatic model. In addition, the NZPV and the MQE of the sample are compared with those of a low-temperature superconductor (LTS) and a high-temperature superconductor (HTS). According to the results, the basic quench characteristics fit between those of LTS and HTS materials.