Quench characteristics and normal zone propagation of an MgB_2 superconducting coil

摘要

We have studied experimentally the quench characteristics and normal zone propagation of Cu-Ni sheathed MgB_2 superconducting monofilament tape. The quench dynamical process and the stabilities, i.e. minimum quench energy (MQE) and normal zone propagation velocity nu_p are investigated through the double-solenoid experiment at 4.2 K. By measuring the MQE and nu_p of MgB_2 tape, we derive the dependence of MQE and nu_p on transport current and magnetic field.