Quench characteristics and normal zone propagation of an MgB2superconducting coil

We have studied experimentally the quench characteristics and normal zone propagation of Cu–Ni sheathed MgB2 superconducting monofilament tape. The quench dynamical process and the stabilities, i.e. minimum quench energy (MQE) and normal zone propagation velocity vp, are investigated through the double-solenoid experiment at 4.2 K. By measuring the MQE and vp of MgB2 tape, we derive the dependence of MQE and vp on transport current and magnetic field.