Using a 2-D/3-D mixed electrothermal model, the quench behavior of an YBa2Cu3O7-δ (YBCO) pancake magnet is investigated for operating temperature 30-65 K. From many simulations, it is found when the hot spot temperature Tpeak rises to the range [120 K, 300 K], both Tpeak and the normal zone length LNZ behave like exponential functions of the longitudinal normal zone propagation velocity (NZPV), as the YBCO pancake magnet is quenched by a disturbance energy (DE) equal to or greater than the minimum quench energy (MQE). The exponential law of Tpeak versus NZPV, as well as LNZ versus NZPV, is not obviously affected by the heat disturbance parameters as DEs = MQEs. Similarly, the temperature rising rate dTpeak/dt can be regarded as a function of Tpeak in [120 K, 300 K] and is not significantly affected by heat disturbance parameters as DEs = MQEs. These characteristics have potential usage in the formulation of quench detection/protection schemes of HTS YBCO pancake magnets.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering