Thermal transient response of membrane-structured-superconducting MgB2 detector by using 20-ps pulse laser

We carried out 20-ps pulse laser irradiation experiments to a superconducting MgB2 meander line to understand a thermal excitation and relaxation processes, which are critical for developing as MgB2 neutron detectors. We observed an exponential thermal–relaxation signal, resulting from pulse laser irradiation. The response time was faster than 1 μs, meaning that the detector would be capable of counting events at a rate of more than 106 events per second. The nonequilibrium process was realistically simulated by means of the system of the time-dependent Ginzburg–Landau equation, the Maxwell equation, and the heat diffusion equation.