Stability against the frictional motion of conductor in superconducting windings

An experiment was performed to investigate quenches of superconducting wires caused by conductor motions. In the experiment, the disturbance energies of conductor motions causing quenches were measured. The conductor moved in a series of step motions, which was demonstrated by the acoustic emission (AE) measurement. A disturbance where the conductor moved at three spacers caused a quench, whereas a conductor motion at one spacer did not trigger a quench. Experimental data are compared to the values derived from the theory, which quantitatively estimate the size of the conductor motion. The theory estimates the disturbance energy quite well.