Transition currents, power loss and effective resistance in small superconducting coils

In the experimental part of the work, various small superconducting coils made of hard superconducting materials are energized by linearly increasing currents at rates of change ranging from zero to several thousand amperes per second causing maximum magnetic fields up to several thousand kiloamperes per meter. The energy changes cause the superconducting coils to go to a normal state when the current reaches a "dynamic" transition value. The transition currents are experimentally measured. Further, energy and power dissipated in the superconducting coils are calculated thus enabling the effective resistance of the superconducting coil material to be determined. The knowledge of the effective resistance can contribute to the prediction of the efficiency of energy transfer from superconducting storage coils.