Superconducting wires under simultaneous oscillating sources: involved magnetic response, dissipation of energy and low pass filtering

TL;DR

This paper uses numerical simulations to analyze how superconducting wires respond to simultaneous oscillating currents and magnetic fields, revealing complex dissipation, magnetic distortions, and a natural low pass filtering effect.

Contribution

It provides detailed simulation results of superconducting wires under combined AC sources, highlighting non-homogeneous dissipation and intrinsic filtering effects not captured by traditional models.

Findings

Non-homogeneous energy dissipation observed

Significant deviations from traditional AC-loss formulas

Intrinsic low pass filtering effect identified

Abstract

Numerical simulations of filamentary type II superconducting wires under simultaneous AC transport current and oscillating transverse magnetic fields are performed within the critical state approximation. The time dependences of the current density profiles, magnetic flux lines, local power dissipation and magnetic moment are featured. Noticeable non-homogeneous dissipation and field distortions are displayed. Also, significant differences between the obtained AC-losses and those predicted by regular approximation formulas are reported. Finally, an outstanding low pass filtering effect intrinsic to the magnetic response of the system is described.