Spatiotemporal evolution of excitation temperature of vacuum arcs by tomography

The excitation temperature is crucial for understanding the dynamic processes of a vacuum arc. traditional methods based on optical emission spectroscopy can only provide 1D or 2D distribution. Due to absorption effect, it difficult obtain accurate information about radiation emitted by This result in measurement errors even lead incorrect conclusions. To address these issues, we developed 3D tomography reconstruction algorithm that takes effect into account. method reconstructed coefficients arc and calculated from spectral line ratios. Absorption are then using Kirchhoff's law integrated along paths determine depths. Finally, was corrected depth Beer–Lambert law. results indicate that, under axial magnetic field, radially nonuniform deviates axisymmetric After considering values would increase deviations related position. Additionally, increments across slice comparable each other.