Arc expansion in xenon flashlamps

摘要: Plasma arcs in large diameter (d>1 cm) xenon flashlamps often do not completely fill the bore of discharge tube. The arc is usually initiated on one side tube, adjacent to ground plane, and fraction tube filled with plasma varies as a function axial location. A model presented that describes, from first principles, expansion flashlamps. simultaneously solves coupled set one‐dimensional transport equations different regions simulate two‐dimensional effects hydrodynamics, electron kinetics, radiation transport. Using this method, at arbitrary locations within can be studied. Arc filling fractions are found decrease increasing pressure xenon, decreasing stored energy circuit. also decreases breakdown filament moves away axis towards wall. slowed ultimately halted by lowered E/N (electric field/gas density) gas exterior arc, rapid conversion atomic ions molecular their subsequent recombination, efficient manner which dissipates might otherwise available for thermodynamicexpansion arc. asymmetric results heating inside wall calculated model. growth part responsible changes spectrum emitted various angles observation. This effect wavelength‐dependent absorption coefficients plasma.