Spectroscopic, imaging, and probe diagnostics of laser plasma plumes expanding between confining surfaces
作者： P. Yeates , E. T. Kennedy
DOI: 10.1063/1.3505801
关键词:
摘要: Laser plasma plumes were generated in aluminum rectangular cavities of fixed depth (6 mm) and varying height (2.0, 1.5, 1.0 mm). Space time resolved visible emission spectroscopy, gated intensified imaging, Langmuir probe diagnostics utilized to diagnose the evolution confined comparison freely expanding plume from ablation a planar target. The constrained behavior displayed multiphase history. Early stage interactions (t 160 ns) resulted sustained “decay,” i.e., rapid termination continuum emission, concert with decreases peak electron density (Ne) temperature (T). This later phase originates loss mechanisms which bleed thermal energy charged particles. These increase magnitude as duration ...
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