Space-resolved diagnosis for the electron density of laser-produced aluminum plasma

The K-shell emission lines of laser-produced aluminum plasma were measured by the space-resolved spectrometer, which was constructed by a flat crystal spectrometer with a 20 μm-wide slit. The electron density profile beyond the critical density is obtained by fitting the Stark-broadened line wings of hydrogenic ions, then the diagnostics on high electron density has been developed tentatively.