(Color online) Experimental setup. Side imaging and LIDAR detection of a filament-induced lead plasma.
Spectra of filament-induced lead plasma with delay times of (a) and (b) , respectively.
Partial energy diagram of Pb I and corresponding transition wavelengths.
Spectrum of the filament-induced lead plasma with a delay time of (dotted) and multipeak Lorentzian fitting (solid lines). The Stark broadening profile of Pb I at was used for the determination of the electron density.
Electron densities of the lead plasma as a function of delay time.
(a) Typical Boltzmann plot obtained with a delay time of and (b) plasma temperature as a function of delay time.
Spectra recorded with a LIDAR configuration. The sample is located at (a) , (b) , (c) , and (d) away from the focal lens. For all cases, the gate widths are and the delay times are (with regard to the laser arriving time on the target).
Single-shot spectrum of the lead plasma obtained with a delay time, gate width, grating, and a gain of 200.
Extrapolation of the single-shot detection limit.
The spectral lines used for calculating the plasma temperature of the filament-induced breakdown plasma.
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