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Spatially and temporally resolved electron number density measurements in a decaying laser-induced plasma using hydrogen-alpha line profiles

1995; Optica Publishing Group; Volume: 34; Issue: 18 Linguagem: Inglês

10.1364/ao.34.003325

0003-6935

Christian G. Parigger, David H. Plemmons, James W. Lewis,

Plasma Diagnostics and Applications

A Nd:YAG laser was operated at 1064 nm and with 6-ns pulse duration to achieve optical breakdown in gaseous hydrogen at pressures of 150 and 810 Torr. Spatially and temporally resolved laser-induced emission spectra were measured early in the plasma decay. With hydrogen-alpha line profiles, electron number density values were determined along the laser beam plasma in the range 10(19) to 10(16) cc(-1).