Double-pulse laser-induced breakdown spectroscopy of magnesium in water has been performed with different jet thicknesses. A Meinhard nebulizer has been used to create a jet of 0.3-mm diameter, whereas a homemade liquid jet injector produced a thicker jet of 1.0-mm diameter. The relationship of line intensity to delay time between the two laser pulses for these two jets is compared and discussed. The limits of detection in these two jets are also determined and compared. The line intensity observed from the double-pulse measurement is correlated with the measured electron density calculated with the H<sub>α</sub> line. Also, the behavior of plasma density relative to time delay between the lasers is described.
© 2003 Optical Society of America
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(140.3440) Lasers and laser optics : Laser-induced breakdown
(300.2140) Spectroscopy : Emission
(300.6210) Spectroscopy : Spectroscopy, atomic
(300.6360) Spectroscopy : Spectroscopy, laser
Akshaya Kumar, Fang Y. Yueh, and Jagdish P. Singh, "Double-Pulse Laser-Induced Breakdown Spectroscopy with Liquid Jets of Different Thicknesses," Appl. Opt. 42, 6047-6051 (2003)