Comparison of nonintensified and intensified CCD detectors for laser-induced breakdown spectroscopy.
The performance and sensitivity of an intensified CCD array system and a nonintensified CCD array detector system are compared for laser-induced breakdown spectroscopy (LIBS). LIBS measurements were recorded in a calcium-based aerosol-seeded gas stream at ambient pressure. The signal-to-noise ratio based on the 393.37-nm calcium emission line was calculated as a function of detector delay with respect to the plasma-initiating laser pulse. Both ensemble-averaging and single-shot spectral analyses were performed. For all conditions, the intensified CCD system provided an enhanced signal-to-noise ratio compared with the nonintensified CCD system.
University of Florida, Gainesville, Florida 32611, USA.
Jorge E
JE
Carranza
Emily
E
Gibb
Ben W
BW
Smith
David W
DW
Hahn
James D
JD
Winefordner