Abstract
One of the spectroscopy method, which can determine constituent in material, is Laser-Induced Breakdown Spectroscopy (LIBS). LIBS is an atomic emission method that uses radiation pulses from the high energy laser. LIBS allows the detection of spectral lines of elements present in the excited sample. In this present research, a pulse Nd: YAG laser with 1064 nm wavelength was used in LIBS system to the analysis of concrete elements. Spectrum analysis of calcium element in concrete was performed to understand the characteristics of generated laser plasma. Characteristics of laser plasma were shown through energy and pulse repetition rate laser variations. Using the higher energy laser, the larger plasma diameter was made. Furthermore, the graphs show increment in intensity and peaks, which have better sharpness. The laser repetition rate does not affect the size of the plasma, but the greater frequency of laser shots cause the lower emission intensity.
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