Cu

The analysis of double-pulse LIBS plasmas is a promising technique for environmental neutral under-water material exploration. Since the required spectra analysis method or suitable calibration curves have barely been investigated for deep-sea applications, a method for spectra simulation and evaluation was developed, enabling evaluation of the elemental concentrations even at non-atmospheric conditions.

The data correspond to the results of modelling studies of DC electric arcs at a current of 2 A in air with admixture of copper metal vapour. Experimental findings are used to adjust input parametrs of the model in order to achieve a good match. The simulations are performed strating with a discharge burning with a minimum gap length of 30 µm for a physical time of 11 ms. Then, the separation of the electrodes is followed for further 51 ms and the discharge gap is increased up to 3 mm. The comparision of experimental and modelling data is based on the measured arc voltage.