We have reported in a series of publication the generation of secondary plasma having very low continuous emission background and additional characteristics favorable for spectrochemical analysis. Our further experiments reveal that the shock wave generated by the primary plasma is responsible for the formation of the secondary plasma as well as the excitation of the target atoms. Meanwhile we have also developed its application for in-situ analysis of large metallic surfaces in industry. In our continuing effort to deepen our understanding of the dynamical process of secondary plasma formation as well as to broaden its range of application and improve its practically including its portability, we are currently undertaking the following major projects :
- Dynamical study of the mechanism for laser plasma generation at the surrounding gas pressure ranging from 1 Torr to 1 atm. In this study we seek to verify the shock wave plasma model that we proposed earlier, using a specially developed method obtained by combining the time-resolved spectroscopy measurement of emission spectra with the simultaneous detection of density jump by means of rainbow interferometer. In addition to neutral atom emission, the contribution of recombination process to the emission spectrum will also be investigate.
- Extension of its application on solid targets to liquid samples for the purpose of environmental or pollution monitoring and evaluation which is urgently needed by this country. This project is being carried out along with the continued improvement of the in-situ analysis using small chamber for the purpose of industrial inspection.
- The study of thin film production using laser ablation technique and develop the new method for powder analysis using confinement system on glass chamber. This project is carried out to produce a good thin film production and to make analysis about plasma of thin film.
- Mineral, rock, concrete, fossil, gemstones, meteorite, wood and medical plants analysis.