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Applications of LIBS and CT-TDLAS to Industrial Processes
THE LECTURE HAS BEEN CANCELLED.
Laser-induced breakdown spectroscopy (LIBS) is an analytical detection technique based on atomic emission spectroscopy to measure the elemental composition, which has been widely applied in the various fields. A new collinear long and short DP-LIBS method (LS-DP-LIBS) was proposed to improve the detection ability and measurement accuracy by the control of the plasma cooling process using the long pulse-width laser radiation. Tunable diode laser absorption spectroscopy(TDLAS) has been widely developed for practical applications. The fast response 2D/3D temperature and concentration distribution measurement method has been developed and applied to various flow fields. The technique is based on a CT method sing absorption spectra of molecules such as H2O. The novel CT algorism using the two or three dimensional polynomials for temperature and concentration distributions was developed to improve the CT reconstruction features. Since CT-TDLAS has a potential of kHz response time, this method enables real-time 2D/3D temperature and concentration measurements. CT-TDLAS has the kHz response time and the method enables the real-time 2D/3D temperature and concentration measurement to be applicable to advanced controls in various industrial processes.
In this study, several applications of LS-DP-LIBS and CT-TDLAS have been demonstrated to apply them for the improvement of industrial processes, such as engines, gas turbines, iron and steel making processes, semiconductor processes, and so on.