Effect of magnetic confinement technique on plasma radiation characteristics

To improve the quality of laser-induced breakdown spectroscopy, the effects of magnetic confinement on plasma were studied, which was excited by Nd: YAG laser. The experimental results show that plasma radiation intensity increased with increasing magnetic field under the same laser energy. By calculating, we can see that the spectral line intensity of Al, Ba, Fe and Ti increased about 52.35%, 46.64%, 64.01% and 51.73% under 0.5 T magnetic field, the spectral signal-to-noise ratio increased about 45.44%, 69.64%, 40.26% and 41.33%, while the electron temperature and electron density of plasma was heightened by 1 355.01 K and 0.531016 cm-3, respectively, as compared to those with no magnetic confinement. It is clear that using magnetic confinement is an effective measure for the enhancement of spectrum quality.