Using Nd:YAG laser (with a wavelength of 1 064 nm and a pulse width of 10 ns) to ablate Cu target to get plasma spectra with different intensities of laser energy, we observe the different changes of CuⅠ and CuⅡ spectra as follows: the intensities of the atomic and ions lines of Cu plasma spectra have different changes with the increase of laser energy.

Four coal samples with different particle size were analyzed at an experiment setup of sufficient parameters,and the spectral lines of calcium ions were used to analysis the plasma temperature together with the distribution of spectrum intensity of different lines.

The arc plasma temperature is about 4 300~4 400K,and the error is about 100K.

The research results show that the current exhibit a saturation effect in the I V curves of plasma signal with increasing voltage in the negative voltage region, and the plasma temperature is higher than the vaporzation temperature of welded.

In this paper, a two-dimensional simulation is performed about the two-temperature plasma flow and heat transfer in a circular tube.

Combined with the overall energy balance equation of the background plasma,the multi energy group equations which evolve the distribution function of α particles during slowing down are employed to perform self consistent numerical investigation of the burining plasma temperature profiles of importance to fusion reactors.