For the typical physics states of the laser plasma, it is difficult to obtain the plasma parameters directly. Spectroscopic diagnostics play an important role in the field of plasma diagnostics.

This dissertation stresses the experimental studies on Z-pinch plasma diagnostics and radiation characteristic. We have finished four items of work: (1) Constructing a small-scale Z-pinch device;

In this paper the temperature of underwater welding arc is investigated systematically by means of spectral diagnostics of plasma.