摘要: Plasma diagnostics tools play an essential role in measurements of plasma parameters. The diagnostics tools are widely employed in various plasmas to measure electron density, electron energy distribution function, particle density, electric field, and so on. Moreover, diagnosing plasmas allows us to follow practical observations of physical processes inside the plasmas. This seminar will introduce the basic concepts of spectroscopic methods as one of the most powerful diagnostics tools. The experimental techniques associated with optical emission spectroscopy and laser-aided diagnostics will be presented. Finally, the results of laser Thomson scattering measurements will be explained in two different areas of plasmas in terms of temperature and density: low-temperature industrial plasmas and high energy plasmas which appear as laser-produced plasmas in laboratory space science.