High energy densities Cutting torch 18 Cavity resonators 14 Plasma temperature 14 Nozzles 10 Plasma jets 10 Plasmas 10 Nozzle exits 8 Plasma density 8 Plasma diagnostics 8 Arc plasma 4 Arc temperature 4 Bandpass filters 4 Electron temperature 4 Fluid dynamics 4 Focal Plane 4 Gray-level 4 High energy physics 4 Hydrodynamic instabilities 4 Ion currents 4 Ions 4 Langmuir probes 4 Light fluctuation 4 Light sensor 4 Magnetrons 4 Mass flow rate 4 Nozzle wall 4 Numerical code 4 Observation planes 4 Oxygen 4