Arc plasma Cutting torch 8 Nozzles 8 Density profile 6 Ion-current signal 6 Oxygen cutting 6 Plasma diagnostics 6 Plasmas 6 Saha equation 6 Axisymmetric 4 Chemical equilibriums 4 Density of gases 4 Dynamics 4 Electron temperature 4 Equations of state 4 Experimental observation 4 Gas density 4 Gas density measurement 4 Heavy particles 4 High energy densities 4 High-energy densities 4 Insulating film 4 Kinetic equilibrium 4 Local thermodynamic equilibrium 4 Non destructive 4 Nonequilibrium plasmas 4 Nozzle exits 4 Nozzle orifice 4 Nozzle wall 4 Phase equilibria 4