A two-dimensional model of He/O2 atmospheric pressure plasma needle discharge |
Total ionization rates (including R3–R5, R28, R36, and R37) of needle plasma at (a) 10 ns, (b) 14 ns, (c) 18 ns, and (d) the axial profiles of electron and positive ion densities, and the electric fields in the vicinity of the sheath at 14 ns. |