Study on density distribution of high-energy electrons in pulsed corona discharge

In this study, the radial profile of the overall emission intensity of the second positive system (C(3)Pi(u)-->B(3)Pi(g)) emitted from the positive pulse corona discharge of NZ and air in a line-cylinder reactor was successfully recorded against a severe electromagnetic pulse interference coming from the corona discharge at room temperature and 1 atm. The relation between the density distributions of the high-energy electron (whose energy is higher than 11.03 eV and enough to excite N-2 to its C(3)Pi(u) state from the ground state) and the emission profiles is studied with the aid of a reaction radiation rate analysis method. By the relation, it is found that the radial distribution of the high-energy electron decreases nonlinearly with the radial distance from the reactor axis and increases directly with the discharge voltage for any sampling apertures. These experimental results would be helpful to establish the molecule reaction dynamics model of pulsed corona discharge deSO(2)/deNO(x) and optimize the power supply and reactor. (C) 2004 Elsevier Ltd. All rights reserved.