Evolution of metastable state molecules N2(A3Σu+) in a nanosecond pulsed discharge: a PIC/MCC simulation

Gao Liang; Ding Hongbin

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Evolution of metastable state molecules N2(A3Σu+) in a nanosecond pulsed discharge: a PIC/MCC simulation

Gao Liang 1,Ding Hongbin 2 * #

1.School of Physics and Optoelectric Engineering, Dalian University of Technology,LiaoNing DaLian 116024

2.School of Physics and Optoelectric Engineering, Dalian University of Technology,116024

*Correspondence author

#Submitted by

Subject:

Funding: National Natural Science Foundation of China（No.10875023 and 10875022）

Opened online:13 February 2012

Accepted by: none

Citation: Gao Liang,Ding Hongbin.Evolution of metastable state molecules N2(A3Σu+) in a nanosecond pulsed discharge: a PIC/MCC simulation[OL]. [13 February 2012] http://en.paper.edu.cn/en_releasepaper/content/4461129

A Particle-In-Cell (PIC) plus Monte Carlo Collisions (MCC) method has been employed to investigate the nitrogen discharge driven by a nanosecond pulse power source. To assess whether the production of the metastable state N2(A3Σu+) can be efficiently enhanced in a nanosecond pulsed discharge, the evolutions of metastable state N2(A3Σu+) density and electron energy distribution function (EEDF) have been examined in detail. The simulation results indicate that the ultra short pulse can modulate the electron energy effectively: during the early pulse-on time, high energy electrons give rise to quick electron avalanche and rapid growth of the metastable state N2(A3Σu+) density. It is estimated that for a single pulse with amplitude of -9 kV and pulse width 30 ns, the metastable state N2(A3Σu+) density can achieve a value in the order of 109 cm-3. The N2(A3Σu+) density at such a value could be easily detected by laser-based experimental methods.

Keywords:Nitrogen discharge; metastable state; particle-in-cell simulation; electron energy distribution function

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