Publication detail

Influence of oxygen traces on kinetics of pure nitrogen post-discharge

MAZÁNKOVÁ, V. KRČMA, F. SOURAL, I.

Original Title

Type

lecture

Language

English

Original Abstract

The work presents results obtained during spectroscopic observation of DC flowing post-discharges of pure nitrogen plasma and nitrogen plasma containing low oxygen traces up to 0,2 %. The decaying plasma up to 50ms was studied by the emission spectroscopy in the range of 300 - 850 nm. The discharge tube around the observation point (+- 3 cm) could be immersed in liquid nitrogen. Three nitrogen spectral systems and NO-beta bands were identified in the investigated spectral region. The total gas pressure was 1000 Pa and the discharge current was kept at 200 mA. The relative populations of N_2 (B ^3 Pi_g), N_2 (C ^3 Pi_u) and N_2^+ (B ^2 Sigma_u^+) states were calculated in the dependence on post-discharge time. The NO-beta emission was observed, too. Besides the kinetic processes known in pure nitrogen, the quenching of highly excited nitrogen molecules by atomic oxygen as well as their dissociation and energy transfer between nitrogen and NO species played the main role in the post-discharge kinetics.

Keywords

nitrogen post-discharge, pink afterglow, post-discharge kinetics, optical spectroscopy, nitrogen-oxygen mixture

Authors

MAZÁNKOVÁ, V.; KRČMA, F.; SOURAL, I.

Released

15. 11. 2007

Location

Brno

BibTex

@misc{BUT64757,
  author="Věra {Mazánková} and František {Krčma} and Ivo {Soural}",
  title="Influence of oxygen traces on kinetics of pure nitrogen post-discharge",
  year="2007",
  address="Brno",
  note="lecture"
}