Detail publikace

Study of Pressure and Temperature Influence on the Nitrogen Plasma under Discharge and Post-Discharge Conditions

SOURAL, I. KRČMA, F. MAZÁNKOVÁ, V.

Originální název

Study of Pressure and Temperature Influence on the Nitrogen Plasma under Discharge and Post-Discharge Conditions

Anglický název

Study of Pressure and Temperature Influence on the Nitrogen Plasma under Discharge and Post-Discharge Conditions

Jazyk

en

Originální abstrakt

In presented work, the decaying plasma in Pyrex tube was studied by the optical emission spectroscopy. DC discharge in flowing regime was used. The emission of three nitrogen spectral systems (1st and 2nd positive and 1st negative) was studied in time evolution for pressures of 500-5000 Pa and two wall temperatures: ambient and liquid nitrogen. Results showed that all three nitrogen systems had their intensity maxima in the afterglow part. These maxima decreased with the increase of pressure for all systems, and moved to the later decay time. Based on the band intensities, the relative vibrational populations of corresponding states were calculated. While populations of N2(B), and N2+(B) states were higher at the ambient wall temperature, the populations of N2(C) state were higher at the decreased wall temperature. Besides the nitrogen bands, some weak bands, mainly originating at NO(A, v = 0) level, were observed. Their intensities increased with the increase of pressure, and they showed the same temperature dependence as the nitrogen 2nd positive system.

Anglický abstrakt

In presented work, the decaying plasma in Pyrex tube was studied by the optical emission spectroscopy. DC discharge in flowing regime was used. The emission of three nitrogen spectral systems (1st and 2nd positive and 1st negative) was studied in time evolution for pressures of 500-5000 Pa and two wall temperatures: ambient and liquid nitrogen. Results showed that all three nitrogen systems had their intensity maxima in the afterglow part. These maxima decreased with the increase of pressure for all systems, and moved to the later decay time. Based on the band intensities, the relative vibrational populations of corresponding states were calculated. While populations of N2(B), and N2+(B) states were higher at the ambient wall temperature, the populations of N2(C) state were higher at the decreased wall temperature. Besides the nitrogen bands, some weak bands, mainly originating at NO(A, v = 0) level, were observed. Their intensities increased with the increase of pressure, and they showed the same temperature dependence as the nitrogen 2nd positive system.

Dokumenty

BibTex


@inproceedings{BUT36689,
  author="Ivo {Soural} and František {Krčma} and Věra {Mazánková}",
  title="Study of Pressure and Temperature Influence on the Nitrogen Plasma under Discharge and Post-Discharge Conditions",
  annote="In presented work, the decaying plasma in Pyrex tube was studied by the optical emission spectroscopy. DC discharge in flowing regime was used. The emission of three nitrogen spectral systems (1st and 2nd positive and 1st negative) was studied in time evolution for pressures of 500-5000 Pa and two wall temperatures: ambient and liquid nitrogen. Results showed that all three nitrogen systems had their intensity maxima in the afterglow part. These maxima decreased with the increase of pressure for all systems, and moved to the later decay time. Based on the band intensities, the relative vibrational populations of corresponding states were calculated. While populations of N2(B), and N2+(B) states were higher at the ambient wall temperature, the populations of N2(C) state were higher at the decreased wall temperature. Besides the nitrogen bands, some weak bands, mainly originating at NO(A, v = 0) level, were observed. Their intensities increased with the increase of pressure, and they showed the same temperature dependence as the nitrogen 2nd positive system.",
  booktitle="Book of Contributed Papers: 18th Symposium on Application of Plasma Processes and Workshop on Plasmas as a Planetary Atmospheres Mimics",
  chapter="36689",
  howpublished="electronic, physical medium",
  year="2011",
  month="january",
  pages="124--128",
  type="conference paper"
}