Detail publikace

The Importance of the Discharge Current in the Formation of the Pink Afterglow of a Nitrogen DC Discharge

SOURAL, I. GUERRA, V. LINO DA SILVA, M. SÁ, P. KRČMA, F.

Originální název

The Importance of the Discharge Current in the Formation of the Pink Afterglow of a Nitrogen DC Discharge

Anglický název

The Importance of the Discharge Current in the Formation of the Pink Afterglow of a Nitrogen DC Discharge

Jazyk

en

Originální abstrakt

In this work we have used optical emission spectroscopy to measure the (2-0) 1st positive system emission in nitrogen DC discharge at pressure p=1000 Pa, for discharge currents in the range I=50-200 mA, in a Pyrex tube with internal diameter (2R)=13 mm. It is shown that an important difference in behaviour occurs when the discharge current is increased from 50 to 70 mA. As a matter of fact, at 50 mA the pink-afterglow, characterized by the raise in the optical emission after a dark zone, does not exist, only the well known yellow-afterglow being visible. The former is a result of the vibration-vibration (V-V) up-pumping followed by vibration-to-electronic (V-E) energy exchanges, whereas the latter is a result of 3-body N-atom recombination. However, for 70 mA and higher currents the pink-afterglow exists and gets more noticeable as the current increases.

Anglický abstrakt

In this work we have used optical emission spectroscopy to measure the (2-0) 1st positive system emission in nitrogen DC discharge at pressure p=1000 Pa, for discharge currents in the range I=50-200 mA, in a Pyrex tube with internal diameter (2R)=13 mm. It is shown that an important difference in behaviour occurs when the discharge current is increased from 50 to 70 mA. As a matter of fact, at 50 mA the pink-afterglow, characterized by the raise in the optical emission after a dark zone, does not exist, only the well known yellow-afterglow being visible. The former is a result of the vibration-vibration (V-V) up-pumping followed by vibration-to-electronic (V-E) energy exchanges, whereas the latter is a result of 3-body N-atom recombination. However, for 70 mA and higher currents the pink-afterglow exists and gets more noticeable as the current increases.

Dokumenty

BibTex


@inproceedings{BUT33069,
  author="Ivo {Soural} and Vasco {Guerra} and M. {Lino da Silva} and Paul {Sá} and František {Krčma}",
  title="The Importance of the Discharge Current in the Formation of the Pink Afterglow of a Nitrogen DC Discharge",
  annote="In this work we have used optical emission spectroscopy to measure the (2-0) 1st positive system emission in nitrogen DC discharge at pressure p=1000 Pa, for discharge currents in the range I=50-200 mA, in a Pyrex tube with internal diameter (2R)=13 mm. It is shown that an important difference in behaviour occurs when the discharge current is increased from 50 to 70 mA. As a matter of fact, at 50 mA the pink-afterglow, characterized by the raise in the optical emission after a dark zone, does not exist, only the well known yellow-afterglow being visible. The former is a result of the vibration-vibration (V-V) up-pumping followed by vibration-to-electronic (V-E) energy exchanges, whereas the latter is a result of 3-body N-atom recombination. However, for 70 mA and higher currents the pink-afterglow exists and gets more noticeable as the current increases.",
  address="EPS",
  booktitle="Proceedings of 36th European Physical Society Conference on Plasma Physics",
  chapter="33069",
  howpublished="electronic, physical medium",
  institution="EPS",
  year="2009",
  month="june",
  pages="P2-103-1--P2-103-4",
  publisher="EPS",
  type="conference paper"
}