Detail publikace

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

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.

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"
}