Publication detail

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.

Original Title

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

English Title

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

Type

conference paper

Language

en

Original Abstract

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.

English abstract

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.

Keywords

nitrogen pink afterglow, numeric simulation, optical emission spectroscopy

RIV year

2009

Released

29.06.2009

Publisher

EPS

Location

Sofia

ISBN

2-914771-61-4

Book

Proceedings of 36th European Physical Society Conference on Plasma Physics

Pages from

P2-103-1

Pages to

P2-103-4

Pages count

4

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"
}