Gas Temperature Distribution in Cathode Fall Region of Grimm Glow Discharge

Authors

  • G. Majstorovic Military Academy, University of Defence, Pavla Jurišica Šturma 33, 11105 Belgrade
  • M. Vasiljevic Faculty of Physics, University of Belgrade, P.O. Box 44, 11001 Belgrade
  • N. Šišovic Faculty of Physics, University of Belgrade, P.O. Box 44, 11001 Belgrade

DOI:

https://doi.org/10.14311/ppt.2018.3.122

Keywords:

spectroscopy, hydrogen molecule, rotational temperature measurement

Abstract

Optical emission spectroscopy technique was used to measure gas temperature along the axis of cylindrical abnormal glow discharge parallel to the copper cathode surface (side-on) in hydrogen-argon mixture at low pressure. The rotational temperature of excited state of H2 was determined from the rotational structure of Q branch of Fulcher-α diagonal bands using Boltzmann plot technique while the obtained ground vibrational state temperature is assumed to be equal to gas temperature. The temperature T0 determined from the rotational population density distribution in an excited vibrational state can be considered as a valid estimation of the ground state temperatutre i.e. H2 gas temperature.

References

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Published

2019-01-08

Issue

Vol. 5 No. 3 (2018)

Section

Articles

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