Emission properties of apokamp discharge at atmospheric pressure in air, argon, and helium

Emission spectra of the plasma jet of apokamp discharge in air, helium, and argon are studied. Apokamp at atmospheric pressure is formed in the areas of strengthening of the electric field near the bends in the channel of the pulse-periodic discharge and is directed perpendicularly to the discharge...

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Bibliographic Details
Published in:Optics and spectroscopy 2017-02, Vol.122 (2), p.168-174
Main Authors: Panarin, A. A., Skakun, V. S., Sosnin, E. A., Tarasenko, V. F.
Format: Article
Language:English
Subjects:
Argon
Atmospheric pressure
Bends
Emission spectra
Helium
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Plasma jets
Spectroscopy of Atoms and Molecules
X-rays
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Summary:Emission spectra of the plasma jet of apokamp discharge in air, helium, and argon are studied. Apokamp at atmospheric pressure is formed in the areas of strengthening of the electric field near the bends in the channel of the pulse-periodic discharge and is directed perpendicularly to the discharge channel. Apokamp consists of a bright narrow “appendage” connected with the discharge channel and with the diffuse jet emerging from the channel. It is shown that, in helium, the emission of the diffuse part of apokamp is dominated by N 2 and N 2 + , while emission of the “appendage” display lines and bands of He, N 2 , N 2 + , O, and OH. In argon, emission spectra of the diffuse part of the plasma jets contain not only N 2 and N 2 + , but also Ar lines. It is assumed that the surrounding air plays an important role in the formation of the diffuse part of apokamp in helium and argon.
ISSN:0030-400X
1562-6911
DOI:10.1134/S0030400X17020217