𝔖 Bobbio Scriptorium
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Radiative Transitions and Temperature Time Dependences in Pulse Excited Microwave Discharges – (N2, Ar + N2)

✍ Scribed by J. Janča; A. Tálský

Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
845 KB
Volume
16
Category
Article
ISSN
0005-8025

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✦ Synopsis

Quantitative spectral and microwave measurements of vibrstional temperatures and electron densities were performed for 2400 MHz non-isothermic pulse excited discharges in flowing nitrogen and argon a t pressures (60-2700) Pa. A detailed analysis of the N, vibrational states population for the N, Can,, XIZg+ electronic states has been carried out. The basic difficulties encountered when comparing the spectroscopically determined values of vibrational temperatures with corresponding quantities of the ground electronics state are mentioned and the time resolved dependences of the translational gas temperature in N, during the microwave pulse is evaluated. The steady state in the nitrogen pulse excited microwave plasma is reached within 3 -10-' s, but generally, this time depends on the gas pressure in the discharge tube. I n the Ar + Nz mixtures the excitation conditions are complicated by the metastable argon atoms (3P,,,) creating the nonequilibrium populations of electronic, vibrational and rotational N, states.

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