What is it about?
The application of diode laser absorption spectroscopy to characterize a nanosecond repetitively pulsed discharge in pure argon gas. A parameteric study looking at the effect of pulse energy, repetition frequency, pressure and spatial variation is discussed in the paper.
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Why is it important?
Contrary to what is expected in a NRPD, we found that the translational temperature of argon atoms in the 1s3 state is characterised by a translational temperature that exceeds the equilibrium temperature by an order of magnitude for an input pulse energy that is of the order 10-100 uJ. Previous studies on NRPDs in argon have shown that the temperature of atoms in the 1s3 state do not exceed room temperature (300 K)
Perspectives
This paper along with the our previous work titled 'Time-resolved temperature and number density measurements in a repetitively pulsed nanosecond-duration discharge' published in Physics of Plasmas (DOI: http://dx.doi.org/10.1063/1.4972876) , as far as we know, shows for the first time the presence of hot argon atoms in a NRPD. This represents one of the few pieces of work in the literature in which experimental evidence of hot atoms in NRPDs has been shown. Numerical studies of plasma assissted combustion using NRPDs have shown that hot atoms play an important role in low temperature combustion, which is important and advantageous in applications such as IC engines and Scramjets.
Mr Rounak Manoharan
University of New South Wales
Read the Original
This page is a summary of: A parametric investigation of repetitively pulsed nanosecond duration discharges in argon, January 2017, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/6.2017-1810.
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