Decay of the electron density and the electron collision frequency between successive discharges of a pulsed plasma jet in N2

Marc van der Schans (Corresponding author), Bart Platier (Corresponding author), Peter Koelman, F.M.J.H. van de Wetering, Jan van Dijk, Job Beckers, Sander Nijdam, Wilbert IJzerman

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Abstract

The decay of the electron density and electron collision frequency between successive discharges in a pulsed plasma jet in N2 feed gas has been investigated using microwave cavity resonance spectroscopy. The method and analysis were adapted to be able to apply this diagnostic to a pulsed plasma jet at atmospheric pressure. The results are compared to a global model. It is shown that the electron density and effective collision frequency can be measured using this technique from about 1 μs up to approximately 60 μs after the discharge, where the former time scale is limited by the response time of the cavity and the latter by the detection limit of the setup. Although the data analysis requires an estimation of the plasma volume, which limits the absolute accuracy of the electron density to its order of magnitude, the measured electron densities are in the same range as those predicted by the global model. Additionally, there is a good qualitative agreement in the electron density decay rate between the measurements and the model. Furthermore, it is inferred from the model that the minimum seed electron density required for repeatable guided streamer discharges in a pulsed plasma jet in N2 feed gas is of the order of 1015 m-3.
Original languageEnglish
Article number035020
Number of pages13
JournalPlasma Sources Science and Technology
Volume28
Issue number3
DOIs
Publication statusPublished - 27 Mar 2019

Fingerprint

plasma jets
electron scattering
decay
cavities
collisions
gases
decay rates
seeds
atmospheric pressure
microwaves
spectroscopy

Keywords

  • Atmospheric pressure plasma jet
  • Collision frequency
  • Electron density
  • Guided streamer
  • Microwave cavity resonance spectroscopy
  • Plasma bullet

Cite this

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title = "Decay of the electron density and the electron collision frequency between successive discharges of a pulsed plasma jet in N2",
abstract = "The decay of the electron density and electron collision frequency between successive discharges in a pulsed plasma jet in N2 feed gas has been investigated using microwave cavity resonance spectroscopy. The method and analysis were adapted to be able to apply this diagnostic to a pulsed plasma jet at atmospheric pressure. The results are compared to a global model. It is shown that the electron density and effective collision frequency can be measured using this technique from about 1 μs up to approximately 60 μs after the discharge, where the former time scale is limited by the response time of the cavity and the latter by the detection limit of the setup. Although the data analysis requires an estimation of the plasma volume, which limits the absolute accuracy of the electron density to its order of magnitude, the measured electron densities are in the same range as those predicted by the global model. Additionally, there is a good qualitative agreement in the electron density decay rate between the measurements and the model. Furthermore, it is inferred from the model that the minimum seed electron density required for repeatable guided streamer discharges in a pulsed plasma jet in N2 feed gas is of the order of 1015 m-3.",
keywords = "Atmospheric pressure plasma jet, Collision frequency, Electron density, Guided streamer, Microwave cavity resonance spectroscopy, Plasma bullet",
author = "{van der Schans}, Marc and Bart Platier and Peter Koelman and {van de Wetering}, F.M.J.H. and {van Dijk}, Jan and Job Beckers and Sander Nijdam and Wilbert IJzerman",
year = "2019",
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T1 - Decay of the electron density and the electron collision frequency between successive discharges of a pulsed plasma jet in N2

AU - van der Schans, Marc

AU - Platier, Bart

AU - Koelman, Peter

AU - van de Wetering, F.M.J.H.

AU - van Dijk, Jan

AU - Beckers, Job

AU - Nijdam, Sander

AU - IJzerman, Wilbert

PY - 2019/3/27

Y1 - 2019/3/27

N2 - The decay of the electron density and electron collision frequency between successive discharges in a pulsed plasma jet in N2 feed gas has been investigated using microwave cavity resonance spectroscopy. The method and analysis were adapted to be able to apply this diagnostic to a pulsed plasma jet at atmospheric pressure. The results are compared to a global model. It is shown that the electron density and effective collision frequency can be measured using this technique from about 1 μs up to approximately 60 μs after the discharge, where the former time scale is limited by the response time of the cavity and the latter by the detection limit of the setup. Although the data analysis requires an estimation of the plasma volume, which limits the absolute accuracy of the electron density to its order of magnitude, the measured electron densities are in the same range as those predicted by the global model. Additionally, there is a good qualitative agreement in the electron density decay rate between the measurements and the model. Furthermore, it is inferred from the model that the minimum seed electron density required for repeatable guided streamer discharges in a pulsed plasma jet in N2 feed gas is of the order of 1015 m-3.

AB - The decay of the electron density and electron collision frequency between successive discharges in a pulsed plasma jet in N2 feed gas has been investigated using microwave cavity resonance spectroscopy. The method and analysis were adapted to be able to apply this diagnostic to a pulsed plasma jet at atmospheric pressure. The results are compared to a global model. It is shown that the electron density and effective collision frequency can be measured using this technique from about 1 μs up to approximately 60 μs after the discharge, where the former time scale is limited by the response time of the cavity and the latter by the detection limit of the setup. Although the data analysis requires an estimation of the plasma volume, which limits the absolute accuracy of the electron density to its order of magnitude, the measured electron densities are in the same range as those predicted by the global model. Additionally, there is a good qualitative agreement in the electron density decay rate between the measurements and the model. Furthermore, it is inferred from the model that the minimum seed electron density required for repeatable guided streamer discharges in a pulsed plasma jet in N2 feed gas is of the order of 1015 m-3.

KW - Atmospheric pressure plasma jet

KW - Collision frequency

KW - Electron density

KW - Guided streamer

KW - Microwave cavity resonance spectroscopy

KW - Plasma bullet

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