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2D imaging of atomic oxygen reaction dynamics after a nanosecond pulse discharge using Light-field Amplitude Control

Ravelid, Jonas LU ; Sun, Jinguo LU orcid ; Kornienko, Vassily LU ; Konnov, Alexander LU ; Kristensson, Elias LU ; Bao, Yupan LU and Ehn, Andreas LU (2025) In Plasma Sources Science and Technology 34(10).
Abstract
Plasma-assisted technologies are rapidly advancing and are set to play a crucial role in the green transition. One challenge in this development, specifically tied to laser-based plasma diagnostics, is the presence of interfering plasma-induced emissions, such as the de-excitation of naturally excited species, which can complicate the detection of laser-induced signals. Successfully differentiating between the two would unlock new measurement possibilities within plasma and its applications. This paper presents an adaptation of light-field amplitude control (LAC), a novel approach to two-photon atomic laser-induced fluorescence (LIF), which effectively separates LIF from plasma emissions. We demonstrate this capability by distinguishing... (More)
Plasma-assisted technologies are rapidly advancing and are set to play a crucial role in the green transition. One challenge in this development, specifically tied to laser-based plasma diagnostics, is the presence of interfering plasma-induced emissions, such as the de-excitation of naturally excited species, which can complicate the detection of laser-induced signals. Successfully differentiating between the two would unlock new measurement possibilities within plasma and its applications. This paper presents an adaptation of light-field amplitude control (LAC), a novel approach to two-photon atomic laser-induced fluorescence (LIF), which effectively separates LIF from plasma emissions. We demonstrate this capability by distinguishing between plasma emission and LIF in the afterglow of a nanosecond pulsed discharge in atmospheric pressure oxygen gas. Utilising LAC, we present single-shot 2D maps of ground state atomic oxygen distributions at different delays after discharge. Additionally, we report on the temporal dynamics of ground-state atomic oxygen concentration following the discharge, quickly growing until peaking at 2.8 µs, information that was previously unavailable due to interfering plasma emissions. We have also analysed the consumption of atomic oxygen, presenting a 2D map of consumption dynamics and chemical lifetime. Directly, these results will lead to a better understanding of plasma chemistry in oxygen gas, especially the rapid growth phase, but the adaptation of LAC to general plasma diagnostics will enable the extraction of a whole host of new information through the removal of plasma emission. (Less)
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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Plasma Sources Science and Technology
volume
34
issue
10
article number
105010
pages
14 pages
publisher
IOP Publishing
external identifiers
  • scopus:105018575848
ISSN
0963-0252
DOI
10.1088/1361-6595/ae0760
language
English
LU publication?
yes
id
b24ffac0-8d55-4d01-bfd3-62cba5e84bd5
date added to LUP
2025-11-24 15:04:34
date last changed
2025-11-25 08:42:28
@article{b24ffac0-8d55-4d01-bfd3-62cba5e84bd5,
  abstract     = {{Plasma-assisted technologies are rapidly advancing and are set to play a crucial role in the green transition. One challenge in this development, specifically tied to laser-based plasma diagnostics, is the presence of interfering plasma-induced emissions, such as the de-excitation of naturally excited species, which can complicate the detection of laser-induced signals. Successfully differentiating between the two would unlock new measurement possibilities within plasma and its applications. This paper presents an adaptation of light-field amplitude control (LAC), a novel approach to two-photon atomic laser-induced fluorescence (LIF), which effectively separates LIF from plasma emissions. We demonstrate this capability by distinguishing between plasma emission and LIF in the afterglow of a nanosecond pulsed discharge in atmospheric pressure oxygen gas. Utilising LAC, we present single-shot 2D maps of ground state atomic oxygen distributions at different delays after discharge. Additionally, we report on the temporal dynamics of ground-state atomic oxygen concentration following the discharge, quickly growing until peaking at 2.8 µs, information that was previously unavailable due to interfering plasma emissions. We have also analysed the consumption of atomic oxygen, presenting a 2D map of consumption dynamics and chemical lifetime. Directly, these results will lead to a better understanding of plasma chemistry in oxygen gas, especially the rapid growth phase, but the adaptation of LAC to general plasma diagnostics will enable the extraction of a whole host of new information through the removal of plasma emission.}},
  author       = {{Ravelid, Jonas and Sun, Jinguo and Kornienko, Vassily and Konnov, Alexander and Kristensson, Elias and Bao, Yupan and Ehn, Andreas}},
  issn         = {{0963-0252}},
  language     = {{eng}},
  month        = {{10}},
  number       = {{10}},
  publisher    = {{IOP Publishing}},
  series       = {{Plasma Sources Science and Technology}},
  title        = {{2D imaging of atomic oxygen reaction dynamics after a nanosecond pulse discharge using Light-field Amplitude Control}},
  url          = {{http://dx.doi.org/10.1088/1361-6595/ae0760}},
  doi          = {{10.1088/1361-6595/ae0760}},
  volume       = {{34}},
  year         = {{2025}},
}