Gas flow dependence of ground state atomic oxygen in plasma needle discharge at atmospheric pressure

Yukinori Sakiyama; David B. Graves; Nikolas Knake; Daniel SchröDer; Jörg Winter; Volker Schulz Von Der Gathen

doi:10.1109/18.256504

Gas flow dependence of ground state atomic oxygen in plasma needle discharge at atmospheric pressure

Yukinori Sakiyama, David B. Graves, Nikolas Knake, Daniel SchröDer, Jörg Winter, Volker Schulz Von Der Gathen

Research output: Contribution to journal › Article › peer-review

Abstract

We present clear evidence that ground state atomic oxygen shows two patterns near a surface in the helium plasma needle discharge. Two-photon absorption laser-induced fluorescence spectroscopy, combined with gas flow simulation, was employed to obtain spatially-resolved ground state atomic oxygen densities. When the feed gas flow rate is low, the radial density peaks along the axis of the needle. At high flow rate, a ring-shaped density distribution appears. The peak density is on the order of 10²¹ m^-3 in both cases. The results are consistent with a previous report of the flow-dependent bacterial killing pattern observed under similar conditions.

Original language	English (US)
Pages (from-to)	979-988
Number of pages	10
Journal	IEEE Transactions on Information Theory
Volume	39
Issue number	3
DOIs	https://doi.org/10.1109/18.256504
State	Published - 1993
Externally published	Yes

All Science Journal Classification (ASJC) codes

Information Systems
Computer Science Applications
Library and Information Sciences

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10.1109/18.256504

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@article{388403eae0e84449ab09cbec182c96b2,

title = "Gas flow dependence of ground state atomic oxygen in plasma needle discharge at atmospheric pressure",

abstract = "We present clear evidence that ground state atomic oxygen shows two patterns near a surface in the helium plasma needle discharge. Two-photon absorption laser-induced fluorescence spectroscopy, combined with gas flow simulation, was employed to obtain spatially-resolved ground state atomic oxygen densities. When the feed gas flow rate is low, the radial density peaks along the axis of the needle. At high flow rate, a ring-shaped density distribution appears. The peak density is on the order of 1021 m-3 in both cases. The results are consistent with a previous report of the flow-dependent bacterial killing pattern observed under similar conditions.",

author = "Yukinori Sakiyama and Graves, {David B.} and Nikolas Knake and Daniel Schr{\"o}Der and J{\"o}rg Winter and {Der Gathen}, {Volker Schulz Von}",

note = "Funding Information: The visit of Y.S. was supported by a travel grant of the Research Department {\textquoteleft}Plasmas with Complex Interactions{\textquoteright} of the Ruhr-Universit{\"a}t Bochum. This work was also supported by the German Research Foundation in the frame of project A1 of the Research Unit FOR 1123 (Grant No. SCHU 2353/2)-Physics of Microplasmas and the Research School of the Ruhr-Universit{\"a}t Bochum.",

year = "1993",

doi = "10.1109/18.256504",

language = "English (US)",

volume = "39",

pages = "979--988",

journal = "IEEE Transactions on Information Theory",

issn = "0018-9448",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "3",

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TY - JOUR

T1 - Gas flow dependence of ground state atomic oxygen in plasma needle discharge at atmospheric pressure

AU - Sakiyama, Yukinori

AU - Graves, David B.

AU - Knake, Nikolas

AU - SchröDer, Daniel

AU - Winter, Jörg

AU - Der Gathen, Volker Schulz Von

N1 - Funding Information: The visit of Y.S. was supported by a travel grant of the Research Department ‘Plasmas with Complex Interactions’ of the Ruhr-Universität Bochum. This work was also supported by the German Research Foundation in the frame of project A1 of the Research Unit FOR 1123 (Grant No. SCHU 2353/2)-Physics of Microplasmas and the Research School of the Ruhr-Universität Bochum.

PY - 1993

Y1 - 1993

N2 - We present clear evidence that ground state atomic oxygen shows two patterns near a surface in the helium plasma needle discharge. Two-photon absorption laser-induced fluorescence spectroscopy, combined with gas flow simulation, was employed to obtain spatially-resolved ground state atomic oxygen densities. When the feed gas flow rate is low, the radial density peaks along the axis of the needle. At high flow rate, a ring-shaped density distribution appears. The peak density is on the order of 1021 m-3 in both cases. The results are consistent with a previous report of the flow-dependent bacterial killing pattern observed under similar conditions.

AB - We present clear evidence that ground state atomic oxygen shows two patterns near a surface in the helium plasma needle discharge. Two-photon absorption laser-induced fluorescence spectroscopy, combined with gas flow simulation, was employed to obtain spatially-resolved ground state atomic oxygen densities. When the feed gas flow rate is low, the radial density peaks along the axis of the needle. At high flow rate, a ring-shaped density distribution appears. The peak density is on the order of 1021 m-3 in both cases. The results are consistent with a previous report of the flow-dependent bacterial killing pattern observed under similar conditions.

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DO - 10.1109/18.256504

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JO - IEEE Transactions on Information Theory

JF - IEEE Transactions on Information Theory

IS - 3

ER -

Gas flow dependence of ground state atomic oxygen in plasma needle discharge at atmospheric pressure

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