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

Cite this

@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",

}

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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U2 - 10.1109/18.256504

DO - 10.1109/18.256504

M3 - Article

AN - SCOPUS:84948603155

SN - 0018-9448

VL - 39

SP - 979

EP - 988

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

Abstract

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