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

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

doi:10.1063/1.3496041

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

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

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

56 Scopus citations

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)
Article number	151501
Journal	Applied Physics Letters
Volume	97
Issue number	15
DOIs	https://doi.org/10.1063/1.3496041
State	Published - Oct 11 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.3496041

Cite this

@article{5040737355b84525818e1fd725087896,

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 Nikolas Knake and Daniel Schr{\"o}der and J{\"o}rg Winter and {Schulz-Von Der Gathen}, Volker and Graves, {David B.}",

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 = "2010",

month = oct,

day = "11",

doi = "10.1063/1.3496041",

language = "English (US)",

volume = "97",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "15",

}

TY - JOUR

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

AU - Sakiyama, Yukinori

AU - Knake, Nikolas

AU - Schröder, Daniel

AU - Winter, Jörg

AU - Schulz-Von Der Gathen, Volker

AU - Graves, David B.

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 - 2010/10/11

Y1 - 2010/10/11

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.

UR - http://www.scopus.com/inward/record.url?scp=77958091568&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77958091568&partnerID=8YFLogxK

U2 - 10.1063/1.3496041

DO - 10.1063/1.3496041

M3 - Article

AN - SCOPUS:77958091568

SN - 0003-6951

VL - 97

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 15

M1 - 151501

ER -

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

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this