Measurement of OH radicals distribution in a microwave plasma sheet using LIF method

Mateusz Tański; Marek Kocik; Bartosz Hrycak; Dariusz Czylkowski; Mariusz Jasiński; Toshiyuki Kawasaki; Seiji Kanazawa

doi:10.1016/j.saa.2019.117268

Measurement of OH radicals distribution in a microwave plasma sheet using LIF method

Spectrochim Acta A Mol Biomol Spectrosc. 2019 Nov 5:222:117268. doi: 10.1016/j.saa.2019.117268. Epub 2019 Jun 13.

Authors

Mateusz Tański¹, Marek Kocik¹, Bartosz Hrycak¹, Dariusz Czylkowski², Mariusz Jasiński¹, Toshiyuki Kawasaki³, Seiji Kanazawa⁴

Affiliations

¹ Institute of Fluid Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland.
² Institute of Fluid Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland. Electronic address: dczylkowski@imp.gda.pl.
³ Department of Electrical Engineering, Nishinippon Institute of Technology, 1-11 Aratsu, Kanda, Fukuoka 800-0394, Japan.
⁴ Faculty of Science and Technology, Oita University, 700 Dannoharu, Oita 870-1192, Japan.

PMID: 31226613
DOI: 10.1016/j.saa.2019.117268

Abstract

Microwave plasma sources (MPSs) operating at atmospheric pressure provide plasmas in the form of a flame or cylindrical column. In contrast, this article presents an innovative MPS (patented by us) for generating a new type of plasma, i.e. in the form of a plasma sheet, which is generated in a flat cuboidal quartz box. It is based on a WR 340 waveguide, powered by microwaves of 2.45 GHz and operated in argon at atmospheric pressure. The plasma sheet contains a multitude of filaments typical of microwave argon plasmas. In the presented experiment, the spatial distribution of the OH radicals in the microwave plasma sheet was measured by means of the LIF method. Studies have shown that the relative concentration of OH radicals increases with the increase in microwave power and decreases with the increasing argon flow rate.

Keywords: Atmospheric pressure plasma; LIF method; Microwave plasma; OH radicals; Plasma sheet.