INP

Leibniz Institute for Plasma Science and Technology
Felix-Hausdorff-Str. 2
17489 Greifswald
GERMANY

https://www.inp-greifswald.de/en/
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The Leibniz Institute for Plasma Science and Technology (INP) is the largest non-university institute in the field of low temperature plasmas, their basics and technical applications in Europe. The institute carries out research and development from idea to prototype. The topics focus on the needs of the market. At present, plasmas for materials and energy as well as for environment and health are the focus of interest.

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Creative Commons Attribution 4.0 International (CC BY 4.0)
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Ar metastable densities (³P₂) in the effluent of a filamentary atmospheric pressure plasma jet with humidified feed gas - dataset

Plasma Chemical Processes

The Ar(³P₂) metastable density in the effluent of the cold atmospheric pressure plasma jet kINPen-sci was investigated as a function of the feed gas humidity, the gas curtain composition, and the distance from the nozzle by means of laser atomic absorption spectroscopy. The data set comprises the axial distributions of the Ar metastables as a function of these parameters.

FieldValue
Group
INP
Authors
Klose, Sarah-Johanna
Bansemer, Robert
Brandenburg, Ronny
van Helden, Jean-Pierre
Release Date
2021-01-27
Identifier
a2cababb-9e9f-4767-9234-6de87886adc3
Permanent Identifier (DOI)
10.34711/inptdat.335
Permanent Identifier (URI)
https://www.inptdat.de/node/335
Is supplementing
10.1063/5.0037695
Plasma Source Name
kINPen-sci
Plasma Source Application
material processing
biomedical applications
Plasma Source Specification
atmospheric pressure
AC
high frequency
non-thermal
Plasma Source Properties

Frequency: 860 MHz; Power: 1-3 W
Plasma Medium Name
Ar
Plasma Medium Properties

Feed gas: 3 slm Ar with humidity contents up to 1370 ppm; Gas curtain: 5 slm N₂/O₂ mixture
Plasma Medium Procedure

Part of the feed gas was guided through a water bubbler to humidify the feed gas. The humidity was determined by a chilled mirror hygrometer (EdgeTech, DewMaster).
Plasma Diagnostics Name
laser atomic absorption spectroscopy
Plasma Diagnostics Properties

Laser wavelength: 811.534 nm; Laser linewidth: ~15 fm (0.0002 cm⁻¹);
The laser system comprised a laser diode, an external cavity-like setup made of two acousto-optic modulators, a grating in Littrow configuration, as well as a Michelson–Morley interferometer for the coarse determination of the laser wavelength, enabling a tuning range of about 50 GHz at a frequency of 4.5 GHz.
Plasma Diagnostics Procedure

An acousto-optic modulated (AOM) laser system (EasyLAAS, neoplas control GmbH, Germany) was used to probe the optical Ar(1s₅-2p₉) transition. The beam was guided through an optical fiber to a beam splitter cube. 50% of the laser intensity was reflected into a second fiber, which was connected to a wavemeter (High Finesse, WSG-200) in order to determine the exact laser wavelength. The other 50% (approximately 50 μW) were focused by a lens (focal length 75 mm) to a spot of approximately 100 μm in the effluent of the plasma jet. The plasma jet’s position in axial and radial direction was adjusted by three step motors. In order to avoid the detection of plasma emission next to the transmitted laser light, the laser beam was filtered by a 10 nm bandpass filter at 810 nm. With a second lens, the beam was focused onto a photo detector (Femto, current amplifier HCA-S, 200 MHz band width), which was connected to an oscilloscope (Tektronix, DPO 4104) and read out by acustomized python code on a standard computer.
Language
English
License
Creative Commons Attribution 4.0 International (CC BY 4.0)
Public Access Level
Public
Contact Name
Klose, Sarah-Johanna
Contact Email
sarah-johanna.klose@inp-greifswald.de
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The spatial distribution of HO₂ in an atmospheric pressure plasma jet investigated by cavity ring-down spectroscopy

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