Laser-induced fluorescence spectroscopy of 
 and absolute density calibration by Rayleigh scattering in capacitively coupled rf discharges

Nemschokmichal, S; Bernhardt, F.; Krames, B.; Meichsner, Jürgen

doi:10.1088/0022-3727/44/20/205201

Cited by 13 publications

(10 citation statements)

References 29 publications

(40 reference statements)

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“…For the absolute density calibration the Rayleigh scattering at carbon dioxide has been measured for equal conditions [25,26]. The laser excites the transition from the A 3 + u , v = 0 state to the B 3 Π g , v = 3 state at the wavelength of λ = 687.44 nm.…”

Section: Introductionmentioning

confidence: 99%

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Development of Barrier Discharges: Operation Modes and Structure Formation

Bogaczyk

Nemschokmichal

Wild

et al. 2012

Contrib. Plasma Phys.

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A discharge cell configuration combining three high-end diagnostic techniques (cross-correlation spectroscopy, electro-optic Pockels effect and laser induced fluorescence spectroscopy) has been developed. The joint application of these diagnostics enables the investigation of surface and bulk processes in barrier discharges in different arrangements. Surface charge density, N2(A) metastable state density, and optical radiation of plasma as three key parameters can be measured and correlated under identical and well-defined experimental conditions. Systematic measurements of absolute surface charge densities and nitrogen metastable concentrations are presented for different operation modes. The operation mode is mainly controlled by the gas composition, the discharge cell geometry, and the properties of the applied voltage. In particular, in pure helium the unusual Townsend-like discharge was investigated in detail. The described arrangements and the knowledge about reproducible control of discharge modes are an excellent base for the systematic investigation of the interaction between plasma and dielectric surface and its role on the formation, development, and structure of barrier discharges.

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Section: Introductionmentioning

confidence: 99%

“…The fluorescence band of the following transition to the A 3 + u , v = 1 state at about 762 nm is measured perpendicularly to the laser beam via a monochromator and a photomultiplier tube. For the absolute density calibration the Rayleigh scattering at carbon dioxide has been measured for equal conditions [25,26].…”

Section: Introductionmentioning

confidence: 99%

Development of Barrier Discharges: Operation Modes and Structure Formation

Bogaczyk

Nemschokmichal

Wild

et al. 2012

Contrib. Plasma Phys.

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show abstract

“…Extending the usual LIF scheme to higher energies of exciting laser pulses, i.e. the region of weak saturation as in [9,10], allows us to increase the S/N ratio while preserving the advantages of a planar LIF setup.…”

Section: Introductionmentioning

confidence: 99%

Spatially resolved measurement of hydroxyl radical (OH) concentration in an argon RF plasma jet by planar laser-induced fluorescence

Voráč

Obrusník

Procházka

et al. 2014

Plasma Sources Sci. Technol.

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A spatially resolved two-dimensional quantitative measurement of OH concentration in an effluent of a radio-frequency-driven atmospheric pressure plasma jet ignited in argon is presented. The measurement is supported by a gas dynamics model which gives detailed information about the spatially resolved gas composition and temperature. The volume in which the OH radicals were found and partially also the total amount of OH radicals increase with the argon flow rate, up to a value for which the flow becomes turbulent. In the turbulent regime, both the emission from the jet and the OH concentration are confined to a smaller volume. The maximum concentration of about 5.4 × 10 21 m −3 is reached at the tip of the visible discharge at the flow rate of 0.6 slm and high driving powers. An increase in hydroxyl concentration due to admixing of humid ambient air to the argon flow was observed.

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“…To obtain high signal intensity, temporal resolution and spectral selectivity, fluorescence is usually excited by lasers. In plasma physics, laser-induced fluorescence (LIF) [1,2] is currently the leading method for the detection of radicals, [1,3,4] metastables [5,6] and some ions. [7,8] LIF provides high sensitivity, a low limit of detection and high…”

Section: Introductionmentioning

confidence: 99%

Solution to the perturbation of LIF measurements via photodissociation, OH measurement in atmospheric‐pressure multihollow DBD

Dvořák

Procházka

Krumpolec

et al. 2020

Plasma Processes & Polymers

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This study solves the problem of the invasivity of laser-induced fluorescence (LIF) measurements caused by photodissociation. It is shown with the example of OH LIF that the excess signal caused by laser-induced photodissociation can be distinguished from the true LIF signal of the naturally presented species by This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Laser-induced fluorescence spectroscopy of and absolute density calibration by Rayleigh scattering in capacitively coupled rf discharges

Cited by 13 publications

References 29 publications

Development of Barrier Discharges: Operation Modes and Structure Formation

Development of Barrier Discharges: Operation Modes and Structure Formation

Spatially resolved measurement of hydroxyl radical (OH) concentration in an argon RF plasma jet by planar laser-induced fluorescence

Solution to the perturbation of LIF measurements via photodissociation, OH measurement in atmospheric‐pressure multihollow DBD

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