Estimation of confidence intervals for radial emissivity and optimization of data treatment techniques in Abel inversion

Chan, George C.-Y.; Hieftje, Gary M.

doi:10.1016/j.sab.2005.11.009

Cited by 25 publications

(19 citation statements)

References 33 publications

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“…Abel inversion, usually applied to calculate radially resolved from lateral spatially resolved emission intensities in plasma sources [40][41][42], was considered to introduce additional errors because the investigated discharge exhibited a less cylindrical symmetry as the conventional ICP. Moreover, the discharge was studied radially-viewed for the first time and the influence of the torch geometry on the emission profiles and the occurrence of scattered light were unknown.…”

Section: Data Processing and Correction Methodsmentioning

confidence: 99%

Plasma diagnostic on a low-flow plasma for inductively coupled plasma optical emission spectrometry

Engelhard

Chan

Gamez

et al. 2008

Spectrochimica Acta Part B: Atomic Spectroscopy

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Section: Data Processing and Correction Methodsmentioning

confidence: 99%

Plasma diagnostic on a low-flow plasma for inductively coupled plasma optical emission spectrometry

Engelhard

Chan

Gamez

et al. 2008

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…As the Abel inversion amplifies the noise in the raw data as well as requires the intensity to fall to zero at the plasma edge, it is better to reduce the noise before data processing. It was found that polynomial fitting can be used to partially filter out noise in the raw data [31]. Therefore, before…”

Section: T Exc (A)mentioning

confidence: 99%

Excitation Temperature and Constituent Concentration Profiles of the Plasma Jet Under Plasma Spray-PVD Conditions

Mauer

Vaßen

2017

Plasma Chem Plasma Process

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Plasma spray-physical vapor deposition (PS-PVD) is a promising technology to produce columnar structured thermal barrier coatings with excellent cyclic lifetime. The characteristics of plasma jets generated by standard plasma gases in the PS-PVD process, argon and helium, have been studied by optical emission spectroscopy. Abel inversion was introduced to reconstruct the spatial characteristics. In the central area of the plasma jet, the ionization of argon was found to be one of the reasons for low emission of atomic argon. Another reason could be the demixing so that helium prevails around the central axis of the plasma jet. The excitation temperature of argon was calculated by the Boltzmann plot method. Its values decreased from the center to the edge of the plasma jet. Applying the same method, a spurious high excitation temperature of helium was obtained, which could be caused by the strong deviation from local thermal equilibrium of helium. The addition of hydrogen into plasma gases leads to a lower excitation temperature, however a higher substrate temperature due to the high thermal conductivity induced by the dissociation of hydrogen. A loading effect is exerted by the feedstock powder on the plasma jet, which was found to reduce the average excitation temperature considerably by more than 700 K in the Ar/He jet.

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“…This was performed using a LabVIEW program for determining confidence intervals of Abel-inverted radial emission profiles [8]. This program works with random noise generation.…”

Section: Radial Distribution Of Emisivitymentioning

confidence: 99%

“…MPC plasma flow with standard parameters (1 MJ/m2 in 0.1 ms) was used for simulation of transient peak thermal loads during Type I ELMs and disruptions. Analysis of the targets erosion, brittle destruction, melting processes, and dust formation has been performed [8].…”

Section: Plasma Flow Interaction With Iter Divertor Related Surfacesmentioning

confidence: 99%

Current Status of the Magnetoplasma Compressor Device in Belgrade - Study of Plasma Facing Materials Important for Fusion Reactors

Trklja¹

2015

: Interdiscip. Descr. Complex Syst.

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The magnetoplasma compressor, a quasi stationary plasma accelerator, is a source of supersonic compression plasma flow. High plasma parameters of compression flow, large flow velocity and discharge duration enable their efficient usage for development of new plasma technologies, including material surface modification, creation of sub microstructures and nanostructures. In this paper spatial and temporal distribution of emissivity was studied using inverse Abel transform. This has been realized in LabVIEW environment. The plasma flow generated by quasi stationary plasma accelerators can be used for simulation of high energy plasma interaction with different materials of interest for fusion experiments. Surface phenomena are results of specific conditions during plasma flow interaction with target surface. As the next step in our research, spectral analysis of the plasma area around targets surface, after interaction between target and plasma, generated by magnetoplasma compressor, is planned. The first material which will be subjected to interaction with plasma will be a carbon fiber -material of big importance for divertor region in fusion devices.

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Estimation of confidence intervals for radial emissivity and optimization of data treatment techniques in Abel inversion

Cited by 25 publications

References 33 publications

Plasma diagnostic on a low-flow plasma for inductively coupled plasma optical emission spectrometry

Plasma diagnostic on a low-flow plasma for inductively coupled plasma optical emission spectrometry

Excitation Temperature and Constituent Concentration Profiles of the Plasma Jet Under Plasma Spray-PVD Conditions

Current Status of the Magnetoplasma Compressor Device in Belgrade - Study of Plasma Facing Materials Important for Fusion Reactors

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