Comparative studies of ionised and excited hydrogen atoms and molecules distributions for plasma–target interaction in a linear simulator machine

Kurnaev, V.А.; Абрамов, В. А.; Kadetov, V. A.; Mozgrin, D. V.; Sarytchev, D.V.; Savjolov, A. S.; Визгалов, И. В.; Kolesnikov, V. N.; Presnyakov, L. P.

doi:10.1016/s0022-3115(98)00669-2

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…However, the absolute values are smaller than the published values. This may be explained by existence of H + 2 or H + 3 [16] in addition to the error of and the Langmuir probe measurement.…”

Section: Heat Load To the Targetsmentioning

confidence: 99%

Effects of hydrogen molecular desorption on the heat load on plasma facing materials

Kobayashi¹,

Xiao²,

Tanaka³

2000

Plasma Phys. Control. Fusion

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Measurements of the heat load on C (isotropic graphite) and W targets were performed in linear steady plasma facility MAP-II (materials and plasma), which produces a low-energy hydrogen plasma 10-20 eV with an electron density of (1.0-5.0) × 10 17 m −3 . From the measurements of the heat removed by the target coolant, heat flow to the target and Balmer intensities near the targets we found that the heat load was larger on the C target than W because of higher molecular hydrogen desorption. The population densities of vibrational levels in the d 3 u state of molecular hydrogen shifted to higher levels near the C target in the spectroscopy of the Fulcher band. From these results, it was found that molecular hydrogen desorption plays an important role in the heat load on plasma facing materials and it depends on the materials, which have different characteristics of hydrogen molecular desorption and energy states of desorbed hydrogen.

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Section: Heat Load To the Targetsmentioning

confidence: 99%

Effects of hydrogen molecular desorption on the heat load on plasma facing materials

Kobayashi¹,

Xiao²,

Tanaka³

2000

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

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The PLM Plasma Device for Tests of Tungsten with Powerful Stationary Heat Plasma Loads

et al. 2019

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A Review of Recombination Coefficients of Neutral Oxygen Atoms for Various Materials

et al. 2023

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Relevant data on heterogeneous surface recombination of neutral oxygen atoms available in the scientific literature are reviewed and discussed for various materials. The coefficients are determined by placing the samples either in non-equilibrium oxygen plasma or its afterglow. The experimental methods used to determine the coefficients are examined and categorized into calorimetry, actinometry, NO titration, laser-induced fluorescence, and various other methods and their combinations. Some numerical models for recombination coefficient determination are also examined. Correlations are drawn between the experimental parameters and the reported coefficients. Different materials are examined and categorized according to reported recombination coefficients into catalytic, semi-catalytic, and inert materials. Measurements from the literature of the recombination coefficients for some materials are compiled and compared, along with the possible system pressure and material surface temperature dependence of the materials’ recombination coefficient. A large scattering of results reported by different authors is discussed, and possible explanations are provided.

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Comparative studies of ionised and excited hydrogen atoms and molecules distributions for plasma–target interaction in a linear simulator machine

Cited by 3 publications

References 5 publications

Effects of hydrogen molecular desorption on the heat load on plasma facing materials

Effects of hydrogen molecular desorption on the heat load on plasma facing materials

The PLM Plasma Device for Tests of Tungsten with Powerful Stationary Heat Plasma Loads

A Review of Recombination Coefficients of Neutral Oxygen Atoms for Various Materials

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