Spectroscopic localization of water leaks in iter

Kurnaev, V. A.; Afonin, Oleg; Antipenkov, A.; Koborov, N.N.; Mukhammedzyanov, T.R.; Очкин, В. Н.; Pearce, R.; Pleshkov, E. I.; Podolyako, F.; Sorokin, I. A.; Urusov, V. A.; Визгалов, И. В.; Voronov, G. S.; Vukolov, K.Yu.; Worh, L.

doi:10.1016/j.fusengdes.2012.12.022

Cited by 22 publications

(16 citation statements)

References 3 publications

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“…A complex of spectroscopic studies was carried out on an L-2M stellarator (the major radius of 1 m, the minor radius of 0.115 m) [161][162][163]. There were also carried out measurements on the OH luminescence according to the method of [160], which confirmed the sensitivity of 10 -5 Pa m 3 s -1 [162,163].…”

Section: Preceding Ongoing and Required Studiesmentioning

confidence: 89%

Spectral Methods of Control of Impurities, Their Flows and Localization in an Equilibrium Low-Temperature Plasma of Low Pressure

2020

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The state-of-art of studies of processes involving small fractions of particles formed as a result of chemical transformations of the source gas or appearing from the outside as an impurity is discussed. Various high-sensitivity methods for measuring the low concentrations of particles are considered. The main focus is on spectral methods, both classical and laser ones. The main modern fields of the application of non-equilibrium plasma, features, and achievements of the diagnostic tools used in them are highlighted. The emphasis is on spectroscopic studies of plasma purity in the low-temperature near-wall layers of thermonuclear reactors. In this case, the issue of the penetration of water molecules into the plasma chamber from the cooling circuits is of particular importance. In view of the limited accessibility to the reactors, new remote versions of spectral emission methods are being developed that are focused on the diagnostics of the ITER near-wall plasma. A new method of multispectral optical actinometry is discussed, in which intermediate chemically unstable particles can play the role of actinometers. This broadens the range of possibilities for quantitative measurements of concentrations of particles of different kinds, and increases the sensitivity. Effective actinometric pairs were found for the objects under consideration, e.g., hydrogen and deuterium atoms. The schemes are worked out on laboratory facilities, and kinetic models of plasma-chemical processes are developed. Scaling of the results of model experiments makes it possible to predict the measurement of the impurity flows at the level (10–9–10–13) Pa m3 s–1 with the localization of sources determined by the spatial resolution of the optical system.

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Section: Preceding Ongoing and Required Studiesmentioning

confidence: 89%

Spectral Methods of Control of Impurities, Their Flows and Localization in an Equilibrium Low-Temperature Plasma of Low Pressure

2020

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“…The residual gas composition is controlled by Extor XT100M quadrupole mass-spectrometer. Thermochemical water vapor source [5] based on Ca(OH) 2 thermal decomposition is used for experiments with water adsorption on the cathode.…”

Section: Methodsmentioning

confidence: 99%

Emission properties of the plasma faced materials covered with thin films

Sinelnikov

Kurnaev

Мамедов

2014

2014 International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)

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Electric field between the plasma and the plasma faced components can be high enough for appearance of prebreakdown currents measured in the experiments on vacuum insulation. In turn, thin insulating films on plasma faced surfaces can significantly change its emission properties and generate surface-plasma instabilities. In this paper, the results of current-voltage characteristic measurement accompanied with in situ diagnostics of the surfaces covered by non-metal films and water adsorption layers by using low angle ion spectroscopy are presented.

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“…45084.16813 Присутствие молекул H 2 O в плазме может влиять на параметры электроразрядных установок. Их детектирование представляет практи-ческий интерес, к этой проблеме привлечены в том числе спектро-скопические методы [1,2]. Требования к чувствительности особенно повысились в связи с созданием новых термоядерных реакторов, в частности международного экспериментального термоядерного реакто-ра (ИТЭР) [3], и это потребовало разработки специальных приемов.…”

Section: поступило в редакцию 4 апреля 2017 гunclassified

Определение Малых Концентраций Молекул Воды В Плазме Методами Актинометрии И Моделирования

Бернацкий¹,

Очкин²,

Кочетов³

2017

Письма В Журнал Технической Физики

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Исследуются корреляции концентраций молекул H2O и атомов водорода в плазме влажных инертных газов. Результаты измерений концентрации паров воды сравниваются с результатами моделирования плазмохимических процессов. Обсуждается масштабирование результатов. DOI: 10.21883/PJTF.2017.19.45084.16813

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Spectroscopic localization of water leaks in iter

Cited by 22 publications

References 3 publications

Spectral Methods of Control of Impurities, Their Flows and Localization in an Equilibrium Low-Temperature Plasma of Low Pressure

Spectral Methods of Control of Impurities, Their Flows and Localization in an Equilibrium Low-Temperature Plasma of Low Pressure

Emission properties of the plasma faced materials covered with thin films

Определение Малых Концентраций Молекул Воды В Плазме Методами Актинометрии И Моделирования

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