Investigation of the Concentration Dynamics of H2O and HDO Molecules in a Discharge

Bernatskiy, A. V.; Lagunov, V. V.; Очкин, В. Н.

doi:10.1134/s1063778819100065

Cited by 1 publication

(3 citation statements)

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“…The second facility with a glow discharge in the tube (Figs. 12, 13) is used to simulate conditions in the positive column and to compare different measurement methods [58,82,83,[168][169][170][171][172].…”

Section: Model Facilitiesmentioning

confidence: 99%

“…When deuterium molecules are added to the initial gas, the lines of HDO molecules appear in the absorption spectrum (Fig. 20) [168][169][170][171][172].…”

Section: Measurements Of Concentrations Of Water Isotopomers In the Discharge Tubementioning

confidence: 99%

“…Figure 21 shows the results of measurements of the HDO concentrations as a function of the discharge burning time at the current of 4 mA in helium = 8.5 × 10 15 cm -3 + = 2.1 × 10 14 cm -3 and different initial concentrations of deuterium molecules [168,169]. In the absence of the discharge, HDO molecules are not detected, but appear immediately after the discharge is switched on.…”

Section: Measurements Of Concentrations Of Water Isotopomers In the Discharge Tubementioning

confidence: 99%

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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: Model Facilitiesmentioning

confidence: 99%

“…When deuterium molecules are added to the initial gas, the lines of HDO molecules appear in the absorption spectrum (Fig. 20) [168][169][170][171][172].…”

Section: Measurements Of Concentrations Of Water Isotopomers In the Discharge Tubementioning

confidence: 99%

Section: Measurements Of Concentrations Of Water Isotopomers In the Discharge Tubementioning

confidence: 99%

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

2020

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Investigation of the Concentration Dynamics of H2O and HDO Molecules in a Discharge

Cited by 1 publication

References 20 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

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