Coherent oscillations excited in opposite electron and ion beams of a diaphragmed discharge between hollow electrodes

Дубинов, А. Е.; Dubinov, E. E.; Zhdanov, V. S.; Lashmanov, Yu.N.; L’vov, I. L.; Mikheev, K. E.; Sadovoi, S. A.; Селемир, В. Д.; Tsarev, A. V.

doi:10.1134/1.1321243

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…Our experimental results showed that the DGD reactor could be operated in an electrolytic solution with no electrode corrosion. To the best of our knowledge, this kind of reactor for the treatment of water-containing salts has not been reported to date ( − ).…”

Section: Introductionmentioning

confidence: 99%

Phenol Degradation by a Nonpulsed Diaphragm Glow Discharge in an Aqueous Solution

Liu

Jiang

2005

Environ. Sci. Technol.

101

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In the present study, a nonpulsed direct current diaphragm glow discharge process was developed for the first time for phenol degradation in an aqueous solution. The discharge was generated in a small hole in a dielectric diaphragm interposed between two submersed graphite electrodes. The experimental results revealed that supplied voltage, initial pH, iron salts, and radical scavengers impact the phenol degradation significantly. Enhancing the applied voltage, lowering the solution pH, and adding appropriate amounts of Fe2+ or Fe3+ to the solution were found to be favorable for phenol degradation. Carbonate ions or n-butanol in the solution can decelerate the phenol removal. When the treatment time is increased, the pH value of the solution decreased, leading to an increase in the phenol decomposition. It was revealed by high performance liquid chromatography and ionic chromatography that the main intermediates of phenol decomposition are hydroquinone, pyrocatechol, p-benzoquinone and organic acids. In comparison with the high-voltage corona discharge plasma in distilled water, this process offers simple technology, higher energy efficiency, easier scaleup, and easier applicability to salt-containing wastewater with no electrode erosion and electromagnetic radiation.

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Section: Introductionmentioning

confidence: 99%

Phenol Degradation by a Nonpulsed Diaphragm Glow Discharge in an Aqueous Solution

Liu

Jiang

2005

Environ. Sci. Technol.

101

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“…Earlier, observation of high-frequency oscillations of various natures in a hollow-cathode discharge was reported in [5,6]. Therefore, application of these oscillations for the generation purposes is a natural decision.…”

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confidence: 96%

High-power pulsed high-frequency generator based on the hollow-cathode discharge

Дубинов

L’vov

Sadovoy

et al. 2006

Radiophys Quantum Electron

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We describe a high-power high-frequency generator based on the hollow-cathode gas discharge. In the frequency range from 10 to 30 MHz, the output-signal power of this simple device with a cold cathode reaches 1 MW. The duration of the high-frequency pulse ranges from 0.4 to 1 µs.In terms of their simplicity, reliability, and effectiveness, generators of high-power high-frequency pulses based on the hollow-cathode discharge [1, 2] can be promising for many scientific and practical applications.The nature of the hollow-cathode discharge considered in detail in [3] provides a sufficient number of oscillational degrees of freedom [4]. Earlier, observation of high-frequency oscillations of various natures in a hollow-cathode discharge was reported in [5,6]. Therefore, application of these oscillations for the generation purposes is a natural decision. The authors of [7] presented the results of the first stage of studying a high-frequency generator based on the hollow-cathode discharge.This paper describes a novel generator with the Fig. 1. Appearance of the gas-discharge chamber of a high-frequency generator.hollow-cathode discharge, which forms high-power highfrequency pulses in the load circuit. A possible explanation for the appearance of the instability responsible for the high-frequency generation in a hollow-cathode gas discharge was given in [8,9]. Namely, it is the cathode-layer instability that leads to negative differential conductance at a certain frequency. The basis of the generator is the gas-discharge chamber, whose appearance is shown in Fig. 1, and the design scheme, in Fig. 2. The hollow cathode, anode, and insulator are the main elements of the chamber. The hollow cathode was made of a 0.3-mm thick sheet of stainless steel. It was rolled into a cylinder with the required diameter 100-200 mm and fixed in the vacuum chamber by means of special clamp 4. To change the depth of the hollow cathode, sheets with different widths were used. In the experiments, the internal diameter of the cathode was 150 mm, and its length, 170 mm. Technological nozzle 1 for gas evacuation is fixed at the end of vacuum chamber 2 made of stainless steel. Anode 6 is a solid stainless-steel cylinder of 70 mm in diameter. It was located coaxially to the hollow cathode at a distance of 25 mm from its open end. The anode was fixed on caprolon disk 7 which served as the insulator and the vacuum-tight flange of the chamber.

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“…High-frequency oscillations of various kinds have been observed in hollow-cathode discharges [5,6]; hence, the application of these oscillations for generation purposes is a natural choice.…”

mentioning

confidence: 99%

A high-power, high-frequency pulse generator based on a hollow-cathode discharge

Vyalykh¹,

Дубинов²,

L’vov³

et al. 2005

Instrum Exp Tech

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Coherent oscillations excited in opposite electron and ion beams of a diaphragmed discharge between hollow electrodes

Cited by 4 publications

References 5 publications

Phenol Degradation by a Nonpulsed Diaphragm Glow Discharge in an Aqueous Solution

Phenol Degradation by a Nonpulsed Diaphragm Glow Discharge in an Aqueous Solution

High-power pulsed high-frequency generator based on the hollow-cathode discharge

A high-power, high-frequency pulse generator based on a hollow-cathode discharge

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