Parameters influencing plasma column potential in a reflex discharge

Liziakin, G. D.; Gavrikov, A. V.; Murzaev, Y. A.; Usmanov, R. A.; Smirnov, V. P.

doi:10.1063/1.4969084

Cited by 27 publications

(9 citation statements)

References 28 publications

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“…However, many different driving mechanisms (e. g collisions with neutral, instabilities and turbulence [302], magnetic fluctuations [303], ion viscosity [304]) are known to contribute to σ⊥ depending on the operating plasma conditions, and new driving mechanisms continue to be uncovered [305], [306]. Demonstrating the practicality of crossed-field mass filter concepts hence hinges on a comprehensive understanding of perpendicular conductivity, which we believe will be best obtained by a combination of modeling and experiments [293], [307]. Another outstanding issue in the presence of neutrals is the possible upper limit set on the rotation speed by the critical ionization velocity phenomenon [308].…”

Section: Advances In Science and Technology To Meet Challengesmentioning

confidence: 99%

Physics of E × B discharges relevant to plasma propulsion and similar technologies

et al. 2020

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This paper provides perspectives on recent progress in the understanding of the physics of devices where the external magnetic field is applied perpendicularly to the discharge current. This configuration generates a strong electric field, which acts to accelerates ions. The many applications of this set up include generation of thrust for spacecraft propulsion and the separation of species in plasma mass separation devices. These "E×B" plasmas are subject to plasma-wall interaction effects as well as various micro and macro instabilities, and in many devices, we observe the emergence of anomalous transport. This perspective presents the current understanding of the physics of these phenomena, state-of-the-art computational results, identifies critical questions, and suggests directions for future research.

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Section: Advances In Science and Technology To Meet Challengesmentioning

confidence: 99%

Physics of E × B discharges relevant to plasma propulsion and similar technologies

et al. 2020

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“…This configuration looks most like a classical reflex discharge (Liziakin et al. 2016). In this case, j from (3.4) can be substituted by the density of the ion saturation current (Lieberman & Lichtenberg 2005) times the number of ends with electrodes (1 or 2).…”

Section: Radial Profile Of the Potentialmentioning

confidence: 85%

Radial distribution of the plasma potential in a cylindrical plasma column with a longitudinal magnetic field

et al. 2021

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The possibility of controlling the electrostatic field distribution in plasma has yielded wide prospects for modern technologies. As a magnetic field primarily allows for creating electric fields in plasma, it serves as an additional obstacle for the current flow through a medium. In the present paper, an axially symmetric system is considered in which the magnetic field is directed along the axis and concentric electrodes are located at the ends. The electrodes are negatively biased. A model which solves the problem of the radial distribution of the plasma potential inside the cylindrical plasma column supported by the end electrodes is proposed. The most commonly encountered configurations of the electrical connection for the end electrodes are considered, and the particular solutions to the problem of the radial distribution are presented. The contribution of ions and electrons to the transverse conductivity is evaluated in detail. The influence of a thermionic element on the radial profile of the plasma potential is considered. To verify the proposed model, an experimental study of the reflex discharge is carried out with both cold electrodes and a thermionic element on the axis. A comparison of the computational model results with experimental data is given. The presented model makes it possible to solve the problem concerning the plasma potential distribution in the case of an arbitrary number of end electrodes, and also to take into account the inhomogeneity of the distribution of plasma density, neutral gas pressure and electron temperature along the radius.

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“…Приведенная схема измерений имеет преимущества над методом ленгмюровских зондов [21] в том, что данные измерения не вносят возмущения в сам разряд [26]. В центральной области анода образуется более плотная плазма.…”

Section: экспериментальное оборудованиеunclassified

Разрядные Характеристики Плазменного Источника Пеннинга

Мамедов¹,

Щитов²,

Колодко³

et al. 2018

Журнал Технической Физики

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Представлены результаты исследований разрядных характеристик плазменного источника Пеннинга. Измерены вольт-амперные характеристики (ВАХ), энергетическое распределение и масс-зарядовый состав ионов, эмитируемых из разряда при различных режимах его горения. Установлена связь между всплесками тока разряда и увеличением провисания потенциала (до 50% от напряжения на аноде). Измеренные ВАХ хорошо согласуются с теоретическими зависимостями. Показано, что содержание атомарных ионов водорода повышается с 5 до 10% при увеличении анодного напряжения от 1 до 3.5 kV и вкладываемой в разряд мощности (от 0.2 до 3 W).

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Parameters influencing plasma column potential in a reflex discharge

Cited by 27 publications

References 28 publications

Physics of E × B discharges relevant to plasma propulsion and similar technologies

Physics of E × B discharges relevant to plasma propulsion and similar technologies

Radial distribution of the plasma potential in a cylindrical plasma column with a longitudinal magnetic field

Разрядные Характеристики Плазменного Источника Пеннинга

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