Novel modification of Hall-type ion source (study and the first results)

Goncharov, A.; Litovko, I.; Dobrovolsky, A. N.; Najko, L. V.; Najko, I. V.

doi:10.1063/1.4931789

Cited by 8 publications

(10 citation statements)

References 1 publication

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“…Even if we consider more general model description, assuming that electron heating losing occurs mostly by different kind of collisions it can show that potential distribution along gap weakly depend on electron temperature saving close to parabolic distribution. And under assumption that time of energetic losses equal electron lifetime in the gap we again come back to potential distribution (14) [18,19].…”

Section: One-dimensional Hydrodynamic and Hybrid Modelmentioning

confidence: 97%

“…The main part of generated ions leaves the system across radius, along with system axis, due to jets can appear on the edges of system. As follow from experiment [17,18], the accelerator has two operating modes: low-current with narrow anode layer and clear-cut plasma flow and high-current when plasma fills the entire volume of the accelerator. The transfer to the high-current mode occurs under influence of two parameters: worked gas pressure and applied voltage.…”

Section: Plasma Accelerator With Open Gas Wall and Closed Electron Driftmentioning

confidence: 99%

“…Dimensionless these equations and assume that position x = 0 correspond to anode and initial potential on this boundary is equal applied voltage, position x = 1 correspond to cathode, and ion current on the cathode is equal to discharge current. If we neglect diffusion for case n e >> n i , that corresponds to a low-current mode, we can get exact solution in form [18,19]:…”

Section: One-dimensional Hydrodynamic and Hybrid Modelmentioning

confidence: 99%

“…The performed modeling showed that in high-current mode the ions moving to the system center and then along the axis in both directions are able to create space charge. Experimental model of accelerator that formed ion flow converging toward the axis system was created [17,18]. In high-current mode of accelerator operation is observed plasma jet.…”

Section: Conclusion Remarksmentioning

confidence: 99%

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Modeling of Novel Plasma-Optical Systems

Litovko¹,

Goncharov²

2019

Plasma Science and Technology - Basic Fundamentals and Modern Applications

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This is the review of the current status an ongoing theoretical, simulations and some experimental researches of the novel plasma dynamical devices based on the axialsymmetric cylindrical electrostatic plasma lens (PL) configuration and the fundamental plasma-optical principles of magnetic electron isolation and equipotentialization magnetic field lines. The crossed electric and magnetic fields plasma lens configuration provides us with the attractive and suitable method for establishing stable plasma discharge at lowpressure. Using plasma lens configuration in this way some novel cost-effective, lowmaintenance, high-reliability plasma devices using permanent magnets were developed. In part, it was proposed and created device for ion treatment and deposition of exotic coatings, device for filtering dense plasma flow from micro-droplets, electrostatic plasma lens for focusing and manipulating wide aperture, high-current, low-energy, heavy metal ion plasma flow, and the effective lens was first proposed for manipulating high-current beams of negatively charged particles (negative ions and electrons). Here we mainly describe models and results of theoretical consideration and simulation of the novel generation cylindrical plasma devices.

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Section: One-dimensional Hydrodynamic and Hybrid Modelmentioning

confidence: 97%

Section: Plasma Accelerator With Open Gas Wall and Closed Electron Driftmentioning

confidence: 99%

Section: One-dimensional Hydrodynamic and Hybrid Modelmentioning

confidence: 99%

Section: Conclusion Remarksmentioning

confidence: 99%

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Modeling of Novel Plasma-Optical Systems

Litovko¹,

Goncharov²

2019

Plasma Science and Technology - Basic Fundamentals and Modern Applications

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“…6), яка базується на рiвняннях гiдродинамiки. В межах цiєї моделi було отримано точнi аналiтичнi та чисельнi розв'язки [2,3].…”

Section: теоретична модель та результатиunclassified

A New Type of Plasma Accelerator with Closed Electron Drift

et al. 2018

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Проведено подальше дослiдження плазмового прискорювача нового типу iз замкненим дрейфом електронiв та вiдкритими стiнками. В ходi лабораторного експерименту отримано вольт-ампернi характеристики прискорювача в рiзних режимах роботи. Ви-явлено два режими роботи: слабкострумовий та сильнострумовий, якi мають свої особливостi. З метою наближення запропонованої ранiше фiзико-математичної мо-делi до експерименту було здiйснено перехiд до гiбридної моделi, в якiй динамiка ней-тральної компоненти та iонiв описується кiнетичними рiвняннями. З використан-ням запропонованої моделi було чисельно отримано розподiл електричного потенцiалу в прискорюючому промiжку. Виявлено незначну рiзницю для розподiлу потенцiалу в гi-дродинамiчнiй та гiбриднiй моделях, яка полягає у бiльшому градiєнтi потенцiалу для гiбридної моделi. К л ю ч о в i с л о в а: Плазмовий прискорювач, замкнений дрейф електронiв, прискорювач холiвського типу, гiдродинамiчна модель, гiбридна модель.

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Ion acceleration in a wall-less Hall thruster

Simmonds

Raitses

2021

Journal of Applied Physics

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In wall-less Hall thrusters, the ionization of the propellant and the acceleration of the ions occur outside the thruster [S. Mazouffre, S. Tsikata, and J. Vaudolon, in 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference (American Institute of Aeronautics and Astronautics, Cleveland, OH, 2014)]. This reduces interactions between the plasma and the thruster parts as compared to conventional annular and cylindrical Hall thrusters and promises a longer thruster lifetime. With a much simpler design, these non-conventional thrusters are also easier to miniaturize for operation at low power levels of a few hundred watts and lower. In this work, experiments demonstrate that a miniaturized (3 cm diameter) 200 W wall-less thruster is also able to achieve similar voltage utilization, propellant utilization, and current utilization efficiencies as conventional Hall thrusters. Yet, thruster performance of the wall-less thruster is generally lower due to a much larger plume divergence than that in conventional Hall thrusters. This plume divergence is a consequence of ion acceleration in the fringing magnetic field. Thrust and plasma measurements suggest that the thrust generated by the wall-less thruster is due to two components: ion acceleration by the JxB force in the region of the fringing magnetic field radially away from the thruster and by plasma expansion in the diverging magnetic field near the thruster axis.

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Novel modification of Hall-type ion source (study and the first results)

Cited by 8 publications

References 1 publication

Modeling of Novel Plasma-Optical Systems

Modeling of Novel Plasma-Optical Systems

A New Type of Plasma Accelerator with Closed Electron Drift

Ion acceleration in a wall-less Hall thruster

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