Some issues of the operation of plasma opening switches

Abstract The paper analyzes some processes in a plasma opening switch with a conduction time of ~ 100 ns. Relations are derived for assessing the evolution of the ion current to its space charge-limited state and for estimating its maximum possible density. It is shown that the ion current density reaches its extremum before electron magnetization. Estimates for the electromagnetic energy delivered to the switch are also presented demonstrating that this energy is spent equally for creating a magnetic field in the plasma volume and for its ohmic heating.

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Transverse Ion Current Density Profile of Laser Ablation Plasma Propagating through Multicusp Magnetic Field

IEEJ Transactions on Fundamentals and Materials ◽

10.1541/ieejfms.138.553 ◽

2018 ◽

Vol 138 (11) ◽

pp. 553-554 ◽

Cited By ~ 1

Author(s):

Kazumasa Takahashi ◽

Keisuke Ikegami ◽

Yuta Wada ◽

Toru Sasaki ◽

Takashi Kikuchi

Keyword(s):

Magnetic Field ◽

Laser Ablation ◽

Density Profile ◽

Current Density ◽

Ion Current ◽

Current Density Profile ◽

Ablation Plasma ◽

Laser Ablation Plasma ◽

Ion Current Density

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Radiation-induced change of polyimide properties under high-fluence and high ion current density implantation

Applied Physics A ◽

10.1007/s00339-003-2166-9 ◽

2004 ◽

Vol 78 (7) ◽

pp. 1067-1072 ◽

Cited By ~ 17

Author(s):

V.N. Popok ◽

I.I. Azarko ◽

R.I. Khaibullin ◽

A.L. Stepanov ◽

V. Hnatowicz ◽

...

Keyword(s):

Current Density ◽

Ion Current ◽

High Fluence ◽

Radiation Induced ◽

Ion Current Density

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Effect of plasma nitriding ion current density on the nitriding kinetics and tribological properties of composite CrAlN coatings

Ceramics International ◽

10.1016/j.ceramint.2021.10.182 ◽

2021 ◽

Author(s):

Xin Zhang ◽

Xiubo Tian ◽

Chunzhi Gong ◽

Xiangli Liu ◽

Jin Li ◽

...

Keyword(s):

Tribological Properties ◽

Current Density ◽

Plasma Nitriding ◽

Ion Current ◽

Ion Current Density

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Far-Field Plume Characterization of a 100-W Class Hall Thruster

Aerospace ◽

10.3390/aerospace7050058 ◽

2020 ◽

Vol 7 (5) ◽

pp. 58

Author(s):

Thibault Hallouin ◽

Stéphane Mazouffre

Keyword(s):

Energy Distribution ◽

Current Density ◽

Low Voltage ◽

Ion Current ◽

Hall Thruster ◽

Far Field ◽

Ion Energy ◽

Ion Energy Distribution ◽

The Core ◽

Ion Current Density

The 100 W-class ISCT100-v2 Hall Thruster (HT) has been characterized in terms of far-field plume properties. By means of a Faraday Cup and a Retarding Potential Analyzer, both the ion current density and the ion energy distribution function have been measured over a 180 ∘ circular arc for different operating points. Measurements are compared to far-field plume characterizations performed with higher power Hall thrusters. The ion current density profiles remain unchanged whatever the HT input power, although an asymptotic limit is observed in the core of the plume at high discharge voltages and anode mass flow rates. In like manner, the ion energy distribution functions reveal that most of the beam energy is concentrated in the core of the plume [ − 40 ∘ ; 40 ∘ ] . Moreover, the fraction of low energy ion populations increases at large angles, owing to charge exchange and elastic collisions. Distinct plume regions are identified; they remain similar to the one described for high-power HTs. An efficiency analysis is also performed in terms of current utilization, mass utilization, and voltage utilization. The anode efficiency appears to be essentially affected by a low voltage utilization, the latter originating from the large surface-to-volume ratio inherent to low-power HTs. Experimental results also show that the background pressure clearly affects the plume structure and content.

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