Computational Model Tracking Primary Electrons, Secondary Electrons and Ions in the Discharge Chamber of an Ion Engine

Mahalingam, Sudhakar; Menart, James

doi:10.2514/6.2005-4253

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…Δt is the time step calculated in accordance with Courant stability criteria. (24) x and y are the dimensions of the simulated device, m and n are the corresponding number of grids, and Δx and Δy are the spatial grid sizes. n 0 represents the percentage of gas particles already ionized.…”

Section: Modeling and Simulationmentioning

confidence: 99%

Subtorr Operation of a Miniature Gas Ionization Sensor Based on Gold Nanowires

2009

Sensors and Materials

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Vertically aligned freestanding gold nanowires (AuNWs) were synthesized and deposited on one of the electrodes of a capacitor-like gas ionization cell, whereas the counterelectrode was a polished silicon wafer coated with aluminum on both sides. The field enhancement property of high-aspect-ratio AuNWs was employed to reduce the gaseous breakdown voltage (V b ) at room temperature. The device was characterized in low-pressure air, and tested in subtorr argon where it demonstrated a considerable reduction in V b compared with uniform field conditions and with its earlier counterparts. The dependences of V b and prebreakdown currents on the polarity of applied voltage were studied. A particle-in-cell/Monte-Carlo-collision (PIC/MCC) model for the device was also developed to simulate the breakdown process within the same pressure range in which measurements were carried out. The simulated V b -P curve showed good agreement with the measured characteristics.

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Section: Modeling and Simulationmentioning

confidence: 99%

Subtorr Operation of a Miniature Gas Ionization Sensor Based on Gold Nanowires

2009

Sensors and Materials

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Gas inlet impact on neutral density and recycle pattern with a disk shaped antenna in a miniature ion thruster through particle simulation

Yousefian

2021

AIP Advances

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The gas inlet configuration has a direct impact on the neutral density pattern within a miniature ion thruster. We aimed to investigate the impact the gas inlet configuration and neutral density pattern will have on the neutral recycle rate within a miniature ion thruster utilizing a disk shaped antenna. Four inlet configurations were considered for this study, and 3D electromagnetic particle-in-cell simulation was utilized to simulate the plasma inside the discharge chamber. The simulation results indicate a clear shift in neutral density toward the inlet, with the single horizontal inlet configuration having a 45% increase in neutral density in the vicinity of the inlet walls. The neutral recycle rate also experienced a clear shift toward the inlet walls, with the single bottom inlet configuration experiencing a 23% increase in the rate of ion loss near the inlet wall and a similar 22% increase for the single horizontal inlet while the four smaller inlets had a similar rate of neutral recycling throughout. These results are a novelty in this field as they clearly indicate the impact gas inlet and neutral density have on the miniature ion thruster’s performance and open a new area of research to further optimize the gas inlet configuration for miniature ion thrusters.

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Ion Engine Discharge Chamber Plasma Modeling Using a 2-D PIC Simulation

Mahalingam¹,

Menart²

2006

42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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Computational Model Tracking Primary Electrons, Secondary Electrons and Ions in the Discharge Chamber of an Ion Engine

Cited by 3 publications

References 16 publications

Subtorr Operation of a Miniature Gas Ionization Sensor Based on Gold Nanowires

Subtorr Operation of a Miniature Gas Ionization Sensor Based on Gold Nanowires

Gas inlet impact on neutral density and recycle pattern with a disk shaped antenna in a miniature ion thruster through particle simulation

Ion Engine Discharge Chamber Plasma Modeling Using a 2-D PIC Simulation

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