Preliminary Measurements of a Magnetic Steering System for RF Plasma Thruster Applications

Caldarelli, Antonella; Filleul, Félicien; Charles, Christine; Rattenbury, N. J.; Cater, John

doi:10.2514/6.2021-3401

Cited by 8 publications

(2 citation statements)

References 5 publications

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“…27 Typical measurement errors inherent to the floating potential method are due to the voltage drop across the full length of the tungsten wire, here $3:5 V, combined with a knee location uncertainty of 61 V, for a total error of 62:75 V. Plasma potentials acquired with the EP have been compared with measurements recorded with a retarding field energy analyzer under multiple plasma conditions and have shown good agreement. 28…”

Section: Diagnosticsmentioning

confidence: 99%

Characterization of a new variable magnetic field linear plasma device

et al. 2021

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A radio frequency plasma device is presented in which the regions of plasma creation and maximum plasma magnetization can be separated along a 1.5-m tube. Measurements of the plasma density, plasma potential, and electron temperature in the device successfully reproduce previously reported plasma features. These validate the ability of the experiment to continue the investigation of a regime of operation in which the axial plasma density follows the profile of the applied magnetic field, as long as the ions are magnetized under the antenna. The density is shown to increase on axis owing to the decreasing cross section of the converging magnetic funnel connecting the antenna region to the solenoids. When the funnel pinching is increased, stronger magnetic fields are required to inhibit cross-field diffusion and to bring the density on axis in the expected 1012 cm−3 range. Collisionless transport of hot electron populations is observed along the field lines which intersect the area under the antenna and coincides with the presence of high-density conics more than 0.5 m away from the antenna for magnetic fields ≥600 G.

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Section: Diagnosticsmentioning

confidence: 99%

Characterization of a new variable magnetic field linear plasma device

et al. 2021

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“…The design of this probe has been extensively used in similar experiments 2,15,18,34 , and a detailed description of the RFEA and its electric circuit used herein are presented in Ref. 35. In order to map the energy of the ions, the voltage of the discriminator grid is swept from 0 V to 80 V to obtain the I-V characteristics.…”

Section: B Retarding Field Energy Analyzermentioning

confidence: 99%

Data Processing Techniques for Ion and Electron Energy Distribution Functions

Caldarelli¹,

Filleul²,

Boswell³

et al. 2022

Preprint

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Retarding field energy analyzers and Langmuir probes are routinely used to obtain ion and electron energy distribution functions (IEDF, EEDF). These typically require knowledge of the first and second derivatives of the I-V characteristics, both of which can be obtained in various ways. This poses challenges inherent to differentiating noisy signals, a frequent problem with electric-probe plasma diagnostics. A brief review of commonly used analog and numerical filtering and differentiation techniques is presented, together with their application on experimental data collected in a radio-frequency plasma. The application of each method is detailed with regards to the obtained IEDF and EEDF, the deduced plasma parameters, dynamic range, energy resolution and signal distortion.

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New Zealand’s Growing Space Sector: A Technological and Science Perspective

Rattenbury

2024

Space Law and Policy

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Preliminary Measurements of a Magnetic Steering System for RF Plasma Thruster Applications

Cited by 8 publications

References 5 publications

Characterization of a new variable magnetic field linear plasma device

Characterization of a new variable magnetic field linear plasma device

Data Processing Techniques for Ion and Electron Energy Distribution Functions

New Zealand’s Growing Space Sector: A Technological and Science Perspective

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