{"title":"Effects of magnetic conduction sleeve on the performance of a multi-cusped field thruster","authors":"Peng Hu , Wei Mao , Hui Liu , Daren Yu","doi":"10.1016/j.vacuum.2024.113880","DOIUrl":null,"url":null,"abstract":"<div><div>The multi-cusped field thruster is a type of plasma electric propulsion device. Several alternating polarity permanent magnets are employed to form a unique cusped magnetic field. The thruster exhibits many performance advantages such as long lifetime, extremely large range thrust throttle ability, and high thrust density. In this paper, a magnetic conduction sleeve has been designed in a multi-cusped field thruster. The experimental results show that the additional magnetic conduction sleeve can significantly reduce the plume divergence angle, shifting the peak of the ion current density towards the axis from 24.5° to 15.1°. The main reason for this is that in the exit acceleration region, the magnetic field lines near the axis bend upwards, causing the electric field to be deflected towards the axis. As a result, the ions are accelerated by this focused electric field to form a collimated plume. In addition, the magnetic conduction sleeve can also reduce the radial gradient of the magnetic field in the main ionization region, and the ionization rate is enhanced. All these effects resulting in a significant increase in both thrust and efficiency. This work presents a new solution for optimizing the performance of a multi-cusped field thruster.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"232 ","pages":"Article 113880"},"PeriodicalIF":3.8000,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vacuum","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0042207X24009266","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The multi-cusped field thruster is a type of plasma electric propulsion device. Several alternating polarity permanent magnets are employed to form a unique cusped magnetic field. The thruster exhibits many performance advantages such as long lifetime, extremely large range thrust throttle ability, and high thrust density. In this paper, a magnetic conduction sleeve has been designed in a multi-cusped field thruster. The experimental results show that the additional magnetic conduction sleeve can significantly reduce the plume divergence angle, shifting the peak of the ion current density towards the axis from 24.5° to 15.1°. The main reason for this is that in the exit acceleration region, the magnetic field lines near the axis bend upwards, causing the electric field to be deflected towards the axis. As a result, the ions are accelerated by this focused electric field to form a collimated plume. In addition, the magnetic conduction sleeve can also reduce the radial gradient of the magnetic field in the main ionization region, and the ionization rate is enhanced. All these effects resulting in a significant increase in both thrust and efficiency. This work presents a new solution for optimizing the performance of a multi-cusped field thruster.
期刊介绍：
Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences.
A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below.
The scope of the journal includes:
1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes).
2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis.
3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification.
4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.
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