Enhancing Penning Ion Source Performance Through Geometry Optimization

IF 2.6 3区物理与天体物理 Q3 ENGINEERING, CHEMICAL Plasma Chemistry and Plasma Processing Pub Date : 2024-06-21 DOI:10.1007/s11090-024-10489-1

Mazhar Fathi, Ehsan Ebrahimibasabi, Seyyed Mostafa Sadati, Neda Fathi Amin

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Abstract

This article presents a comprehensive investigation of the impact of cathode and anticathode geometries on the performance of a cold cathode Penning ion source. Both experimental and simulation-based approaches were employed to optimize plasma production and ion extraction. Specifically, the effects of cathode geometry on breakdown voltage and extraction current, as well as the effects of anticathode geometry on extraction current under different voltage and hydrogen gas pressure conditions, were studied for two cathode models and three anticathode models. The study also reported on the effects of setup conditions, including ignition and working pressure range, on the ion source performance during the experiment, which lasted for the first, third, and seventh days. The experimental results revealed that changes in cathode geometry under the same conditions led to a 160 V reduction in breakdown voltage and a four-fold increase in extraction current in the proposed design. Furthermore, altering the geometry of the anticathode resulted in an increase in extraction current of the ion source with the conical aperture anticathode, which exhibited greater efficiency compared to the cylindrical aperture anticathode. Overall, this study contributes to a deeper understanding of the relationship between electrode design and plasma properties in cold cathode Penning ion sources, and offers important insights for optimizing their performance and efficiency.

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通过几何优化提高潘宁离子源性能

本文全面研究了阴极和反阴极几何形状对冷阴极潘宁离子源性能的影响。采用了实验和模拟两种方法来优化等离子体的产生和离子萃取。具体来说，研究了两种阴极模型和三种反阴极模型在不同电压和氢气压力条件下，阴极几何形状对击穿电压和萃取电流的影响，以及反阴极几何形状对萃取电流的影响。研究还报告了点火和工作压力范围等设置条件对实验期间离子源性能的影响，实验持续了第一天、第三天和第七天。实验结果表明，在相同条件下，改变阴极的几何形状可使击穿电压降低 160 V，并使拟议设计中的萃取电流增加四倍。此外，改变反阴极的几何形状导致锥形孔径反阴极离子源的萃取电流增加，与圆柱形孔径反阴极相比，锥形孔径反阴极离子源的效率更高。总之，这项研究有助于加深对冷阴极潘宁离子源中电极设计与等离子特性之间关系的理解，并为优化其性能和效率提供了重要启示。

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来源期刊

Plasma Chemistry and Plasma Processing 工程技术-工程：化工

CiteScore

5.90

自引率

8.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Publishing original papers on fundamental and applied research in plasma chemistry and plasma processing, the scope of this journal includes processing plasmas ranging from non-thermal plasmas to thermal plasmas, and fundamental plasma studies as well as studies of specific plasma applications. Such applications include but are not limited to plasma catalysis, environmental processing including treatment of liquids and gases, biological applications of plasmas including plasma medicine and agriculture, surface modification and deposition, powder and nanostructure synthesis, energy applications including plasma combustion and reforming, resource recovery, coupling of plasmas and electrochemistry, and plasma etching. Studies of chemical kinetics in plasmas, and the interactions of plasmas with surfaces are also solicited. It is essential that submissions include substantial consideration of the role of the plasma, for example, the relevant plasma chemistry, plasma physics or plasma–surface interactions; manuscripts that consider solely the properties of materials or substances processed using a plasma are not within the journal’s scope.