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一个紧的射频离子源的高亮度和低能量传播负氧离子束生产负氧离子束
Y Zhou1,2, Y J Zhai1,2, Q Y Jin1,2
1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
The Review of scientific instruments
|September 1, 2023
概括
为二次离子质谱 (SIMS) 开发了一种新的射频 (RF) 离子源. 它有效地产生具有高亮度和低能量传播的负氧离子束,这对于高质量分析至关重要.
科学领域:
- 物理 物理学 物理
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 高质量的初级离子束对于二次离子质谱 (SIMS) 分析至关重要.
- 现有的离子源往往面临着亮度和能量传播的限制.
- 开发先进的离子源是必要的,以提高SIMS的性能.
研究的目的:
- 开发和描述一个紧的射频 (RF) 离子源,用于产生负氧离子束.
- 为了评估潜在的SIMS应用的离子源的性能.
- 介绍新型射频离子源的模拟,设计和实验结果.
主要方法:
- 一个带有平面螺旋天线的13.56 MHz射频离子源的设计和建造.
- 纳入多磁场用于等离子体封闭.
- 使用三电极提取系统进行离子束提取.
- 实验测量提取的离子束电流,物种分布,能量分布和亮度.
主要成果:
- 成功提取了超过50μA的负氧离子束.
- 提取的光束包括56%的O,25%的O2和19%的O3离子.
- 达到了6.3 eV的最小离子能量扩散 (∆E),表现出高斯分布.
- 估计O光束的亮度为82.4 A m-2 Sr-1 V-1.1.
结论:
- 开发的紧型射频离子源是SIMS生产高质量的负氧离子束的有希望的候选者.
- 该源显示出高亮度和低能量传播,满足高级SIMS应用程序的关键要求.
- 进一步的研究和优化可能会提高更广泛应用的性能.
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