一个封闭的飞行时间顶帽静电分析仪用于低能离子测量
Daniel J Gershman1, Levon A Avanov1,2, Glyn Collinson1,3
1NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.
The Review of scientific instruments
|December 8, 2023
概括
一个新的仪器在静电分析仪中使用门电极,以按质量-每电荷计算精确的离子分离. 这项技术增强了太空中低能离子的测量,改善了动态范围和物种识别.
科学领域:
- 太空物理空间物理学
- 等离子体仪器仪器仪表仪器仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪器仪表仪表仪表仪表仪表仪表仪器仪表仪表仪器仪表仪表仪器仪表仪表仪器仪表仪表仪器仪表仪表仪表仪表仪表仪表仪表仪表仪表仪器仪表仪表仪表仪表仪表仪器仪表仪器仪表仪器仪表仪器仪表仪表仪器仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表仪表
- 离子球研究研究.
背景情况:
- 传统仪器在测量低能离子时面临限制,原因是能量滞后和角散射.
- 带有飞行时间检测的顶级静电分析仪提供了改进的离子测量能力.
- 对离子群体的准确表征对于理解空间等离子体动态至关重要.
研究的目的:
- 开发和演示一种用于精确离子物种分离和表征的新型仪器.
- 为了评估一个封闭的静电分析仪的性能,用于低能离子测量.
- 为了展示可调节的几何因子扩大仪器动态范围的能力.
主要方法:
- 在顶级帽子静电分析仪中嵌入一个门电极.
- 使用封闭的飞行时间 (TOF) 原则来避免散射效应.
- 测试仪器原型用于分离H+,He+,O+和O2+离子.
主要成果:
- 该仪器实现了适度的质量分辨率 (M/∆M ∼10) 离子分离.
- 证明了测量事件离子原始三维分布函数的能力.
- 展示了电子调节的几何因子门电极的精确操作.
结论:
- 门式TOF仪器非常适合在太空中测量低能 (<100 eV) 热离子.
- 开发的仪器原型使得在地球的电离层中精确确定离子物种.
- 可电子调节的几何系数显著扩大了仪器的动态范围.
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