能量解析飞行时间质谱仪用于批量等离子体分析
Malte Watzek1,2, Patrick Sturm1, Carsten Stoermer1
1TOFWERK AG, Schorenstrasse 39, 3645 Thun, Switzerland.
Journal of the American Society for Mass Spectrometry
|July 11, 2024
概括
为分析等离子离子,开发了一种新的能量解析飞行时间质谱仪 (E-TOFMS). 这种仪器可以同时测量能量到电荷和质量到电荷比率,从而增强等离子体分析能力.
科学领域:
- 等离子体物理学的物理学
- 质谱测量质量谱测量
- 分析化学 分析化学
背景情况:
- 批量等离子体的表征需要同时测量离子能量和质量.
- 现有的技术,如朗穆尔探测器和延迟场能量分析仪 (RFEA),在分辨率和同时测量方面存在局限性.
研究的目的:
- 设计和验证一种新型的能量分辨时间飞行质谱仪 (E-TOFMS).
- 为了实现同时分析散装等离子体中能量与电荷 (E/Q) 和质量与电荷 (m/Q) 的比率.
主要方法:
- E-TOFMS集成了一个静电部门分析仪 (ESA) 用于E/Q分辨率和一个直角反射 TOFMS 用于m/Q分析.
- 进行了电子和离子路径模拟,以优化设计选择.
- 仪器的表征涉及电子冲击,高功率脉冲磁铁喷射和微波等离子电子循环电子共振源.
主要成果:
- E-TOFMS实现了E/Q比分分辨率高达0.15V (范围为125V),m/Q比分分辨率至少为700Th (范围为250Th).
- 时间分辨率在10μs时被测量.
- 与Langmuir探测器和RFEA的验证证实了功能.
- 在喷含有同位素丰富元素 (Mo,W) 的高合金钢中已证明有效.
结论:
- 开发的E-TOFMS为全面的批量等离子体分析提供了一个强大的新工具.
- 与传统方法相比,同时进行的E/Q和m/Q测量提供了更好的洞察力.
- 仪器的性能通过各种离子源和复杂的样本分析来验证.
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