与多次反射飞行时间mass spectrographs配合使用的高稳定性高压电源
High-stability, high-voltage power supplies for use with multi-reflection time-of-flight mass spectrographs
摘要：
在多反射飞行时间质谱仪中实现尽可能高的质量分辨能力需要非常高稳定性的电源。为此，我们开发了一种可编程高压电源，可实现百万分之一量级的长期稳定性。在这里，我们提出了稳定的高压系统的设计和台式稳定性测量高达1~kV的稳定技术，原则上，可以应用到15~kV或更高。我们证明，在$\le$ 1~Hz波段的输出稳定性是在1百万分之一（ppm）的水平在一个小时内，只有略多的输出变化跨越3天。我们进一步证明了输出在1~Hz-200~Hz频带内基本上是无噪声的。我们还演示了在100 V阶跃转换后一分钟内建立到ppm水平。最后，我们证明，当这些电源被用来偏置的多反射飞行时间质谱仪的电极的测量的飞行时间是稳定的ppm水平至少一个小时。
英文摘要：
Achieving the highest possible mass resolving power in a multi-reflection time-of-flight mass spectrometer requires very high-stability power supplies. To this end, we have developed a programmable high-voltage power supply that can achieve long-term stability on the order of parts-per-million. Herein we present the design of the stable high-voltage system and bench-top stability measurements up to 1~kV; the stabilization technique can, in principle, be applied up to 15~kV or more.. We demonstrate that in the $\le$1~Hz band the output stability is on the level of 1~part per million (ppm) during one hour, with only slightly more output variation across 3 days. We further demonstrate that the output is largely free of noise in the 1~Hz -- 200~Hz band. We also demonstrate settling to the ppm level within one minute following a 100~V step transition. Finally, we demonstrate that when these power supplies are used to bias the electrodes of a multi-reflection time-of-flight mass spectrograph the measured time-of-flight is stable on the ppm-level for at least one hour.
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