Detector gain saturation is a well-known issue with the chevron microchannel plate (MCP) detector configured with two MCPs, which is widely used in the time-of-flight (TOF) mass spectrometer. In these detectors, high-intensity signals saturate the gain stages, thus reducing the magnitude of subsequent signals. To solve this issue, we developed a new detector that combines an MCP with an avalanche diode. Gain saturation was evaluated by measuring the percent of signal intensity loss of the second significant ion peak on the TOF spectrum using xenon isotopes, and then verified by argon spiked with nitrogen as a model sample.

The signal intensity ratio of ¹³²Xe/¹²⁹Xe on the chevron MCP and the new detector named ‘MIGHTION’ was 0.31 and 0.94 using the ion counting result as the reference, which corresponds to 69 % signal suppression for the chevron MCP, but only an 8% difference for MIGHTION.

By using trace-level argon spiked with nitrogen, the argon intensity change was monitored by alternately switching the nitrogen sample on and off with the ion gate. The intense nitrogen peak did not suppress the argon intensity peak, which appears $1.17\mathrm{\mu }\mathrm{s}$ later. The nitrogen peak intensity was about 240 times larger compared to argon, and the peak voltage was 3.25 V with a 50-$\mathrm{\Omega }$ load.

对于配置有两个MCP的V形人字形微通道板（MCP）检测器，检测器增益饱和是一个众所周知的问题，它广泛用于飞行时间（TOF）质谱仪中。在这些检测器中，高强度信号会使增益级饱和，从而减小后续信号的幅度。为了解决这个问题，我们开发了一种新的探测器，该探测器结合了MCP和雪崩二极管。通过使用氙同位素测量TOF光谱上第二个重要离子峰的信号强度损失的百分比来评估增益饱和度，然后通过掺入氮气的氩气作为模型样品进行验证。

以离子计数结果为参考，雪佛龙MCP和名为“ MIGHTION”的新检测器上的¹³² Xe / ¹²⁹ Xe的信号强度比分别为0.31和0.94，对应于雪佛龙MCP的69％信号抑制。 MIGHTION相差8％。

通过使用掺有氮的痕量氩气，通过用离子门交替打开和关闭氮气样品来监测氩气强度变化。强烈的氮峰并未抑制氩强度峰，出现了$\mathrm{1个}。17\mathrm{\mu }\mathrm{s}$后来。氮的峰值强度是氩的约240倍，峰值电压为3.25 V，50-$\mathrm{\Omega }$ 加载。