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首页> 外文期刊>Review of Scientific Instruments >Operation of a microchannel plate counting system in a mass spectrometer
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Operation of a microchannel plate counting system in a mass spectrometer

机译：质谱仪中微通道板计数系统的操作

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A multiplier detector system has been developed as part of a mass spectrometer in an ion counting mode. During its operation ions striking a microchannel plate release pulses of electrons which are accelerated to a phosphor layer. The resulting flash of light is carried by a fiber‐optic bundle to a photodiode array. The detector simultaneously counts ions throughout a mass spectrum covering more than 30 amu. It extends the mass spectrometer’s operation toward low count rates for trace gas analysis. Each mass peak can be independently measured at count rates between 0.1 and 1000 counts/s. Higher rates on a few peaks do not blind the entire detector. The detector’s capabilities have been demonstrated by measuring Kr and Xe isotopes in air at natural abundances. The mass spectrometer, detector, and readout electronics are sufficiently compact to permit use in a balloon‐borne experiment.
机译：在离子计数模式下，已开发出一种倍增检测器系统作为质谱仪的一部分。在其操作期间，撞击微通道板的离子释放电子脉冲，该电子脉冲被加速到荧光粉层。产生的闪光被光纤束带到光电二极管阵列。检测器同时在覆盖30 amu以上的整个质谱范围内对离子进行计数。它将质谱仪的操作范围扩大到低计数率，以进行痕量气体分析。每个质量峰可以以0.1到1000个计数/秒之间的计数速率独立测量。几个峰值上的较高速率不会使整个检测器蒙蔽。该探测器的功能已通过以自然丰度测量空气中的Kr和Xe同位素得到了证明。质谱仪，检测器和读数电子设备足够紧凑，可以在气球实验中使用。

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