We describe a magnetic bottle time-of-flight electron spectrometer designed for time-resolved photoemission spectroscopy of a liquid microjet using extreme UV and X-ray radiation. The spectrometer can be easily reconfigured depending on experimental requirements and the energy range of interest. To improve the energy resolution at high electron kinetic energy, a retarding potential can be applied either via a stack of electrodes or retarding mesh grids, and a flight-tube extension can be attached to increase the flight time. A gated electron detector was developed to reject intense parasitic signal from light scattered off the surface of the cylindrically shaped liquid microjet. This detector features a two-stage multiplication with a microchannel plate plus a fast-response scintillator followed by an image-intensified photon detector. The performance of the spectrometer was tested at SPring-8 and SACLA, and time-resolved photoelectron spectra were measured for an ultrafast charge transfer to solvent reaction in an aqueous NaI solution with a 200 nm UV pump pulses from a table-top ultrafast laser and the 5.5 keV hard X-ray probe pulses from SACLA.

中文翻译：

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用于液体微射流时间分辨极紫外和 X 射线光电子能谱的磁瓶电子能谱仪的设计和表征

我们描述了一种磁瓶飞行时间电子光谱仪，其设计用于使用极端紫外线和 X 射线辐射对液体微射流进行时间分辨光电发射光谱。光谱仪可以根据实验要求和感兴趣的能量范围轻松重新配置。为了提高高电子动能下的能量分辨率，可以通过电极堆栈或减速网格施加减速电位，并且可以连接飞行管延伸件以增加飞行时间。开发了一种门控电子检测器，以抑制从圆柱形液体微射流表面散射的光中产生的强烈寄生信号。该探测器具有两级倍增功能，带有一个微通道板和一个快速响应闪烁体，然后是一个图像增强光子探测器。