We demonstrate the application of event-driven Timepix3-based detectors in combination with a double-sided velocity-map-imaging spectrometer to record the full 3D momentum of charged particles at the free-electron-laser facility FLASH. We measured the extreme ultraviolet induced fragmentation of N₂ using 250 kHz FLASH bursts with sub-pixel spatial resolution and up to 1.7 ns temporal resolution for photoelectrons. To further demonstrate the capabilities of this camera at even higher repetition rates we measured single-shot images of He(1s) photoelectrons for bursts with a repetition rate of 1 MHz. Overall, with the Timepix3 camera we overcome limitations of standard-camera technology for advanced-imaging experiments with requirements on high event-rates and high spatio-temporal resolution.

中文翻译：

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使用 Timepix3 逐次拍摄 250 kHz 3D 离子和 MHz 光电子成像

我们演示了基于事件驱动的 Timepix3 探测器与双面速度图成像光谱仪的结合应用，以记录自由电子激光设备 FLASH 中带电粒子的完整 3D 动量。我们使用具有亚像素空间分辨率和高达 1.7 ns 光电子时间分辨率的 250 kHz FLASH 脉冲测量了 N ₂的极紫外诱导碎裂。为了进一步展示该相机在更高重复率下的功能，我们测量了 He(1秒) 重复频率为 1 MHz 的光电子。总体而言，借助 Timepix3 相机，我们克服了标准相机技术的局限性，适用于对高事件率和高时空分辨率有要求的高级成像实验。