We demonstrate stable high-brightness operation of an electron-impact water-jet-anode soft x-ray source. A 30 kV, 7.8 W electron beam is focused onto a 20 μm diameter jet resulting in water-window oxygen line emission at 525 eV/2.36 nm with a brightness of 3.0×109 ph/(s×μm2×sr×line). Monte Carlo-based modeling shows good quantitative agreement with the experiments. The source has potential to increase the x-ray power and brightness by another 1–2 orders of magnitude and fluid-dynamical jet instabilities is determined to be the most important limiting factor. The source properties make it an attractive alternative for table-top x-ray microscopy.
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机译：我们演示了电子撞击水射流阳极软X射线源的稳定高亮度操作。将30 kV，7.8 W的电子束聚焦到直径为20μm的射流上，从而在525 eV / 2.36 nm处发射水窗氧气线，亮度为3.0×109 ph /（s×μm2×sr×线）。基于蒙特卡洛的模型显示出与实验良好的定量一致性。该源有潜力将X射线功率和亮度再提高1-2个数量级，流体动力射流的不稳定性被认为是最重要的限制因素。光源特性使其成为台式X射线显微镜的诱人替代品。
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