一个9千电子伏特的电子撞击液态镓射流X射线源。
A 9 keV electron-impact liquid-gallium-jet x-ray source.
作者信息
Otendal M, Tuohimaa T, Vogt U, Hertz H M
机构信息
Biomedical and X-Ray Physics, Department of Applied Physics, Royal Institute of Technology/Albanova, SE-10691 Stockholm, Sweden.
出版信息
Rev Sci Instrum. 2008 Jan;79(1):016102. doi: 10.1063/1.2833838.
We demonstrate a high-brightness compact 9 keV electron-impact microfocus x-ray source based on a liquid-gallium-jet anode. A approximately 30 W, 50 kV electron gun is focused onto the approximately 20 ms, 30 mum diameter liquid-gallium-jet anode to produce an approximately 10 microm full width at half maximum x-ray spot. The peak spectral brightness is >2 x 10(10) photons(s mm(2) mrad(2)x0.1% BW). Calculation and experiments show potential for increasing this brightness by approximately three orders of magnitude, making the source suitable for laboratory-scale x-ray crystallography and hard x-ray microscopy.
我们展示了一种基于液态镓射流阳极的高亮度紧凑型9keV电子撞击微焦点X射线源。一个约30W、50kV的电子枪聚焦到约20ms、直径30μm的液态镓射流阳极上，以产生半高宽约10μm的X射线光斑。峰值光谱亮度大于2×10¹⁰光子/(秒·平方毫米·毫弧度²·0.1%带宽)。计算和实验表明，该亮度有潜力提高约三个数量级，使该源适用于实验室规模的X射线晶体学和硬X射线显微镜。
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