A continuous kilohertz Cu Kα source produced by submillijoule femtosecond laser pulses for phase contrast imaging
A continuous kilohertz Cu Kα source produced by submillijoule femtosecond laser pulses for phase contrast imaging
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DOI：
10.1063/1.3046727
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发表时间：
2008-12
影响因子：
4
通讯作者：
J. A. Chakera;A. Ali;Y. Tsui;R. Fedosejevs
中科院分区：
文献类型：
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作者：
J. A. Chakera;A. Ali;Y. Tsui;R. Fedosejevs
我们报告了一种由商用千赫兹亚毫焦飞秒激光系统产生的连续运行的 Cu Kα X 射线源。该源将 ∼4×10−5 的 X 射线转换为 8.05 keV 的 Kα 线发射。微等离子体 X 射线源的尺寸为 8 μm（半高全宽），通过将 260 μJ 激光脉冲聚焦在移动的铜线目标上而产生。使用上述激光脉冲获得~1.1×109光子/sr/s的平均光子通量。该源已用于记录测试样本的相差图像。这种紧凑的 X 射线源可以作为临床应用中相衬成像的低成本操作系统。
We report a continuously operated Cu Kα x-ray source produced by a commercial kilohertz submillijoule femtosecond laser system. The source has an x-ray conversion of ∼4×10−5 into Kα line emission at 8.05 keV. The microplasma x-ray source has a size of 8 μm (full width at half maximum) produced by focusing 260 μJ laser pulses on a moving Cu-wire target. An average photon flux of ∼1.1×109 photons/sr/s is obtained using the above laser pulses. The source has been used to record phase contrast images of test samples. This compact x-ray source can serve as a low cost operating system for phase contrast imaging in clinical applications.