Note: Diagnosing femtosecond laser-solid interactions with monochromatic Kα imager and x-ray pinhole camera.
Note: Diagnosing femtosecond laser-solid interactions with monochromatic Kα imager and x-ray pinhole camera.
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DOI：
10.1063/1.3567014
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发表时间：
2011-03
期刊：
影响因子：
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通讯作者：
X. Lin;Y. Li;F. Liu;B. Liu;F. Du;S. Wang;L. Chen;L. Zhang;Y. Zheng;X. Liu;X. Liu;Z. Wang;J. Ma;Z. Wei;J. Zhang
中科院分区：
文献类型：
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作者：
X. Lin;Y. Li;F. Liu;B. Liu;F. Du;S. Wang;L. Chen;L. Zhang;Y. Zheng;X. Liu;X. Liu;Z. Wang;J. Ma;Z. Wei;J. Zhang
用X射线针孔相机和单色K(α)成像仪测量了强飞秒激光脉冲与铜箔靶的相互作用。这两种诊断方法在光斑大小和激光能量定标方面具有不同的特征，这是由不同的物理过程造成的。在我们的实验条件下，K(α)发射主要是由冷体靶内部传输的快电子激发的。相反，X射线针孔信号主要由靶前表面热等离子体的宽带热X射线辐射主导。
An x-ray pinhole camera and a monochromatic K(α) imager are used to measure the interactions of intense femtosecond laser pulses with Cu foil targets. The two diagnostics give different features in the spot size and the laser energy scaling, which are resulted from different physical processes. Under our experimental conditions, the K(α) emission is mainly excited by the fast electrons transporting inside the cold bulk target. In contrast, the x-ray pinhole signals are dominated by the broadband thermal x-ray emission from the hot plasma at the front target surface.