L-shell X-ray emission measurement of Au plasma produced by intense femtosecond laser
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摘要: 基于SILEX-Ⅰ激光器，利用单光子计数型电荷耦合器件，在超强超短脉冲激光与高纯度Au靶相互作用中，通过改变入射激光的能量，测量了不同激光功率密度下的Au等离子体L-X射线发射谱。实验结果表明:在超强超短脉冲激光作用下，Au等离子体L-X射线发射过程中由于高速电子存在，会诱发很强的热辐射和轫致辐射，并且Au等离子体特征L-X射线发射强度、热辐射和轫致辐射随激光功率密度增加而增强。
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关键词:
- 单光子计数型电荷耦合器件 /
- 探测效率 /
- 激光与物质相互作用 /
- X射线测量 /
- 激光等离子体
Abstract: Experiments on interaction between intense femtosecond laser and high-purity gold were performed on the SILEX-Ⅰ laser facility. The single-photon counting X-ray CCD camera was used to measure the L-shell X-ray emission from Au plasma at different laser power densities. The experimental results show that in the process of Au plasma X-ray emission, the high-speed electrons result in the intense bremsstrahlung and thermal radiation, and all the radiation intensity increases with the laser power density. -
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