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Enhanced coherent Thomson scattering in the few-cycle regime

机译：少周期状态下增强的相干Thomson散射

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摘要

We study x-ray production by coherent nonlinear Thomson scattering of few-cycle laser pulses from relativistic electron sheets. For an electron sheet thicker than the wavelength of the x-ray, the scattering efficiency is found to increase by two orders of magnitude for single-cycle laser pulses, as compared with longer pulses. This enhancement is attributed to the suppression of the destructive interference during the scattering process, as well as the frequency downshift related to the ultrabroad spectra of single-cycle pulses. The x-ray amplitude in this nonadiabatic regime is calculated and agrees with that from the particle-in-cell simulation. These results can be useful for designing more intense, shorter attosecond x-ray sources. (C) 2016 Optical Society of America
机译：我们研究了相对论电子片的几个周期激光脉冲的相干非线性Thomson散射产生的X射线。对于比X射线波长更厚的电子片，与更长的脉冲相比，发现单周期激光脉冲的散射效率提高了两个数量级。这种增强归因于在散射过程中对相消干扰的抑制，以及与单周期脉冲超宽频谱有关的频率下移。计算了这种非绝热状态下的X射线振幅，并与“粒子在细胞内的模拟”结果一致。这些结果对于设计更强，更短的阿秒X射线源很有用。 （C）2016美国眼镜学会

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