High-resolution modeling of nonlinear Compton scattering in focused laser pulses

High-resolution modeling of nonlinear Compton scattering in focused laser pulses
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聚焦激光脉冲中非线性康普顿散射的高分辨率建模

DOI:
10.1103/physrevd.106.013010
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发表时间:
2022
期刊:
影响因子:
5
通讯作者:
King, B.
King, B.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Nielsen, C. F.;Holtzapple, R.;King, B.

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用半经典方法计算了电子与强聚焦激光脉冲碰撞时的辐射发射。结果与平面波的精确数值计算结果进行了基准测试,并与局部常数场和局部单色近似的预测结果进行了比较。研究发现,采用半经典方法的模拟可以捕捉到局域方法无法捕捉到的能量谱特征,如亚谐波和带宽结构。当电子通过脉冲传播时,引入形成长度作为一种诊断选择。
A semiclassical approach is used to calculate radiation emission in the collision of an electron with an intense focused laser pulse. The results are benchmarked with numerical calculations of exact results in a plane wave and compared to predictions from the locally constant field and locally monochromatic approximations. It is found that simulations employing the semiclassical approach capture features in the energy spectra, such as subharmonics and bandwidth structure, which are beyond local approaches. The formation length is introduced as a diagnostic to select between approaches as the electron is propagated through the pulse.
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