Emittance in nonlinear Thomson scattering

Emittance in nonlinear Thomson scattering
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非线性汤姆逊散射中的发射率

DOI:
10.1103/physrevaccelbeams.25.054401
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发表时间:
2022
影响因子:
1.7
通讯作者:
Terzić, Balša
Terzić, Balša
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Johnson, Erik;Breen, Elizabeth;Krafft, Geoffrey A.;Terzić, Balša

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逆康普顿散射源越来越多地用作高能光子的强源。当在高场强下工作时,散射发射的质动力失谐会导致源性能下降。到目前为止,这种非线性汤姆逊散射的光谱计算是在假设完美对准的电子与入射激光束相互作用的情况下完成的,并且一些作者已经研究了是否可以通过合适的入射激光啁啾处方来减轻或治愈质动力失谐。为了确定这些啁啾规定是否适用于具有非零发射率的真实光束,有必要在电子运动中包括未对准的边界条件,并根据精确运动计算所得光谱。在本文中,我们提供了在未对准的电子通过高场强激光脉冲的情况下电子运动方程的精确解。然后使用该解决方案计算散射辐射分布,并确定最简单的线性调频方案的发射度限制。
Inverse Compton scattering sources are finding increasing use as intense sources of high-energy photons. When operated at high field strength, ponderomotive detuning of the scattered emission can lead to decreased source performance. Up to now, the calculations of spectra for such nonlinear Thomson scattering have been done assuming a perfectly aligned electron interacts with the incident laser beam and several authors have investigated whether pondermotive detuning may be mitigated or cured by suitable incident laser chirping prescriptions. In order to determine if these chirping prescriptions are suitable in real beams with nonzero emittance, it is necessary to include misaligned boundary conditions in the electron motion and calculate the resulting spectra from the exact motion. In this paper we provide the exact solution for the electron equations of motion in the case of a misaligned electron passing through a laser pulse of high field strength. This solution is then used to calculate the scattered radiation distribution and we determine the emittance limits for the simplest chirping prescription.
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