Helmholtz-Institut Jena, Fröbelstieg 3, 07743 Jena, Germany.
Lancaster University, Physics Department, Bailrigg, Lancaster LA1 4YW, United Kingdom.
Phys Rev Lett. 2018 Jan 26;120(4):044802. doi: 10.1103/PhysRevLett.120.044802.
A description of the spectral and angular distributions of Compton scattered light in collisions of intense laser pulses with high-energy electrons is unwieldy and usually requires numerical simulations. However, due to the large number of parameters affecting the spectra such numerical investigations can become computationally expensive. Using methods of catastrophe theory we predict higher-dimensional caustics in the spectra of the Compton scattered light, which are associated with bright narrow-band spectral lines, and in the simplest case can be controlled by the value of the linear chirp of the pulse. These findings require no full-scale calculations and have direct consequences for the photon yield enhancement of future nonlinear Compton scattering x-ray or gamma-ray sources.
强激光脉冲与高能电子碰撞中康普顿散射光的光谱和角分布描述非常复杂，通常需要进行数值模拟。然而，由于影响光谱的参数很多，这种数值研究可能会变得非常耗费计算资源。使用突变理论的方法，我们预测了康普顿散射光光谱中的高维焦散线，这些焦散线与明亮的窄带谱线有关，在最简单的情况下，它们可以通过脉冲的线性啁啾值来控制。这些发现不需要进行全面的计算，并且对未来非线性康普顿散射 X 射线或伽马射线源的光子产额增强有直接影响。
