标题： 任意极化的非线性康普顿散射产生的$γ$光子源 显示英文标题

标题： Arbitrarily polarized $γ$-photon source from nonlinear Compton scattering

摘要： 我们研究了非线性康普顿光子源，以应对即将进行的激光粒子实验中的高能电子束与相对论性激光脉冲碰撞情景。 较强的激光场不仅可以提高散射概率，还能引起更宽的光子束发散。 为了在实际的狭角接受范围内最大化光子流，我们表明必须平衡激光强度以增强散射概率，同时限制其束流发散。 对于目前实验关注的$10~\textrm{GeV}$能量范围，平衡的激光强度位于$\xi \sim O(1)$的中间强度范围内。 在这些激光强度和电子能量范围内，被接受的光子在一个相对较窄的接受角度内表现出高度偏振，这种状态与激光脉冲的偏振密切相关，实际上暗示了一种通过激光偏振精细控制光子偏振的潜在途径。 显示英文摘要

摘要： We investigate the nonlinear Compton photon source for upcoming laser-particle experiments in the collision scenario of high-energy electron beams and relativistic laser pulses. The stronger laser field could not only improve the scattering probability but also induce broader photon beam divergence. To maximize the photon flux in a realistic narrow angular acceptance, we show that a balance must be met for the laser intensity to boost the scattering probability and simultaneously confine its beam divergence. For the currently experiment-concerned $10~\textrm{GeV}$ energy regime, the balanced laser intensity locates in the intermediate intensity regime of $\xi \sim O(1)$. In these regimes of laser intensity and electron energy, the accepted photons within a relatively narrow acceptance are highly polarized in the state closely relating to the polarization of the laser pulse, which actually implies a potential route to finely control the photon polarization via the laser polarization.