论文标题
离子迁移率对等离子体中超强激光脉冲非线性康普顿散射的影响
Impact of ion mobility on nonlinear Compton scattering of an ultra-intense laser pulse in a plasma
论文作者
论文摘要
我们证明，由高强度激光脉冲驱动的等离子体的非平底分散性会影响激光脉冲触发的基本非驱动QED过程，即使在相互作用量中没有电子中没有电子，例如，由于衡量驱动的驱动。在无电子的情况下，该血浆效应是由残留离子的响应电流介导的，作为对激光传播的分散作用。因此，残留离子是传播电磁激光场的有效背景。我们证明，这会影响电子在吸收大量激光光子（称为非线性康普顿散射）后通过电子发射的基本非线性QED过程。在两个示例性的情况下，我们发现离子等离子体可抑制和提高中级激光强度和高激光强度的光子发射率约$ 10 \％$。后一个增强没有经典的类似物。
We demonstrate that the nontrivial dispersion of a plasma driven by a high-intensity laser pulse qualitatively affects fundamental nonperturbative QED processes triggered by the laser pulse even in the case that no electrons remain in the interaction volume, e.g., due to ponderomotive expulsion. In the electron-free case this plasma effect is mediated by the response current of the residual ions as a dispersive effect on the laser propagation. The residual ions hence act as an effective background to the propagating electromagnetic laser field. We demonstrate that this has an impact on the fundamental nonlinear QED process of photon emission by an electron upon absorption of a large number of laser photons, called nonlinear Compton scattering. In two exemplary cases we find the ion plasma to suppress and enhance the photon emission rate by approximately $10\%$ for an intermediate and high laser intensity, respectively. The latter enhancement has no classical analog.
