Thomson scattering of intense lasers from electron beams at arbitrary interaction angles.
Thomson scattering of intense lasers from electron beams at arbitrary interaction angles.
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DOI：
10.1103/physreve.52.5425
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发表时间：
1995-11
期刊：
影响因子：
--
通讯作者：
Ride;Esarey;Baine
中科院分区：
文献类型：
--
作者：
Ride;Esarey;Baine
本文将相对论电子束对强激光非线性汤姆逊散射的分析扩展到描述离轴散射几何。计算了任意强度的平面电磁波（圆极化或线极化）与相对论性电子束以任意相互作用角度相互作用时的电子轨迹。利用这些轨迹推导出散射辐射强度分布的解析表达式。这些表达式在非线性条件下（任意激光强度）是有效的，并且包含了谐波的产生。讨论了相互作用角对光强分布的影响，并对正散射和横向散射的具体情况进行了光谱数值绘制。x射线频率、脉冲持续时间和光子通量对相互作用几何形状的依赖性也进行了研究。讨论了在激光同步加速器源中的应用。正面和横向相互作用几何都有潜在的优点：正面散射导致产生更高的频率和更高的光子通量；正入射散射可产生超短x射线脉冲。
Analysis of nonlinear Thomson scattering of intense lasers from relativistic electron beams is extended to describe off-axis scattering geometries. Electron trajectories are calculated for the case of a plane electromagnetic wave of arbitrary intensity, either circularly or linearly polarized, interacting with a relativistic electron beam at an arbitrary interaction angle. The trajectories are used to derive analytic expressions for the intensity distribution of the scattered radiation. These expressions are valid in the nonlinear regime (arbitrary laser intensity) and include the generation of harmonics. The effect of interaction angle on the intensity distribution is discussed and spectra are plotted numerically for the specific cases of head-on and transverse scattering. The dependence of x-ray frequency, pulse duration, and photon flux on interaction geometry are also examined. Applications to the laser synchrotron source are discussed. There are potential advantages of both head-on and transverse interaction geometries: head-on scattering results in the generation of higher frequencies and higher photon fluxes; normal incidence scattering can result in ultrashort x-ray pulses.