arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.11365physics.acc-phphysics.optics
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自由电子激光产生X射线庞加莱光束

Free Electron Laser Generation of X-Ray Poincaré Beams

Jenny Morgan, Erik Hemsing, Brian W. J. McNeil, Alison Yao

摘要:

本文提出了一种无光学方法,通过在自由电子激光(FEL)上增加一个后燃室来产生具有空间变化偏振态的X射线辐射。在横向平面中的偏振的控制是通过从聚束电子束辐射的不同的相干横向光分布在两个连续的正交偏振波荡器中的重叠来获得的。通过在一个或两个波荡器中以高次谐波发射来获得不同的横向轮廓。这种方法能够产生在强度,相位和偏振方面结构化的光束-所谓的庞加莱光束-在高功率下具有可调波长。模拟被用来演示两个不同的类的光与空间不均匀的偏振-圆柱矢量光束和完整的庞加莱光束的产生。

英文摘要:

An optics-free method is proposed to generate X-ray radiation with spatially variant states of polarization via an afterburner extension to a Free Electron Laser (FEL). Control of the polarization in the transverse plane is obtained through the overlap of different coherent transverse light distributions radiated from a bunched electron beam in two consecutive orthogonally polarised undulators. Different transverse profiles are obtained by emitting at a higher harmonic in one or both of the undulators. This method enables the generation of beams structured in their intensity, phase, and polarization - so-called Poincaré beams - at high powers with tunable wavelengths. Simulations are used to demonstrate the generation of two different classes of light with spatially inhomogeneous polarization - cylindrical vector beams and full Poincaré beams.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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