光学和x射线史密斯-珀塞尔辐射中的锥形衍射效应

D. Sergeeva, A. Tishchenko, M. Strikhanov
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引用次数: 24

摘要

史密斯-珀塞尔辐射是一种众所周知的现象,它为带电粒子束的诊断提供了一种非侵入性方案,并被用作电磁波的有效来源,例如在欧罗加速器、自由电子激光器等中。在本文中,我们发展了Smith-Purcell辐射理论(SPR),用于很少研究的带电粒子轨迹与光栅规则之间的任意角度的情况。这里产生的锥形衍射效应极大地改变了辐射的空间分布。与Haeberle等人所描述的唯一现有方法相比。Rev. E 55,4675(1997)],这需要困难的数值计算,我们给出了一个完整的解析理论的SPR。本文还首次提出了x射线史密斯-珀塞尔辐射理论。表面上的倏逝波通过共振机制导致了史密斯-珀塞尔辐射的强烈增强。这些结果对于描述真实的高亮度发散光束和发展基于Smith-Purcell效应的新型无创诊断方案具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Conical diffraction effect in optical and x-ray Smith-Purcell radiation
Smith-Purcell radiation is a well-known phenomenon, which provides a noninvasive scheme for diagnostics of charged particle beams and is used as an effective source of electromagnetic waves, e.g., in the orotron, the free electron laser, etc. In this paper we develop the theory of Smith-Purcell radiation (SPR) for the little-investigated case of arbitrary angles between the charged particle trajectories and the rulings of a grating. The effect of conical diffraction arising here changes drastically the space distribution of the radiation. By contrast to the only existing approach, described by Haeberle et al. [Phys. Rev. E 55, 4675 (1997)], which requires difficult numerical calculations, we give a fully analytic theory of SPR. Also, in this paper we present for the first time the theory of x-ray Smith-Purcell radiation. Evanescent waves on the surface are shown to lead to strong enhancement of Smith-Purcell radiation, through a resonant mechanism. The results are important for the description of real divergent high-brightness beams and for the development of novel noninvasive diagnostic schemes based on the Smith-Purcell effect.
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来源期刊
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审稿时长
3-8 weeks
期刊介绍: Physical Review Special Topics - Accelerators and Beams (PRST-AB), is a peer reviewed, purely electronic journal, distributed without charge to readers and funded by contributions from national laboratories. It covers the full range of accelerator science and technology: subsystem and component technologies, beam dynamics; accelerator applications; and design, operation, and improvement of accelerators used in science and industry. This includes accelerators for high-energy and nuclear physics, synchrotron radiation production, spallation neutron sources, medical therapy, and intense beam applications.
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