arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0912.4161physics.optics
收藏

X射线自由电子激光辐射的统计和相干特性

Statistical and coherence properties of radiation from X-ray free electron lasers

E. L. Saldin, E. A. Schneidmiller, M. V. Yurkov

摘要:

本文描述了X射线自由电子激光(XFEL)辐射的统计特性和相干特性。结果表明,饱和前的X射线自由电子激光辐射可用高斯统计描述。特别重要的是优化的X射线自由电子激光的情况下,详细研究。应用相似技术的数值模拟结果,使我们能够找到通用的缩放关系的主要特征的X射线自由电子激光工作在饱和制度:效率,相干时间和横向相干度。我们发现,与适当的归一化的这些量,它们是功能的电子束的几何发射率的辐射波长的比率。辐射的高次谐波的统计和相干特性也被突出显示。

英文摘要:

We describe statistical and coherence properties of the radiation from x-ray free electron lasers (XFEL). It is shown that the X-ray FEL radiation before saturation is described with gaussian statistics. Particularly important is the case of the optimized X-ray FEL, studied in detail. Applying similarity techniques to the results of numerical simulations allowed us to find universal scaling relations for the main characteristics of an X-ray FEL operating in the saturation regime: efficiency, coherence time and degree of transverse coherence. We find that with an appropriate normalization of these quantities, they are functions of only the ratio of the geometrical emittance of the electron beam to the radiation wavelength. Statistical and coherence properties of the higher harmonics of the radiation are highlighted as well.

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。

↑