基于谐波运行的中等能量X射线自由电子激光研究

项目名称： 基于谐波运行的中等能量X射线自由电子激光研究

项目编号： No.11205234

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学II

项目作者： 邓海啸

作者单位： 中国科学院上海应用物理研究所

项目金额： 30万元

中文摘要： 基于先进加速器的X射线自由电子激光（FEL），具有极高的时间、空间分辨率和峰值亮度，被誉为第四代先进光源，国际上已经运行、在建和设计中的X射线FEL，电子束能量范围为5.8-17GeV。2012年，本项目申请人提出了中等能量X射线FEL振荡器概念[Phys. Rev. Lett 108, 034802 (2012)]，即基于FEL的谐波运行，利用3.5GeV的中等能量电子束团，产生光子能量范围在10-25keV的时间空间全相干辐射。本项目将通过理论分析和数值模拟，对基于谐波运行的中等能量X射线FEL振荡器进行全面系统的探索，完善细化其中的物理环节和技术问题，并结合国际上FEL的最新进展，发展基于谐波运行的中等能量X射线FEL放大器等新机理，为我国未来的X射线FEL装置的建设奠定良好的理论基础和提供充分的设计依据。

中文关键词： 自由电子激光；X射线；紧凑型；振荡器；谐波运行

英文摘要： In recent decades, there has been an increasing interest in the development of x-ray free electron laser (FEL), known as the fourth generation light source, capable of enabling new areas of science. The presently existing x-ray FEL facilities are working with an electron beam of 5.8-17GeV, which mean large machines with substantial cost, time, and effort requirement. Recently, an x-ray FEL oscillator with intermediate energy electron beam was proposed, where fully coherent FEL radiation with megawatt peak power, in the spectral region of 10-25keV, can be generated with a 3.5GeV electron beam. As a new approach, there are still several issues needs to be addressed, such as thermal loading effects, undulator errors and other imperfections. Therefore, intensive studies of the intermediate energy x-ray FEL oscillator are expected in this grant, by theoretical analysis and numerical simulation. Moreover, new mechanism such as the intermediate energy x-ray FEL amplifier will be developed. It is hoped that our study will be useful for the future x-ray FEL projects in China.

英文关键词： free electron laser；X-ray；compact；oscillator；harmonic lasing