摘要
超短强激光与电子束相互作用实验平台需要加速器尽量减小对撞点的β函数,同时消去色散,使电子束在局部达到极小尺寸以获得高通量的康普顿散射光子。基于上海深紫外自由电子激光装置的激光电子束相互作用平台可利用空间非常狭小,因此满足这些要求是一项非常大的挑战。本文重点研究了Mini-beta对撞区的聚焦结构,比较了不同束流匹配条件下的束流特性,并给出了误差分析。结果表明,在目前的边界条件下,可以找到满足高亮度的超短激光-电子束相互作用要求的解决方案。
Background： It is challenging to realize very small beta function and dispersion free colliding region in a limited space. Purpose： Tiny electron beam sizes are required to achieve high flux in ultra-short and intense laser-electron campton scattering facilities. Methods： Beam characteristics for different matching conditions are studied with the presence of various alignment and field errors. Results： Beta function of laser-electron beam spot can be up to 0.01 meter and the dispersion function is zero at the same time. The optimization calculations of some main factors including magnetic field error and mechanical installation error are also performed. Conclusions： A mini-beta scheme with the achromatic treatment can be found to meet the experimental requirements.
出处
《核技术》
CAS
CSCD
北大核心
2013年第5期16-21,共6页
Nuclear Techniques
