电子同步加速器新注入方法和关键技术的研究

Lower beam emmitance is an advanced direction for electron synchrotron pushed by some scientific applications such as diffraction limit photon source and high luminance collider etc. Injection is one of hard challenge for a typical Low Emmitance Ring (LER) because of rather small dynamic aperture. Traditional injection method and technique couldn’t meet the demands already. Some new injection methods and techniques for LER arise and become a research hot topic these years. In this research proposal we start from physical mechanical of injection，then deeply discuss the fundamental features of on-axial and off-axial injection, transverse and longitudinal injection, and relevant key technique to be solved. Based on that, three new injection component conceptions were proposed: Travelling-wave septum，compact super fast kicker，and longitudinal high repetition frequency pulse kicker. Through the objective of the research, theory of new injection method will be gradually improved, and the accelerator injection and ejection technology will be led to advance, and the conceptual design of three new type of injection component will be completed, and some of the key engineering problems are to be solved for application of the potential projects in the future.

在各种科学应用需求的推动下，环形电子同步加速器正朝着更低束流发射度的方向发展，例如下一代衍射极限光源、高亮度对撞机等。典型的低发射度环，动力学孔径很小，传统的注入方法和技术已经无法满足要求，各种新的注入方法和技术应运而生，成为近年来研究的热点。本项目从“注入”的物理机制出发，深入探讨在轴注入与离轴注入、横向注入与纵向注入的基本特点和有待解决的关键技术，并在此基础上，原创性的提出三种新型注入部件的概念：行波切割器、紧凑型超快冲击器，纵向高重复频率脉冲冲击器。通过本项目的研究，将逐步完善新注入方法的理论，推动加速器注入引出技术学科的发展，完成三种新型注入部件的概念设计，并为将来可能的实际工程应用解决一些关键的工程技术问题。

未来衍射极限光源和高亮度电子对撞机为了最优化低束流发射度指标，往往无法兼顾机器的动力学孔径。小动力学孔径条件下的束流注入技术是低发射度环型同步加速器面临的巨大挑战。本项目从“注入”的物理机制出发，深入探讨在轴注入与离轴注入、横向注入与纵向注入的基本特点和有待解决的关键技术，并在此基础上，原创性的提出三种新型注入部件的概念：行波切割器、紧凑型超快冲击器，纵向高重复频率脉冲冲击器，并完成一台行波切割器和一台紧凑型超快冲击器的概念样机的研制，完成纵向冲击器在轴累积注入的物理研究。本项目对新注入方法和关键技术进行有益的探索，为面临的注入技术挑战提出一些新的解决思路，并为将来可能的实际工程应用解决一些关键的工程技术问题。