AI 中文总结
提出通过特定相空间操纵及激光调制器实现弱强稳态微聚束的方法，可将束团转换为超高谐波密度调制或进行能量聚束，应用于多种辐射产生及束长能量控制，为加速器相关研究与开发建立新范式。
AI 中文摘要
我们提出一种相空间操纵方法，通过两个色散段夹一个能量调制，将聚束粒子束或束团序列转换为超高谐波密度调制，能量调制原则上可任意弱。该方案也可用于能量聚束。还提出一种在储存环中用三个激光调制器纵向聚焦电子束的机制，实现微聚束序列及其高密度谐波或能量聚束逐圈形成并维持，即弱强稳态微聚束（Weak-Strong SSMB）。纵向β函数沿环可变化七个数量级，最小值压缩到10纳米。给出了Weak-Strong SSMB用于千瓦级相干极紫外辐射的示例应用，预计可扩展到X射线，能级电子束可产生γ射线频率梳，这些想法可扩展到射频和太赫兹波长，用于束长和能量展宽控制、超短X射线和相干太赫兹产生。我们的工作为纵向动力学研究和加速器光源开发建立了新范式，为加速器物理和技术开辟了巨大潜力。
英文摘要
We propose a phase space manipulation involving one energy modulation sandwiched by two dispersion sections which converts a bunched particle beam or bunch train to ultra-high-harmonic density modulation, while the energy modulation in principle can be arbitrarily weak. The same scheme can also be used for energy bunching, creating energy levels in a bunched beam. We further propose a mechanism invoking three laser modulators in a storage ring to longitudinally focus the electron beam both weakly and strongly, such that a microbunch train and its high-density-harmonics or energy bunching form and sustain turn-by-turn. We call this mechanism weak-strong steady-state microbunching (Weak-Strong SSMB). The longitudinal beta function can vary by seven orders of magnitude along such a ring, with the minimal value squeezed to 10 nm. An example application of Weak-Strong SSMB for kW coherent EUV radiation is presented. Extension to X-ray can be anticipated. An energy-leveled electron beam enables $γ$-ray frequency comb production. The ideas can be scaled to wavelengths like RF and THz, for bunch length and energy spread control, ultrashort X-ray and coherent THz generation. Our work establishes a new paradigm for longitudinal dynamics study, accelerator light source development, and opens great potential for accelerator physics and technology.
Comments22 pages, 6 figures, 1 table
