发表机构
Peking University; Institute of Guangdong Laser Plasma Technology（北京大学; 广东激光等离子体技术研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究提出通过薄片交叉形成宽度小于10纳米的准粒子，在激光场中振荡产生超辐射，将广义超辐射从切连科夫机制扩展到同步辐射机制，实现10-100纳米吉瓦级啁啾辐射，兼容现有汤姆孙散射设施。
AI 中文摘要
最近提出的广义超辐射（GS）概念允许在不需复杂压缩或预聚束相对论电子的情况下产生相干辐射。然而，当前GS方案中的准粒子是通过局部电子积累形成的，其尺寸超过100纳米，限制了可实现的辐射波长。在本研究中，我们展示了通过薄片交叉实现宽度小于10纳米的窄准粒子。当能量啁啾电子束与强激光脉冲碰撞时，前端的低能电子向后滑动，形成一个加速准粒子。这些准粒子在激光场中经历横向振荡，从而将GS发射从切连科夫机制扩展到同步辐射机制。三维粒子模拟表明，在10-100纳米范围内可产生吉瓦级啁啾辐射。所提出的方案与现有汤姆孙散射设施兼容，为产生相干超快辐射铺平了道路。
英文摘要
The recently proposed concept of generalized superradiance (GS) allows for the generation of coherent radiation without the need for complex compression or prebunching of relativistic electrons. However, the quasiparticles in current GS schemes are formed through local electron accumulation and their sizes exceed 100 nm, restricting the achievable radiation wavelength. In this study, we demonstrate a realization of narrow quasiparticles with <10 nm widths through sheet-crossing. When an energy chirped electron beam collides with an intense laser pulse, lower energy electrons at the front slip back, forming an accelerating quasiparticle. These quasiparticles undergo transverse oscillations within the laser field, thereby extending GS emission from the Cherenkov regime into the synchrotron regime. Three-dimensional particle-in-cell simulations indicate the production of gigawatt-class chirped radiation in the 10-100 nm range. The proposed scheme is compatible with existing Thomson scattering facilities, paving the way for the generation of coherent ultrafast radiation.
Comments14 pages, 5 figures
