Snively E C, Othman M A K, Kozina M, Ofori-Okai B K, Weathersby S P, Park S, Shen X, Wang X J, Hoffmann M C, Li R K, Nanni E A
SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
Phys Rev Lett. 2020 Feb 7;124(5):054801. doi: 10.1103/PhysRevLett.124.054801.
We present the first demonstration of THz driven bunch compression and timing stabilization of a relativistic electron beam. Quasi-single-cycle strong field THz radiation is used in a shorted parallel-plate structure to compress a few-fC beam with 2.5 MeV kinetic energy by a factor of 2.7, producing a 39 fs rms bunch length and a reduction in timing jitter by more than a factor of 2 to 31 fs rms. This THz driven technique offers a significant improvement to beam performance for applications like ultrafast electron diffraction, providing a critical step towards unprecedented timing resolution in ultrafast sciences, and other accelerator applications using femtosecond-scale electron beams.
我们首次展示了太赫兹驱动的相对论电子束团压缩和时间稳定。在短路平行板结构中使用准单周期强场太赫兹辐射，将具有2.5 MeV动能的几飞库束团压缩2.7倍，产生均方根束团长度为39 fs，并将时间抖动降低到超过2倍，降至均方根31 fs。这种太赫兹驱动技术显著改善了超快电子衍射等应用的束流性能，为超快科学中实现前所未有的时间分辨率以及使用飞秒级电子束的其他加速器应用迈出了关键一步。
