Nijhof D F J, de Raadt T C H, Huijts J V, Franssen J G H, Mutsaers P H A, Luiten O J
Department of Applied Physics and Science Education, Coherence and Quantum Technology Group, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
Doctor X Works BV, 5616 JC Eindhoven, The Netherlands.
Struct Dyn. 2023 Oct 3;10(5):054303. doi: 10.1063/4.0000200. eCollection 2023 Sep.
The ultrafast and ultracold electron source, based on laser cooling and trapping of atomic gas and its subsequent near-threshold two-step photoionization, is capable of generating electron bunches with a high transverse brightness at energies of roughly 10 keV. This paper investigates the possibility of increasing the range of applications of this source by accelerating the bunch using radio frequency electromagnetic fields. Bunch energies up to 35 keV are measured by analyzing the diffraction patterns generated from a mono-crystalline gold sample. It is found that the normalized transverse emittance is largely preserved during acceleration.
基于对原子气体的激光冷却与俘获及其随后的近阈值两步光电离的超快超冷电子源，能够在大约10 keV的能量下产生具有高横向亮度的电子束团。本文研究了通过利用射频电磁场加速束团来扩大该源应用范围的可能性。通过分析单晶金样品产生的衍射图样，测量了高达35 keV的束团能量。研究发现，归一化横向发射度在加速过程中基本保持不变。
