Observation of fine structures in laser-driven electron beams using coherent transition radiation.
Observation of fine structures in laser-driven electron beams using coherent transition radiation.
复制标题
使用相干跃迁辐射观察激光驱动电子束中的精细结构。
DOI：
10.1103/physrevlett.98.194801
复制
发表时间：
2007
影响因子：
8.6
通讯作者：
V. Malka
中科院分区：
文献类型：
--
作者：
Y. Glinec;J. Faure;A. Norlin;A. Pukhov;V. Malka
我们测量了激光-等离子体相互作用中电子束的相干光跃迁辐射。辐射光谱的测量揭示了电子束在400-1000 nm范围内的精细结构。这些结构是使用从一个3D粒子在细胞模拟的电子分布再现，并归因于微聚束的电子束，由于其与激光场的相互作用。当辐射器被放置在更靠近相互作用点时，光谱振荡也被记录下来，这是由两个电子聚束延迟74 fs产生的辐射干涉的特征。第二电子聚束持续时间被示出为超短的，以匹配辐射的强度水平。而过渡辐射是在较长的波长，以估计电子束团的长度，这项研究的重点是超短结构的电子束。
We have measured the coherent optical transition radiation emitted by an electron beam from laser-plasma interaction. The measurement of the spectrum of the radiation reveals fine structures of the electron beam in the range 400-1000 nm. These structures are reproduced using an electron distribution from a 3D particle-in-cell simulation and are attributed to microbunching of the electron bunch due to its interaction with the laser field. When the radiator is placed closer to the interaction point, spectral oscillations have also been recorded, signature of the interference of the radiation produced by two electron bunches delayed by 74 fs. The second electron bunch duration is shown to be ultrashort to match the intensity level of the radiation. Whereas transition radiation was used at longer wavelengths in order to estimate the electron bunch length, this study focuses on the ultrashort structures of the electron beam.
影响因子：
64.8
作者：
Faure, J;Glinec, Y;Malka, V
通讯作者：
Malka, V