Low Emittance, High Brilliance Relativistic Electron Beams from a Laser-Plasma Accelerator
Low Emittance, High Brilliance Relativistic Electron Beams from a Laser-Plasma Accelerator
复制标题
DOI：
10.1103/physrevlett.105.215007
复制
发表时间：
2010-11-19
影响因子：
8.6
通讯作者：
Jaroszynski, D. A.
中科院分区：
文献类型：
--
作者：
Brunetti, E.;Shanks, R. P.;Jaroszynski, D. A.
激光韦克菲尔德加速器的发展表明其适合作为紧凑型自由电子激光器的驱动器。高亮度由归一化的横向发射度定义，对于X射线自由电子激光，其应小于1 π mm mrad。我们报告的高分辨率测量发射度的125兆电子伏，单能光束从韦克菲尔德加速器。低至1.1 +/- 0.1 π mm mrad的发射度使用胡椒罐掩模测量。这设置了发射度的上限，这与传统的线性加速器相当。峰值横向亮度为5 × 10（15）Am-1 rad（-1），使其适用于紧凑型XUV自由电子激光。
Progress in laser wakefield accelerators indicates their suitability as a driver of compact free-electron lasers (FELs). High brightness is defined by the normalized transverse emittance, which should be less than 1 pi mm mrad for an x-ray FEL. We report high-resolution measurements of the emittance of 125 MeV, monoenergetic beams from a wakefield accelerator. An emittance as low as 1.1 +/- 0.1 pi mm mrad is measured using a pepper-pot mask. This sets an upper limit on the emittance, which is comparable with conventional linear accelerators. A peak transverse brightness of 5 x 10(15) Am-1 rad(-1) makes it suitable for compact XUV FELs.