Deducing the Electron-Beam Diameter in a Laser-Plasma Accelerator Using X-Ray Betatron Radiation
Deducing the Electron-Beam Diameter in a Laser-Plasma Accelerator Using X-Ray Betatron Radiation
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DOI：
10.1103/physrevlett.108.075001
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发表时间：
2012-02-13
影响因子：
8.6
通讯作者：
Spielmann, Christian
中科院分区：
文献类型：
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作者：
Schnell, Michael;Saevert, Alexander;Spielmann, Christian
我们研究了激光-等离子体电子加速器作为keV X射线辐射亮源的特性。在相互作用过程中，电子经历了电子的电子振荡，从仔细测量的X射线谱可以推断出电子的振荡幅度，其幅度随着电子能量的增加而减小。根据振荡幅度和独立测量的(1.8+/-0.3)微米的X射线源尺寸，我们可以估算出电子束团直径为(1.6+/-0.3)微米。
We investigate the properties of a laser-plasma electron accelerator as a bright source of keV x-ray radiation. During the interaction, the electrons undergo betatron oscillations and from the carefully measured x-ray spectrum the oscillation amplitude of the electrons can be deduced which decreases with increasing electron energies. From the oscillation amplitude and the independently measured x-ray source size of (1.8 +/- 0.3) mu m we are able to estimate the electron bunch diameter to be (1.6 +/- 0.3) mu m.