可调谐光注入电子的受控Betatron X射线辐射
Controlled Betatron X-Ray Radiation from Tunable Optically Injected Electrons
摘要：
激光等离子体加速器中产生的Betatron X射线辐射特性与辐射源中的相对论电子的性质密切相关。虽然在相互作用制度探索以前的来源是由性质不稳定的，电子束的波动后，我们在这封信中证明的可能性，以产生X射线Betatron辐射与控制和可重复的功能，允许其性能的精细研究。为此，Betatron辐射使用来自具有碰撞脉冲注入的激光等离子体加速器的具有可调能量的单能电子产生[J.Faure等人，Nature（London）444，737（2006）]。所提出的研究提供了电子和X射线之间的相关性的证据，所获得的结果打开显着的前景走向生产一个稳定的和受控的飞秒Betatron X射线源在千电子伏范围内。
英文摘要：
The features of Betatron x-ray emission produced in a laser-plasma accelerator are closely linked to the properties of the relativistic electrons which are at the origin of the radiation. While in interaction regimes explored previously the source was by nature unstable, following the fluctuations of the electron beam, we demonstrate in this Letter the possibility to generate x-ray Betatron radiation with controlled and reproducible features, allowing fine studies of its properties. To do so, Betatron radiation is produced using monoenergetic electrons with tunable energies from a laser-plasma accelerator with colliding pulse injection [J. Faure et al., Nature (London) 444, 737 (2006)]. The presented study provides evidence of the correlations between electrons and x-rays, and the obtained results open significant perspectives toward the production of a stable and controlled femtosecond Betatron x-ray source in the keV range.
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