一种激光驱动的超短X射线光源

  • 摘要: 介绍一种可产生超短脉冲的新型X射线光源。它由多碱光电阴极、金靶及铍输出窗组成。当该X射线管的阴极受到强光照射时,产生光电子发射,并经电场加速后轰击金靶,产生连续谱的X射线轫致辐射,经铍窗输出。用超短的可见光脉冲驱动该光源,并借助X射线扫描相机测量了该管的X射线输出,获得了5ps的X射线脉冲。这种光源可方便地用来标定X射线扫描相机的时间分辨率,此种产生超短电子脉冲的方法也可在其他方面获得应用。

     

    Abstract: A new methodto generate ultrashort  Xray pulse has been presented. The main  point of this method is to bombard a heavy  metal target with an ultrashort electron  beam. On the basis of the ideal a new  pulsed soft Xray diode with multialkali  photocathode and gold target deposited on  a Be output window has been developed.  With the aid of an ultrashort visible  light pulse produced by stimulated  Ra?

     

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