| 一种激光驱动的超短X射线光源 |
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| 引用本文： | 李冀,牛憨笨.一种激光驱动的超短X射线光源[J].强激光与粒子束,1998,10(2):173-176. |
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| 作者姓名： | 李冀 牛憨笨 |
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| 作者单位： | 中国科学院西安光学精密机械研究所 |
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| 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可在其他方面获得应用。
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| 关 键 词： | X射线 轫致辐射 X射线光源 激光驱动 |
AN ULTRASHORT PULSED X-RAY SOURCE DRIVEN BY LASER |
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| Abstract: | A new method to 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 Ramaan back scattering of frequency doubled mode locked YAG laser, the soft X ray pulse has been generated by this newly developed soft X ray diode and measured with our ready made soft X ray streak camera. The pulse width of 5ps has been obtained by the experiment. |
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| Keywords: | X ray production X ray tubes X ray bremsstrahlung |
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