凹面目标渡越辐射和衍射辐射的聚焦
Focusing of transition radiation and diffraction radiation from concave targets
摘要：
本文研究了考虑前波区效应的相对论电荷通过有限半径抛物面靶的渡越辐射。它示出，在这种情况下的辐射锥变窄发生在对比与过渡辐射从平坦的目标，如果检测器位于的距离，这是小于从目标的焦距（聚焦效果）。在带电粒子穿过抛物面靶中心孔时，也会发生衍射辐射聚焦。提出了利用相干DR聚焦技术对电子束团长度进行无损伤测量的方法。
英文摘要：
In the article the transition radiation from a relativistic charge crossing a finite radius paraboloid target with taking into account the pre-wave zone effect is considered. It is shown that in this case the radiation cone narrowing occurs in contrast with the transition radiation from the flat target if the detector is situated at the distance, which is smaller than the focus distance (the focusing effect) from the target. At the charged particle passage through the central hole in a paraboloid target the diffraction radiation focusing (DR) occurs too. The focusing of coherent DR for the non-invasive measuring of the electron bunch length is proposed.
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