OBSERVATION OF COHERENT TRANSITION RADIATION
OBSERVATION OF COHERENT TRANSITION RADIATION
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DOI：
10.1103/physrevlett.67.2962
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发表时间：
1991-11-18
影响因子：
8.6
通讯作者：
BLUM, EB
中科院分区：
文献类型：
--
作者：
HAPPEK, U;SIEVERS, AJ;BLUM, EB
毫米长的电子束穿过薄金属箔时产生的相干跃迁辐射已在远红外区域被观察到。将该强度与将 SF6 气体引入电子路径时产生的较小量的切伦科夫辐射进行比较。通过改变电子束附近金属室的几何形状来排除尾流场辐射。测量了跃迁辐射的强度、偏振、光谱和角度分布，并确定了其相干性质。
Coherent transition radiation, generated by the passage of mm-long bunches of electrons through a thin metal foil, has been observed in the far infrared. The intensity was compared to the smaller amount of Cherenkov radiation produced when SF6 gas was introduced into the electron path. Wake-field radiation was ruled out by varying the geometry of the metal chamber near the electron beam. The intensity, the polarization, and the spectral and angular distribution of the transition radiation were measured and its coherent nature was identified.