Coherent transition radiation in relativistic laser-solid interactions
Coherent transition radiation in relativistic laser-solid interactions
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DOI：
10.1088/0741-3335/54/3/035011
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发表时间：
2012-03-01
影响因子：
2.2
通讯作者：
Najmudin, Z.
中科院分区：
文献类型：
--
作者：
Bellei, C.;Davies, J. R.;Najmudin, Z.
研究了强激光辐照固体靶时产生的超热电子产生的相干跃迁辐射。该理论扩展到包括碰撞对所产生的热电子束的影响。碰撞效应对电子输运、晕散和离散的影响导致电子束结构的横向和纵向相干性损失，从而导致CTR效率的降低。电子的方向性导致CTR的极化的可测量的非径向分量。考虑到这些效应，这种辐射的性质可以提供有关在靶前侧产生并通过固体密度材料传输的快电子的高能尾部的有价值的信息，例如组成束的灯丝的温度、方向和尺寸。
Coherent transition radiation (CTR) produced by the hot electrons generated when solid targets are irradiated by high-intensity lasers is examined. The theory is extended to include the effects of collisions on the generated hot electron beam. The collisional effects on electron transport, blooming and straggling, leads to transverse and longitudinal loss of coherence of the electron beam structure, resulting in a decrease in efficiency in the CTR. The directionality of the electrons leads to measurable non-radial components for the polarization of the CTR. With these effects accounted for, the properties of this radiation can give valuable information on the high-energy tail of the fast electrons produced at the target front side and transported through the solid-density material, such as temperature, direction and size of the filaments composing the beam.