高强度Laser -固体相互作用中背侧光发射确定的100 - 100倍快电子成丝和再循环
Micron-scale Fast Electron Filamentation and Recirculation determined from Rear Side Optical Emission in High Intensity Laser-Solid Interactions
摘要：
通过测量固体靶后表面的光辐射，研究了拍瓦级激光与固体靶相互作用中产生的相对论电子的输运。发射的高偏振度表明它主要是光学跃迁辐射。围绕发射主区域的晕也被极化，这归因于电子再循环的效应。跃迁辐射的振幅随观察角度的变化为{ $μ$ m-尺寸}细丝的存在提供了证据。
英文摘要：
The transport of relativistic electrons generated in the interaction of petawatt class lasers with solid targets has been studied through measurements of the optical emission from their rear surface. The high degree of polarization of the emission indicates that it is predominantly optical transition radiation. A halo that surrounds the main region of emission is also polarized, and is attributed to the effect of electron recirculation. The variation of the amplitude of the transition radiation with respect to observation angle provides evidence for the presence of {$μ$m-size} filaments.
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