%0 Journal Article
%T Study of transport of hot electrons in solid targets using transition radiation<br>利用渡越辐射研究超热电子在固体靶中的输运过程
%A Wang Guang-Chang
%A Zheng Zhi-Jian
%A Gu Yu-Qiu
%A Chen Tao
%A Zhang Ting
%A <br>王光昶
%A 郑志坚
%A 谷渝秋
%A 陈涛
%A 张婷
%J 物理学报
%D 2007
%I 
%X For studing the transport of hot electrons in solid targets by transition radiation, the image pattern of spatial distribution and spectrum of optical emission were measured at the normal direction from the rear side of targets employing optical CCD camera and OMA optical multi-channel spectrometer on the 100 TW femtosecond laser facility.The image pattern of spatial distribution has a disc-shape, in which is distributed a bright localized signal, which shows the filament effect during hot electron transport. The spectrum of optical emission has sharp peaks near the 3 and 3/2 multiple of the fundamental frequency, corresponding to the third-order harmonic and 3/2-order harmonics, respectively, which is ascribed to the coherent transition radiation (CTR) generated by microbunches of hot electron beams produced in transport. The intensity of transition radiation decreases with the increase of target thickness.
%K hot electron
%K coherent transition radiation
%K transport
%K instability<br>超热电子
%K 相干渡越辐射
%K 输运
%K 不稳定性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=FFF6888731C284FD&yid=A732AF04DDA03BB3&vid=014B591DF029732F&iid=0B39A22176CE99FB&sid=7D89C25BE291E00C&eid=54D3D9B69F1CCE77&journal_id=1000-3290&journal_name=物理学报&referenced_num=6&reference_num=15