Effects of target pre-heating and expansion on terahertz radiation production from intense laser-solid interactions

作     者：X.H.Yuan Y.Fang D.C.Carroll D.A.MacLellan F.Du N.Booth M.Burza M.Chen R.J.Gray Y.F.Jin Y.T.Li Y.Liu D.Neely H.Powell G.Scott C.-G.Wahlstrm J.Zhang P.McKenna Z.M.Sheng 

作者机构：Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy Shanghai Jiao Tong University Beijing National Laboratory of Condensed Matter Physics Institute of Physics Chinese Academy of Sciences SUPA Department of Physics University of Strathclyde Central Laser Facility Rutherford Appleton Laboratory Department of Physics Lund University 

出 版 物：《High Power Laser Science and Engineering》 (高功率激光科学与工程（英文版）)

年 卷 期：2014年第2卷第1期

页      面：13-17页

核心收录：

学科分类：0808[工学-电气工程] 080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0807[工学-动力工程及工程热物理] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0827[工学-核科学与技术] 0703[理学-化学] 0803[工学-光学工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by National Basic Research Program of China (grant nos. 2013CBA01500 and 2014CB339801) National Natural Science Foundation of China (grant nos. 11121504, 11205100, 11220101002 and 11135012) the EPSRC (grant nos. EP/J003832/1 and EP/L001357/1) the Swedish Research Council 

主　　题：target heating terahertz radiation 

摘      要：The first experimental measurements of intense(～7 × 1019 W cm-2) laser-driven terahertz(THz) radiation from a solid target which is preheated by an intense pulse of laser-accelerated protons is reported. The total energy of the THz radiation is found to decrease by approximately a factor of 2 compared to a cold target reference. This is attributed to an increase in the scale length of the preformed plasma, driven by proton heating, at the front surface of the target,where the THz radiation is generated. The results show the importance of controlling the preplasma scale length for THz production.