Self-Organized Kilotesla Magnetic-Tube Array in an Expanding Spherical Plasma Irradiated by kHz Femtosecond Laser Pulses

作     者：Shiyi Zhou Yafeng Bai Ye Tian Haiyi Sun Lihua Cao Jiansheng Liu 

作者机构：State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 People’s Republic of China University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China Institute of Applied Physics and Computational Mathematics Beijing 100088 People’s Republic of China IFSA Collaborative Innovation Center Shanghai Jiao Tong University Shanghai 200240 People’s Republic of China Department of Physics Shanghai Normal University Shanghai 200234 People’s Republic of China Institute of Modern Optics Nankai University Tianjin 300000 People’s Republic of China 

出 版 物：《Physical Review Letters》 (物理评论快报)

年 卷 期：2018年第121卷第25期

页      面：255002-255002页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Key Laboratory for Laser Plasmas National Natural Science Foundation of China, NSFC, (11425418, 61521093) Ministry of Education of the People's Republic of China, MOE Ministry of Science and Technology of the People's Republic of China, MOST Shanghai Jiao Tong University, SJTU National Key Laboratory of Shockwave and Detonation Physics, LSD Shanghai Rising-Star Program, (XDB16) Science and Technology on Plasma Physics Laboratory, China Academy of Engineering Physics 

主　　题：Laser-plasma interactions Magnetic field generation & plasma dynamo Plasma instabilities Weibel instability Femtosecond laser irradiation 

摘      要：By using a millijoule kHz femtosecond laser pulse to irradiate a preformed expanding spherical plasma, which is driven by a prepulse with intensity of 1×1014 W/cm2, we observe fast-electron-mediated filamentary structures and an accompanying self-organized magnetic-tube array with 2000 T via time-resolved magneto-optical polarization rotation measurements. We reveal that these periodical filamentary structures predominantly originate from ejected energetic electron flows from the inner denser region of the spherical plasma, which will induce the electron Weibel instability and magnetic field organization and amplification in the expanding plasma in 2 ps. These results open new paths to investigate amplification of intense magnetic fields and the radiation signature from gamma-ray bursts just by means of a much smaller and robust experimental platform.