Generation of 10 kT axial magnetic fields using multiple conventional laser beams:A sensitivity study for kJ PW-class laser facilities  

作　　者：Jue Xuan Hao Xiang Tang Alexey Arefiev Robert J.Kingham Ping Zhu Yin Shi Jian Zheng 

机构地区：[1]Department of Plasma Physics and Fusion Engineering,University of Science and Technology of China,Hefei 230026,China [2]Department of Mechanical and Aerospace Engineering,University of California at San Diego,La Jolla,California 92093,USA [3]Blackett Laboratory,Imperial College London,London SW72AZ,United Kingdom [4]National Laboratory on High Power Laser and Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China [5]Collaborative Innovation Center of IFSA(CICIFSA),Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Matter and Radiation at Extremes》2025年第1期15-32,共18页极端条件下的物质与辐射(英文)

基　　金：support by the National Natural Science Foundation of China(Grant No.12322513);USTC Research Funds of the Double First-Class Initiative;CAS Project for Young Scientists in Basic Research(Grant No.YSBR060);supported by the Office of Fusion Energy Sciences under Award No.DE-SC0023423。

摘　　要：Strong multi-kilotesla magnetic fields have various applications in high-energy density science and laboratory astrophysics, but they are not readily available. In our previous work [Y. Shi et al., Phys. Rev. Lett. 130, 155101(2023)], we developed a novel approach for generating such fields using multiple conventional laser beams with a twist in the pointing direction. This method is particularly well-suited for multi-kilojoule petawatt-class laser systems like SG-Ⅱ UP, which are designed with multiple linearly polarized beamlets. Utilizing three-dimensional kinetic particle-in-cell simulations, we examine critical factors for a proof-of-principle experiment, such as laser polarization, relative pulse delay,phase offset, pointing stability, and target configuration, and their impact on magnetic field generation. Our general conclusion is that the approach is very robust and can be realized under a wide range of laser parameters and plasma conditions. We also provide an in-depth analysis of the axial magnetic field configuration, azimuthal electron current, and electron and ion orbital angular momentum densities.Supported by a simple model, our analysis shows that the axial magnetic field decays owing to the expansion of hot electrons.

关 键 词：POLARIZATION MAGNETIC AXIAL 

分 类 号：TN249[电子电信—物理电子学]