激光诱发等离子体中强磁场产生与演化机制  

Mechanism of strong magnetic field generation and evolution in laser induced plasma

作　　者：周爱华 吴静进[1] 吴馨芳[1] ZHOU Ai-hua;WU Jing-jin;WU Xin-fang(College of Science and Technology,Nanchang University,Nanchang 332020,China)

机构地区：[1]南昌大学科学技术学院,江西南昌332020

出　　处：《激光与红外》2025年第4期533-539,共7页Laser & Infrared

基　　金：江西省教育厅科学技术研究项目(No.GJ2203901)资助。

摘　　要：为充分研究激光诱发等离子体强磁场的时间演化机制,对激光诱发等离子体中强磁场产生机制展开研究。通过激光等离子相互作用机理,分析二者互相作用时,产生的多光非线性Compton散射和强磁场的入射和散射光耦合频率,得到激光诱发等离子体中强磁场的诱发机制。在诱发机制下,计算强磁场温度梯度与密度梯度在强磁场空间内分布时的磁场强度,从而得到两者在强磁场空间内分布的具体时间演化机制。具体应用实验表明:在二种机制下,通过计算离子体电流密度分量变化和电子密度分布状态,且在电流波动条件下滴值结果为0.28,具有较高的稳定性,验证了两种机制。To fully study the temporal evolution mechanism of strong magnetic fields in laser-induced plasma,the mechanism of strong magnetic field generation in laser-induced plasma is investigated.By analyzing the mechanism of laser plasma interaction,the coupling frequency of incident and scattered light generated by multi light nonlinear Compton scattering and strong magnetic field during their interaction is analyzed,and the induction mechanism of strong magnetic field in laser-induced plasma is obtained.Under the induction mechanism,the magnetic field strengths of the strong magnetic field temperature gradient and density gradient are calculated when they are distributed in the strong magnetic field space,so as to obtain the specific temporal evolution mechanism of the distribution of the two in the strong magnetic field space.Specific application experiments show that the two mechanisms are verified by calcu-lating the changes in the ion current density component and the distribution of electron density,and the entropy value results in 0.28 under the current fluctuation conditions,which has high stability.

关 键 词：等离子体 强磁场 产生机制 相互作用 激光电场 耦合频率 

分 类 号：TN249[电子电信—物理电子学] O435[机械工程—光学工程]