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研究了超短脉冲强激光在等离子体通道中传播时产生的自生磁场．利用相对论动量方程和泊松方程及安培定律得出自生磁场的一个基本公式，在此基础上解析并数值研究了通道中产生的自生磁场的特性和结构，初步探讨了超短脉冲强激光在等离子体中传播时形成的排空效应对自生磁场的影响，并分析了产生自生磁场的机制
The spontaneous magnetic field generated when the ultrashort pulse laser propagates in the plasma channel is studied. Using the theory of relativistic momentum, the Poisson equation and the Ampere’s law, a fundamental formula of the self-generated magnetic field is derived. Based on this, the properties and structure of the self-generated magnetic field in the channel are analyzed and numerically studied. In the dissemination of the formation of the emptying effect on the self-generated magnetic field, and analyzed the mechanism of self-generating magnetic field