西北师范大学学报（自然科学版）2018，Vol.54Issue(3)：33-39,46,8.DOI:10.16783/j.cnki.nwnuz.2018.03.007
强激光在非均匀磁化电子-正电子-离子等离子体中的传播
Intense laser propagation in an inhomogeneous magnetized electron-positron-ion plasma
摘要
Abstract
Based on the relativistic two-fluid model,the nonlinear interaction of left-hand circularly polarized wave in an inhomogeneous magnetized electron-positron-ion(EPI)plasma is investigated. Considering the relativistic and the ponderomotive effects,the governing equations of the system can be reduced to a modified nonlinear Schr?dinger equation,in w hich the magnetic field and the density inhomogeneous effects are included.From the modified nonlinear Schr?dinger equation,the modulation instability of the system are obtained theoretically.Numerical results also show that the laser beam focusing and filamentation of the system can be enhanced with the strength of the external magnetic field, the density ratio of the positron to the electron and the inhomogeneity of the plasma density,w hich leads to the strong modulational and filamentational instabilities,and rich nonlinear phenomena are emerged.关键词
电子-正电子-离子等离子体/非线性薛定谔方程/调制不稳定性/非线性现象Key words
electron-positron-ion plasma/nonlinear Schrödinger equation/modulational instability/nonlinear phenomena分类
数理科学引用本文复制引用
洪学仁,景敏,石玉仁,成丽红..强激光在非均匀磁化电子-正电子-离子等离子体中的传播[J].西北师范大学学报（自然科学版）,2018,54(3):33-39,46,8.基金项目
国家自然科学基金资助项目(11365020,11565021) （11365020,11565021）
西北师范大学青年教师科研能力提升计划资助项目(NWNU-LKQN-16-3) （NWNU-LKQN-16-3）
