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arXiv physics/0211105physics.plasm-phphysics.comp-ph
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三维相对论电磁子周期孤子

Three Dimensional Relativistic Electromagnetic Sub-cycle Solitons

Timur Esirkepov, Katsunobu Nishihara, Sergei V. Bulanov, Francesco Pegoraro

摘要:

利用三维Particle-in-Cell方法模拟了强激光脉冲在欠密等离子体中的传输,观察到了三维相对论电磁子周期孤子。它们的结构类似于具有极向电场和环形磁场的振荡电偶极子,其与电子密度同相振荡,频率低于朗缪尔频率。在离子时间尺度上,孤子的核发生库仑爆炸,导致离子加速,然后演化成一个缓慢膨胀的准中性腔。

英文摘要:

Three dimensional (3D) relativistic electromagnetic sub-cycle solitons were observed in 3D Particle-in-Cell simulations of an intense short laser pulse propagation in an underdense plasma. Their structure resembles that of an oscillating electric dipole with a poloidal electric field and a toroidal magnetic field that oscillate in-phase with the electron density with frequency below the Langmuir frequency. On the ion time scale the soliton undergoes a Coulomb explosion of its core, resulting in ion acceleration, and then evolves into a slowly expanding quasi-neutral cavity.

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