PROPAGATION AND GUIDING OF INTENSE LASER-PULSES IN PLASMAS
PROPAGATION AND GUIDING OF INTENSE LASER-PULSES IN PLASMAS
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DOI：
10.1103/physrevlett.69.2200
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发表时间：
1992-10-12
影响因子：
8.6
通讯作者：
JOYCE, G
中科院分区：
文献类型：
--
作者：
SPRANGLE, P;ESAREY, E;JOYCE, G
建立了描述强激光脉冲在等离子体中传输的二维轴对称相对论流体模型，并进行了数值计算。相对论导光不能有效地防止短激光脉冲的衍射扩展，而长脉冲由于相对论效应和尾迹场效应而被调制。通过使用预先形成的等离子体密度通道或通过定制脉冲轮廓，激光脉冲可以在许多瑞利长度上传播。激光脉冲的背后可以产生超高的轴向电场。
A two-dimensional, axisymmetric, relativistic fluid model describing the propagation of intense laser pulses in plasmas is formulated and numerically evaluated. Relativistic guiding is ineffective in preventing the diffractive spreading of short laser pulses and long pulses become modulated due to relativistic and wake-field effects. Laser pulses can be propagated over many Rayleigh lengths by use of a preformed plasma density channel or by tailoring the pulse profile. Ultrahigh axial electric fields can be generated behind the laser pulse.