Ion-ripple laser.
Ion-ripple laser.
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DOI：
10.1103/physrevlett.68.29
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发表时间：
1992-01
影响因子：
8.6
通讯作者：
Chen;Dawson
中科院分区：
文献类型：
--
作者：
Chen;Dawson
我们提出了一种新的方案，离子纹波激光器，用于产生从微波到紫外线的可调谐相干辐射。相对论性电子束斜向通过离子波纹传播激发电磁辐射，电磁辐射通过反向拉曼散射与负能量静电波耦合。辐射峰值的共振频率为{omega}{类似于}2{gamma}{sup 2}{kappa}{sub {ital i}{ital r}c} cos{theta}。导出了波耦合的流体理论色散关系，并估计了非线性饱和水平。利用1 2/2维PIC仿真程序对理论和标度规律进行了验证。
We present a new scheme, the ion-ripple laser, for generating tunable coherent radiation ranging from microwaves to the ultraviolet. A relativistic electron beam obliquely propagating through an ion ripple excites electromagnetic radiation which is coupled to a negative-energy electrostatic wave via backward Raman scattering. The radiation peaks at a resonance frequency of {omega}{similar to}2{gamma}{sup 2}{kappa}{sub {ital i}{ital r}c} cos{theta}. We derive the fluid theory dispersion relation for wave coupling and estimate the nonlinear saturation level. A 1 2/2 D PIC simulation code is used to verify the theory and scaling laws.