The ion channel free-electron laser with varying betatron amplitude
The ion channel free-electron laser with varying betatron amplitude
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DOI：
10.1088/1367-2630/16/9/093025
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发表时间：
2014-09-22
影响因子：
3.3
通讯作者：
Jaroszynski, D. A.
中科院分区：
文献类型：
--
作者：
Ersfeld, B.;Bonifacio, R.;Jaroszynski, D. A.
离子通道激光器（ICL）是自由电子激光器（FEL）的超紧凑版本，其中波荡器被离子通道取代。以前的ICL研究假设的横向动量振幅是不切实际的小实验。在这里，我们表明，这种限制可以被删除，正确地考虑到振荡和发射场之间的共振的依赖性的感应加速器的振幅，这必须被视为变量。ICL模型与此基本除了使用众所周知的形式主义的自由电子激光。分析所得到的缩放方程显示了一个现实的前景，建立一个紧凑的ICL源的基本波长下降到紫外线，谐波可能延伸到X射线。增益参数ρ可以达到高达0.03的值，这允许驱动ICL与电子束团与现实的发射度。
The ion-channel laser (ICL) is an ultra-compact version of the free-electron laser (FEL), with the undulator replaced by an ion channel. Previous studies of the ICL assumed transverse momentum amplitudes which were unrealistically small for experiments. Here we show that this restriction can be removed by correctly taking into account the dependence of the resonance between oscillations and emitted field on the betatron amplitude, which must be treated as variable. The ICL model with this essential addition is described using the well-known formalism for the FEL. Analysis of the resulting scaled equations shows a realistic prospect of building a compact ICL source for fundamental wavelengths down to UV, and harmonics potentially extending to x-rays. The gain parameter rho can attain values as high as 0.03, which permits driving an ICL with electron bunches with realistic emittance.