We propose a short period undulator based on the electromagnetic field pattern in a THz-driven split ring resonator structure. An analytical model is developed that allows us to assess the key performance parameters of the undulator and to estimate the emitted radiation spectrum. Different geometric configurations are compared in detail using numerical simulations. A 100 MeV electron bunch with 5 pC charge is shown to emit narrow band 83 eV photon pulses with a peak brightness of approximately ${10}^{19}\mathrm{photons}/(\mathrm{s}{\mathrm{mrad}}^2{\mathrm{mm}}^{2}0.1\%\mathrm{BW})$ when passing through the 100 mm long undulator with a 1 mm period.

中文翻译：

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太赫兹驱动的裂环谐振器波荡器

我们提出了一种基于THz驱动的裂环谐振器结构中的电磁场模式的短周期波动器。开发了一个分析模型，使我们能够评估波动器的关键性能参数并估算发射的辐射光谱。使用数值模拟详细比较了不同的几何形状。示出了具有5 pC电荷的100 MeV电子束发射窄带83 eV光子脉冲，其峰值亮度约为${10}^{19}\mathrm{光子}/（\mathrm{s}{\mathrm{姆拉德}}^2{\mathrm{毫米}}^{2}0.1％\mathrm{体重}）$ 当以1毫米的周期穿过100毫米长的起伏器时。