We study theoretically the possibilities of double-stage energy recuperation in a double-beam terahertz gyrotron. Numerical modeling, which was performed for a gyrotron producing radiation with a frequency of 0.78 THz and operating at the second cyclotron-frequency harmonic at the TE8.5 mode, demonstrates the possibility of spatial and energy separation of electron beams. This makes it possible to implement a double-stage recuperation scheme. The found energy spectra of electrons suggest an increase in the gyrotron efficiency by 3.5–4 times.

中文翻译：

---

电子束的能谱和双束太赫兹回旋管双级能量回收的可能性

我们从理论上研究了双光束太赫兹陀螺仪双级能量回收的可能性。对产生频率为 0.78 THz 的辐射并在 TE8.5 模式下以第二回旋频率谐波运行的回旋管进行的数值模拟证明了电子束空间和能量分离的可能性。这使得实施双阶段恢复计划成为可能。发现的电子能谱表明回旋管效率提高了 3.5-4 倍。