Design of uniform permanent magnet electronic optical system for 220 GHz sheet electron beam traveling wave tube
Design of uniform permanent magnet electronic optical system for 220 GHz sheet electron beam traveling wave tube
复制标题
220 GHz片状电子束行波管均匀永磁电子光学系统设计
DOI：
10.1038/s41598-020-70016-y
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发表时间：
2020-08-13
影响因子：
4.6
通讯作者：
Wang, Meng
中科院分区：
文献类型：
--
作者：
Liu, Wenxin;Guo, Jiaqi;Wang, Meng
片状电子束具有低电流密度和大电流的特点，在毫米波和太赫兹真空电子器件领域具有极大的吸引力。设计了一种用于220 GHz行波管的均匀永磁体(UPM)电子光学系统(EOS)，其中SEB的电压和电流分别为17KV和0.3A。为了获得稳定的高传输速率EOS，研究了UPM EOS中SEB的特性，包括发射度、轨道角和束流轨迹，并通过CST模拟对其进行了讨论。结果表明，x向发射率在0.003~0.016 mm之间变化，垂直方向发射率在1×10−4~3×10−4 mm之间变化，传输过程中发射率保持在2.5m×10~10−4 mm以下，保证了发射方向的稳定性。对于完全状态方程的设计，采用了常规矩形集热器，其中SEB是均匀散射的。
The sheet electron beam (SEB), for which is the low current density and large current, is highly attractive in the region of millimeter wave and terahertz vacuum electronic devices (VEDs). A uniform permanent magnet (UPM) electronic optical system (EOS) driven by a SEB for 220 GHz traveling wave tube (TWT) is designed in present work, in which the voltage and current for SEB is 17 kV and 0.3 A, respectively. For obtaining the stable high transmission rate EOS, the characteristics of SEB in UPM EOS are studied, including the emittance, orbital angle, and beam trajectories, which are discussed through the CST simulation. The results show that the emittances in thex-direction are varied from 0.003 to 0.016 mm rad and iny-direction are various from 1 × 10−4to 3 × 10−4mm rad, respectively, keeping below than 2.5 × 10−4mm rad during transmission, which guarantees the stability of SEB iny-direction. For the design of complete EOS, the normal rectangular collector is used, in which the SEB is uniformed scattering.