A gas-discharge magnetically insulated vircator containing two tubes, one of which is filled with low-pressure gas is proposed. Its particle-in-cell (PIC)/Monte Carlo (MC) simulation is carried out. The dynamics of free electrons, the dynamics of the virtual cathode (VC) as a whole, and gas ionization are calculated using the example of helium. It is shown that a squeezed state of the electron beam (distributed VC) arises in a gas-filled tube, effectively ionizing gas. It is found that at a pressure of helium of the order of several Pa, the degree of its ionization can reach several percent, which can be useful in creating a joint device “vircator-laser.” A high degree of ionization leads to charge and current compensation of the electron beam in the location of the squeezed state, and the distributed VC gradually dissolves. It is replaced by the two-beam state of the beam again, and repeated microwave generation, more powerful than in the vacuum case (the power increase is more than 6 times), occurs. In this case, the peak efficiency of repeated microwave generation reaches 15%. The frequency characteristics of the gas-discharge vircator which as it turned out differ insignificantly from the characteristics of the vacuum vircator were calculated.

中文翻译：

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气体放电 Vircator：仿真结果


提出了一种包含两根管子的气体放电磁绝缘振动器，其中一根管子充满低压气体。对其进行了粒子在细胞（PIC）/蒙特卡罗（MC）模拟。以氦气为例，计算了自由电子的动力学、整个虚拟阴极 (VC) 的动力学以及气体电离。结果表明，充气管中会出现电子束压缩状态（分布式 VC），从而有效地电离气体。研究发现，在几帕量级的氦气压力下，其电离程度可以达到百分之几，这可用于制造联合装置“vircator-laser”。高度电离导致压缩态位置电子束的电荷和电流补偿，分布的VC逐渐溶解。再次被光束的两束状态所取代，并且反复产生比真空情况下更强大的微波（功率增加了6倍以上）。在这种情况下，重复微波产生的峰值效率达到15%。计算了气体放电振动器的频率特性，结果发现气体放电振动器的频率特性与真空振动器的特性没有显着差异。