The numerical results show that the threshold current depends on the skin depth of the waveguide wall, the magnetic field detuning and the perpendicular-to-parallel velocity ratio of the electrons.

• 研究结果表明：绝对不稳定性起振电流与损耗波导的集肤深度有关，选择有较大的集肤深度的损耗波导可以提高绝对不稳定性起振电流；