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将圆柱形阳极层霍尔推力器的环形阳极分成独立两段,通过观测两个独立阳极段之间的电势差信号以及每个独立阳极段上的电信号来探究阳极上的电流振荡情况。结果表明:放电电压的提高加速了阳极段的电流振荡频率,并且提高电流振荡的振幅,随着放电电压的增大,振幅的大小不会一直增大,最终会到达一个饱和值。阳极段上电流振荡幅度较大,因此抑制这种振荡起伏对提高推力器的稳定性具有重大意义。
The annular anode of a cylindrical anode Hall thruster is divided into two independent sections and the current oscillation on the anode is explored by observing the potential difference signal between two independent anode segments and the electrical signal on each individual anode segment. The results show that the increase of discharge voltage accelerates the current oscillation frequency of the anode segment and increases the amplitude of the current oscillation. As the discharge voltage increases, the amplitude does not increase all the time and eventually reaches a saturation value. Anode current oscillation amplitude larger, so to suppress this oscillation undulation to improve the stability of the thruster is of great significance.