Discharge-Coupled-Vibration of Pin Electrode in Pin-to-Plate System

当针电极支撑轴向刚度较低时，在针-板气体放电系统中观察到一些奇异动力现象。一是由于流光电晕引起的暗放电和正电晕放电过渡时，垂直于板电极的引脚电极的振动。由于负电晕的不稳定性，在负电晕放电中也观察到类似的振动。这两种振动都是离子风在电晕放电时产生的脉动或波动静电力所引起的强迫振动。在软支撑针电极火花放电时观察到另一种轴向振动。振动与火花放电的发生是耦合的。对火花放电时作用在引脚电极上的力进行了隐式计算，结果表明该力具有吸引力，约为1 mN，且随着外加电压的增大而增大。虽然目前还不清楚火花放电过程中产生吸引力的原因，但这些现象有望用于新型无臭氧充电器的设计和电子照相双组分磁刷开发子系统中“头行”的基本机理的阐明。

Some kinds of singular dynamic phenomena were observed in a pin-to-plate gas discharge system when the axial stiffness of a support of the pin electrode was low. One was vibration of the pin electrode perpendicular to the plate electrode observed at the transition from the dark discharge and the positive corona discharge due to the streamer corona. Similar vibration was observed in the negative corona discharge due to instability of the negative corona. Both vibrations were the forced vibration due to pulsative or fluctuating electrostatic force caused by ionic wind at corona discharging. Another axial vibration was observed at spark discharge for the softly supported pin electrode. The vibration was coupled with the occurrence of the spark discharge. The force applied to the pin electrode at the spark discharge was implicitly evaluated and it was elucidated that the force was attractive, in the order of 1 mN, and it became large in accordance with the increase of the applied voltage. Although the reason why attractive force is induced during the spark discharge is not clear so far, these phenomena are expected to be utilized for the design of a new ozone-free charger and the clarification of a fundamental mechanism of "bead-carry-out" in a two-component magnetic brush development subsystem of electrophotography.