多通道沿面放电电学特性研究  

Electrical Characteristics Study on Multichannel Surface Discharge

作　　者：易爱平[1] 刘晶儒[1] 于力[1] 张亚洲[2] 马莲英[1] 张永生[1] 

机构地区：[1]西北核技术研究所,西安710024 [2]国防科技大学理学院,长沙410073

出　　处：《高电压技术》2007年第4期10-13,共4页High Voltage Engineering

摘　　要：介绍了一种多通道沿面放电光泵浦源,以聚四氟乙烯做绝缘基板,面积约10cm×10cm,其上均匀布置10对放电电极及对应的放电通道。在理论分析了泵浦源的触发特性后利用幅值25～40kV、上升时间约10ns的触发信号获得了多通道放电抖动<10ns的10通道均匀放电,实验研究了该泵浦源在多通道沿面放电下放电通道的电阻、电感及能量沉积效率等参数随储能、气体介质压强及放电通道数等实验条件的变化规律。当氮氩混合气体总气压0.1MPa(氮氩比例为3:7)、泵浦源储能电容0.5μF、充电电压20kV时,通道能量沉积效率约94%。实验结果表明:装置储能越小、介质气压越高、放电通道数越多,放电通道的电阻就越大、能量沉积效率越高。The multichannel surface discharge applied for optical pumping XeF（C-A） laser has the advantages of high energy deposited efficiency , capability for large area uniform discharge , large active volume and uniform gain. The characteristics of pumping source are studied by developing a multichannel surface discharge model in this paper. The design of a pumping source with multichannel surface discharge is introduced, and the trigger principle is analyzed theoretically. The electric field at two electrodes of channel is intensely deformed, and it is nearly zero at the middle of channels by the action of trigger voltage. The system of parameter diagnostic and measurement is set up. The jitter of 10 channels discharge about 20ns and uniform discharge is obtained on the conditions of the charging voltage -20kV, the trigger voltage of 30kV with the risetime about 10ns, and the pressure of 0. 1MPa in the case of V（N2 ） ：V（Ar） = 3：7. The electrical parameters of channel resistor, inductance, and deposited energy efficiency of the pumping source as a function of stored energy, gas pressure, and channel number are studied experimentally by measuring discharge current with Rogowski coils. The experimental results indicate that the smaller the stored energy, the higher gas pressure, and the more channel number, the more channel resistor, inductance, and efficiency of the pumping source. The deposited efficiency of 94% is obtained with the capacitor of 0. 5μF, the charging voltage of -20kV, and the pressure of 0. 1MPa in the case of V（N2 ） ：V（Ar）=3：7.

关 键 词：光泵浦源 多通道沿面放电 XEF(C-A)激光 触发 通道电阻 能量沉积效率 

分 类 号：TM85[电气工程—高电压与绝缘技术]