摘要
基于脉冲功率系统磁绝缘传输线的时域仿真结果,分析了磁绝缘建立过程中不同阶段电极间的电子产生的能量损失特性;提出了造成能量损失的因素,包括损失的电子和磁绝缘的电子;给出了影响能量损失大小的因素,包括传输线的线长、半径比和加载脉冲的最大电压、电压的时间变化率等。通过分析不同脉冲功率波形作用下各传输阶段能量损失的起因、大小和影响因素,提出了依据极间的电子分布状态划分传输阶段,及对传输线的总效率分阶段计算的传输效率模型,给出了基于已知的传输效率数值模拟结果对不同阶段的损耗估算并最终估算传输效率的方法。
Based on the numerical simulation results in time domain, the characteristic of the power loss caused by the emitting electrons in the different phases of establishing the magnetic insulation is discussed in this paper. The loss is caused by the electrons losing to the anode and the movement of the electrons in the magnetic insulation. The corresponding impact factors to the loss are analyzed, which are the length and the radius ratio of the transmission line, the peak pulse voltage and the time-varying rate of the input pulsed power. By analyzing the values and the characteristics of the loss, and the corresponding electron distributions in different periods with different pulse excitations, a staged model is proposed to calculate the total transmission efficiency, which divides the entire establishment process into several phases according to the spatial distribution of the electrons between the electrodes. Based on the staged model and the simulation results presented in this paper, a method for estimating approximately the transmission efficiency is proposed, which does not need the numerical simulation any more.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2008年第2期343-348,共6页
High Power Laser and Particle Beams
基金
国家自然科学基金资助课题(50677028)
高等学校博士点专项科研基金资助课题(20050003007)
关键词
脉冲功率系统
磁绝缘传输线
能量损失
传输效率
Pulsed power system
Magnetically insulated transmission lines
Power loss
Transmission efficiency
