Electron beam pinch simulative study of rod-pinch diode driven by 40-stage FLTD module
-
摘要: 快放电直线型变压器 (FLTD)直接驱动阳极杆箍缩二极管(RPD)技术的紧凑型闪光照相装置是当前研究的热点。采用数值模拟(PIC)方法，建立了40级串联FLTD的粒子模拟模型，研究了不同触发时序下次级分别为正、负极性时的输出特性；在此基础上，初步模拟了RPD在4 MV电压下的箍缩特性。结果为：在脉冲源参数和负载相同的情况下，次级MITL内筒为正极性时的阴极传导电流比例明显低于负极性情况；在脉冲源输出电压4 MV时，RPD电子束箍缩良好，电子束的轴向分布较为集中，38%的电子束沉积在距离针尖1.5 mm的区域。Abstract: A compact flash radiography accelerator based on fast linear transformer driver(FLTD) and rod-pinch diode(RPD) becomes the research hotspot. A PIC model of the 40-stage FLTD driven RPD was built. The output characteristics of positive and negative polarity of magnetically insulated transmission line(MITL) inner electrode were compared and analyzed, and the properties of electron beam pinch for RPD at the diode voltage of 4 MV was simulated. Simulation results show that the effective electron current proportion in positive polarity MITL was lower than that in negative polarity MITL under the same condition. Under the diode voltage of 4 MV, the electron beam of RPD was pinched well and the electron beam distribution is concentrated in axial direction, and about 38% electrons hit 1.5 mm area around the needle point of the rod.
-
点击查看大图
计量
- 文章访问数: 1597
- HTML全文浏览量: 265
- PDF下载量: 257
- 被引次数: 0
下载:
