采用有限元方法,针对水介质Blumlein结构的Spark-03加速器进行了相关参数的计算。给出了准确的2维CAD模型,对各个部分做了介绍,计算出加速器内部电场分布;利用对电场能量积分的方法,当Blumlein传输线的内筒、中筒分别充电时,对传输线各个部分进行能量积分,给出了加速器各个部分电容的数值;将计算结果与理论值、实验结果相比较,证明了此方法可以更准确的计算加速器电容。应用此方法,可以对不同类型的电容储能型加速器进行参数的模拟计算。

The theoretical calculation of Blumlein pulse forming line (PFL) is complicated and maybe inaccurate. It is often difficult to get reliable direct electrical measurements due to the scale of these machines. To determine the exact parameters of the Blumlein type Spark-03 PFL,a finite element method is used. 2-D axial symmetry model of a compact accelerator based on Blumlein line of water dielectric was established. The electric field distribution and the capacities of the accelerator were given using the electric energy integral method. The calculated values compare well with those that can be measured or estimated.