Capacitance calculation and simulation of Blumlein pulse modulator

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 exact parameters of the Blumlein type Spark-03 PFL, a finite element method was used. A 2-D axially symmetric model of a compact accelerator based on thd Blumlein line with water dielectric was established. The electric field distribution and capacitance of the accelerator were derived using the electric energy integral method. Result comparison among the calculation, theory and experiment show that the calculated values are closer to the experimental ones than the theoretical values are．