Impedance Matching of a Coaxial Marx Generator with a Relativistic Field Emission Limited Diode

Summary form only given. The impedance matching between the coaxial Marx generator and the relativistic field emission limited diode (RFELD) is investigated by using the PSpice simulations. The PSpice model of the coaxial Marx generator has been verified by comparing the output voltage waveforms with the results of Kubota et al. (1981). By varying the passive resistive loads, the impedance of the coaxial Marx generator can be determined. In the PSpice simulation, the analog behavioral modeling (ABM) of the diode is employed to describe the I-V characteristics of the RFELDs. The output characteristics including the voltage, current, and output power waveforms, have been obtained. It is found that the output characteristics of the RFELDs with an effective work function of around 0.4 eV are in good matching with the coaxial Marx generator. The simulation results show that a degradation in pulse duration or beam power for the cases of the RFELDs with higher or lower effective work functions. The impedance matching of the RFELDs with the coaxial Marx generator can be achieved and the corresponding output characteristics can be determined. Detail analysis and simulation results will be presented.