Analysis and Research on Electromagnetic Coupling within PFN-Marx Generator

Liu Shifei; Zhang Jiande; Zhang Zicheng; Qiu Xudong; Gao Minzhu; Li Rui; Zhou Yekai

doi:10.11884/HPLPB202638.250264

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Article Navigation > High Power Laser and Particle Beams > 2026 > Accepted Manuscript

Liu Shifei, Zhang Jiande, Zhang Zicheng, et al. Analysis and Research on Electromagnetic Coupling within PFN-Marx Generator[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250264

Citation:

Liu Shifei, Zhang Jiande, Zhang Zicheng, et al. Analysis and Research on Electromagnetic Coupling within PFN-Marx Generator[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250264

Liu Shifei, Zhang Jiande, Zhang Zicheng, et al. Analysis and Research on Electromagnetic Coupling within PFN-Marx Generator[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250264

Citation:

Liu Shifei, Zhang Jiande, Zhang Zicheng, et al. Analysis and Research on Electromagnetic Coupling within PFN-Marx Generator[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250264

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Analysis and Research on Electromagnetic Coupling within PFN-Marx Generator

doi: 10.11884/HPLPB202638.250264

1.
Northwest Institute of Nuclear Technology, Xi’an 710024, China
2.
National University of Defense Technology, Changsha 410073, China
3.
Fudan University, Shanghai 200433, China

Received Date: 2025-08-19
Accepted Date: 2026-01-26
Rev Recd Date: 2026-02-03

Available Online: 2026-02-27

Abstract

Abstract

Background
The quasi-square wave output characteristic of PFN-Marx generator is a pair of contradictions with the compactness of the setup. With the higher requirement of the compactness of the setup, the inter stage electromagnetic coupling of PFN wave transmission becomes more and more obvious, which has a significant effect on the pulse modulation characteristics of PFN and further affects the quasi-square wave output characteristics of the generator.
Purpose
It is necessary to conduct an investigation into the electromagnetic coupling during the wave transmission process of the PFN-Marx generator and derive the corresponding calculation formulas. This allows for the avoidance of specific electromagnetic couplings during the design phase, ensuring both the quality of the output waveform and the compactness of the device.
Methods
This paper conducts electromagnetic coupling analysis of PFN during the discharging process of PFN Marx generator. Firstly, the electromagnetic coupling phenomenon in the PFN and between the PFNs are analyzed by theoretical derivation, and the calculation formulas are obtained. Then, the 3D model of the typical PFN Marx generator is built up for field circuit simulation. Finally, a single-stage generator and a multi-stage generator are built for experimental verification.
Results
The experimental results verify the theoretical analysis and simulation results, showing good consistency. The preliminary design optimization directions for the PFN-Marx generator can be outlined as follows:1. Maintain appropriate inter-wire spacing;2. Increase design redundancy to compensate for electromagnetic coupling;3. Keep the transmission lines neat and regular to minimize unnecessary electromagnetic coupling.
Conclusions
Based on the above results, we can improve the understanding of electromagnetic coupling in the wave transmission of PFN-Marx generator, so as to avoid partial electromagnetic coupling in design and improve the square wave output ability of PFN-Marx generator. This paper can provide technical reference for the development of quasi-square wave technology and compact technology of PFN-Marx generator.
- wave transmission,
- electromagnetic coupling,
- field-circuit simulation,
- pulse forming network,
- PFN-Marx generator

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References(21)

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