A Compact Modular 5 GW Pulse PFN-Marx Generator for Driving HPM Source

Zhang, Haoran; Shu, Ting; Liu, Shifei; Zhang, Zicheng; Song, Lili; Zhang, Heng

doi:10.3390/electronics10050545

Cited by 24 publications

(12 citation statements)

References 14 publications

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“…The established parameters of the Marx generator are listed in Table I. For comparison, the parameters of other generators of the same class presented in the open literature [7]- [11] are I. It is worth to note that each HV generator has a unique and sometimes bespoke design, and therefore, it is not completely relevant to compare these units.…”

Section: Discussionmentioning

confidence: 99%

Development and Test of a 500-kV Compact Marx Generator Operating at 100-Hz PRF

Zhabin

Lavrinovich

Ferron

et al. 2022

IEEE Trans. Plasma Sci.

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This article presents the electrical and mechanical design of a compact 13-stage 0.5-MV Marx generator operating at a pulse repetition frequency (PRF) of 100 Hz. The fast-switching process of the generator is based on spark gaps, operated under pressurized air and leading to the generation of an output pulsed voltage with a peak of 0.5 MV and a rise time of 15 ns when operated on a 300-load. Corona-stabilized electrodes are installed near the main gap of the switches to improve their operational stability and increase the PRF. To ensure compactness, the Marx generator is housed in a cylindrical metal vessel with a height of 92 cm and an outer diameter of 34 cm, having a total volume of 74 L. A highly accurate simulation using both PSpice and CST software packages was used to predict the impulse waveform at the output of the generator and to help in optimizing the generator design. The tests show a good agreement between the experimental data and the theoretical predictions.

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Section: Discussionmentioning

confidence: 99%

Development and Test of a 500-kV Compact Marx Generator Operating at 100-Hz PRF

Zhabin

Lavrinovich

Ferron

et al. 2022

IEEE Trans. Plasma Sci.

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“…The PFN consists of a consecutive array of L-C ladder circuit generating rectangular voltage pulses. When the PFNs are erected, the PFN-Marx generator produces a rectangular pulse with the pulse duration of the PFN which is multiplied by the charged voltage on the PFN and the number of stages [21][22][23]. By selecting proper inductance and capacitance values, the impedance of the PFN-Marx generator and that of the axial vircator can be matched without using additional impedance-matching devices, such as a tapered transmission line.…”

Section: Pfn-marx Generatormentioning

confidence: 99%

Experimental Investigation into the Optimum Position of a Ring Reflector for an Axial Virtual Cathode Oscillator

et al. 2021

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A ring reflector was experimentally investigated using an axial virtual cathode oscillator (vircator). The ring reflector was installed behind the mesh anode of the axial vircator to enhance the microwave power output by forming a resonant cavity and increasing the electron beam to microwave energy conversion efficiency. The optimum position of the ring reflector is analyzed through simulations and experiments by varying the anode to reflector distance from 6 mm to 24 mm in 3 mm steps. PIC simulations show that the ring reflector enhances the microwave power of the axial vircator up to 220%. Experiments show that the microwave power from the axial vircator without the ring reflector is 11.22 MW. The maximum average peak microwave power of the axial vircator with the ring reflector is 25.82 MW when the anode to ring reflector distance is 18 mm. From the simulations and experiments, it can be seen that the ring reflector yields decaying enhancement that is inversely proportional to the anode to ring reflector distance and there is no noticeable microwave enhancement after 24 mm. The frequency range attained from the simulations and experiments is 5.8 to 6.7 GHz and 5.16 to 5.8 GHz, respectively. The difference between the simulation and experimental results is due to the error in the anode to cathode gap distance. Although the frequency is slightly changed, the ring reflector seems to have no influence on the frequency of the generated microwave.

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“…In most cases, a pulsed power source is used as the high-voltage source. A Pulse Forming Network (PFN)-Marx generator is a pulsed power source to operate HPM devices [12,[29][30][31]. The PFN-Marx generator generates and applies a rectangular high-voltage pulse into the designated load without an additional pulse-forming stage.…”

Section: Pfn-marx Generatormentioning

confidence: 99%

Operation Features of a Coaxial Virtual Cathode Oscillator Emitting Electrons in the Outer Radial Direction

et al. 2021

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The operation features of the coaxial virtual cathode oscillator emitting electrons in the outer radial direction were investigated through simulations and experiments. A coaxial vircator was compared with an axial vircator when the anode to cathode distance of both vircators was 6 mm. The proposed coaxial vircator was operated when the anode to cathode distance was 5 mm, 6 mm, and 7 mm. The peak power and frequency of the microwave generated from the proposed coaxial vircator when the anode to cathode distance was 6 mm were 20.18 MW and 6.17 GHz, respectively. The simulations and experiments show that the proposed coaxial vircator generates 80% more microwave power than the axial vircator with the same anode to cathode distance. According to the simulations and experiments, the proposed coaxial vircator tends to generate a higher power average when the anode to cathode distance was larger than 5 mm. The frequency of the proposed coaxial vircator when the anode to cathode distance was 5 mm and 7 mm was approximately 8 GHz and 5 GHz, respectively. The geometric factor of the proposed coaxial vircator was considered to be the reason for the greater microwave power generation than the axial vircator. The frequency of the proposed coaxial vircator decreases inversely proportional with the anode to cathode distance as observed in the axial and basic coaxial vircators.

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A Compact Modular 5 GW Pulse PFN-Marx Generator for Driving HPM Source

Cited by 24 publications

References 14 publications

Development and Test of a 500-kV Compact Marx Generator Operating at 100-Hz PRF

Development and Test of a 500-kV Compact Marx Generator Operating at 100-Hz PRF

Experimental Investigation into the Optimum Position of a Ring Reflector for an Axial Virtual Cathode Oscillator

Operation Features of a Coaxial Virtual Cathode Oscillator Emitting Electrons in the Outer Radial Direction

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