Dispersion analysis of the solid helical pulse-forming line

Wang, Langning; Liu, Jinliang

doi:10.1017/s0263034615000439

Cited by 8 publications

(2 citation statements)

References 31 publications

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“…To address such a dilemma of optical impedance and pulse width, a coaxial helical pulse forming line is developed, following the method in reference [25]. References [26][27][28] give the analysis and simulation of the helical structure. The main idea is that during the slow charging period, the helical inner cylinder works essentially like a straight cylinder, and the inner conductor radius is optimized to have maximum energy storage; during the fast pulse forming period, the helical line is practically a slow wave structure, and as a result, the output pulse width is lengthened, and the apparent impedance is increased.…”

Section: Helical Pulse Forming Linementioning

confidence: 99%

A Repetitive Low Impedance High Power Microwave Driver

et al. 2022

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A low impedance high power microwave (HPM) driver is designed, which can be used in studying multi-gigawatt HPM devices such as the magnetically insulated transmission line oscillator (MILO), based on a helical pulse forming line (PFL) and the Tesla pulse transformer technology. The co-axial PFL is insulated by ethanol–water mixture, whose dielectric constant can be adjusted; and the helical line increases the output pulse width as well as the impedance to make a better match with the load. By the optimal combination of PFL charging voltage and output switch working voltage, the reliability of the PFL can be improved. The Tesla transformer has partial magnetic cores to increase the coupling coefficient and is connected like an autotransformer to increase the voltage step-up ratio. The primary capacitor of the transformer is charged by a high voltage constant current power supply and discharged by a triggered switch. A transmission line is installed between the PFL and the HPM load, to further increase the load voltage. A ceramic disk vacuum interface is used for improving the vacuum of the HPM tube. The experiments show that the driver can operate at 30 GW peak power, 75 ns pulse width and 5 Hz repetition rate.

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Section: Helical Pulse Forming Linementioning

confidence: 99%

A Repetitive Low Impedance High Power Microwave Driver

et al. 2022

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“…By means of Series resonance network, the order and parameter in Pulse Forming Network can be determined. But the value of inductance and the other components value in Pulse Forming Network which used hydrogen thyratron designed by Series resonance network are so large that it increases the difficulty of manufacturing and cannot be widely used in engineering practice [1][2][3][4][5]. World field scholars have conducted a lot of research on PFN design, for instance, Harchandani and Gorade [6] studied the PFN of Marx generator with boosting operation; scholar Zhu [7] of Xiꞌan Jiaotong University optimized the design of compact-style PFN; Ma and Li [8] of China Academy of Engineering Physics designed a charging source for PFN formed by cascaded Blumlein pulse; Long and Liu [9] of the National University of Defense Science and Technology of China researched the Marx PFN; Chang [10] of China Academy of Engineering Physics developed a 100 KV low-impedance Blumlein PFN with non-uniformly distributed parameters [11,12].…”

Section: Introductionmentioning

confidence: 99%

Design of Pulse Forming Networks Triggered by High-Power Hydrogen Thyratron

2023

Teh. vjesn.

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Hydrogen thyratron is a switching device invented based on the phenomenon of gas discharge, and it is widely used in the field of high-power pulse technology. The design of Pulse Forming Network (PFN) triggered by hydrogen thyratron aims to control the switch of subsequent circuit, and shorten the gate-cathode voltage and conduction delay time by increasing the rise rate of the trigger voltage. However, in the currently adopted series resonance network design schemes, usually the value of inductance is very large, which can easily lead to the decline in the electromagnetic compatibility performance; moreover, the large distribution of network component parameters will greatly increase the fabrication difficulties. In view of the features of high-power hydrogen thyratron and the design requirements of PFN, this paper adopted the series resonance network design scheme to devise network series and parameters of the PFN and analyze the shortcomings of the series resonance network design scheme; then, it used the anti-resonance network to design a three-stage transform algorithm model, so as to achieve the purpose of reducing the inductance of the PFN and the difficulty of capacitance model selection in engineering practice. At last, simulation results verified the correctness and feasibility of the designed three-stage transform algorithm model, providing evidences for the pulse network projects of hydrogen thyratron and other high-power equipment in terms of implementation paths, methods, and algorithm models.

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Investigation of a novel solid-state dual meander pulse-forming line with 10 kV-class withstand voltage

Zhao¹,

Wang

Chu

et al. 2020

AIP Advances

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The meander pulse-forming line (MPFL) is one kind of prospective solid-state device for compact, reliable pulsed power systems. This paper demonstrates that a dual meander pulse-forming line (DMPFL) further improves its withstand voltage upon previous MPFLs by optimizing the distribution of the fringing electric field around the electrodes to mitigate the field enhancement. The DMPFL is formed by connecting two MPFLs in parallel on a glass-ceramic substrate. The dispersion characteristics of the DMPFL including its characteristic impedance and electric length are analyzed. Then, the delay time and pulse-forming characteristics are simulated with computer simulation technology (CST) Microwave Studio software. On this basis, experiments are performed to investigate its practical withstand voltage and pulse-forming ability. The experimental results agree with the calculation and simulation results. At last, we tried to integrate the Blumlein module based on the DMPFL with the photoconductive semiconductor switch to form a compact solid-state pulse generator.

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Dispersion analysis of the solid helical pulse-forming line

Cited by 8 publications

References 31 publications

A Repetitive Low Impedance High Power Microwave Driver

A Repetitive Low Impedance High Power Microwave Driver

Design of Pulse Forming Networks Triggered by High-Power Hydrogen Thyratron

Investigation of a novel solid-state dual meander pulse-forming line with 10 kV-class withstand voltage

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