scholarly journals Fast-charging Blumlein pulse forming line

1997 ◽  
Vol 15 (2) ◽  
pp. 249-257 ◽  
Author(s):  
K. Masugata ◽  
S. Tsuchida ◽  
H. Saitou ◽  
K. Yatsui ◽  
K. Shibata ◽  
...  
Keyword(s):  
Pulse Length ◽  
Output Pulse ◽  
Energy Transfer Efficiency ◽  
Pulsed Power ◽  
Marx Generator ◽  
Output Pulse Energy ◽  
Charging Time ◽  
Fast Charging ◽  
Charging Energy ◽  
A Current

A fast-charging, discharge-switch-free Blumlein pulse forming line has been developed for high-voltage pulsed power generation. In the BL, a saturable charging inductor (CI) of amorphous metallic core is utilized and, as a result, fast-charging (charging time ≈220 ns) is obtained with a reduced prepulse. In addition, by using CI as a step-up transformer, the impedance of the output pulse can be converted to 4Z, Z, Z/4. By using the BL with a Marx generator of 300 kV and 1.1 kJ, an output of —580 kV at 24 kA and a pulse length of 60 ns are obtained, with a current rise time of less than 16 ns. The energy transfer efficiency of the line (output pulse energy/charging energy of a pulse forming line) is evaluated to be more than 92%.

scholarly journals Compact Solid-State Marx Generator for Repetitive Applications

2020 ◽  
Vol 10 (5) ◽  
pp. 6224-6230
Author(s):  
N. Pinjari ◽  
S. Bindu
Keyword(s):  
Solid State ◽  
Rise Time ◽  
Pulse Width ◽  
Output Pulse ◽  
Vital Role ◽  
Pulsed Power ◽  
Marx Generator ◽  
Peak Voltage ◽  
Charging Time ◽  
Time Period

The Marx generator plays a vital role in a pulsed power system. In this paper, a modified compact bipolar output pulse solid-state Marx generator topology is developed. A three-stage prototype is designed and tested, in which pulse width, polarity, and peak voltage of the output pulse are made variable. It is possible to generate either positive or negative pulses with less rise time. Various components which affect the repetitive frequency of the developed Marx generator are evaluated. Analysis reveals that the total time period TO is a function of capacitor charging time. This is been validated experimentally by operating the Marx generator for different pulse repetition frequencies. The type of charging method solely controls the charging time of the capacitor and hence the repetition frequency.

Inductive Pulsed-Power Supply With Marx Generator Methodology

2009 ◽  
Vol 45 (1) ◽  
pp. 237-240 ◽  
Author(s):  
Y. Aso ◽  
T. Hashimoto ◽  
T. Abe ◽  
S. Yamada
Keyword(s):  
Power Supply ◽  
Pulsed Power ◽  
Marx Generator ◽  
Pulsed Power Supply

Pulsed high-current discharge in water: adiabatic model of expanding plasma channel and acoustic wave

2021 ◽  
Author(s):  
Andrey V. Kozyrev ◽  
Andrey A. Zherlitsyn ◽  
Natalia S. Semeniuk
Keyword(s):  
Acoustic Wave ◽  
Pulsed Power ◽  
High Current ◽  
Number Density ◽  
Pulsed Discharge ◽  
Current Channel ◽  
High Current Discharge ◽  
Isothermal Plasma ◽  
A Current ◽  
Good Agreement

Abstract This paper presents the results of a theoretical and experimental study of the use of a pulsed discharge in water to obtain a strong acoustic wave in a liquid medium. A discharge with a current amplitude of 10 kA, a duration of 400 ns, and an amplitude pulsed power of 280 MW in water at atmospheric pressure created an expanding acoustic wave with an amplitude of more than 100 MPa. To describe the formation of the discharge channel, an isothermal plasma model has been developed, which made it possible to calculate both the expansion dynamics of a high-current channel and the strong acoustic wave generated by it. Our calculations show that the number density of plasma in the channel reaches 10^20 cm^(–3), while the degree of water vapour ionization is about 10%, and the channel wall extends with a velocity of 500 m/s. The calculations for the acoustic wave are in good agreement with measurements

scholarly journals Recent advances in compact repetitive high-power Marx generators

2019 ◽  
Vol 37 (01) ◽  
pp. 110-121 ◽  
Author(s):  
Falun Song ◽  
Fei Li ◽  
Beizhen Zhang ◽  
Mingdong Zhu ◽  
Chunxia Li ◽  
...  
Keyword(s):  
High Power ◽  
Printed Circuit Board ◽  
Pulse Generator ◽  
Pulsed Power ◽  
Circuit Board ◽  
Constant Current ◽  
Marx Generator ◽  
Power Generators ◽  
Square Wave ◽  
Film Dielectric

AbstractThis paper introduces recent activities on Marx-based compact repetitive pulsed power generators at the Institute of Applied Electronics (IAE), China Academy of Engineering Physics (CAEP), over the period 2010–2018. A characteristic feature of the generators described is the use of a simplified bipolar charged Marx circuit, in which the normal isolation resistors or inductors to ground are removed to make the circuit simpler. Several pulse-forming modules developed to generate a 100 ns square wave output are introduced, including thin-film dielectric lines of different structures, a pulse-forming line based on a Printed Circuit Board, and non-uniform pulse-forming networks. A compact repetitive three-electrode spark gap switch with low-jitter, high-voltage, and high-current was developed and is used in the generators. A positive and negative series resonant constant current power supply with high precision and high power is introduced. As an important part of the repetitive pulse power generator, a lower jitter pulse trigger source is introduced. Several typical high-power repetitive pulsed power generators developed at IAE are introduced including a 30 GW low-impedance Marx generator, a compact square-wave pulse generator based on Kapton-film dielectric Blumlein line, a 20 GW high pulse-energy repetitive PFN-Marx generator, and a coaxial Marx generator based on ceramic capacitors. The research of key technologies and their development status are discussed, which can provide a reference for the future development and application of miniaturization of compact and repetitive Marx generators.

scholarly journals Characteristics of pulsed power generator by versatile inductive voltage adder

2005 ◽  
Vol 23 (4) ◽  
pp. 573-581 ◽  
Author(s):  
KIYOSHI YATSUI ◽  
KOUICHI SHIMIYA ◽  
KATSUMI MASUGATA ◽  
MASAO SHIGETA ◽  
KAZUHIKO SHIBATA
Keyword(s):  
Electron Beam ◽  
Output Voltage ◽  
Potential Gradient ◽  
Open Circuit ◽  
Pulsed Power ◽  
Marx Generator ◽  
Good Reproducibility ◽  
Charge Voltage ◽  
Power Generator ◽  
Pulsed Power Generator

A pulsed power generator by inductive voltage adder, versatile inductive voltage adder (VIVA-I), which features a high average potential gradient (2.5 MV/m), was designed and is currently in operation,. It was designed to produce an output pulse of 4 MV/60 ns by adding 2 MV pulses in two-stages of induction cells, where amorphous cores are installed. As a pulse forming line, we used a Blumlein line with the switching reversed, where cores are automatically biased due to the presence of prepulse. Good reproducibility was obtained even in the absence of the reset pulse. Within ∼40% of full charge voltage, pulsed power characteristics of Marx generator, pulse forming line (PFL), transmission line (TL), and induction cells were tested for three types of loads; open-circuit, dummy load of liquid (CuSO4) resistor, and electron beam diode. In the open-circuit test, ∼2.0 MV of output voltage was obtained with good reproducibility. Dependences of output voltage on diode impedances were evaluated by using various dummy loads, and the results were found as expected. An electron-beam diode was operated successfully, and ∼18 kA of beam current was obtained at the diode voltage of ∼1 MV.

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