Pulsed Power For Repetitively Pulsed High-Power Discharge Lasers

1987 ◽  
Author(s):  
S. E. Ball ◽  
R. N. Hitchcock ◽  
H. G. Hammon III
Keyword(s):  
High Power ◽  
Pulsed Power

Limiting Power of High Power Microwave Pulses from Aperture

2011 ◽  
Vol 383-390 ◽  
pp. 638-642
Author(s):  
Jian Hua Zhang ◽  
Wei Hu
Keyword(s):  
Power Density ◽  
High Power ◽  
Equivalence Principle ◽  
Pulsed Power ◽  
Maximum Power ◽  
Center Frequency ◽  
Aperture Antenna ◽  
High Power Microwave ◽  
Air Breakdown ◽  
Power Microwave

Based on the field equivalence principle and the potential function, the axial normalized pulsed power density of the microwave radiated from the circle aperture antenna was deduced. The power density in the Fresnel region was calculated for uniform aperture and tapered one. The relations between the aperture antenna’s maximum power and the parameters including pulse width, aperture radius and the center frequency were analyzed. The formula of the antenna’s maximum power limited by the air breakdown due to high power microwave is presented.

scholarly journals Modeling Pulsed High-Power Spikes to Drive Piezoelectric Broadband Transducers Improving SNR in Ultrasonic Imaging & NDE

2021 ◽  
Author(s):  
Antonio Ramos ◽  
Abelardo Ruiz ◽  
Enrique Riera
Keyword(s):  
High Power ◽  
Dynamic Range ◽  
Ultrasonic Imaging ◽  
Average Power ◽  
Pulsed Power ◽  
Moderate Intensity ◽  
Signal To Noise ◽  
Discharge Generator ◽  
Piezoelectric Devices ◽  
Very High

Ultrasonic imaging & NDE applications can greatly improve their signal-to-noise ratios (SNR) by driving each transducer (composing piezoelectric arrays) with a spike giving pulsed power of k-Watts, repetitively at a PRF = 5000 spikes/s, by using a HV capacitive-discharge generator. However very-high levels, of pulsed intensities (3-10 A) and voltages (300-700 V) must be considered for a rigorous spike modeling. Even though the consumed "average" power will be small, the intensity through each transducer achieves several amperes, so the pulsed powers delivered by each HV generator can attain levels higher than in CW high-power ultrasonic applications: e.g., up to 5 kW / spike. This is concluded here from a transient modeling of the loaded generator. Then, unforeseen phenomena rise: intense brief pulses of driving power & emitted force in transducers, and non-linearities in driver semiconductors, because their characteristic curves only include linear ranges. But fortunately, piezoelectric devices working in this intense regime do not show serious heating problems, because the average power remains being moderate. Intensity, power and voltage, driving a broadband transducer from a HV capacitive pulser, are calculated to drastically improve (in ≅ 40 dB) the ultrasonic net dynamic range available, with emitted forces ≅ 250 Newtons pp and E/R received pulses of 70 V pp.

A novel high power optothyristor based on AlGaAs/GaAs for pulsed power-switching applications

1994 ◽  
Vol 41 (5) ◽  
pp. 819-825 ◽  
Author(s):  
J.H. Zhao ◽  
T. Burke ◽  
M. Weiner ◽  
A. Chin ◽  
J.M. Ballingall
Keyword(s):  
High Power ◽  
Pulsed Power ◽  
Power Switching

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.

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