نتایج جستجو برای: bipolar pulsed power generator

تعداد نتایج: 588321  

Journal: :IEEE Electron Device Letters 2022

In this letter, we have studied the temporal evolution of switching for each stage Marx generator with picosecond and millimeter spatial resolutions employing terahertz measurements. The circuit utilizes collapsing-field-domain (CFD)-based avalanche switches, which are formed in a bipolar GaAs structure result speed powerful carrier generation electrical switching. application CFD-based switche...

Journal: :journal of medical signals and sensors 0
hajarossadat asgarifar adekunle oloyede firuz zare

background: this study is the first research investigating the possible effect of pulsed power signals on the characteristics of cortical bone by comparing the mechanical properties of this type of bone pre and post expose to pulsed power. methods: a positive buck-boost converter was applied to generate adjustable high voltage, high frequency pulses (up to 500 v and 10 khz). the functional beha...

2004
Stephan Roche

A Pulsed Power System is characterized by its energy storage system, the energy can be released in the form of a high power pulse to the load, by means of a switching device. The energy storage is usually either of an inductive or a capacitive nature. The limiting device in a Pulsed Power System is often the switch, which limits the pulse peak power and the repetition rate. The conventional app...

Journal: :روش های عددی در مهندسی (استقلال) 0
سید مرتضی سقائیان نژاد و فرزاد فرهمند s.m. saghaian and f.farahmand

in this article our objective is to obtain steady state characteristics of shunt, series, and separately excited dc motors coupled with a centrifugal water pump supplied through a step-up, step-down, and cuk converter from photovoltaic generator. we assume that there are no storage batteries and, of course, the system must operate on maximum utilization i.e. maximum water must be pumped. it is ...

2014
D. Wu R. Todd A. J. Forsyth

An energy management controller based on multiple charge/discharge profiles is proposed and analysed for an energy storage system. Each profile is designed to use the available energy more aggressively in different power regions, including the low or the high power regions, or both regions to minimise the rate-of-change of power source output. The performance of the energy storage system with t...

2011
Jet G. M. El - Aragi

Non-equilibrium cold plasma jets generated under atmospheric pressure by means of high voltage pulsed power generator are extended up to a few centimeters long in the surrounding air. The generator is consisting of a negative dc source, a Blumlein-type pulse-forming network (E-PFN), and a dynamic spark gap switch. The plasma jet generated by the device using helium as the operating gas depends ...

2012
W. Zhang J. Sandberg H. Hahn

Our recent effort to test a 50 kV, 1 kA, 50 ns pulse width, 10 ns pulse rise time FID pulse generator with a 250 ft transmission cable, resistive load, and existing RHIC injection kicker magnet has produced unparalleled results. This is the very first attempt to drive a high strength fast kicker magnet with a nano second high pulsed power (50 MVA) generator for large accelerator and colliders. ...

2014
Piero Rossi Pierluigi Bove Mauro Montuori Adriano De Majo Edoardo Ricciardi Maurizio Mattei Roberta Bernardini Luigino Calzetta Paolo Mauti Lorenzo Intini Valentino Quattrini Carlo Chiaramonte Giuseppe Vespasiani

BACKGROUND The aim of this research project was the realization of an incremental bipolar radiofrequency generator with inline 4-electrode probe for partial renal resection without clamping of the vessels. METHODS The experimentation was carried out across two phases: the preliminary realization of a specific generator and an inline multielectrode probe for open surgery (Phase 1); system test...

ژورنال: مجله دندانپزشکی 2001
حسنی طباطبایی, معصومه , پهلوان, ایوب ,

The purpose of this study was to evaluate the effect of pulsed Nd:YAG laser on the dentin surface by scanning electron microscope (SEM) in order to determine the optimum time and power of radiation to seal the exposed dentinal tubules. Horizontal sections were taken from newly extracted impact third molar teeth. Smear layers from the dentin surfaces were removed by phosphoric acid and all sampl...

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