Nowadays the main driving parameters for the radio transmitter research are: energy efficiency, frequency re-configurability and integration. Pulsed transmitter architectures have attracted large interest in the recent years due to their potential to meet these demands. In pulsed transmitters, a highly efficient switch mode power amplifier (SMPA) is used in conjunction with a pulse modulator to...

Pulsed energization of electrostatic precipitator (ESP) may represent one of the most promising solutions to comply with strict environmental regulation in case of high resistivity dust. Performs a parametric cost comparison between conventional and pulsed ESP with reference to four main industrial areas: electric power generation, cement manufacturing, iron and steel production, glass industry...

This paper focuses on improving the energy conversion process for low-voltage energy harvester powered wireless sensors by optimising the conversion stages for pulsed sensor operation. The proposed circuit has been designed to operate efficiently with both a low-voltage low-power energy harvester source and a low-power pulsed load. This ensures that continuous conversion losses are kept to a mi...

This paper describes a pulsed electron gun that can be used as an FEL, as an injector for electron linear accelerators or for rf power generation. It comprises a 1 to 5 MeV, 1 to 2 ns pulsed power supply feeding a single diode, photoexcited acceleration gap. Beam quality of a ~ 1nC charge in ~ 1 GV/m field was studied. Computations of the beam parameters as a function of electrode configuration...

Abstract—An X-band active radial-waveguide pulsed power amplifier (PA) with high power and high power added efficiency (PAE) is designed, fabricated, and measured in this paper. A bandwidth of 1000 MHz with peak power level of 53.2 dBm at the frequency 9.85GHz, under the condition of 4 kHz pulse repeat frequency (PRF) and 10% of duty cycle, has been obtained by five-way radial waveguide power c...

This paper investigates the near field, far field and conducted electromagnetic emissions in a pulsed power supply circuit for a flash lamp pumped solid-state laser amplifier. The power supply consists of a charging circuit, which energizes 300 μF of energy storage capacitor bank to 3 kV. The stored energy is discharged through a flash lamp in the form of pulsed current. It is a single shot eve...

The general properties of the non-thermal non-pulsed X-ray emission of rotation powered pulsars are investigated in the context of a pulsar wind nebula model. An examination of the observed X-ray emission from a sample of 23 pulsars in the energy range between 2-10 keV reveals that the relation of X-ray luminosity, Lx, to the pulsar spin down power, Ė, is steeper for the non-pulsed component th...

Power-pulsed lavage is a common adjunct to surgical wound debridement, although few studies have examined the effect of this technique in lower extremity wounds. Fifty-five consecutively enrolled patients underwent 73 surgical debridements with power-pulsed lavage, and specimens were obtained for Gram stain and culture and sensitivity analyses before and after lavage. A number of risk factors w...

Continuous wave operation of inductively coupled plasma ~ICP! reactors as used for materials processing and which have geometrical or flow asymmetries may produce asymmetric species densities, temperatures, and fluxes. Flow asymmetries that produce nonuniformities in plasma conductivity initiate a positive feedback loop. In this feedback loop, asymmetries in conductivity are reinforced by the r...

Basing on the pseudospark discharge, a low pressure gas discharge in a special geometry, fast closing switches for different pulsed power applications have been designed. Medium power PSS (< 30 kA peak current) were used in laser circuits whereas high current PSS are tested successfully in high current pulsed power applications (< 200 kA). For currents of a few kA the discharge is supported by ...