Measuring the atmospheric electric field is of crucial importance for studying discharge phenomena thunderstorm clouds. If one used to indicate occurrence a lightning event and zero non-occurrence event, then binary classification problem needs be solved. Based on established database weather samples, we designed prediction system using deep learning techniques. First, features time-series data from multiple measurement sites are extracted by sparse auto encoder (SAE) construct visual...

In this paper, the basic structure and working mechanism of laser triggered vacuum switch (LTVS) are briefly introduced, processes primary plasma production expansion also analyzed. A series experiments have been carried out under different conditions LTVS, such as energy levels, voltages, polarity configuration modes. The relationship conduction jitter time delays among energy, voltage, described, effect main electrode theoretical basis for optimization design LTVS is provided. Under...

The basic structure and work mechanism of laser-triggered vacuum switch (LTVS) are introduced briefly in this paper, the processes primary plasma production expansion analyzed as well. A series experiments has been carried out with different gap voltages, laser wavelengths, energies, polarity configuration modes, structures, focal lengths, waveforms. is modified to improve heavy-current capability switch, distance increased voltage capacity. special design trigger can reduce dependence on...

This paper reports the experimental investigation of dielectric barrier discharge in which gap area is filled with a two-phase mixture (TPM), air and solid particles. We found that there are two kinds discharges TPM. One surface generated on particles other filament void. For case low volume fraction particles, starts to occur when applied voltage higher than onset voltage. At further increase, takes place at same time. high fraction, such as packed-bed reactor, only exists. Under condition...

A two-phase mixture (TPM) is a of gas and macroparticles high concentration, there has been significant interest in many technical applications natural phenomena concerning discharges (TPMDs), but until now no widely accepted analysis for the propagation TPMs. In this paper, 21 kinds different dielectric materials are used to investigate effects on TPMD. The diameters TPMs measured by microscope, laser particle size analyzer, etc, volume fractions video camera image velocimetry system. Based...

Three kinds of water mist with different droplet sizes are applied to understand the effect on initiation and propagation discharges in a nonuniform field at atmospheric pressure. Based measurement three mists volume fraction droplets, is demonstrated by directly comparing percentages discharge path positions those air. It can be concluded that smaller μm-droplets has negative impact discharges; larger inhibited starting growth positive but contrary effects discharge.

According to the preliminary study, laser triggered vacuum switch (LTVS) might be an advanced high-voltage, high-intensity pulse switch. It will have advantages of short trigger conduction time and good isolation from main circuit. The study mechanism LTVS is not only conducive both optimization miniaturization, also beneficial promoting its practical process. In this paper, which has a composite electrode made potassium chloride titanium studied. material loss on focal spot before after...

A blue emitted transparent perovskite light-emitting diode was prepared by using quasi two-dimensional materials and multilayer top electrodes.

There has been a significant interest in many technical applications and natural phenomena concerning two-phase mixture discharges (TPMDs). Few studies have focused on the influences of different macroparticles TPMDs. The dielectric constant is usually considered to be only factor affecting discharges, but this paper, 21 kinds materials were used investigate effects By experimental results, paper reveals macroparticle sizes, little influence. When diameter TPMs less than about 0.01 mm,...

With the rapid expansion of urbanization, technology wastewater treatment has an increasingly crucial role in field environmental protection science and technology. The pulsed arc electrohydraulic discharge (PAED) been studied depth by virtue its signally effect, low power consumption, so on. experiments were carried out with from cyclic activated sludge system tank. 10-L PAED reactor eccentric electrodes is designed as industrialization mode. supply 3 kJ/pulse rate 2 Hz. on different...

Nowadays, the triggered vacuum switch (TVS) is widely used in electromagnetic launcher systems. An important performance of TVS with six-gap rod electrode system, which has long operating life and maximal switching capacity, been experimental research. The delay time an feature TVS. Therefore, this paper focuses on effect trigger circuit current characteristics result shows that, indirect circuit, by changing parameters pulse transformer capacitance <formula formulatype="inline"...

The study on the influence of laser wavelength initial plasma properties laser-triggered vacuum switch (LTVS) is not only beneficial to understanding trigger mechanism but also optimizing its design for miniaturization and generalization. In this paper, one-dimensional heat conduction model target was developed then effect depth ablation quantity were investigated experimentally theoretically with absorption rate. theoretical analysis in good agreement experimental measurement delay time...

An application of magnetic field to the nanosecond pulse corona discharge is investigated. A cylinder reactor with different electrodes set up for experimental study. its direction perpendicular applied. Different images are taken under single a high sensitive UV-visible light imagine recorder. Experimental results show that cross both generates paths and develops homogeneously in space more than without field. The may lead possibility apply on getting higher desulfurization efficiency.

A laser-triggered vacuum switch (LTVS) is an advanced closing with nanosecond delay and jitter. In order to enhance hold-off voltage extend the service lifetime of LTVS, we designed a multichannel (MLTVS) utilizing cone-shaped target electrode placed on cathode platform. The fabrication testing MLTVS described in this paper. Experimental results show that working gap distance 12 mm from 30 V 20 kV. threshold energy for triggering 0.4 mJ corresponding peak power density 27.9 MW/cm(2). spot...

With the development of pulsed-power technology, more and applications require high-voltage heavy-current pulse switches. Laser-triggered vacuum switch combines laser three-electrode trigger has advantages heavy current capability, good isolation from main circuit, short delay time. In this paper, 1-D thermal conduction model was developed to analyze influence energy on velocity initial plasma. The relationship between ablation area derived. theoretical analysis can be verified by time...

The prebreakdown current flowing in a laser-triggered vacuum switch (LTVS), investigated this paper, is below the threshold voltage, where becomes conducting. laser irradiates short time sintered KCl and Ti target of produces an initial plasma. currents are measured two different electrode geometries (planar multirod) at both polarities analyzed with respect to ion electron interactions electrodes. It found that peak value increases applied voltage across LTVS until 60 80 V, it turns...