Abstract A structurally simple dielectric barrier discharge based mercury-free plasma UV-light source has been developed for efficient water disinfection. The comprises of a arrangement between two co-axial quartz tubes with an optimized gas gap. outer electrode is aluminium baked foil tape arranged in helical form pitch, while the inner hollow metallic rod, hermetically sealed. Strong bands peaking at wavelengths 172 nm and 253 nm, along weak band wavelength 265 have simultaneously observed...

The experimental study of a tapered, multi-gap, multi-aperture pseudospark-sourced electron gun based X-band plasma assisted slow wave oscillator is presented. designed on the pseudospark discharge concept and has been used to generate high current density energy beam simultaneously. distribution apertures arranged such that field penetration potency inside backspace hollow-cathode different while passing through tapered gap region. This leads non-concurrent ignition all channels which is,...

Dielectric barrier discharges (DBDs) occur in the presence of at least one insulating layer contact with discharge between two planar or cylindrical electrodes connected to a high voltage supply. A quartz coaxial DBD tube, filled argon, has been studied and an electrical model characterizing proposed. The proposed considers geometry gas gap spacing properties dielectric material. sinusoidal up 2.4 kV peak frequencies from 20 100 kHz applied for generation microdischarges. By comparisons...

In this paper, a high current linear aperture radial multichannel Pseudospark switch (LARM-PSS) is reported which has been analyzed for its characteristics. order to enhance hold-off voltage and support hollow cathode effect the ignition of discharge in configuration, field penetration analysis through circular apertures electrodes carried out. The increase handling capacity than that without significant compromise capacity. developed LARM-PSS capable hold up 25 kV at gas pressure between 10...

This paper reports the development of a sealed-off double-gap pseudospark switch and its performance analysis. The modular geometry has two gaps that are separated by cavity drift space region. It utilizes single ferroelectric trigger unit in hollow cathode region first gap to initiate discharge for rapid breakdown both gaps. been pinched deuterium gas reservoir used maintaining optimum pressure device. design analyzed higher hold-off voltage with high charge transfer capability at...

In the present paper, a pseudospark discharge based multiple gap plasma cathode electron gun is reported which has been operated separately in self and trigger breakdown modes using two different gases, namely, argon hydrogen. The beam current energy have analyzed concentric ring diagnostic arrangement. Two distinct beams are clearly seen with hollow conductive phases. phase observed for ∼50 ns where obtained having low density high energy. While it beam. It inferred that more case whereas...

Abstract Wound healing is a dynamic and intricate biological process crucial for tissue repair regeneration. This study explores the potential therapeutic impact of non-thermal plasma generated by hand-held cold atmospheric pressure jet (C-APPJ) source on fibroblast cells (NIH/3T3) in vitro . The sequential phases wound healing—inflammation, cell proliferation, remodelling, were assessed context migration oxidative stress dynamics. Typically, generates mixture several reactive...

Four different configurations of plasma cathode electron (PCE) guns have been designed and developed in which pseudospark discharge concept has used. Experimental studies performed to identify the dependence geometrical design parameters like shape aperture, distribution apertures, number gaps between hollow anode on high-energy high-current-density beam emissions. The current density increased around five times by changing aperture from circular sheet keeping area other identical. perveance...

In this paper, an investigation has been carried out for the analysis of peak electron current at anode surface in pseudospark discharge-based plasma cathode (PCE) source using 2-D kinetic simulation code OOPIC-PRO. It observed that is a function hollow (HC) dimension, gas pressure, and seed energy. The also temporal evolution formation inside HC electron-beam generation processes. Trends size generated beams have presented as potential distribution aperture applied pressure. As result, on...

A plasma cathode electron (PCE) source using single-gap to multigap pseudospark discharge (PD) for the generation of high density and energetic beams has been proposed based on our study with help OOPIC PRO simulation code. The model comprises successive voltage breakdown processes PD-PCE sources. combined analysis a single gap operating gas pressures 20-60 Pa, applied voltages 20-35 kV, electrode aperture sizes 2-6 mm pulsed suitable potential growing applications in extreme ultraviolet...

In this paper, a cold cathode based sheet-beam plasma electron gun is reported with achieved current density ∼1 kA/cm2 from pseudospark argon for pulse length of ∼200 ns in single shot experiment. For the qualitative assessment sheet-beam, an arrangement three isolated metallic-sheets proposed. The actual shape and size sheet-electron-beam are obtained through non-conventional method by proposing dielectric charging technique scanning microscope imaging. As distinct earlier developed sheet...

In this article, the development and switching characterization of a coaxial three-gap demountable multigap multiaperture pseudospark switch (MGMA-PSS) prototype is presented. The investigated MGMA-PSS geometry has three gaps which are separated by two cavity drift space regions. A high dielectric constant ferroelectricbased single plasma trigger unit, located within hollow cathode first gap, used for effective discharge initiation subsequent synchronous breakdown MGMA-PSS. To guarantee long...

In this paper, experimental and simulation investigations have been carried out for the characterization of dielectric barrier discharge based cold atmospheric pressure plasma jet (C-APPJ) a unique geometry in which argon gas is used at different flow rates along with pulsed DC supply frequencies. A tapered structure has fabricated acquiring sufficient velocity low rate. The typical V–I characteristic C-APPJ presented wide range (1–5 SLM) frequencies (10–25 kHz). On increasing rate...

In this article, a trigger unit has been implemented to generate high-current-density electron beam from pseudospark (PS) discharge-based gun. A pulse power supply designed and developed provide the seed electrons ferroelectric cathode (FEC). The FEC used inside hollow cavity of single-gap PS gun operated in self-breakdown as well trigger-based breakdown mode. comparative analysis also performed between modes with unit's help for different applied gap voltages ranging 0 16 kV. is based on...

The Pseudospark switch is able to control high voltage and current discharges operates at low pressure like Thyratron but much simpler in construction does not suffer electrodes wear. This bipolar has 100 % reverse capability, faster than applications pulse power modulators, linear accelerators, laser systems etc. Such been developed CEERI Pilani tested a demountable setup. For this switch, as cold cathode based ferroelectric trigger source also characterized. High dielectric material opted...

In this paper, a xenon-filled coaxial dielectric barrier discharge (DBD) has been studied to understand the high-pressure nonequilibrium nonthermal plasma discharge. A quartz DBD tube (ID: 6 mm, OD: 12 mm) at 400-mbar pressure used in experiment. unipolar pulselike voltage up a-6-kV peak working 30 kHz applied electrodes for generation of microdischarges. single is observed per pulse. Visual images and electrical waveform confirm diffused-type discharges. The knowledge obtained by dynamic...

High voltage pulses of very short duration and fast rise time are required for generating uniform diffuse plasma under various operating conditions. Dielectric Barrier Discharge (DBD) has been generated by high to produce in the discharge gap. The pulse power generators have chosen according requirement DBD applications. In this paper, a compact solid-state unipolar generator constructed characterization plasma. This pulsar is designed provide repetitive 315 ns width, amplitude up 5 kV,...

Dielectric barrier discharge (DBD)-based plasma reactor and lamp are widely used for the growing areas of medical science, bacterial disinfection, pollution control, surface treatment, so on. In this article, a simplified high-frequency, high-voltage short-pulse power modulator (HV-SPPM) is proposed DBD sources that effectively capacitive loads. An energy circuit (EDC) has been devised in HV-SPPM to terminate pulses increase indefinitely load, which causes damage pulse modulator. The using...

In this paper, a quartz coaxial dielectric-barrier-discharge tube operated at different gas pressures and frequencies has been studied. A sinusoidal voltage up to 2.4 kVp with 34.5 47.5 kHz applied the discharge electrodes for generation of microdischarges. The experimental results confirm filamentary nature discharges when (300, 600, 1000 mbar) (34.5 kHz). relative influence given waveforms on parameters analyzed. An equivalent electrical circuit model representing multipeak phenomenon in...

A modular double gap pseudospark discharge based switch has been recently designed and developed for various pulsed power applications. The geometry two gaps that are separated by a cavity drift space region. It employs single trigger unit in the cathode region to initiate rapid breakdown of both gaps. Successful experiments with typical coaxial arrangement multichannel discharges were performed. peak currents at voltage about 40 kV 5 10 kA through resistive loads 5.25 2.7 Ω, respectively....

In this article, the investigation has been carried out for characterization of proposed tapered geometry dielectric barrier discharge (DBD)-based cold atmospheric pressure plasma jet (C-APPJ) on basis optical emission spectroscopy (OES) and imaging different operating parameters, such as argon gas flow rates, applied voltages, frequencies. The detailed characteristics formation plume using a working have presented wide range rates [1–3 standard liter per minute (SLM)] frequencies (15–25...