An energy analyzer with the capability of making fast time-resolved measurements of the instantaneous electron current in a radiofrequency plasma has been designed and constructed. This current is then reconstructed into the instantaneous I-V characteristic at opposite phases of the RF cycle. Results are shown for the helicon wave discharge under various conditions. From the first derivative of...

Oxygen dissociation in Ar-O2 microwave surface-wave discharges at p = 1 − 25 mbar is theoretically investigated, focusing on the dependence of the dissociation degree on pressure and on the mixture composition. It is shown that the dissociation degree is higher for high Ar content discharges, due to the modifications in the electron energy distribution function (EEDF) and to the effectiveness o...

Abstract We have performed hybrid kinetic-fluid simulations of a positive column in alternating current (AC) argon discharges over range driving frequencies f and gas pressure p for the conditions when spatial nonlocality electron energy distribution function (EEDF) is substantial. Our confirmed that most efficient plasma maintenance are observed dynamic regime time modulations mean (temperatur...

Axial distributions of plasma and floating potentials, electron number density and the electron energy distribution function (EEDF) have been measured in the double layer (DL) region of an He discharge constriction. Excitation processes in the constriction region are studied. Using a linearization method for the nonstationary balance equations and choosing appropriate discharge conditions, ...

The model of a DC glow discharge with metastable argon atoms and dust particles based on the Boltzmann equation for electron energy distribution function (EEDF), particle charging, balance is presented. processes direct stepwise impact ionization, metastable-metastable collisions, recombination electrons ions surface tube wall are taken into account. results show that densities in strong correl...

In atmospheric pressure capacitively coupled microplasma jets, Voltage Waveform Tailoring (VWT) was demonstrated to provide ultimate control of the Electron Energy Distribution Function (EEDF), which allows enhance and adjust generation selected neutral species by controlling electron power absorption dynamics. However, at fundamental level, physical origin these effects VWT remained unclear. T...

The model of a DC glow discharge with metastable argon atoms and dust particles based on the Boltzmann equation for the electron energy distribution function (EEDF), dust particle charging, and balance equation for metastable argon atoms is presented. The processes of direct and stepwise electron impact ionization, metastable-metastable collisions, and recombination of electrons and ions on the...

The breakdown phase in a Plasma Focus (PF) device is not yet a well-understood phenomenon, even if widely known to be of great importance in the subsequent evolution of the discharge. A Particle-In-Cell (PIC) method coupled with a Monte-Carlo-Collision (MCC) module has been developed to study the time evolution of electron density and Electron Energy Distribution Function (EEDF) up to few tens ...

Trace rare gases–optical emission spectroscopy (TRG–OES) and Langmuir probe analysis have been used to measure the electron temperature, Te, in a high-density inductively (transformer) coupled (TCP) 10 mTorr oxygen plasma as a function of the 13.56 MHz radio frequency (rf) power. The oxygen atomic densities were estimated by O-atom optical emission (8446 Å), and rare gas actinometry (Ar, 7504 Å...