Surface effects in a capacitive argon discharge in the intermediate pressure regime

The excitation structure in a micro-hollow cathode discharge in the normal regime at medium argon pressure

A microplasma is generated in the microhole (400 μm diameter) of a molybdenum-aluminamolybdenum sandwich (MHCD type) at medium pressure (30-200 Torr) in pure argon. Imaging and emission spectroscopy have been used to study the light emission mechanisms in the microdischarge. We find that emission intensities of both argon atom and argon ion lines present sharp peaks located near the cathode, an...

Different Pressure Regimes of a Surface-wave Discharge in Argon: a Modeling Investigation

In this paper, we present a 2D axisymmetric plasma fluid model for microwave plasmas operating in argon. The effect of the pressure on the plasma parameters is studied over a wide range of pressures going from 10 mbar to atmospheric pressure. The model shows that the discharge contracts with the increase of gas pressure. Additionally, a first reduction of the CO2 chemistry set of [11,12] from 1...

Pressure effect on a tandem hollow cathode discharge in argon

the effects of changing roughness on the flow structure in the bends

flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...

critical period effects in foreign language learning:the influence of maturational state on the acquisition of reading,writing, and grammar in english as a foreign language

since the 1960s the age effects on learning both first and second language have been explored by many linguists and applied linguists (e.g lennerberg, 1967; schachter, 1996; long, 1990) and the existence of critical period for language acquisition was found to be a common ground of all these studies. in spite of some common findings, some issues about the impacts of age on acquiring a second or...