Fast Processes in a N2O-Modulated Hollow Cathode Discharge: Excitation and Diffusion

Hollow Cathode Discharge Initiation and Fast Starting Cathode

Conditioning of the insert inside a hollow cathode is believed to be important to ensure reliable discharge initiation and subsequent cathode operation. The desorption of contaminates is reported from hollow cathodes as a function of heater power to quantify cathode conditioning characteristics and identify factors that might prevent the fast initiation of a discharge. In addition to conditioni...

EEDF MEASUREMENTS AND EXCITATION PROCESSES IN THE VICINITY OF A HELIUM DISCHARGE CONSTRICTION

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, ...

Pressure effect on a tandem hollow cathode discharge in argon

-BΣu band spectra in a hollow-cathode glow discharge

An excitation-emission model for the H2 IΠ +/− g −BΣu transition has been developed based on the coronal equilibrium. Within the framework of the adiabatic theory, the vibronic transition probability is calculated instead of the Franck-Condon factor. The ro-vibrational temperatures are evaluated through the experiment carried out in a low-density hollow-cathode plasma. The evaluated temperature...

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...