Recently, a constricted attachment of an atmospheric pressure low-current argon arc in the
centre of the flat end face of a thoriated tungsten cathode was observed and …

Experiments and simulations of rotating Rayleigh-Bénard convection in cylindrical samples
have revealed an increase in heat transport with increasing rotation rate. This heat transport …

Operating high-intensity discharge lamps in the high frequency range (20-300 kHz) provides
energy-saving and cost reduction potentials. However, commercially available lamp drivers …

Time-averaged temperature distributions along the electrodes of vertically operated high-
intensity discharge lamps with cylindrical quartz burners filled with mercury and additives of …

Axial segregation in metal-halide lamps is caused by a complex interaction between
convection and diffusion and is not yet fully understood. By enhancing convection, by …

The dimming of metal-halide plasma lamps means leaving the optimized technical lamp
performance. As a consequence, the discharge behavior changes, which affects the …

Abstract Imaging Laser Absorption Spectroscopy (ILAS) was performed on a metal-halide
lamp under hyper-gravity conditions in a centrifuge (acceleration ranging from 1 to 10g) …

The effect of the competition between convection and diffusion on the distribution of metal
halide additives in a high pressure mercury lamp has been examined by placing COST …

Spots on cathodes of high-pressure arc discharges induced by a rapid increase in the arc
current are studied numerically and experimentally. Appearance of stationary and transient …

Abstract In 1912 Charles Steinmetz was granted a patent for a new light source. By adding
small amounts of sodium, lithium, rubidium and potassium to a mercury lamp he was able to …