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Displaying 26 - 49 of 49

Laboratory X-Ray Imaging of High-Intensity Discharge Lamps

July 22, 2005
Author(s)
John J. Curry, B Lafitte
We describe a laboratory-scale system for x-ray absorption imaging of the Hg vapor distribution in high-intensity discharge plasmas. This system utilizes commercially-available equipment, including an x-ray tube source. We analyze the sensitivity of the

X-Ray Absorption Imaging of High-Pressure Lighting Plasmas

April 1, 2005
Author(s)
John J. Curry, Craig J. Sansonetti
X-ray absorption has been used to image the distribution of Hg in high-pressure arc lamps used for lighting (Curry, Sansonetti, and Wang, in progress). Here, several images are presented showing the analytic transformation of raw x-ray data into an image

Power Balance in Highly Loaded Fluorescent Lamps

October 28, 2004
Author(s)
G G. Lister, John J. Curry, James E. Lawler
Discrepancies reported in the literature between numerical predictions and experimental measurements in low-pressure Hg discharges at high current densities are considered. A one-dimensional fluid model and recent spectroscopic and Langmuir probe

Deviations From Equilibrium of Thallium Level Populations in a Metal Halide Arc Lamp

July 1, 2004
Author(s)
D Karahourniotis, John J. Curry, E Drakakis, Eric C. Benck
The excitation equilibrium in a metal halide lamp was studied using a method based on optically thick lines without the assumption of local thermodynamic equilibrium (LTE). The lamp has a diameter of 15.4 mm, an electrode gap of 28 mm, and was operated

Direct Observation of De-Mixing in a Ceramic Metal-Halide Arc Lamp

June 18, 2003
Author(s)
John J. Curry, H G. Adler, S Shastri, W -. Lee
De-mixing of additives in a vertically-operated DyI 3-CsI-Hg ceramic metal halide arc lamp has been observed by examining the ratios of absolute elemental densities as a function of position. As the elemental densities have been obtained directly by x-ray