Analysis of barium loss from fluorescent lamp electrodes
Conference
·
OSTI ID:63048
- Osram Sylvania Inc., Danvers, MA (United States)
The life of a fluorescent lamp is determined by the life of the coated coil electrode, so factors affecting the loss of electrode emitter material are of great interest to the lamp manufacturers. The authors combined the experimental and theoretical efforts to address this issue. They have developed one-dimensional analytical transport models describing the loss of barium, the key emitter ingredient, from the electrodes. The spatial distributions of neutral barium in the presence and absence of discharges are analyzed. Ionization of barium is accounted for. To make reliable estimations of barium loss, the spatial distributions of both barium density and temperature are required. Experimental measurements using laser absorption and induced fluorescence have provided such spatial information. In this presentation, various aspects of model validation, extraction of transport coefficients and determination of barium loss will be discussed.
- OSTI ID:
- 63048
- Report Number(s):
- CONF-940604--; ISBN 0-7803-2006-9
- Country of Publication:
- United States
- Language:
- English
Similar Records
Barium loss from the electrode of a low pressure Hg-Ar discharge at ignition
Laser-induced fluorescence technique for measuring damage to a fluorescent lamp electrode
Barium atom and ion densities in a fluorescent lamp obtained from measurements and computer simulations
Conference
·
Tue Dec 30 23:00:00 EST 1997
·
OSTI ID:330592
Laser-induced fluorescence technique for measuring damage to a fluorescent lamp electrode
Conference
·
Tue Dec 30 23:00:00 EST 1997
·
OSTI ID:323627
Barium atom and ion densities in a fluorescent lamp obtained from measurements and computer simulations
Conference
·
Fri Dec 30 23:00:00 EST 1994
·
OSTI ID:63045