Numerical investigation of time-dependent electrode-plasma interaction in commercial HID lamps

High-intensity discharge (HID) lamps capture more and more the markets for automotive headlight lamps (D2 lamp), video projection (UHP lamp), street/industrial lighting, floodlighting, etc. They are normally very small (typically 0.7-10 mm electrode gap) and have short time scales, leading to diffic...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2005-04, Vol.33 (2), p.508-509
Main Authors: Flesch, P., Neiger, M.
Format: Article
Language:English
Subjects:
Anode
Anodes
cathode
Cathodes
Computer simulation
Electrodes
High intensity discharge lamps
high-pressure discharge
lamp
Lamps
Lighting
Markets
Mathematical models
non-local thermal equilibrium (LTE)
Plasma
Plasma applications
Plasma density
Plasma properties
Plasma simulation
Plasma temperature
Simulation
Thermal conductivity
time dependent simulations
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Summary:High-intensity discharge (HID) lamps capture more and more the markets for automotive headlight lamps (D2 lamp), video projection (UHP lamp), street/industrial lighting, floodlighting, etc. They are normally very small (typically 0.7-10 mm electrode gap) and have short time scales, leading to difficulties during experimental investigations. Thus, numerical simulations of HID lamps are an important tool to understand, improve, and develop new HID lamps. Especially the interaction between electrodes and plasma is a very localized and fast process, still not understood satisfactorily. Lamps are usually operated on alternating current (ac); the electrodes switch alternately from anode to cathode phase. Therefore, time dependent simulations that include realistic anode and cathode models are essential. We present a model having the ability to address all these challenges.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2005.845073