Atomic gas temperature in a nonequilibrium high-intensity discharge lamp determined from the red wing of the resonance mercury line 254 nm

Journal Article · Sat Sep 01 00:00:00 EDT 2012 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4747928· OSTI ID:22089423

Drakakis, E. ^[1]; Karabourniotis, D. ^[2]

---

1. Technological Educational Institute, Department of Electrical Engineering, 71004 Heraklion (Greece)
2. Institute of Plasma Physics, Department of Physics, University of Crete, 71003 Heraklion (Greece)

For developing low-wattage high intensity discharge (HID) lamps, a better understanding of the relatively unexplored nonequilibrium phenomena is essential. This needs interpretation of diagnostic results by methods free from equilibrium assumptions. In this paper, the atomic temperature is determined from the simulation of a quasistatic broadened resonance line by distinguishing between atomic temperature and excitation temperature in the equation of radiative transfer. The proposed method is applied to the red wing of the resonance mercury line 254 nm emitted from a HID lamp working on ac. The experimental results show severe deviation from local thermodynamic equilibrium. More than one thousand degrees difference was obtained between atomic and electron temperatures at the maximum current phase.

• OSTI ID: 22089423
• Journal Information: Journal of Applied Physics, Vol. 112, Issue 5; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRIC DISCHARGES
ELECTRON TEMPERATURE
EXCITATION
ION TEMPERATURE
LINE BROADENING
LTE
MERCURY
PLASMA SIMULATION
POWER INPUT
RADIANT HEAT TRANSFER
RESONANCE
SPECTRA
VAPORS