Determination of the partial pressure of thallium in high-pressure lamp arcs: A comparative study

Journal Article · Fri Aug 01 04:00:00 EDT 1986 · IEEE Trans. Plasma Sci.; (United States)

DOI:https://doi.org/10.1109/TPS.1986.4316558· OSTI ID:5340848

Karabourniotis, D; Couris, S; Damelincourt, J J; Aubes, M

The partial pressure of thallium in high-pressure Hg-TlI discharges with different mercury, thallium, and electron pressures has been measured by using the optically thin line Tl 655 nm and the self-reversed line Tl 535 nm. The partial pressure of the arc axis has been measured from the line Tl 655nm. The effective partial pressure has been measured from the self-reversed line Tl 535 nm on the basis of the multiparameter method, and it has been calculated from the known axis pressure of thallium and the calculation of its radial variation by taking into account the chemical reactions. The experimental results confirm the dispersion character of the blue wing of the line Tl 535 nm. The systematic difference obtained between the measured and calculated effective pressure, particularly at the moment of minimum electron density, may be interpreted by deviations from the local thermodynamic equilibrium (LTE) caused by overpopulation of the upper level of the line Tl 535 nm.

• Research Organization: Physics Dept., Univ. of Crete, Iraklion, Crete
• OSTI ID: 5340848
• Journal Information: IEEE Trans. Plasma Sci.; (United States), Journal Name: IEEE Trans. Plasma Sci.; (United States) Vol. PS-14:4; ISSN ITPSB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
42 ENGINEERING
420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)
CALCULATION METHODS
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CURRENTS
ELECTRIC ARCS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRON DENSITY
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EQUILIBRIUM
FERMIONS
LEPTONS
LIGHT BULBS
MERCURY
METALS
PARTIAL PRESSURE
THALLIUM
THERMAL EQUILIBRIUM
THERMODYNAMICS