Negative glow discharges for lighting

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:419757

Kudryavtsev, A A; Lasaryuk, S N ^[1]; Sheverev, V A ^[2]

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1. Saint-Petersburg Univ. (Russian Federation)
2. Polytechnic Univ., Brooklyn, NY (United States)

Results of experimental and theoretical studies of negative glow (NG) discharge devices with original electrode configurations are reported. For the conventional low pressure discharge, the radiation intensity of the negative glow is several times greater than that of the positive column because most of the energy supplied to the NG is converted to excitation and ionization of gas particles. However, applications of NG plasmas have been impaired by the practical difficulty of obtaining extended NG. For laser-pumping, extended negative glow plasmas has been achieved with electrode constructions called hollow cathodes (HC). They can be described as discharge devices in which the cathode surrounds a volume of space, forming a cavity. The anode is placed so that the minimal distance between the cathode and the anode, d, conforms to the condition of hindered discharge. Extended NG plasmas are formed in the space surrounded by the cathode, and no positive column develops. In contrast to various kinds of HC, electrode configurations where an extended NG plasma is formed outside the electrodes are presented. A self-sustained kinetic model of the discharges is developed. Predicted electrical and spectroscopic characteristics of the discharge plasmas are compared with experimental measurements.

• OSTI ID: 419757
• Report Number(s): CONF-960634--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
COMPARATIVE EVALUATIONS
ELECTRICAL PROPERTIES
FLUORESCENT LAMPS
GLOW DISCHARGES
PLASMA DIAGNOSTICS
PLASMA SIMULATION