Cryogenic plasma in a helium glow dischage. Determination of the excitation constant for the He 2/sup 3/S level

Journal Article · Sun Nov 01 04:00:00 EST 1981 · High Temp. (Engl. Transl.); (United States)

OSTI ID:6685441

Aktershev, S P; Kirillin, A V; Rakovets, A A

A glow discharge has been run in helium at 260--2600 Pa and currents up to 5 mA with the walls of the discharge tube cooled with liquid nitrogen. Measurements have been made of the populations of the metastable and upper excited states, and also of the concentration of the metastable molecules He/sub 2/(2/sup 3/..sigma../sub u//sup +/). The temperature of the neutral gas at the axis of the discharge has been determined from the Doppler broadening of the singlet lines. The voltage-current characteristics of the positive column give the electron concentration in the discharge. The balance equations for He(2/sup 3/S) give the rate constant for the exitation from the ground state to the metastable state for E/N in the range (1.5--12) x 10/sup -17/ V x cm/sup 2/. Experimental results are compared with theoretical calculations made by others.

• Research Organization: High-Temperature Institute, Academy of Sciences of the USSR
• OSTI ID: 6685441
• Journal Information: High Temp. (Engl. Transl.); (United States), Journal Name: High Temp. (Engl. Transl.); (United States) Vol. 19:3; ISSN HITEA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700104* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Experimental-- (-1987)
COLD PLASMA
CORRELATIONS
CURRENTS
DATA
DOPPLER BROADENING
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRICAL PROPERTIES
ELECTRON DENSITY
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
GASES
GLOW DISCHARGES
GROUND STATES
HELIUM
INFORMATION
LINE BROADENING
LIQUIDS
LOW PRESSURE
LOW TEMPERATURE
METASTABLE STATES
NITROGEN
NONMETALS
NUMERICAL DATA
PHYSICAL PROPERTIES
PLASMA
POSITIVE COLUMN
RARE GASES
TEMPERATURE MEASUREMENT
THEORETICAL DATA