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Conductivity of cesium-seeded atmospheric pressure plasmas near thermal equilibrium

Abstract

Measurements were made of the electric conductivities of gaseous mixtures formed by the addition of small fractions of cesium vapor to nitrogen, helium, neon, or argon. The mixtures studied were maintained near thermal equilibrium at temperatures in the 1500 to 2000 deg K range and a total pressure of 1 atm. The cesium vapor pressures ranged over two decades, from 0.1 to 10 torr. The apparatus consists, in essence, of two heated zones connected by a slow flow. The first zone is a low-temperature (200 to 400 deg C) oven where the body-gas flow picks up the cesium vapor. The second zone is a small electrically heated furnace (1250 to 1850 deg C) containing a diode test section. The principal measurements taken were the seeding temperature, furnace temperature, and voltages and currents in the test section. The results exhibit variations with temperature, seeding pressure, and gas species that correlate reasonably well with simple theory and values for electron collision frequencies and cross sections taken from the literature. (auth)
Authors:
Publication Date:
Apr 15, 1963
Product Type:
Conference
Report Number:
CONF-24-7; GE-63-RL-3278G
Reference Number:
NSA-17-033216
Resource Relation:
Conference: 4. Symposium on Engineering Aspects of Magnetohydrodynamics Symposium, Berkeley, CA (United States), Apr 1963
Subject:
PHYSICS; CESIUM; CROSS SECTIONS; CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRIC POTENTIAL; FURNACES; GAS FLOW; GASES; HEATING; INSTRUMENTS; INTERACTIONS; MEASURED VALUES; MIXING; NITROGEN; PLASMA; PRESSURE; TEMPERATURE; THERMODYNAMICS; VAPORS; VARIATIONS; NEON; HELIUM; ARGON
Sponsoring Organizations:
Sponsor not identified
OSTI ID:
4875584
Research Organizations:
General Electric Research Lab., Schenectady, NY (United States)
Country of Origin:
United States
Language:
English
Submitting Site:
DTIE
Size:
Pages: 24
Announcement Date:
Dec 31, 1963

Citation Formats

Harris, L. P. Conductivity of cesium-seeded atmospheric pressure plasmas near thermal equilibrium. United States: N. p., 1963. Web.
Harris, L. P. Conductivity of cesium-seeded atmospheric pressure plasmas near thermal equilibrium. United States.
Harris, L. P. 1963. "Conductivity of cesium-seeded atmospheric pressure plasmas near thermal equilibrium." United States.
@misc{etde_4875584,
title = {Conductivity of cesium-seeded atmospheric pressure plasmas near thermal equilibrium}
author = {Harris, L. P.}
abstractNote = {Measurements were made of the electric conductivities of gaseous mixtures formed by the addition of small fractions of cesium vapor to nitrogen, helium, neon, or argon. The mixtures studied were maintained near thermal equilibrium at temperatures in the 1500 to 2000 deg K range and a total pressure of 1 atm. The cesium vapor pressures ranged over two decades, from 0.1 to 10 torr. The apparatus consists, in essence, of two heated zones connected by a slow flow. The first zone is a low-temperature (200 to 400 deg C) oven where the body-gas flow picks up the cesium vapor. The second zone is a small electrically heated furnace (1250 to 1850 deg C) containing a diode test section. The principal measurements taken were the seeding temperature, furnace temperature, and voltages and currents in the test section. The results exhibit variations with temperature, seeding pressure, and gas species that correlate reasonably well with simple theory and values for electron collision frequencies and cross sections taken from the literature. (auth)}
place = {United States}
year = {1963}
month = {Apr}
}