Accession Number:

AD0655934

Title:

DETERMINATION OF DEPARTURES FROM LOCAL THERMODYNAMIC EQUILIBRIUM IN ARC PLASMAS.

Descriptive Note:

Final technical rept.,

Corporate Author:

PLASMA SCIENCES LABS INC VAN NUYS CALIF

Personal Author(s):

Report Date:

1967-03-01

Pagination or Media Count:

102.0

Abstract:

The concept of local thermodynamic equilibrium was investigated both theoretically and experimentally. Equilibrium characteristic curves were constructed from absolute spectral intensities of the several species of radiation emitted by the free-burning argon arc plasma. Measurements were made over the pressure range 0.1 or P or 1.1 atm. Complete local thermal equilibrium, in the sense that electrons and heavy particles have the same temperature, was observed for pressures above 0.3 atm. Transition probabilities measured in the course of the investigation were compared with those available in the literature. This comparison shows disagreement among investigators regarding the state of equilibrium existing even in the 1 atm plasma. Author

Subject Categories:

  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE