Accession Number:

AD0765909

Title:

Ion Saturation Currents to Planar Langmuir Probes in a Collision-Dominated Flowing Plasma,

Descriptive Note:

Corporate Author:

VICTORIA UNIV (BRITISH COLUMBIA) DEPT OF PHYSICS

Personal Author(s):

Report Date:

1972-08-03

Pagination or Media Count:

12.0

Abstract:

The transition between diffusive saturated current and sheath-convection behavior of the current to a negative probe in a high-pressure, flowing plasma has been studied theoretically. By using two physical models, where both effects are considered to be significant, one effect being dominant in one case and the other being dominant in the other case, an approximate relation is derived for the probe current in the transition between these two regimes. This transition is found to cover a variation of two orders of magnitude in ionization density if the required 10 accuracy is to be achieved. It is also found that thermoelectric and nonequilibrium effects due to cooling in the thermal boundary layer do not themselves materially affect the diffusion current. Author

Subject Categories:

  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE