Accession Number:

AD0766654

Title:

Electron Density Measurements at High Pressures,

Descriptive Note:

Corporate Author:

ADVANCED TECHNOLOGY CENTER INC DALLAS TEX

Personal Author(s):

Report Date:

1973-06-01

Pagination or Media Count:

32.0

Abstract:

Measurements of the electron density in the flow produced by high velocity shock waves in air at initial pressures of 5 torr and 10 torr have been performed in an electromagnetic shock tube. The current collected by flush-mounted probes mounted in the wall of a rectangular cross section shock tube were used to deduce the electron density. Measurements were performed where the probes were biased to collect either ion current or electron current, and a simple theory was used to describe the probe characteristics. The flow conditions surrounding the probe were computed with engineering approximations of the wall boundary layer. A comparison of the measured results and the predicted values agree within a factor of two. Additional measurements of the current collected by a stagnation point electrostatic probe were also performed. Using simple theories, the measured electron density agrees with theoretical predictions within a factor of three. Author

Subject Categories:

  • Atmospheric Physics
  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE