Accession Number:

AD0731210

Title:

A Capacitance Electron Density Probe.

Descriptive Note:

Research and development technical rept.,

Corporate Author:

ATMOSPHERIC SCIENCES LAB WHITE SANDS MISSILE RANGE N MEX

Report Date:

1971-06-01

Pagination or Media Count:

37.0

Abstract:

The design and operational characteristics of a rocket-borne. radio-frequency capacitance probe for obtaining electron densities in the 60-100 km altitude range are described. The design objective was to provide a simple, inexpensive system suitable for synoptic measurements of electron density. Basically the probe consists of a coaxial capacitor which is exposed to the atmosphere. This capacitor is the frequency control element of a 5MHz oscillator. As the dielectric constant is a function of the electron density within the capacitor dielectric, the oscillator frequency changes are related to electron density. A simple procedure, which ignored sheath effects, was used to calibrate the probes. Despite this calibration deficiency, electron densities derived from data obtained during two test flights were reasonable and agreed with results obtained from other experiments in this altitude region. Author

Subject Categories:

  • Atmospheric Physics
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE