Accession Number:

ADA162543

Title:

Observations of Sub-LF Electromagnetic Field Phenomena Associated with Modulated Electron Beams on STS-3.

Descriptive Note:

Final technical rept. Apr 83-Mar 84,

Corporate Author:

STANFORD UNIV CA SPACE TELECOMMUNICATIONS AND RADIOSCIENCE LAB

Report Date:

1985-08-01

Pagination or Media Count:

36.0

Abstract:

This report provides initial documentation of some of the sub-LF frequencies less than 30kHz electromagnetic field phenomena observed during the first active electron beamspace plasma experiment on a Space Shuttle orbiter. The experiment took place in March 1982 as part of the third flight of an orbiter, and it was notable for its particularly complete instrumentation for plasma and electromagnetic wave diagnostic measurements. A number of anomalous electric and magnetic field phenomena are observed during the electron beam modulation experiments, including the generation of noise bands, extra harmonics, and a variety of side frequencies. In addition, discrete ELF tones are observed during some of the dc electron beam pulse sequences, and there are peculiarities in the harmonic structure of the electromagnetic fields produced during lower-ELF modulation of the electron beam. Studies of these effects are continuing. Keywords Electron beam Space shuttle Space plasma Beam plasma interactions Ultralow frequency Extremely low frequency and Very low frequency.

Subject Categories:

  • Atmospheric Physics
  • Test Facilities, Equipment and Methods
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE