Accession Number:

AD0292797

Title:

OBSERVATIONS OF COLLECTIVE PHENOMENA IN PLASMAS

Descriptive Note:

Corporate Author:

STANFORD UNIV CALIF STANFORD ELECTRONICS LABS

Personal Author(s):

Report Date:

1962-10-01

Pagination or Media Count:

1.0

Abstract:

The objective of this research was to find experimental evidence of an anomalous resistance in plasmas. Anomalous resistance results when collective action by electrons causes randomization of the growing oscillations in the two-stream instability. This sequence of events leading to dissipation of energy was predicted several years ago by Buneman. It is believed that this objective was achieved i.e., that anomalous resistance is evidenced by observations to be reported here, on a high density plasma subjected to r-f fields by a cavity resonant at a frequency well below the plasma frequency. With sufficient r-f power and density, the two-stream instability should be excited to turbulence level during each halfcycle, causing irreversible power loss. Calculations enumerating the necessary conditions for observing the phenomena were made, showing that the resistance can easily be seen above the intrinsic cavity loss using very moderate amounts of power. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE