The Ion Acoustic Instability in the Helium Positive Column,
Abstract
The theory of ion acoustic instability of the helium positive column in the pressure regime 0.050 to 0.250 Torr is developed, examined, and tested experimentally. Instability of the column is predicted by a kinetic theory which includes the effect of collisions with neutrals, but not by hydrodynamic theory. In the regime of the experiment, the ion acoustic instability is due to the resonant interaction of those electrons with velocities near the phase velocities of the ion acoustic waves (inverse Landau damping) even though the electron-neutral collision frequency exceeds the ion acoustic frequency. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1972
- Accession Number
- AD0745399
Entities
People
- David Bentley Fenneman
Organizations
- University of Illinois Urbana–Champaign