ION EFFECTS IN A BRILLOUIN BEAM
Abstract
The effects are described of ion neutralization of the space charge in a Brillouin beam noted while making dc and rf current measurements with an electron beam analyzer. Ion neutralization made the beam behavior depart from the ideal Brillouin behavior, resulting in a difference between theory and experiment. As ion neutralization was reduced, the experimental observations approached the theoretical predictions more closely. Ion neutralization was observed by injecting gas into the beam analyzer, on which the measurements were made, and observing the change in beam shape by measuring the current density at various points in the beam on an oscilloscope and an x-y recorder. The beam shape changed during the cathode pulse, indicating a build-up of ions, the rate of ion formation being a linear function of time during the pulse and varying with pressure. The presence and formation of ions in the beam seemed to increase the degree of nonliminarity of flow.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 20, 1962
- Accession Number
- AD0407268
Entities
People
- A. S. Gilmour
- D. D. Hallock
Organizations
- Cornell University