SPACE CHARGE WAVES IN AN ELECTRON BEAM OF GAUSSIAN CROSS SECTION AND THE INTEGRAL EQUATION OF TRAVELING WAVE TUBES WITH ELECTRON BEAMS/OF ARBITRARY CROSS SECTION
Abstract
For reference only at each of the ASTIA offices. This report cannot be satisfactorily reproduced; ASTIA does not furnish copi s. DESCRIPTORS: (*Phonons, Electrons, Metals, Lead, Sodium.) Identifiers: Fermi surface. Some semi- uantitative estimates of the actual magnitude of image effects are presented. The phonon spectrum, including image ffects, is calculated using a model of ions immersed in and screened by a uniform electron gas. The magnitude of the calculated image effects (of the ord r of a few percent) is comparable to those observed in lead. This model is refined to take into account the Bloch character of the electron wave functions. U ing assumptions believed to be valid for certain metals, including sodium and aluminum, it is found that this refinement reduces the image effects by a remarkably large factor, of order 0.01. A SECOND, BUT CLOSELY RELATED, IMAGE EFFECT IS DISCUSSED. A phonon can decay with the generation of an electron-hole pair. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1960
- Accession Number
- AD0271888
Entities
People
- M.h. Fischer
- O.e.h. Rydbeck
Organizations
- Chalmers University of Technology