Electromagnetic Instability in a Quadrupole-Focus Accelerator,

Abstract

The addition of helical focusing to a modified betatron configuration is shown to give rise to an electromagnetic instability under certain conditions. The instability arises from a three-wave coupling between the helical field, a transverse mode on the beam, and a transverse-electric waveguide mode. An analytic dispersion relation is derived. Several features of the instability are confirmed using three-dimensional computer simulations. Keywords: High current betatrons; Quadrupole focusing; Three-wave interaction.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1985
Accession Number
ADA163206

Entities

People

  • Brendan B. Godfrey
  • Thomas P. Hughes

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Agreements
  • California
  • Classification
  • Coordinate Systems
  • Dispersion Relations
  • Electrons
  • Equations
  • Free Electrons
  • Frequency
  • Geometry
  • Magnetic Fields
  • Military Research
  • Security
  • Simulations
  • Three Dimensional
  • United States
  • United States Government

Fields of Study

  • Physics

Readers

  • Plasma Physics / Magnetohydrodynamics