Simulations of Intense Relativistic Electron Beam Generation by Foilless Diodes

Abstract

Foilless diodes used to produce intense annular relativistic electron beams have been simulated using the time-dependent, two-dimensional particle-in-cell code CCUBE. Current densities exceeding 200 kA/cm2 have been obtained in the simulations for a 5 MeV, 35 omega diode. Many applications, including microwave generation, collective ion acceleration and high-density plasma heating require a laminar electron flow in the beams. The simulation results indicate that foilless diodes immersed in a strong external magnetic field can achieve such a flow. Diodes using technologically achievable magnetic field strengths (~100 kG) and proper electrode shaping appear to be able to produce beams with an angular scatter of less than 35 mrad at the current densities and energies mentioned above. Scaling of the impedance and temperature of the beam as a function of geometry, magnetic field strength and voltage is presented.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1979
Accession Number
ADA636455

Entities

People

  • Lester E. Thode
  • Michael E Jones

Organizations

  • Los Alamos National Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Angular Momentum
  • Current Density
  • Demographic Cohorts
  • Electron Beams
  • Electrons
  • Energy
  • Equations
  • Flow
  • Impedance
  • Laminar Flow
  • Magnetic Fields
  • Particle Beams
  • Particles
  • Simulations
  • Space Charge
  • Steady State
  • Transmission Lines

Fields of Study

  • Physics

Readers

  • Integrated Circuit Design and Technology.
  • Plasma Physics / Magnetohydrodynamics
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Directed Energy
  • Microelectronics