Injection of Electrons into a Toroidal Trap Using Chaotic Orbits Near Magnetic Null

Abstract

A new method of injecting electrons across magnetic field has been studied. The electrons, launched near an X-point of magnetic separatrix, describe chaotic (non-integrable) orbits and are trapped inside the separatrix; probe measurements show several tens volts of the floating potential inside the separatrix. For the production of higher density electron plasmas, a new electron gun with a LaB(exp6) cathode has been developed. The gun generates a floating potential of the order of 10(exp 3) V. The electron density is calculated to be of the order of 10(exp 14)/cu m, which is close to the Brillouin density limit.

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Document Details

Document Type
Technical Report
Publication Date
Jun 24, 2002
Accession Number
ADP012576

Entities

People

  • Chihiro Nakashima
  • Haruhiko Himura
  • Junji Morikawa
  • Masayuki Fukao
  • Zensho Yoshida

Organizations

  • University of Tokyo

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Electron Beams
  • Electron Density
  • Electron Guns
  • Electrons
  • Electrostatic Probes
  • Equations
  • Geometry
  • High Density
  • High Temperature
  • Linear Systems
  • Magnetic Fields
  • Particles
  • Poisson Equation
  • Scientific Research
  • Steady State
  • Technical Information Centers
  • Voltage

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Plasma Physics / Magnetohydrodynamics

Technology Areas

  • Microelectronics
  • Space
  • Space - Hall-Effect Thruster
  • Space - Orbital Debris