Theoretical investigation of electron temperature variation across magnetic filter in a negative ion source

Mikito Shirai, Masatada Ogasawara, Takehiko Koishimine, Akiyoshi Hatayama

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Electron temperature variation over the magnetic filter region and the extraction region is investigated theoretically. We assume qx/{(5/2)TΓx}=β between heat flux qx and electron flux Γx, where β is a ratio of the heat flux to the enthalpy flux and T is the electron temperature. Terms of diamagnetic drift in the expressions of the flux and heat flux are important in obtaining temperature T(x) that agrees with Haas et al.'s experimental results. Electron loss along the magnetic field is important in determining the exponential dependence of the electron number density and temperature on y. Flux inversion is attributed to the negative flux due to the electric field.

Original languageEnglish
Pages (from-to)1085-1087
Number of pages3
JournalReview of Scientific Instruments
Volume67
Issue number3
DOIs
Publication statusPublished - 1996 Mar

Keywords

  • ANIONS
  • ELECTRON DENSITY
  • ELECTRON TEMPERATURE
  • ELECTRON−ION COLLISIONS
  • HEAT FLUX
  • ION SOURCES
  • MAGNETIC FILTERS
  • TEMPERATURE DISTRIBUTION

ASJC Scopus subject areas

  • Instrumentation

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