Numerical analysis of primary electrons in a tandem-type negative ion source

K. Katoh, N. Takado, Akiyoshi Hatayama, M. Hanada, T. Seki, T. Inoue

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

To clarify the physical mechanism of the plasma spatial nonuniformity observed in tandem-type negative-ion sources, the primary electron-transport process has been analyzed by a three-dimensional Monte Carlo simulation code. In the model, equations of motion for electrons are numerically solved. The realistic geometry and magnetic-field configuration are taken into account. Various collision processes with neutral particles are also included in the model. The simulation results show that (1) the primary electrons have been lost from the source region to the extraction region due to the magnetic drift in the filter magnetic region and (2) the magnetic drift velocities have opposite directions near the sidewalls. The effect of the magnetic drift is one of the possible causes to explain the spatial nonuniformity observed in the experiment.

Original languageEnglish
Article number03A535
JournalReview of Scientific Instruments
Volume77
Issue number3
DOIs
Publication statusPublished - 2006 Mar

Fingerprint

Ion sources
negative ions
ion sources
numerical analysis
Numerical analysis
Negative ions
Magnetic filters
nonuniformity
Electrons
Equations of motion
magnetic field configurations
electrons
neutral particles
Magnetic fields
Plasmas
Geometry
equations of motion
simulation
filters
collisions

ASJC Scopus subject areas

  • Instrumentation
  • Physics and Astronomy (miscellaneous)

Cite this

Katoh, K., Takado, N., Hatayama, A., Hanada, M., Seki, T., & Inoue, T. (2006). Numerical analysis of primary electrons in a tandem-type negative ion source. Review of Scientific Instruments, 77(3), [03A535]. https://doi.org/10.1063/1.2171755

Numerical analysis of primary electrons in a tandem-type negative ion source. / Katoh, K.; Takado, N.; Hatayama, Akiyoshi; Hanada, M.; Seki, T.; Inoue, T.

In: Review of Scientific Instruments, Vol. 77, No. 3, 03A535, 03.2006.

Research output: Contribution to journalArticle

Katoh, K, Takado, N, Hatayama, A, Hanada, M, Seki, T & Inoue, T 2006, 'Numerical analysis of primary electrons in a tandem-type negative ion source', Review of Scientific Instruments, vol. 77, no. 3, 03A535. https://doi.org/10.1063/1.2171755
Katoh, K. ; Takado, N. ; Hatayama, Akiyoshi ; Hanada, M. ; Seki, T. ; Inoue, T. / Numerical analysis of primary electrons in a tandem-type negative ion source. In: Review of Scientific Instruments. 2006 ; Vol. 77, No. 3.
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