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Fukumasa Osamu

Affiliate Master Yamaguchi University

Two-dimensional particle simulation of negative ion extraction from a volume source

Fusion engineering and design Volume 26 Issue 1-4 Page 523-528
published_at 1995
Title
Two-dimensional particle simulation of negative ion extraction from a volume source
Creators Naitou Hiroshi
Creators Fukumasa Osamu
Creators Sakachou Kouji
Creators Mutou Kouji
Two-dimensional electrostatic particle simulation was done to study the extraction of negative ions from a volume plasma source. The simulation model is a rectangular system which consists of an extraction grid, a plasma grid, and a grounded wall. Full dynamics of electrons, ions, and negative ions are followed. Negative ions are extracted from the plasma region to the extraction grid through a slit in the plasma grid. for the lower value of extraction grid potential, the simulation results agree with the Child-Langmuir law, where the extracted negative ion current is proportional to the three-halves power of the potential of the extraction grid. For the higher value of extraction grid potential, the space charge effect of negative ions, which enter into the beamline at the top of the concavity of the positive ion boundary, reduces the negative ion current from the prediction of the Child-Langmuir law.
Languages eng
Resource Type journal article
Publishers Elsevier
Date Issued 1995
File Version Not Applicable (or Unknown)
Access Rights metadata only access
Relations
[ISSN]0920-3796
[NCID]AA10691446
info:doi/10.1016/0920-3796(94)00219-W
[isVersionOf] [URI]http://www.sciencedirect.com/science/journal/09203796
Schools 大学院理工学研究科(工学)