Analysis of the beam halo in negative ion sources by using 3D3V PIC code

K. Miyamoto, S. Nishioka, I. Goto, A. Hatayama, M. Hanada, A. Kojima, J. Hiratsuka

研究成果: Article査読

10 被引用数 (Scopus)

抄録

The physical mechanism of the formation of the negative ion beam halo and the heat loads of the multi-stage acceleration grids are investigated with the 3D PIC (particle in cell) simulation. The following physical mechanism of the beam halo formation is verified: The beam core and the halo consist of the negative ions extracted from the center and the periphery of the meniscus, respectively. This difference of negative ion extraction location results in a geometrical aberration. Furthermore, it is shown that the heat loads on the first acceleration grid and the second acceleration grid are quantitatively improved compared with those for the 2D PIC simulation result.

本文言語English
論文番号02B124
ジャーナルReview of Scientific Instruments
87
2
DOI
出版ステータスPublished - 2016 2月 1

ASJC Scopus subject areas

  • 器械工学

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