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ID 20751
本文ファイル
著者
Takai, Ryota
Nakayama, Kenji
Saiki, Wataru
Ito, Kiyokazu
キーワード
nonlinear resonance
one-component plasma
linear Paul trap
space charge effect
charged particle beam
NDC
物理学
抄録(英)
The effects of nonlinear resonances in a linear Paul trap have been investigated through systematic experiments and numerical simulations. The main causes of the nonlinearity that affects the stability of the ion motion are the use of circular (rather than hyperbolic) electrodes, their misalignments, and Coulomb interactions among the ions. A particle tracking code based on a two-dimensional model is employed to study the efficiency of plasma storage and to confirm the existence of nonlinear resonance stop bands. Experiments are performed with Ar+ plasmas that are eventually detected by a Faraday cup after a short storage. The obtained data are compared with numerical simulations in which the exact three-dimensional structure of the trap system has been incorporated. Several nonlinear stop bands have been experimentally identified inside the Mathieu stability region. It is demonstrated that the location of a resonance stop band moves due to the space-charge potential depending on the number of confined ions.
掲載誌名
Journal of the Physical Society of Japan
76巻
1号
開始ページ
014802-1
終了ページ
014802-8
出版年月日
2007-01-15
出版者
日本物理学会
ISSN
0031-9015
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2007 The Physical Society of Japan
関連情報URL
部局名
先端物質科学研究科