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ID 18633
本文ファイル
著者
Ikegami, Masanori
抄録(英)
We study halo formation from cylindrical beams propagating in a uniform focusing channel. Of particular interest here are the breathing-mode oscillations excited by an initial beam-size mismatch. We develop a one-dimensional space-charge code which is simple but powerful in exploring the halo properties of breathing beams. After giving a brief description of two particle-core models, we apply the developed code to three different types of nonlinear phase-space distributions. Based on a number of multiparticle simulation runs, we show several interesting results useful for the design considerations of high-power linear machines. In particular, the intensity of halo current as well as the maximum extent of halos are self-consistently evaluated with the different sizes of initial mismatch and beam density. We then find that the halo extent normalized with the initial root-mean-squared beam size is only weakly dependent on the tune depression and that the halo intensity appears to increase with the degree of mismatch. It is further demonstrated that the beam core in phase space is roughly stable and, thus, most halo particles remain outside the core boundary. We also see that it is, in principle, possible to scrape halos, e.g., by means of a multicollimator system.
掲載誌名
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
55巻
4号
開始ページ
4694
終了ページ
4705
出版年月日
1997-04
出版者
American Physical Society
ISSN
1539-3755
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
publisher
権利情報
Copyright (c) 1997 American Physical Society.
関連情報URL
部局名
先端物質科学研究科