| アイテムタイプ |
会議発表論文 / Conference Paper(1) |
| 公開日 |
2025-11-04 |
| タイトル |
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|
タイトル |
Beam halo losses reduction with simulation constrained Bayesian Optimization |
|
言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_5794 |
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資源タイプ |
conference paper |
| アクセス権 |
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|
アクセス権 |
metadata only access |
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アクセス権URI |
http://purl.org/coar/access_right/c_14cb |
| 著者 |
Hyun Jibong
Andrea De Franco
Akagi Tomoya
Hirosawa Koki
Kondo Keitaro
Masuda Kai
Mizuno Akihiko
Carin Yann
Fabio Cismondi
Francesco Scantamburlo
Gex Dominique
Herve Dzitko
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| 抄録 |
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内容記述タイプ |
Abstract |
|
内容記述 |
The Linear IFMIF Prototype Accelerator (LIPAc) is designedto demonstrate continuous wave (CW) accelerationof a 125 mA deuteron beam up to 9 MeV using a radiofrequencyquadrupole (RFQ) and a superconducting radiofrequency(SRF) linac. Prior to SRF linac installation, beamcommissioning was conducted with a 5 MeV deuteron beam.Attempts to increase the duty cycle revealed a significant risein vacuum pressure, as detected by sensors, thus limitingthe operational duty cycle to about 3%. Simulation studiesindicated that the pressure increase was likely attributable tobeam halo formation. To address this issue, Bayesian optimizationwas applied to the beam optics—specifically, fourquadrupole magnets and four steerers—with the objectiveof minimizing halo-induced losses by monitoring vacuumpressure while constraining core beam losses. This approachsuccessfully reduced the sector vacuum pressure by approximately67%. Further simulations verified that beam haloformation driven by nonlinear space-charge forces was effectivelymitigated by relaxing beam focusing in specificregions, consistent with theoretical predictions. As a result,the duty cycle was increased to 8.7%. These findings demonstratethat machine learning techniques, such as Bayesianoptimization, can effectively support beam optics tuningin high-current accelerator systems. This paper presents acomparative analysis of the beam optics before and afteroptimization, highlighting the improvements in halo suppression. |
| 書誌情報 |
Proceedings of the 71st ICFA Adv. Beam Dyn. Workshop High-Intensity High-Bright. Hadron Beams
p. 110-115,
発行日 2025-11
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| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
2673-5571 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.18429/JACoW-HB2025-WEIBC01 |
