2023 Fiscal Year Final Research Report
Realization of the ideal bunch lengthening by compensating for transient beam loading in the next-generation light sources.
| Project/Area Number |
21K17997
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 80040:Quantum beam science-related
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| Research Institution | High Energy Accelerator Research Organization |
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Principal Investigator |
Naito Daichi 大学共同利用機関法人高エネルギー加速器研究機構, 加速器研究施設, 助教 (30788237)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 極低エミッタンス光源 / 過渡的電圧変動 / 広帯域空洞 |
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| Outline of Final Research Achievements |
In the next generation of synchrotron light sources, bunch lengthening is essential to achieve ultra-low-emittance and the transient beam-loading effect should be compensated by the wide-band kicker cavity.
We optimized and proposed the design of the kicker cavity using 3D electromagnetic simulation at first in the world. To confirm the performance of the kicker cavity, we manufactured the low-power model of the cavity and evaluated its performance. By measuring the RF properties, we confirmed that the bandwidth of the kicker cavity met the requirement. We also confirmed that high order mods were sufficiently damped by the RF absorber. From above results, we successfully established the design of the wide-band kicker cavity.
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| Free Research Field |
加速器、加速空洞、LLRF、電源
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| Academic Significance and Societal Importance of the Research Achievements |
過渡的電圧補償が重要である事は世界の共通認識であったが、実際に次世代光源の建設計画がある施設では建設に追われており、我々の研究グループ以外に具体的な検討を進めているグループはあまり無かった。現在は次世代光源の建設が終わり、過渡的電圧補償の具体的検討を始めた施設が出てきている。このような状況で申請者が過渡的電圧補償が可能なハードウェアを提唱した意義は非常に大きく、これらの施設で申請者が考案した補償空洞が採用される可能性がある。また申請者は具体的なデザイン決定のプロセスを国際学会で発表しており、この成果はこれから各施設が検討を進める上で大きな助けとなる。
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