| Project/Area Number |
24651096
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Quantum beam science
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| Research Institution | Tohoku University |
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Principal Investigator |
HAMA Hiroyuki 東北大学, 電子光理学研究センター, 教授 (70198795)
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| Co-Investigator(Kenkyū-buntansha) |
HARA Toru 独立行政法人理化学研究所, 先端ビームチーム, チームリーダー (00280727)
TOGAWA Kazuaki 独立行政法人理化学研究所, 先端ビームチーム, 先任研究員 (00342816)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 低エネルギー電子ビーム / 縦方向位相空間 / チェレンコフ光 / 縦方向位相空間分布 / マイクロバンチング不安定性 / 非線形反射鏡 / 4f収束システム / 高輝度入射器 |
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| Outline of Final Research Achievements |
Based on momentum dependence of Cherenkov opening angle, we have proposed a novel diagnostic system for direct observation of longitudinal phase space distribution of low energy electron beam. A specially designed "Turtle-back Mirror" confines the Cherenkov light onto a focal line, and the longitudinal phase space can be obtained by taking a temporal information together. We have examined the system resolution by numerical ray-trace simulation for whole optical system, and a momentum resolution of 1.15 keV/c and a temporal resolution of 0.74 ps were found out for the complete optics. Meanwhile a test piece of Turtle-Back Mirror was manufactured, and we investigated the performance of it. Although the overall shape of the non-linear surface satisfied the requirement, the surface roughness was really unsatisfactory for better resolutions. Further improvement of the mirror surface is required.
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