| Project/Area Number |
23K17152
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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 | National Institutes for Quantum Science and Technology |
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Principal Investigator |
黄 開 国立研究開発法人量子科学技術研究開発機構, 関西光量子科学研究所 光量子ビーム科学研究部, 主任研究員 (30866166)
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| Project Period (FY) |
2023-04-01 – 2025-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2024: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2023: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
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| Keywords | high power laser / accelerator / beam diagnostics / EO sampling / transition radiation / genetic algorithm / 高強度レーザ / 電子加速 / EOサンプリング / 遷移放射 / 3D charge density |
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| Outline of Research at the Start |
The first single-shot measurement of the 3D charge density distribution of the electron bunches from laser wakefield acceleration will be conducted by using a newly designed “TR-EO” technique. The electron transverse and longitudinal profile will be reconstructed from OTR image and EO sampling, simultaneously. This research will have broad impact to studies of accelerator and THz optics.
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| Outline of Annual Research Achievements |
The first single shot measurement of the 3D density profile of the electron bunches from laser wakefield acceleration has been conducted by using the "TR-EO" technique. Both experiments and numerical studies have been carried out. The detailed 3D structure was reconstructed with genetic algorithm. The goal of this proposal has been fully accomplished.
For the experimental aspect: Optical transition radiation (OTR) imaging and electro-optic (EO) sampling were conducted simultaneously, for the transverse and longitudinal measurements of the electron bunch, respectively.
For the theoretical aspect: I have conducted systematic studies on the process of OTR imaging and EO spatial decoding.
Two papers have been published and several oral presentations have been given.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
Due to the experimental experience and numerical effort from my previous KAKENHI No. 21K17998, the experiments and numerical studies of this proposal have been carried out very smoothly. Very detailed numerical studies have been carried out. The calculation code for data analysis has been fully vectorized for the fast processing. Highly advanced experiments have been conducted. The 3D shape of the electron bunch was detected by simultaneously performing optic transition radiation imaging and electro-optic sampling. Detailed 3D structures to few micrometer levels were reconstructed using a genetic algorithm.
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| Strategy for Future Research Activity |
The goal of this proposal has been fully accomplished. Both experimental and numerical studies have been carried out. The results have been published on high-impact professional journals.
However, genetic algorithms were used to solve the inverse problem in the data analysis. It was time consuming. For the next step, I plan to perform machine learning on the whole detection system to speed up the process. In this way, it is possible to realize the real-time electron bunch 3D detection during the laser wakefield acceleration experiment.
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