Study of electron longitudinal phase space in laser wakefield acceleration via electro-optic streaking technique
| Project/Area Number |
21K17998
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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 |
Huang Kai 国立研究開発法人量子科学技術研究開発機構, 関西光科学研究所 光量子科学研究部, 主任研究員 (30866166)
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| Project Period (FY) |
2021-04-01 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2022: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2021: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | high power laser / electron accelerator / beam diagnostics / EO sampling / Longitudinal phase space / electron acceleration / longitudinal phase space / electro-optic sampling |
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| Outline of Research at the Start |
The longitudinal phase space (LPS) of an electron bunch, although important, has not been real-time characterized in laser wakefield acceleration due to the lack of single-shot diagnostics. Here, an “electro-optic streaking” technique is newly designed to solve this problem. Such a measurement will be the first time in the study of laser wakefield acceleration. The proposed research will have a wide impact to the studies of laser plasma acceleration and terahertz optics.
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| Outline of Final Research Achievements |
I proposed a brand new electro-optic streaking technique for the single-shot measurement of the electron longitudinal phase space (LPS) in laser wakefield acceleration. A “dog-leg” system composed of two dipole magnet was designed and manufactured. For easier access to the overall self-field information of the electron bunches, the measurement on the transition radiations (TR) from the electron bunches are planned. I have carried out a preliminary experiment to monitor the electron timings outside the plasma. The electron bunches were discovered to have a timing fluctuation of merely 7 fs (rms). This work was published as “K. Huang et al., Applied Physics Express 15, 036001 (2022)” and selected as the spotlight paper of the journal. For the theoretical aspect: I have developed a code covering all the sessions in the LPS. For the next step, I will insert the “dog-leg” into the experimental set-up and measure the LPS of the electron bunch.
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| Academic Significance and Societal Importance of the Research Achievements |
従来の加速器では、電子バンチのLPSは高周波 (RF) Transverse Deflection Structure (TDS)で測定される。しかし、レーザー駆動の粒子加速の場合、フェムト秒の時間スケールで電子バンチを時間的にキックすることが可能なTDSを構築することは困難である。本研究は、LWFAにおける電子ビームダイナミクスの先駆的な研究となる。EO技術の創造的な応用は、中赤外からTHzまでの波長範囲でのEO結晶の分散特性の研究にも有益である。
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Report
(3 results)
Research Products
(12 results)
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[Presentation] Temporal characterizations of electron bunches from laser plasma accelerator2022
Author(s)
KAI HUANG, Kotaki Hideyuki, Mori Michiaki, Esirkepov Timur, James Kevin Koga, Hayashi Yukio, Nakanii Nobuhiko, Kando Masaki, Zhan Jin, Hosokai Tomonao
Organizer
6th Asia-Pacific Conference on Plasma Physics, 2022
Related Report
Int'l Joint Research / Invited
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