量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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Laser wakefield acceleration has been well recognized as a compact advanced acceleration regime with extremely high acceleration gradient. For the application concerns, the temporal information of the electron bunches from laser wakefield acceleration is of great importance. For single shot monitoring of such a parameter, we introduced the electro-optic spatial decoding technique to the research of laser wakefield acceleration. Interesting phenomena were observed when detecting the Coulomb field of the electron bunch at a position very close to the plasma source. The relative timings of electron bunches were detected for various plasma densities and physics behind were investigated. Temporal multi-bunch structures were observed. The smearing process of the electro-optic spatial decoding was detailly discussed. Our research demonstrated the capability of electro-optic sampling technique as a single-shot electron temporal monitor for laser plasma acceleration studies.
レーザー航跡場加速における電気光学サンプリングによる非破壊単発電子タイミング診断
