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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Recently, monoenergetic electron beams are obtained with intense, short-pulse laser interacting with tenuous (underdense), a few centimeters plasma via laser wakefield acceleration (LWFA) mechanism. Almost all the experiments utilize relatively long focal length focusing devices, of which the F-numbers (ratio of the focal length to the laser diameter) more than 10. We investigated experimentally highly nonlinear regime. The nonlinear regime is not well explored recently and the benefits of the nonlinear regime might be its high gradient and a capability to accelerate high current electrons.
Detection and Characterization of GeV-class electrons from nonlinear laser wakefield
