title: Electron acceleration by a nonlinear wakefield generated by ultrashort (23-fs) high-peak-power laser pulses in plasma.
abstract: We study experimentally the interaction of the shortest at present (23-fs) , relativistically intense (20-TW), tightly focused laser pulses with underdense plasma. MeV electrons constitute a two-temperature distribution due to different plasma wave-breaking processes at a plasma density of 10(20) cm(-3). These two groups of electrons are shown numerically to constitute bunches with very distinctive time durations.
authors.affiliation: Advanced Photon Research Center, Kansai Research Establishment, Japan Atomic Energy Research Institute, 8-1 Umemidai, Kizu, Souraku, Kyoto 619-0215, Japan. kando@apr.jaeri.go.jp
authors.forename: M
authors.initials: M
authors.lastname: Kando
authors.forename: S
authors.initials: S
authors.lastname: Masuda
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authors.initials: A
authors.lastname: Zhidkov
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authors.initials: A
authors.lastname: Yamazaki
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authors.lastname: Kotaki
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authors.lastname: Kondo
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authors.lastname: Homma
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authors.lastname: Kanazawa
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authors.lastname: Nakajima
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authors.lastname: Hayashi
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authors.lastname: Mori
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authors.lastname: Kiriyama
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authors.lastname: Akahane
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authors.lastname: Inoue
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authors.lastname: Ueda
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authors.lastname: Nakai
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authors.lastname: Tsuji
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authors.lastname: Yamamoto
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authors.lastname: Yamakawa
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authors.lastname: Koga
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authors.lastname: Hosokai
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authors.lastname: Uesaka
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authors.initials: T
authors.lastname: Tajima