title: Single-shot microscopic electron imaging of intense femtosecond laser-produced plasmas.
abstract: A simple technique for single-shot microscopic electron imaging was demonstrated for the study of intense femtosecond laser-produced plasmas. Passed through a permanent magnet lens designed for 110-keV electrons, hot electrons emitted from the plasma produced by a single laser pulse of 0.8 mJ with intensity of 3 × 10(16) W/cm(2) were successfully imaged. Analyzing this image, we found that electrons were emitted from an area of 3 μm in diameter. At higher laser intensity of 10(18) W/cm(2), distinct structures were observed in and near the focal spot of the laser; that is, the electrons were emitted from several separate spots. These results show that laser-plasma electron imaging is promising for studying the interactions of femtosecond lasers with high-density plasmas.
authors.affiliation: Department of Physics, Graduate School of Science, Kyoto University Kitashirakawa, Sakyo, Kyoto 606-8502, Japan. sinoue@laser.kuicr.kyoto-u.ac.jp
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Inoue
authors.forename: Shigeki
authors.initials: S
authors.lastname: Tokita
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Nishoji
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Masuno
authors.forename: Kazuto
authors.initials: K
authors.lastname: Otani
authors.forename: Masaki
authors.initials: M
authors.lastname: Hashida
authors.forename: Shuji
authors.initials: S
authors.lastname: Sakabe