会議発表用資料 Analysis of spectra of high-order harmonics from relativistic singularities

ピロジコフ, アレキサンダー  ,  Ogura, Koichi  ,  Timur, Esirkepov  ,  A. Pikuz, T.  ,  Ya. Faenov, A.  ,  Hayashi, Yukio  ,  Kotaki, Hideyuki  ,  N. Ragozin, E.  ,  Neely, D.  ,  Kiriyama, Hiromitsu  ,  Kevin Koga, James  ,  Fukuda, Yuuji  ,  Sagisaka, Akito  ,  Nishikino, Masaharu  ,  Imazono, Takashi  ,  Hasegawa, Noboru  ,  Kawachi, Tetsuya  ,  Daido, Hiroyuki  ,  Kato, Yoshiaki  ,  Bulanov, Sergey  ,  Kondo, Kiminori  ,  Kando, Masaki

2017-03-19
内容記述
High-order harmonics from relativistic singularities are emitted when a multi-terawatt femtosecond laser irradiates a gas jet target [1, 2]. The laser pulse pushes electrons producing an electron-free cavity and generates a bow wave [3]; the singularities are produced at the joining of the cavity wall and the bow wave and represent point-like coherent x-ray emitters. The emitted spectra generally consist of high-order harmonics of optical frequency. However, the spectra often exhibit additional features such as modulations with large period (up to 10s of eV) and presence of several periods in a single spectrum. Here we report on analysis of experimental spectra with the emphasis on dependence on laser and plasma parameters, and discuss possible implications.This work was supported by JSPS KAKENHI # JP 25287103, JP 25390135, and JP 26707031.
JPS Spring Annual Meeting

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