T
Takashi Kameshima
Researcher at Japan Atomic Energy Agency
Publications - 34
Citations - 807
Takashi Kameshima is an academic researcher from Japan Atomic Energy Agency. The author has contributed to research in topics: Laser & Plasma. The author has an hindex of 15, co-authored 34 publications receiving 745 citations. Previous affiliations of Takashi Kameshima include Graduate University for Advanced Studies.
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Journal ArticleDOI
Energy increase in multi-MeV ion acceleration in the interaction of a short pulse laser with a cluster-gas target.
Yuji Fukuda,A. Ya. Faenov,Motonobu Tampo,Tatiana Pikuz,Tatsufumi Nakamura,Masaki Kando,Yukio Hayashi,Akifumi Yogo,Hironao Sakaki,Takashi Kameshima,Alexander S. Pirozhkov,Koichi Ogura,Michiyasu Mori,T. Zh. Esirkepov,James Koga,A. S. Boldarev,Vladimir A. Gasilov,A. I. Magunov,Tomoya Yamauchi,R. Kodama,Paul R. Bolton,Yoshiaki Kato,Toshiki Tajima,Hiroyuki Daido,Sergei V. Bulanov,Sergei V. Bulanov +25 more
TL;DR: It is inferred from a particle-in-cell simulation that the high energy ions are generated at the rear side of the target due to the formation of a strong dipole vortex structure in subcritical density plasmas.
Journal ArticleDOI
Enhancement of photon number reflected by the relativistic flying mirror.
Masaki Kando,Alexander S. Pirozhkov,K. Kawase,T. Zh. Esirkepov,Yuji Fukuda,Hiromitsu Kiriyama,Hajime Okada,Izuru Daito,Takashi Kameshima,Yukio Hayashi,Hideyuki Kotaki,Michiyasu Mori,James Koga,Hiroyuki Daido,A. Ya. Faenov,Tatiana Pikuz,Jinglong Ma,Liming Chen,E. N. Ragozin,Tetsuya Kawachi,Yoshiaki Kato,Toshiki Tajima,Sergei V. Bulanov +22 more
TL;DR: The demonstrated flying mirror reflectivity is close to the theoretical estimate for the parameters of the experiment, and the counterpropagating laser pulse is reflected and upshifted in frequency with a multiplication factor of 37-66, corresponding to the extreme ultraviolet wavelength.
Journal ArticleDOI
Soft-x-ray harmonic comb from relativistic electron spikes
Alexander S. Pirozhkov,Masaki Kando,T. Zh. Esirkepov,P. Gallegos,P. Gallegos,Hamad Ahmed,E. N. Ragozin,A. Ya. Faenov,A. Ya. Faenov,T. A. Pikuz,T. A. Pikuz,Tetsuya Kawachi,Akito Sagisaka,James Koga,M. Coury,James Green,Peta Foster,Ceri Brenner,Ceri Brenner,Brendan Dromey,D. R. Symes,Michiyasu Mori,K. Kawase,Takashi Kameshima,Yuji Fukuda,Liming Chen,Izuru Daito,Koichi Ogura,Yukio Hayashi,Hideyuki Kotaki,Hiromitsu Kiriyama,Hajime Okada,Nobuyuki Nishimori,Takashi Imazono,Kotaro Kondo,Toyoaki Kimura,Toshiki Tajima,Hiroyuki Daido,P. P. Rajeev,Paul McKenna,Marco Borghesi,David Neely,David Neely,Yoshiaki Kato,Sergei V. Bulanov +44 more
TL;DR: In this article, a new high-order harmonic generation mechanism reaching the "water window" spectral region was demonstrated with multiterawatt femtosecond lasers irradiating gas jets.
Journal ArticleDOI
Electron Optical Injection with Head-On and Countercrossing Colliding Laser Pulses
Hideyuki Kotaki,Izuru Daito,Masaki Kando,Yukio Hayashi,K. Kawase,Takashi Kameshima,Yuji Fukuda,T. Homma,Jinglong Ma,Liming Chen,T. Zh. Esirkepov,Alexander S. Pirozhkov,James K. Koga,A. Y. Faenov,T. A. Pikuz,Hiromitsu Kiriyama,Hajime Okada,Takuya Shimomura,Y. Nakai,Manabu Tanoue,H. Sasao,D. Wakai,H. Matsuura,S. Kondo,S. Kanazawa,Akira Sugiyama,Hiroyuki Daido,Sergei V. Bulanov +27 more
TL;DR: A high stability electron bunch is generated by laser wakefield acceleration with the help of a colliding laser pulse, which has high stability and high reproducibility compared with single pulse electron generation.
Journal ArticleDOI
Soft x-ray source for nanostructure imaging using femtosecond-laser-irradiated clusters
Yuji Fukuda,A. Ya. Faenov,T. A. Pikuz,Masaki Kando,Hideyuki Kotaki,Izuru Daito,Jinglong Ma,Liming Chen,T. Homma,K. Kawase,Takashi Kameshima,Tetsuya Kawachi,Hiroyuki Daido,Toyoaki Kimura,Toshiki Tajima,Yoshiaki Kato,Sergei V. Bulanov +16 more
TL;DR: In this paper, a femtosecond Ti:sapphire laser pulse was used to enhance the radiation of soft x-rays from the CO2 clusters, and nanostructure images of 100-nm-thick Mo foils in a wide field of view (mm2 scale) with high spatial resolution (800nm) were obtained with high dynamic range LiF crystal detectors.