The Role of Collision Ionization of K-Shell Ions in Nonequilibrium Plasmas Produced by the Action of Super Strong, Ultrashort PW-Class Laser Pulses on Micron-Scale Argon Clusters with Intensity up to 5 × 1021 W/cm2

Autor: Igor Yu. Skobelev, Sergey N. Ryazantsev, Roman K. Kulikov, Maksim V. Sedov, Evgeny D. Filippov, Sergey A. Pikuz, Takafumi Asai, Masato Kanasaki, Tomoya Yamauchi, Satoshi Jinno, Masato Ota, Syunsuke Egashira, Kentaro Sakai, Takumi Minami, Yuki Abe, Atsushi Tokiyasu, Hideki Kohri, Yasuhiro Kuramitsu, Youichi Sakawa, Yasuhiro Miyasaka, Kotaro Kondo, Akira Kon, Akito Sagisaka, Koichi Ogura, Alexander S. Pirozhkov, Masaki Kando, Hiromitsu Kiriyama, Tatiana A. Pikuz, Yuji Fukuda

Publikováno v: Photonics, Vol 10, Iss 11, p 1250 (2023)

The generation of highly charged ions in laser plasmas is usually associated with collisional ionization processes that occur in electron–ion collisions. An alternative ionization channel caused by tunnel ionization in an optical field is also capa

Externí odkaz: https://doaj.org/article/87d970d43b794b818e4610baef93d1c6

Ultrafast visualization of an electric field under the Lorentz transformation

Autor: Masato Ota, Koichi Kan, Soichiro Komada, Youwei Wang, Verdad C. Agulto, Valynn Katrine Mag-usara, Yasunobu Arikawa, Makoto R. Asakawa, Youichi Sakawa, Tatsunosuke Matsui, Makoto Nakajima

Publikováno v: Nature Physics. 18:1436-1440

In special relativity, four-vectors, such as space–time, energy–momentum and electromagnetic potential vectors, follow the Lorentz transformation. The transformations of space–time and energy–momentum vectors have been tested by time dilation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6c951a4e82a7557a0f72fe4c9dbca561
https://doi.org/10.1038/s41567-022-01767-w

Laser astrophysics experiment on the amplification of magnetic fields by shock-induced interfacial instabilities

Autor: Michel Koenig, Youichi Sakawa, P. Mabey, Bruno Albertazzi, Masakatsu Murakami, Takayoshi Sano, M. Ota, Seung Ho Lee, R. Kumar, S. Egashira, Kazuki Matsuo, Alexis Casner, Taichi Morita, Shohei Tamatani, Y. Hara, Keisuke Shigemori, Shinsuke Fujioka, Shohei Sakata, Thibault Michel, H. Shimogawara, G. Rigon, King Fai Farley Law

Publikováno v: Physical Review E
Physical Review E, American Physical Society (APS), 2021, 104, ⟨10.1103/physreve.104.035206⟩
Phys.Rev.E
Phys.Rev.E, 2021, 104 (3), pp.035206. ⟨10.1103/PhysRevE.104.035206⟩
Physical Review E, 2021, 104, ⟨10.1103/physreve.104.035206⟩

Laser experiments are becoming established as a new tool for astronomical research that complements observations and theoretical modeling. Localized strong magnetic fields have been observed at a shock front of supernova explosions. Experimental conf

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::403d413074b7ccd35285c33d13f7ddcd
https://hal.archives-ouvertes.fr/hal-03424961/document

Ion acceleration at two collisionless shocks in a multicomponent plasma

Autor: Nigel Woolsey, R. Kumar, Leonard N. K. Döhl, Takayoshi Sano, Alessio Morace, Youichi Sakawa

Publikováno v: Physical Review E. 103

Intense laser-plasma interactions are an essential tool for the laboratory study of ion acceleration at a collisionless shock. With two-dimensional particle-in-cell calculations of a multicomponent plasma we observe two electrostatic collisionless sh

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50995135a68b561e14ec7022f30fa70a
https://doi.org/10.1103/physreve.103.043201

Study of the measurement for electron bunches and the irradiation effect by femtosecond electro-optic sampling

Autor: Yasunobu Arikawa, M. Ota, Sadashi Segawa, T. Shimizu, Youichi Sakawa, Koichi Kan, Makoto Nakajima

Publikováno v: 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).

The temporal electric field distribution by the propagating picosecond electron bunches was measured by using electro-optic sampling in a ZnTe crystal with the near-infrared femtosecond laser pulses. The temporal profile of the electron bunches with

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eac3ec41587eb2a3c3a2290ea6f2a5db
https://doi.org/10.1109/irmmw-thz46771.2020.9370579