Ultrahigh-contrast kilojoule-class petawatt LFEX laser using a plasma mirror
Year: 2016
Type: article
Abstract: Laser pulse contrast exceeding 1011 was demonstrated on a kilojoule-class petawatt laser for fast ignition experiments (LFEX) laser system [J. Phys. IV France133, 81 (2006)10.1051/jp4:2006133016] by implementing a 2 in. plasma mirror. Laser beams of up to 1.2 kJ striking the plasma mirror with a pulse duration of 1.5 ps were reflected and focused onto a target without significant distortions in the focal spot. Transmitted light from the plasma mirror reveals that it has a high reflectivity 2 ps before the main peak. The estimated laser pulse contrast at the target was 1011 at 1 ns before the main peak. No preformed plasma was observed with an optical interferometry diagnostics, but in the experiment without a plasma mirror a preplasma was clearly observed. The energetic proton was generated from a 0.1 μm thick CH film showing excellent pulse contrast. This technique constitutes a promising method to enhance the LFEX laser system performance in fast ignition experiments.
Source: Applied Optics
DOI: 10.1364/ao.55.006850
Authors: Yasunobu Arikawa, Sadaoki Kojima, Alessio Morace, Shohei Sakata, Takayuki Gawa, Yuki Taguchi, Yuki Abe, Zhe Zhang, Xavier Vaisseau, Seung Ho Lee, Kazuki Matsuo, Shota Tosaki, Masayasu Hata, Koji Kawabata, Yuhei Kawakami, Masato Ishida, Koichi Tsuji, Satoshi Matsuo, Noboru Morio, Tetsuji Kawasaki, Shigeki Tokita, Yoshiki Nakata, Takahisa Jitsuno, Noriaki Miyanaga, Junji Kawanaka, Hideo Nagatomo, Akifumi Yogo, Mitsuo Nakai, Hiroaki Nishimura, Hiroyuki Shiraga, Shinsuke Fujioka, FIREX Group, LFEX Group, Hiroshi Azechi, Atsushi Sunahara, Tomoyuki Johzaki, Tetsuo Ozaki, Hitoshi Sakagami, Akito Sagisaka, Koichi Ogura, Alexander S. Pirozhkov, Masaharu Nishikino, Kiminori Kondo, Shunsuke Inoue, Kensuke Teramoto, Masaki Hashida, Shuji Sakabe
Institutions: Institute of Laser Engineering, The University of Osaka, The University of Osaka, Institute for Laser Technology, Hiroshima University, National Institute for Fusion Science, National Institutes for Quantum Science and Technology, Kansai Institute for Photon Science, Kyoto University, Kyoto University Institute for Chemical Research
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: Proof-of-principle of Magnetized Fast Ignition, Collisionless shock wave and ion acceleration driven by ultra-intense laser under a strong magnetic field, Development of nondestructive investigation technology by using neutrons generated by laser driven photo nuclear reaction, 高速点火核融合実験における高速電子計測による加熱効率の評価, Numerical modeling on transport of high energy paticles in the fast ignition scheme
OpenAlex ID: W2508477849