Ultrahigh-contrast kilojoule-class petawatt LFEX laser using a plasma mirror

Laser pulse contrast exceeding 10^11 was demonstrated on a kilojoule-class petawatt laser for fast ignition experiments (LFEX) laser system [J. Phys. IV France 133, 81 (2006)] 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 10^11 at 1 ns before the main peak. No preformed plasma was observed with optical interferometry diagnostics, but in the experiment without a plasma mirror a preplasma was clearly observed. The energetic proton was generated from a 0.1μm thick CH film showing excellent pulse contrast. This technique constitutes a promising method to enhance the LFEX laser system performance in fast ignition experiments.

書誌情報

Applied Optics

巻 55, 号 25, p. 6850-6857, 発行日 2016-09

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Optical Society of America

DOI

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DOI

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Ultrahigh-contrast kilojoule-class petawatt LFEX laser using a plasma mirror

× Arikawa, Yasunobu

× Kojima, Sadaoki

× Morace, Alessio

× Sakata, Shohei

× Gawa, Takayuki

× Taguchi, Yuki

× Abe, Yuki

× Zhang, Zhe

× Vaisseau, Xavier

× Ho, Lee Seung

× Matsuo, Kazuki

× Tosaki, Shota

× Hata, Masayasu

× Kawabata, Koji

× Kawakami, Yuhei

× Ishida, Masato

× Tsuji, Koichi

× Matsuo, Satoshi

× Morio, Noboru

× Kawasaki, Tetsuji

× Tokita, Shigeki

× Nakata, Yoshiki

× Jitsuno, Takahisa

× Miyanaga, Noriaki

× Kawanaka, Junji

× Nagatomo, Hideo

× Yogo, Akifumi

× Nakai, Mitsuo

× Nishimura, Hiroaki

× Shiraga, Hiroyuki

× Fujioka, Shinsuke

× Group, FIREX

× Group, LFEX

× Azechi, Hiroshi

× Sunahara, Atsushi

× Johzaki, Tomoyuki

× Ozaki, Tetsuo

× Sakagami, Hitoshi

× Sagisaka, Akito

× Ogura, Koichi

× Pirozhkov, Alexander

× Nishikino, Masaharu

× Kondo, Kiminori

× Inoue, Shunsuke

× Teramoto, Kensuke

× Hashida, Masaki

× Sakabe, Shuji

× 匂坂 明人

× 小倉 浩一

× ピロジコフ アレキサンダー

× 錦野 将元

× 近藤 公伯

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× 匂坂明人

× 小倉浩一

× ピロジコフアレキサンダー

× 錦野将元

× 近藤公伯