2016年9月
Ultrahigh-contrast kilojoule-class petawatt LFEX laser using a plasma mirror
APPLIED OPTICS
- 巻
- 55
- 号
- 25
- 開始ページ
- 6850
- 終了ページ
- 6857
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1364/AO.55.006850
- 出版者・発行元
- OPTICAL SOC AMER
Laser pulse contrast exceeding 1011 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 1011 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 0.1 mu m thick CH film showing excellent pulse contrast. This technique constitutes a promising method to enhance the LFEX laser system performance in fast ignition experiments. (C) 2016 Optical Society of America
- リンク情報
- ID情報
-
- DOI : 10.1364/AO.55.006850
- ISSN : 1559-128X
- eISSN : 2155-3165
- Web of Science ID : WOS:000383994600011