Suppression of Rayleigh-Taylor Instability Using High-Z Doped Plastic Targets for Inertial Fusion Energy

• FUJIOKA Shinsuke

  Institute of Laser Engineering, Osaka University

• SUNAHARA Atsushi

  Institute of Laser Engineering, Osaka University

• OHNISHI Naofumi

  Department of Aeronautics and Space Engineering, Tohoku University

• AZECHI Hiroshi

  Institute of Laser Engineering, Osaka University

• SHIRAGA Hiroyuki

  Institute of Laser Engineering, Osaka University

• NAKAI Mitsuo

  Institute of Laser Engineering, Osaka University

• SHIGEMORI Keisuke

  Institute of Laser Engineering, Osaka University

• MURAKAMI Masakatsu

  Institute of Laser Engineering, Osaka University

• NAGAI Keiji

  Institute of Laser Engineering, Osaka University

• NISHIMURA Hiroaki

  Institute of Laser Engineering, Osaka University

• NORIMATSU Takayoshi

  Institute of Laser Engineering, Osaka University

• NISHIHARA Katsunobu

  Institute of Laser Engineering, Osaka University

• IZAWA Yasukazu

  Institute of Laser Engineering, Osaka University

• NOZAKI Shinya

  Information and Communication Systems Engineering, Okinawa National College of Technology

• CHEN Yen-wei

  Department of Electrical and Electronics Engineering, University of Ryukyus

Bibliographic Information

Other Title

• 高Ｚ物質ドープによるレーザ核融合ターゲット表面でのレイリー・テイラ不安定性の抑制
• コウZ ブッシツ ドープ ニ ヨル レーザーカク ユウゴウ ターゲット ヒョウメン デ ノ レイリー テイラー フアンテイセイ ノ ヨクセイ

Abstract

A scheme to suppress the ablative Rayleigh-Taylor (RT) instability using high-Z doped plastic target (brominated polystyrene;CHBr) has been proposed for a directly laser-driven IFE target. When an intense laser irradiates directly onto a high-Z doped target, radiation emitted from a corona plasma propagates and deposits locally its energy inside the target. The enhanced radiation forms the double-ablation structure, which consists of primaryelectron conduction ablation front and secondary radiative ablation front. The radiative ablation in the double-ablation structure has many advantages to suppress the growth of the RT instability in analogy of the indirect-drive approach, i.e. large mass ablation rate, long density scale length and low peak density. Two-dimensional (2D) hydrodynamic simulation code shows strong suppression of the RT instability in a brominated plastic (CHBr) target compared with that in an undoped polystyrene (CH) target. RT growth rates evaluated theoretically using the Betti-Goncharov procedure with one-dimensional(1D) radiation-hydrodynamic simulation are in good agreement with 2D simulation results. Several experiments were performed at the GEKKO XII- HIPER (High Intensity Plasma Experimental Research) laser facility. A trajectory of a laser-driven CHBr target observed in experiment was reproduced fairly well by 1D simulation code. The double-ablation structure formed inside a directly laser-driven CHBr target was clearly observed in experiments for the first time The strong suppression of the RT instability in the CHBr target was confirmed in experiments with face-on and side-on x-ray backlighting technique.

Journal

• Journal of Plasma and Fusion Research

  Journal of Plasma and Fusion Research 80 (7), 597-604, 2004

  The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

• inertial fusion energy
• Rayleigh-Taylor instability
• double ablation
• radiation
• high-Z doping

Details

• CRID: 1390282681489627904
• NII Article ID: 110003827795
• NII Book ID: AN10401672
• DOI: 10.1585/jspf.80.597
• NDL BIB ID: 7047593
• ISSN: 09187928
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7047593
• Web Site: http://www.jstage.jst.go.jp/article/jspf/80/7/80_7_597/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10455536
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • NDL-Digital
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed