Suppression of Rayleigh-Taylor Instability Using High-Z Doped Plastic Targets for Inertial Fusion Energy
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- FUJIOKA Shinsuke
- Institute of Laser Engineering, Osaka University
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- SUNAHARA Atsushi
- Institute of Laser Engineering, Osaka University
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- OHNISHI Naofumi
- Department of Aeronautics and Space Engineering, Tohoku University
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- AZECHI Hiroshi
- Institute of Laser Engineering, Osaka University
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- SHIRAGA Hiroyuki
- Institute of Laser Engineering, Osaka University
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- NAKAI Mitsuo
- Institute of Laser Engineering, Osaka University
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- SHIGEMORI Keisuke
- Institute of Laser Engineering, Osaka University
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- MURAKAMI Masakatsu
- Institute of Laser Engineering, Osaka University
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- NAGAI Keiji
- Institute of Laser Engineering, Osaka University
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- NISHIMURA Hiroaki
- Institute of Laser Engineering, Osaka University
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- NORIMATSU Takayoshi
- Institute of Laser Engineering, Osaka University
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- NISHIHARA Katsunobu
- Institute of Laser Engineering, Osaka University
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- IZAWA Yasukazu
- Institute of Laser Engineering, Osaka University
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- NOZAKI Shinya
- Information and Communication Systems Engineering, Okinawa National College of Technology
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- CHEN Yen-wei
- Department of Electrical and Electronics Engineering, University of Ryukyus
Bibliographic Information
- Other Title
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- 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
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Description
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
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- Journal of Plasma and Fusion Research
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Journal of Plasma and Fusion Research 80 (7), 597-604, 2004
The Japan Society of Plasma Science and Nuclear Fusion Research
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Details 詳細情報について
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- CRID
- 1390282681489627904
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- NII Article ID
- 110003827795
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- NII Book ID
- AN10401672
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- NDL BIB ID
- 7047593
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- ISSN
- 09187928
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- Text Lang
- ja
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- Article Type
- journal article
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- Data Source
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- JaLC
- NDL Search
- Crossref
- NDL Digital Collections (NII-ELS)
- CiNii Articles
- KAKEN
- OpenAIRE
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- Abstract License Flag
- Disallowed
