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An overview of LLNL high-energy short-pulse technology for advanced radiography of laser fusion experiments

C.P.J. Barty, M. Key, J. Britten, R. Beach, G. Beer, C. Brown, S. Bryan, J. Caird, T. Carlson, J. Crane2004年被引用 99Nuclear FusionIF 3出版社

The technical challenges and motivations for high-energy, short-pulse generation with the National Ignition Facility (NIF) and possibly other large-scale Nd : glass lasers are reviewed. High-energy short-pulse generation (multi-kilojoule, picosecond pulses) will be possible via the adaptation of chirped pulse amplification laser techniques on NIF. Development of metre-scale, high-efficiency, high-damage-threshold final optics is a key technical challenge. In addition, deployment of high energy petawatt (HEPW) pulses on NIF is constrained by existing laser infrastructure and requires new, compact compressor designs and short-pulse, fibre-based, seed-laser systems. The key motivations for HEPW pulses on NIF is briefly outlined and includes high-energy, x-ray radiography, proton beam radiography, proton isochoric heating and tests of the fast ignitor concept for inertial confinement fusion.

日本語訳

高出力・短パルス発生における技術的課題と動機について、国立点火施設(NIF)および他の大型Nd:ガラスレーザーを用いた場合を中心に概説する。チャープパルス増幅レーザー技術をNIFに適用することで、高出力・短パルス発生(マルチキロジュール、ピコ秒パルス)が可能となる。メートル規模で高効率かつ高損傷閾値を有する最終光学素子の開発が、主要な技術的課題である。さらに、NIFにおける高出力ペタワット(HEPW)パルスの展開は、既存のレーザーインフラによって制約され、新型のコンパクトな圧縮器と短パルスファイバーベースのシードレーザーシステムを必要とする。NIFにおけるHEPWパルスの主な動機は、高エネルギーX線ラジオグラフィー、陽子線ラジオグラフィー、陽子等容加熱、および慣性核融合のための高速点火コンセプトの検証であり、これらを簡潔に述べる。

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