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越智 義浩; Golovkin, I.*; Mancini, R.*; Uschmann, I.*; 砂原 淳*; 西村 博明*; 藤田 和久*; Louis, S.*; 中井 光男*; 白神 宏之*; et al.
Review of Scientific Instruments, 74(3), p.1683 - 1687, 2003/03
被引用回数:10 パーセンタイル:49.39(Instruments & Instrumentation)高強度レーザー光を重水素を充填した燃料球に照射することにより生成されるレーザー爆縮コアプラズマ中の、電子温度,電子密度勾配の時間変化を、時間・空間分解X線分光法により明らかにした。実験においてX線分光ストリークラスターカメラによる時間分解X線スペクトルデータと単色X線駒取りカメラによる特定のラインX線に対応する単色のX線エネルギーの時間分解二次元画像データを同時に取得した。これらのデータをもとに遺伝的アルゴリズムを用いた自己無頓着な解析手法により、爆縮コア内部の電子温度,電子密度勾配を求めることに成功した。得られた成果と流体コードによるシミュレーションとを比較し、爆縮コアプラズマ形成の動的過程の診断を進めている。
Pikuz, S. Jr.*; Wagenaars, E.*; Culfa, O.*; Dance, R.*; Rossall, A.*; Tallents, G.*; Faenov, A.*; Kmpfer, T.*; Schulze, K.*; Uschmann, I.*; et al.
no journal, ,
Aluminum K-shell spectra from solid targets were measured during an experiment at Vulcan Petawatt facility. Laser pulses of very high contrast and 150 J of energy allowed interaction studies between the very high intensive laser field and solid state. Intense emission of exotic spectral lines related to the transitions in Al hollow atoms were observed from Al targets. Specifically for 1.5 micron thin foil target the hollow atom yield dominated the resonance line emission. It is suggested that the hollow atoms were predominantly excited by the impact of keV X-ray photons generated on the front surface of the target. On the contrary, the spectra of aluminum foils buried in several microns of CH demonstrated lower K-shell emission and contained much weaker yield of hollow-atom lines. In this case the laser did not interact directly with aluminum matter, so most probably hollow atoms excited by fast electrons penetrating the target.
Faenov, A.*; Colgan, J.*; Abdallah, J. Jr.*; Pikuz, S. A.*; Wagenaars, E.*; Booth, N.*; Brown, C. R. D.*; Culfa, O.*; Dance, R.*; Evans, R.*; et al.
no journal, ,
It was demonstrated that Hollow ions exotic states of matter, which are very far from equilibrium, can be formed by conventional optical laser technology when the laser intensity reached 10 W/cm and approaches to the radiation dominant regime.