中国物理B ›› 2007, Vol. 16 ›› Issue (8): 2439-2443.doi: 10.1088/1009-1963/16/8/047

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2D hydrodynamic simulation of a line-focused plasma in Ni-like Ag x-ray laser research

张国平1, 郑无敌2   

  1. (1)Institute of Applied Physics and Computational Mathematics, Beijing 100088, China; (2)Institute of Applied Physics and Computational Mathematics, Beijing 100088, China；Graduated School of China Academy of Engineering Physics, Beijing 100088, China
  • 收稿日期:2006-10-23 修回日期:2007-02-17 出版日期:2007-08-20 发布日期:2007-08-20
  • 基金资助:
    Project supported by the National High Technology Development Program of China (Grant No~803-804-7-1).

2D hydrodynamic simulation of a line-focused plasma in Ni-like Ag x-ray laser research

Zheng Wu-Di(郑无敌)a)b))† and Zhang Guo-Ping(张国平)a)   

  1. a Institute of Applied Physics and Computational Mathematics, Beijing 100088, China; b Graduated School of China Academy of Engineering Physics, Beijing 100088, China
  • Received:2006-10-23 Revised:2007-02-17 Online:2007-08-20 Published:2007-08-20
  • Supported by:
    Project supported by the National High Technology Development Program of China (Grant No~803-804-7-1).

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摘要： In most collisional schemes of x-ray laser (XRL) experiments, a bow-like intensity distribution of XRL is often observed, and it is generally ascribed to the two-dimensional hydrodynamic behaviour of expanding plasma. In order to better understand its essence in physics, a newly developed two-dimensional non-equilibrium radiation hydrodynamic code XRL2D is used to simulate a quasi-steady state Ni-like Ag XRL experiment on ShenGuang-II facility. The simulation results show that the bow-like distribution of Ni-like ions caused by over-ionization in the central area of plasma is responsible for the bow-like shape of the XRL intensity distribution observed.

关键词: x-ray laser, numerical simulation, line-focused plasma

Abstract: In most collisional schemes of x-ray laser (XRL) experiments, a bow-like intensity distribution of XRL is often observed, and it is generally ascribed to the two-dimensional hydrodynamic behaviour of expanding plasma. In order to better understand its essence in physics, a newly developed two-dimensional non-equilibrium radiation hydrodynamic code XRL2D is used to simulate a quasi-steady state Ni-like Ag XRL experiment on ShenGuang-II facility. The simulation results show that the bow-like distribution of Ni-like ions caused by over-ionization in the central area of plasma is responsible for the bow-like shape of the XRL intensity distribution observed.

Key words: x-ray laser, numerical simulation, line-focused plasma

中图分类号:  (X- and γ-ray lasers)

  • 42.55.Vc
52.38.Dx (Laser light absorption in plasmas (collisional, parametric, etc.)) 52.65.-y (Plasma simulation)