计算物理 ›› 1996, Vol. 13 ›› Issue (4): 454-458.

• 论文 • 上一篇    下一篇

强场下的Li-like氖复合机制X光激光的数值模拟

邵云峰1, Rose S J2, Djaoui A2   

  1. 1. 北京应用物理与计算数学研究所 100088;
    2. 英国卢瑟福实验室
  • 收稿日期:1995-07-13 出版日期:1996-12-25 发布日期:1996-12-25

NUMERICAL SIMULATION OF OPTICALLY IONISED LI-LIKE NEON PLASMA RECOMBINATION X-RAY LASERS

Y F Shao1, S J Rose2, A Djaoui2   

  1. 1. Institute of Applied Physics and Com putational Mathematics, P O Box 8009, Beijing 100088, P R China;
    2. Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX110QX, UK
  • Received:1995-07-13 Online:1996-12-25 Published:1996-12-25

摘要: 论述了隧道电离和阈上电离加热过程。并把此二过程加到一个non-LTE平均原子模型,用此模型来研究强场下光致电离类锂氖复合机制X射线激光。计算结果表明,当驱动激光脉冲为100fs、波长为0.248μm、功率密度为2×1017Wcm-2,氖气的密度为10-3gcm-3时,类锂氖精细结构跃迁3d5/2→2p3/2(λ=98Å)的最大增益系数约为100cm-1,其维持时间约为1.5ps。

关键词: 隧道电离, 阈上电离加热, 增益, 复合机制X射线激光

Abstract: A non-LTE average atom model which has been modified to include tunnel ionisation and ATI heating is presented, and the model is applied to study the optically ionised Li-like Ne recombination X-ray laser. Results from the calculation show that high gain in Li-like Ne at 9.8 nm can be produced with a 100 fsec duration, 0.248μm laser of intensity 2×10-17Wcm-2 and the gas density of 10-3gcm-3. The duration of X-ray lasing is about 1.5 psec.

Key words: Tunnel Ionisation, Above Threshold Ionisation, Game and Recombination X-ray lasers

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