中国物理B ›› 2007, Vol. 16 ›› Issue (9): 2752-2756.doi: 10.1088/1009-1963/16/9/042

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Influence of air pressure on mechanical effect of laser plasma shock wave

章玉珠, 王广安, 朱金荣, 沈中华, 倪晓武, 陆建   

  1. Department of Applied Physics, Nanjing University of Science {\& Technology, Nanjing 210094, China
  • 收稿日期:2006-10-13 修回日期:2007-03-09 出版日期:2007-09-20 发布日期:2007-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No~60578015).

Influence of air pressure on mechanical effect of laser plasma shock wave

Zhang Yu-Zhu(章玉珠)† , Wang Guang-An(王广安), Zhu Jin-Rong(朱金荣), Shen Zhong-Hua(沈中华), Ni Xiao-Wu(倪晓武), and Lu Jian(陆建)   

  1. Department of Applied Physics, Nanjing University of Science & Technology, Nanjing 210094, China
  • Received:2006-10-13 Revised:2007-03-09 Online:2007-09-20 Published:2007-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No~60578015).

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摘要： The influence of air pressure on mechanical effect of laser plasma shock wave in a vacuum chamber produced by a Nd:YAG laser has been studied. The laser pulses with pulse width of 10ns and pulse energy of about 320mJ at 1.06$\mu $m wavelength is focused on the aluminium target mounted on a ballistic pendulum, and the air pressure in the chamber changes from $2.8\times 10^{3}$ to 1.01$\times $10$^{5 }$Pa. The experimental results show that the impulse coupling coefficient changes as the air pressure and the distance of the target from focus change. The mechanical effects of the plasma shock wave on the target are analysed at different distances from focus and the air pressure.

关键词: mechanical effect, plasma shock wave, impulse coupling coefficient, air pressure

Abstract: The influence of air pressure on mechanical effect of laser plasma shock wave in a vacuum chamber produced by a Nd:YAG laser has been studied. The laser pulses with pulse width of 10ns and pulse energy of about 320mJ at 1.06$\mu $m wavelength is focused on the aluminium target mounted on a ballistic pendulum, and the air pressure in the chamber changes from $2.8\times 10^{3}$ to 1.01$\times $10$^{5 }$Pa. The experimental results show that the impulse coupling coefficient changes as the air pressure and the distance of the target from focus change. The mechanical effects of the plasma shock wave on the target are analysed at different distances from focus and the air pressure.

Key words: mechanical effect, plasma shock wave, impulse coupling coefficient, air pressure

中图分类号:  (Shock waves and discontinuities)

  • 52.35.Tc
52.38.-r (Laser-plasma interactions) 52.50.Lp (Plasma production and heating by shock waves and compression)