Influence of air pressure on mechanical effect of laser plasma shock wave |
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Authors: | Zhang Yu-Zhu Wang Guang-An Zhu Jin-Rong Shen Zhong-Hu Ni Xiao-Wu and Lu Jian |
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Institution: | Department of Applied Physics, Nanjing University of Science & Technology, Nanjing 210094, China |
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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. |
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Keywords: | mechanical effect plasma shock wave impulse coupling
coefficient air pressure |
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