Acta Photonica Sinica, Volume. 47, Issue 8, 847012(2018)
Magnetic Confinement Effect on Femtosecond Laser-induced Copper Plasma
The spectroscopy collection system of femtosecond laser-induced copper plasma with magnetic confinement was established. The magnetic confinement effects in the femtosecond laser-induced Cu plasma were investigated by optical emission spectroscopy. When plasma was confined by magnetic field with intensity of 0.67 T, the plasma emission continuous and discrete spectrum enhanced meanwhile the discrete spectrum enhanced more significantly. The enhancement factor of Cu atomic line with higher upper level energy is larger. The Cu I 507.6 nm is emitted from the highest upper level energy; its enhancement factor is largest and could be up to 2.8. The persistence duration of copper atomic spectra last longer. The copper atomic spectra enhanced significantly in the early delay time and weakly in late delay time. The electron temperature and number density of plasma in magnetic filed improved.
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XU Dong-hua, SONG Chao, ZHAO Shang-yong, GAO Xun, LIN Jing-quan. Magnetic Confinement Effect on Femtosecond Laser-induced Copper Plasma[J]. Acta Photonica Sinica, 2018, 47(8): 847012
Received: Jun. 23, 2018
Accepted: --
Published Online: Sep. 16, 2018
The Author Email: Dong-hua XU (805111271@qq.com)