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Influence of laser energy on the electron temperature of a laser-induced Mg plasma

Author:
Asamoah, Emmanuel   Hongbing, Yao   


Journal:
Applied Physics B


Issue Date:
2017


Abstract(summary):

The magnesium plasma induced by a 1064-nm Q-switched Nd: YAG laser in atmospheric air was investigated. The evolution of the plasma was studied by acquiring spectral images at different laser energies and delay times. We observed that the intensities of the spectral lines decrease with larger delay times. The electron temperature was determined using the Boltzmann plot method. At a delay time of 100 ns and laser energy of 350 mJ, the electron temperature attained their highest value at 10164 K and then decreases slowly up to 8833.6 K at 500 ns. We found that the electron temperature of the magnesium plasma increases rapidly with increasing laser energy.


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