Formation of lithium vapor cloud occurs above lithium surface as temperature goes up. Experiments devoted to investigating lithium vapor cloud interacting with expanding argon plasma under applied electric field have been carried out in a linear plasma device. Lithium spectrum has been characterized by utilizing optical emission spectroscopy (OES) and many emission lines of lithium atoms have been observed, including Li_670.78nm (1.9eV), Li_610.36nm (3.87eV), Li_460.30nm (4.54eV) and Li_323.26nm (3.83eV). Enhanced erosion of lithium surface caused by surface adatoms was found when bias is high, its effective adatoms sublimation energy was calculated to be 1.72eV at the high temperature through Arrhenius plot in enhanced region. The surface temperature of liquid lithium has been monitored by a thermocouple. Since incident argon ion energy has been elevated due to the applied electric field acceleration, the temperature of lithium surface will have different behaviors with different biases, and it turns out that the temperature has a linear relation with bias, about an increase of 16–17°C per 5V bias voltage. By calculating evaporation power, excitation power and ionization power, indicating that at temperatures above 700–800°C, heat flux dissipated in the lithium vapor can have a huge meaningful decrease.

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li67078hsp sp025nm 19hsp sp025ev li61036hsp sp025nm 387hsp sp025ev li46030hsp sp025nm 454hsp ion optical emission spectroscopy spectrum vapor cloud erosion surface temperature argon evaporation power excitation power ionization adatoms sublimation energy heat flux dissipated biases

Xiaogang Cao, Fujun Gou,Lei Han, Jianjun Wei, Zhi Cao, Pingni He, Wenxing Xia, Xiaochun Ma, Lei Shu,.Enhanced erosion of lithium surface with capillary porous system. (),.

Xiaogang Cao, et al."Enhanced erosion of lithium surface with capillary porous system"

Xiaogang Cao, Fujun Gou,Lei Han, Jianjun Wei, Zhi Cao, Pingni He, Wenxing Xia, Xiaochun Ma, Lei Shu,"Enhanced erosion of lithium surface with capillary porous system"