Production of a large area diffuse arc plasma with multiple cathode
Wang Cheng1, †, Cui Hai-Chao1, Li Wan-Wan1, Liao Meng-Ran1, Xia Wei-Luo2, Xia Wei-Dong1
       

(color online) Typical Boltzmann plot for the selected He I lines obtained inside the diffuse arc at R = 9 mm.