Abstract
The system of a magnetized sheet plasma crossed with a vertical gas flow has been proposed to produce a high H- density. Under a secondary hydrogen gas supply entering into the plasma, the peak position of the H- ion density nH- is localized in the periphery of the sheet plasma. The value of nH- increases with increasing the discharge current Id. The variation of the hydrogen negative ion density is proportional to the vacuum ultraviolet (VUV) emission intensities of the Lyman band and the Werner band in hydrogen molecular bands. The measured H- density was compared with the theoretical calculation based on the rate equation of the transport of vibrationally excited hydrogen molecules H2*(X1Σg+, v''>5).
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