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- W1678667557 abstract "This paper describes the mechanism of efficient H− production in a high-density hydrogen plasma produced by helicon wave discharge. An H− source using helicon wave discharge has been developed. Spatial and temporal variations of H− density in the helicon plasma were measured by laser photodetachment technique. A steep increase in H− density was observed in the afterglow. The H− ions were efficiently produced for the first 20μs after the termination of the discharge and mainly lost by mutual neutralization with positive ions. In the outer region of the plasma column, 20% of the negatively charged particles were H− ions. In the region of Te=1.5−2 eV, the effective attachment rate coefficient defined as the average value for hydrogen molecules of all energy levels was evaluated to be 0.5−1.3×10−11 cm3/s, of which the value is 3-order higher than that for attachment to the v=0 level of the ground state molecules." @default.
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- W1678667557 date "1998-01-01" @default.
- W1678667557 modified "2023-09-25" @default.
- W1678667557 title "Efficient production of H[sup −] in high-density helicon plasmas" @default.
- W1678667557 doi "https://doi.org/10.1063/1.56365" @default.
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