Influence of filament materials on vacuum ultraviolet emission in H− ion source
Influence of filament materials on vacuum ultraviolet emission in H− ion source
复制标题
灯丝材料对H−离子源真空紫外发射的影响
DOI：
10.1063/1.1431408
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发表时间：
2002
影响因子：
1.6
通讯作者：
M. Bacal
中科院分区：
文献类型：
--
作者：
M. Nishiura;M. Sasao;Y. Matsumoto;M. Hamabe;M. Wada;H. Yamaoka;M. Bacal
当使用钽丝代替钨丝时，观察到H−电流的增加。根据钨丝和钽丝对氢分子振动布居数的产生率，我们测量了真空紫外区的Werner和莱曼发射带（90-170 nm），得到了氢分子在离子源中的光谱，观察到两种情况下的光谱有明显的差别。从压力的依赖性，它被发现，振动激发的氢分子的生产率与氢等离子体中的光剥离测量的H−密度很好地相关。
The increase of H− current is observed, when the tantalum filaments are used instead of the tungsten filaments. In terms of the production rate of vibrational populations of hydrogen molecules with tungsten and tantalum filaments, we measured the Werner and Lyman emission bands (90–170 nm) the vacuum ultraviolet region to obtain the spectra of molecular hydrogen in an ion source, and observed a significant difference of spectrum between the two cases. From the pressure dependence, it is found that the production rate of vibrationally excited hydrogen molecules is well correlated with the H− density measured by photodetachment in hydrogen plasmas.