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首页> 外文会议>International Symposium on Negative Ions, Beams and Sources >An experimental study of waveguide coupled microwave heating with conventional multicusp negative ion sources
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An experimental study of waveguide coupled microwave heating with conventional multicusp negative ion sources

机译：具有常规多功能负离子源的波导耦合微波加热的实验研究

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Negative ion production with conventional multicusp plasma chambers utilizing 2.45 GHz microwave heating is demonstrated. The experimental results were obtained with the multicusp plasma chambers and extraction systems of the RF-driven RADIS ion source and the filament driven arc discharge ion source LIISA. A waveguide microwave coupling system, which is almost similar to the one used with the SILHI ion source, was used. The results demonstrate that at least one third of negative ion beam obtained with inductive RF-coupling (RADIS) or arc discharge (LIISA) can be achieved with 1 kW of 2.45 GHz microwave power in CW mode without any modification of the plasma chamber. The co-extracted electron to H~- ratio and the optimum pressure range were observed to be similar for both heating methods. The behaviour of the plasma implies that the energy transfer from the microwaves to the plasma electrons is mainly an off-resonance process.
机译：通过使用2.45GHz微波加热的常规多功能级腔室的负离子产生进行说明。用射频等离子体室和RF驱动的径向离子源的萃取系统和丝网驱动电弧放电离子源Liisa获得实验结果。使用了几乎类似于与Silhi离子源一起使用的波导微波耦合系统。结果表明，通过在CW模式下以1kW的2.45GHz微波功率实现，可以实现具有电感RF耦合（RADIS）或电弧放电（LIISA）获得的至少三分之一的负离子束，而不在没有等离子体室的修改。观察到共同提取的电子至H〜比率和最佳压力范围对于两种加热方法相似。等离子体的行为意味着从微波到等离子体电子的能量转移主要是偏离共振过程。

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