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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Enhancement of negative hydrogen ion production in an electron cyclotron resonance source
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Enhancement of negative hydrogen ion production in an electron cyclotron resonance source

机译：电子回旋共振源中负氢离子产生的增强

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摘要

In this paper, we present a method for improving the negative hydrogen ion yield in the electron cyclotron resonance source with driven plasma rings where the negative ion production is realized in two stages. First, the hydrogen and deuterium molecules are excited in collisions with plasma electrons to high-laying Rydberg and high vibration levels in the plasma volume. The second stage leads to negative ion production through the process of repulsive attachment of low-energy electrons by the excited molecules. The low-energy electrons originate due to a bombardment of the plasma electrode surface by ions of a driven ring and the thermoelectrons produced by a rare earth ceramic electrode, which is appropriately installed in the source chamber. The experimental and calculation data on the negative hydrogen ion generation rate demonstrate that very low-energy thermoelectrons significantly enhance the negative-ion generation rate that occurs in the layer adjacent to the plasma electrode surface. It is found that heating of the tungsten filaments placed in the source chamber improves the discharge stability and extends the pressure operation range.
机译：在本文中，我们提出了一种在带驱动等离子体环的电子回旋共振源中提高负氢离子收率的方法，该方法通过两个阶段实现负离子的产生。首先，氢和氘分子在与等离子电子的碰撞中被激发到高倍的里德伯格和等离子体中的高振动水平。第二阶段通过被激发的分子排斥低能电子的过程导致负离子的产生。低能电子的产生是由于等离子电极表面受到驱动环的离子轰击以及稀土陶瓷电极产生的热电子轰击，稀土陶瓷电极被适当地安装在源室中。关于负氢离子产生速率的实验和计算数据表明，非常低能量的热电子显着提高了在邻近等离子电极表面的层中发生的负离子产生速率。发现放置在源室中的钨丝的加热改善了放电稳定性并扩展了压力操作范围。

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