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首页> 外文期刊>Review of Scientific Instruments >Ion‐extraction performance of the circular magnetic‐multipole bucket ion source applied for the neutral beam injection system of the Heliotron E machine
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Ion‐extraction performance of the circular magnetic‐multipole bucket ion source applied for the neutral beam injection system of the Heliotron E machine

机译：应用于Heliotron E机中性束注入系统的圆形多极桶形离子源的离子提取性能

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摘要

The ion‐beam extraction performance of the 30‐kV–35‐A circular magnetic‐multipole bucket ion source applied for the neutral beam injection system of the Heliotron E fusion machine has been investigated with special reference to ion‐beam optics. By using the numerical simulation code for the cylindrical ion‐extraction system, the computational beam‐divergence angles have been compared with the experimental data. The experiments show that the applied three‐electrode beam optics are satisfactorily stable against source‐plasma variation and that the minimum beam‐divergence angle is less than 1.15 deg. The obtained optimal perveance of the ion source is nearly 6.3×10-6 (A/V3/2), and the experimental optics behavior is in reasonable agreement with the numerical prediction. On the basis of the experiments, the effect of the edge angle of the first beam‐forming, high‐potential electrode is also discussed. The experiment suggests that the obtuse angle (∼73°) for that edge is preferable to the acute angle (∼30°).
机译：研究了Heliotron E聚变机中性束注入系统中使用的30-kV-35-A圆形磁多极桶形离子源的离子束提取性能，并特别参考了离子束光学器件。通过使用圆柱离子萃取系统的数值模拟代码，将计算束发散角与实验数据进行了比较。实验表明，所应用的三电极射束光学器件对源-等离子体变化具有令人满意的稳定性，最小射束发散角小于1.15度。所获得的离子源的最佳性能接近6.3×10-6（A / V3 / 2），并且实验光学行为与数值预测合理吻合。在实验的基础上，还讨论了第一个波束形成高电位电极的边角的影响。实验表明，该边缘的钝角（〜73°）优于锐角（〜30°）。

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