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本文系统地描述了强流表面电离离子源的工作原理和结构。详细论述了研制该源的技术关键,主要有:电离器材料的选择与成型、电离器的加热问题、蒸气的分配、流向与控制、 非所需电离表面的冷却和离子光学等。该源自1972年研制成功以来,已经应用于大型180°电磁同位素分离器上,它适于分离硷金属和稀土元素的同位素。例如,分离铷元素,其最大引出总离子流达10mA,最大接收总离子流为66mA,平均接收离子流大于25mA。大量结果表明:该源具有强流、聚焦性能好,稳定可靠等优点,并可望推广应用于其它领域。最后,本文还讨论了该源中出现的一些有趣的实验现象,指出了进一步研究的问题。
This article systematically describes the working principle and structure of a high current surface ionization ion source. The key technologies of this source are discussed in detail, including the selection and molding of ionizer materials, the heating problems of ionizers, the distribution, flow and control of steam, the cooling of non-desired ionized surfaces and the ion optics. Since its successful development in 1972, it has been applied to large 180 ° electromagnetic isotope separators and is suitable for separating isotopes of alkali metals and rare earth elements. For example, the rubidium element is separated with a maximum total ion current of 10 mA, a maximum total ion current of 66 mA, and an average ion current of more than 25 mA. A large number of results show that: The source has a strong current, focusing performance, stable and reliable, etc., and is expected to be widely used in other fields. Finally, this article also discusses some interesting experimental phenomena appearing in this source and points out the problems for further research.