离子源在电磁同位素分离器中扮演重要角色,其性能直接决定了同位素的产能和品质。离子源具有放电室和引出电极。引出电极里的聚焦电极将束流引出并聚焦,决定了束流的品质。在工作中,聚焦电极被高压电源负偏置,高压电源的电流一般较小以确保长时间稳定工作。实际操作发现,离子源在一定的工作参数下,聚焦电源的电流偏大。经过分析,该现象很有可能是表面电离 Ion source plays an important role in the electromagnetic isotope separator, its performance directly determines the isotope productivity and quality. The ion source has a discharge chamber and an extraction electrode. The focusing electrode in the extraction electrode leads and focuses the beam, which determines the quality of the beam. In operation, the focusing electrode is negatively biased by a high-voltage power supply and the current of the high-voltage power supply is generally small to ensure stable operation over a long period of time. The actual operation found that the ion source in a certain operating parameters, focus on the power supply current is too large. After analysis, the phenomenon is likely to be surface ionization