本文介绍了利用朗谬尔探针对离子源放电特性进行实验研究的一些结果。讨论了离子源的等离子体密度与放电电压,弧流以及外加磁场之间的关系。在放电电压120伏处,离子源的等离子体密度出现极大值,此时,对应的电子能量为最低。等离子体密度与弧流的关系比较简单,而在与外加磁场的关系中也存在有极大值。这三者之间的关系不是独立的,而是相互制约的。 This article describes some of the experimental results of the ion source discharge using Langmuir probes. The relationship between plasma density of ion source and discharge voltage, arc current and applied magnetic field is discussed. At a discharge voltage of 120 V, the plasma density of the ion source shows a maximum value, at which time the corresponding electron energy is the lowest. Plasma density and arc current relationship is relatively simple, but in the relationship with the applied magnetic field there is also a maximum. The relationship between the three is not independent, but mutual restraint.