In electrostatic tandem charged particle accelerators, gas stripping targets are used to convert negative ions into positive ones. Partial ionization of the gas by ions leads to the formation of an undesirable beam of stripping gas ions in the accelerating channels. In this work, the current of a beam of argon ions produced in a tandem accelerator with vacuum insulation was measured by mass spectroscopy. It is shown that the current of argon ions is 2000 times smaller than the current of the proton beam. The reliability of the measurements is provided by visualization of an argon ion beam on the surface of a lithium target and is also confirmed by an experiment with increased gas injection and an estimate of the possible contribution of the proton beam. It is shown that such a small value of the argon ion current does not pose a danger either as a source of additional heating of a lithium target, or as an additional load of a high-voltage power supply, and therefore does not require the previously proposed means for its suppression.

在静电串联带电粒子加速器中，气体剥离目标用于将负离子转化为正离子。离子对气体的部分电离导致在加速通道中形成不希望的汽提气体离子束。在这项工作中，通过质谱法测量了在具有真空绝缘的串联加速器中产生的氩离子束的电流。结果表明，氩离子的电流比质子束的电流小 2000 倍。测量的可靠性是通过锂靶表面上氩离子束的可视化提供的，并且还通过增加气体注入的实验和对质子束可能贡献的估计得到证实。